Apparatus and method for severing a wellbore tubular
Abstract
This record has no abstract on file.
Term
0.3 yearsto projected expiry
Projected expiry 27 December 2026, counted from filing; an application has no term until it is granted.
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27 claims: 15 independent, 12 dependent
- 1Patent claims Zastrzeżenia patentowe 1. A device (10;200;220;250;300) intended for cutting off a wellbore tubular element, the device comprising at least one blade (50;70;140) having a blade width to be cut across the longitudinal axis of said wellbore element, characterized by in that said at least one blade comprises a single projection (60;80;150;310) comprising a pointed end and an end at the base (57;77;144) wider than said sharpened end, but narrower than said blade width, wherein said sharpened end and end at the base are connected via cutting surfaces of the projection, said at least one blade has an adjacent cutting surface on each side of said end at the base, and the arrangement is such that in use, when said at least one blade (50;70;140) is moved towards said wellbore tubular element, first said sharpened end pierces the wall of said wellbore element, further movement of said at least one blade in said direction causes a progressive cutting of said wall by said cutting surfaces of the projection so as to reduce the structural strength of said the tubular element of the well and leave part of said wall remaining to be cut off, and secondly, said portion of the wellbore tubular element is cut off by said adjacent cutting surfaces on each side of said end at the base of said single projection. 1. Urządzenie (10;200;220;250;300) przeznaczone do odcinania elementu rurowego odwiertu, które to urządzenie zawiera co najmniej jedno ostrze (50;70;140) maj ące szerokość ostrza do przecinania w poprzek osi podłużnej wspomnianego elementu rurowego odwiertu, znamienne tym, że wspomniane co najmniej jedno ostrze zawiera pojedynczy występ (60;80;150;310) zawieraj ący zaostrzony koniec oraz koniec przy podstawie (57;77;144) szerszy niż wspomniany zaostrzony koniec, ale węższy niż wspomniana szerokość ostrza, przy czym wspomniany zaostrzony koniec oraz koniec przy podstawie są połączone za pośrednictwem tnących powierzchni występu, wspomniane co najmniej jedno ostrze ma przyległą tnącą powierzchnię po każdej stronie wspomnianego końca przy podstawie, zaś rozmieszczenie jest takie, że w trakcie użytkowania, gdy wspomniane co najmniej jedno ostrze (50;70;140) jest przemieszczane w kierunku wspomnianego elementu rurowego odwiertu, najpierw wspomniany zaostrzony koniec przebija ścianę wspomnianego elementu rurowego odwiertu, dalszy ruch wspomnianego co najmniej jednego ostrza we wspomnianym kierunku powoduje postępuj ące przecinanie wspomnianej ściany przez wspomniane tnące powierzchnie występu tak, aby zmniejszyć wytrzymałość strukturalną wspomnianego elementu rurowego odwiertu i pozostawić część wspomnianej ściany pozostaj ącą do odcięcia, a po drugie wspomniana część elementu rurowego odwiertu jest odcinana przez wspomniane sąsiednie tnące powierzchnie po każdej stronie wspomnianego końca przy podstawie wspomnianego pojedynczego występu.
- 10Urządzenie według dowolnego z zastrzeżeń 5 do 9, w którym pierwszy występ, tnące powierzchnie pierwszego ostrza, drugi występ, a także tnące powierzchnie drugiego ostrza pokryte są powłoką o niskim tarciu. Ten. A device according to any of claims 5 to 9, wherein the first projection, the cutting surfaces of the first blade, the second projection, as well as the cutting surfaces of the second blade are coated with a low friction coating.
- 11A device according to any of claims 5 to 10, wherein the first blade (36, 301) comprises a top and bottom, and the second blade (38;302) comprises a top and bottom, and the tops and bottoms of both these blades are coated with a low friction coating . 11. Urządzenie według dowolnego z zastrzeżeń 5 do 10, w którym pierwsze ostrze (36, 301) zawiera wierzch oraz spód, a także drugie ostrze (38;302) zawiera wierzch oraz spód, zaś wierzchy i spody obydwu tych ostrzy pokryte są powłoką o niskim tarciu.
- 14A device according to any of claims 5 to 13, wherein the first blade (36;301) comprises a first top and first bottom, the second blade (38;302) comprises a second top and second bottom, the cutting surfaces of the first projection are inclined downward from the first top to the first bottom, and the cutting surfaces of the second protrusion are inclined downwardly from the second top to the second bottom. 14. Urządzenie według dowolnego z zastrzeżeń 5 do 13, w którym pierwsze ostrze (36;301) zawiera pierwszy wierzch oraz pierwszy spód, drugie ostrze (38;302) zawiera drugi wierzch oraz drugi spód, tnące powierzchnie pierwszego występu są nachylone w dół od pierwszego wierzchu do pierwszego spodu, zaś tnące powierzchnie drugiego występu są nachylone w dół od drugiego wierzchu do drugiego spodu.
- 16A device according to any of claims 4 to 15, wherein the cutting surfaces of the first projection are located at an angle to each other in the range between 30 degrees and 90 degrees. 16. Urządzenie według dowolnego z zastrzeżeń 4 do 15, w którym tnące powierzchnie pierwszego występu są usytuowane pod kątem względem siebie mieszczącym się w zakresie pomiędzy 30 stopni a 90 stopni.
- 17A device according to any of claims 5 to 16, wherein the cutting surfaces of the second projection are positioned relative to each other at an angle in the range between 30 degrees and 90 degrees. 17. Urządzenie według dowolnego z zastrzeżeń 5 do 16, w którym tnące powierzchnie drugiego występu są usytuowane względem siebie pod kątem mieszczącym się w zakresie pomiędzy 30 stopni a 90 stopni.
- 18A blade (36, 38;301, 302) designed for use in a device for cutting off a tubular element of a wellbore having the features of a blade according to any of claims 1 to 17. 18. Przeznaczone do zastosowania w urządzeniu do odcinania elementu rurowego odwiertu ostrze (36, 38;301, 302) maj ące cechy ostrza według dowolnego z zastrzeżeń 1 do 17.
- 20Sposób odcinania elementu rurowego odwiertu w poprzek jego osi podłużnej, który to sposób obejmuje etapy:twenty. A method of cutting off a wellbore tubular element across its longitudinal axis, which method comprises the steps of: (a) shearing said wellbore tubular element using at least one blade (50;70;140) having a blade width;(a) ścinania wspomnianego elementu rurowego odwiertu z wykorzystaniem co najmniej jednego ostrza (50;70;140) maj ącego szerokość ostrza;characterized in that step (a) comprises (b) using a blade comprising a single projection (60;80;150;310) comprising a pointed end and an end at the base (57;77;144) which is wider than said sharpened end, but narrower than said blade width, said sharpened end and end at the base are connected via cutting surfaces of the projection, said at least one blade includes adjacent cutting surfaces on each side of said end at the base;and (c) displacing said at least one blade towards said wellbore tubular member, whereby first said sharpened end pierces the wall of said wellbore tubular member, further moving said at least one blade (50;70;140) in said direction, it causes a progressive cut of said wall through said cutting projection surfaces to reduce the structural strength of said wellbore tubular element and leaving a portion of said wall remaining to be cut off, and secondly said part of the wellbore tubular element is cut off by said adjacent cutting surfaces on each side of said end at the base of said single projection. znamienny tym, że etap (a) obejmuje (b) zastosowanie ostrza zawieraj ącego pojedynczy występ (60;80;150;310) zawieraj ący zaostrzony koniec oraz koniec przy podstawie (57;77;144), który jest szerszy niż wspomniany zaostrzony koniec, ale węższy niż wspomniana szerokość ostrza, wspomniany zaostrzony koniec oraz koniec przy podstawie są połączone za pośrednictwem tnących powierzchni występu, wspomniane co najmniej jedno ostrze zawiera sąsiednie tnące powierzchnie po każdej stronie wspomnianego końca przy podstawie;i (c) przemieszczenie wspomnianego co najmniej jednego ostrza w kierunku wspomnianego elementu rurowego odwiertu, dzięki czemu po pierwsze wspomniany zaostrzony koniec przebija ścianę wspomnianego elementu rurowego odwiertu, dalszy ruch wspomnianego co najmniej jednego ostrza (50;70;140) we wspomnianym kierunku powoduje postępuj ące cięcie wspomnianej ściany przez wspomniane tnące powierzchnie występu w celu zmniejszenia wytrzymałości strukturalnej wspomnianego elementu rurowego odwiertu i pozostawiaj ąc część wspomnianej ściany pozostaj ącą do odcięcia, a po drugie wspomniana część elementu rurowego odwiertu jest odcinana przez wspomniane sąsiednie tnące powierzchnie po każdej stronie wspomnianego końca przy podstawie wspomnianego pojedynczego występu.
- 25The method of any one of claims 20 to 24, further comprising the step of substantially flattening the wellbore tubular element prior to performing step (a). 25. Sposób według dowolnego z zastrzeżeń 20 do 24, obejmuj ący ponadto etap zasadniczego spłaszczenia elementu rurowego odwiertu przed wykonaniem etapu (a).
- 26The method of any one of claims 20 to 25, wherein steps (a) and (b) are performed as part of the method for closing the wellbore tubular member to suppress eruption. 26. Sposób według dowolnego z zastrzeżeń 20 do 25, w którym etapy (a) oraz (b) wykonywane są jako część sposobu do zamknięcia elementu rurowego odwiertu w celu powstrzymania erupcji.
- 27The method of any one of claims 20 to 26, wherein the wellbore tubular element comprises a housing, a drill pipe, a drill collar or a tool connection. 27. Sposób według dowolnego z zastrzeżeń 20 do 26, w którym element rurowy odwiertu zawiera obudowę, rurę wiertniczą, kołnierz wiertniczy albo narzędziowe połączenie. Authorized:National Oilwell Varco, LP Proxy: Uprawniony: National Oilwell Varco, L.P. Pełnomocnik: MSc. Irena Rachubik mgr inż. Irena Rachubik Patent Attorney Rzecznik patentowy FIG. 2 A FIG. 2 A. FIG. 2C FIG·2B FIG. 2CFIG·2B FIG. 3B FIG. 5P FIG. 3B FIG. 5P FIG. 5A FIG. 5A FIG. 4A FIG. 4A FIG. 4B FIG. 4B FIG. 4C FIG. 4C FIG. 5A FIG. 5A 105 105 FIG. 5B FIG. 5B FIG. 5C FIG. 5C 106 106 FIG. 6A FIG. 6A FIG. 6 & FIG. 6& FIG. ec no FIG. ec no FIG. 7A FIG. 7A FIG. 7B FIG. 7B 7C FIG.7C ISO ISO RG. θΑ RG. θΑ 200 200 220 220 302- ^ * r- ί 502 ^ 302-^ *r- ί 502^ FIG. 15A 1515 FIG.15A FIG. 1515 FIG. 15F FIG. 15F FIG. 15G FIG. 15G 301 301 FIG. 15H FIG. 15H DOCUMENTS PRESENTED IN THE DESCRIPTION DOKUMENTY PRZEDSTAWIONE W OPISIE Ta lista dokumentów przedstawionych przez Zgłaszającego została przyjęta jedynie dla informacji czytającego i nie jest częścią składową europejskiego opisu patentowego. This list of documents submitted by the Applicant was adopted only for the information of the reader and is not part of the European patent specification. It was created with great care;However, the European Patent Office shall not be liable for any errors or omissions. Została ona utworzona z dużą starannością;Europejski Urząd Patentowy nie ponosi jednak żadnej odpowiedzialności za ewentualne błędy i braki. Dokumenty patentowe przedstawione w opisie · US 4537250 A [0006] · US 5217073 A [0007] Patent documents presented in the description · US 4537250 A [0006] · US 5217073 A [0007]
Independent claims15
76 paragraphs, as filed
The present invention relates to a device for cutting off a wellbore tubular element, a blade intended for use in such a device, an anti-destruction head comprising this device, and a method for cutting off a wellbore tubular element.
[0002] The prior art discloses a wide variety of anti-eruption heads and tubular cutting blades for anti-eruption head guards. [0003] Typical anti-eruption heads comprise selectively moved beaters in oppositely positioned casings attached to the main body. Flails are either tubular flails (used to contact, engage and surround the pipe and / or tools to seal the well) or shear flails (used to contact and physically shear a pipe element, housing, pipe or tool used in drilling operations). The rams are usually located opposite each other on each side of the main body and may, after actuation and subsequent shearing of the tubular element, seal tightly against each other in the center of the main body in the center of the well.
[0004] Typical flails include a flail block on which they are attached in a manner that allows them to be removed, various elements, for example seals and / or cutting blades.
[0005] There is a need for an anti-discharge head that can efficiently and efficiently cut off tubular elements, e.g., tubular components used in drilling operations, including relatively large tubular components, such as, for example, housing, drill flanges, and tool pipe connections. In certain known tubular shearing systems, the tool joint is positioned such that the shearing beaters do not encounter the tool joint, but shear only a relatively smaller portion of the tubular member. One of the problems with these types of systems is that the correct positioning takes time, and if the tool connection is positioned incorrectly, it can result in missing or inefficient cutting.
[0006] US-A-4 537 250 discloses a flail shearing device for a wellhead comprising a body with a vertical bore running through it and aligned, opposite flail guides extending outwardly in the body from the borehole. Each guide has a flail assembly, and each flail assembly includes a flail body with a shear blade located on the surface of the flail, as well as elements for moving the flail in and out in the guide. The cutting edge of the upper cutting blade and the surface of the beater assembly below the upper cutting blade are concave to sufficiently support the draft during shearing to limit the thrust below the upper cutting blade when it is cut into the shape of a suitable tool for extracting the tools and enabling flow through it. The lower shear blade comprises at least one node extending towards the upper shear blade such that when the pipe is sheared, the node engages and penetrates the inside of the pipe before other shearing of the pipe in order to reduce the force used for this type of execution shear.
[0007] US-A-5 217 073 discloses a cutting and closing device intended for pressure pipes in production and supply installations for gaseous and liquid media, which includes a two-piece clamping block. The cutting pipe and the closing pipe plate are pushed into the inside of said clamping block by means of a propelling charge and a piston, both of which form part of the drive unit. The clamping block is divided in the center of its circular hole into a rear part and a front part. The back and front can be bolted together. The back part and the front part have rectangular slots on the inside. The front part also has a slotted hole large enough for the shear plate. The shear plate runs in the guide grooves of the bolted connector to the front of the clamping block. The cable is attached to a drive unit consisting of a pressure cylinder, piston and a reservoir providing a remote firing propellant charge.
[0008] According to the present invention, a device is provided for cutting off a wellbore tubular element, which device comprises at least one blade with a blade width intended to be cut across the longitudinal axis of said wellbore element, characterized in that said at least one blade comprises a single projection comprising a pointed end, as well as a wider end at the base than said pointed end, but narrower than said blade width, wherein said sharpened end and end at the base are connected via cutting surfaces of the projection, said at least one blade having an adjacent cutting surface on each side of said end at the base, while the arrangement is such that in use, when said at least one blade is moved towards said wellbore tubular element, first said sharpened end pierces the wall of said wellbore tubular element, further movement of said at least one blade in said direction causes a progressive cutting of said wall through said cutting surfaces of the protrusion so as to reduce the structural strength of said wellbore tubular element, and to leave a portion of said wall remaining to cut off . and then said portion of the wellbore tubular element is cut off by said adjacent cutting surfaces on each side of said end at the base of said single projection. Preferably, the projection can move from a retracted position away from the wellbore tubular element to an extended position in which it is in contact with said wellbore tubular element. The area in which structural strength is reduced may include an area in which shear occurs and / or an adjacent area.
[0009] The projection may comprise a portion with a gradually increasing width, whereby during use this projection penetrates and pierces the wall of the wellbore tubular element while the respective surfaces on opposite sides of the part shear the tubular element simultaneously in opposite circumferential directions.
[0010] Further features of the device are set out in claims 2 to 17, which are now pointed out.
[0011] According to another aspect of the present invention, there is provided a blade for use in the above-mentioned device having all the features described herein.
[0012] According to another aspect of the present invention, there is provided an anti-discharge head comprising a device as described above.
[0013] According to yet another aspect of the present invention, there is provided a method of cutting a wellbore tubular member across its longitudinal axis, the method comprising the following steps:
(a) shearing said tubular element of the wellbore using at least one blade with a certain width of the blade;
It is characterized in that this step comprises (b) using a blade comprising a single projection comprising a pointed end and an end at the base which is wider than said sharpened end but narrower than said blade width, said sharpened end and end at the base are connected through the cutting surfaces of the projection, wherein said at least one blade comprises adjacent cutting surfaces on each side of said end at the base; and (c) displacement of said at least one blade towards said wellbore tubular element, whereby first said sharpened end pierces the wall of said wellbore tubular member, further movement of said at least one blade in said direction causes a progressive cut of said wall by said cutting projection surfaces to reduce the structural strength of said wellbore tubular element, which is to be cut off, and secondly said portion of the wellbore tubular element is cut off by said adjacent cutting surfaces on each side of said end at the base of said single projection.
[0014] Further steps of this method are set out in claims 21 to 27, which are now pointed out.
[0015] For a better understanding of the present invention, reference is now made, by way of example only, to the accompanying drawings in which:
Figure 1A is a side view, partly in cross section, of a first embodiment of an anti-discharge head according to the present invention;
figure 1B is a top view, partly in cross-section, of the anti-corruption head of figure 1A;
figure 1C is a side view, partly in cross section, of the anti-corruption head of figure 1A in operation;
figure 2A is a perspective view from above of a first embodiment of the blade of the present invention;
figure 2B is a bottom perspective view of the blade of figure 2A;
figure 2C is a top view of the blade of figure 2A;
figure 2D is a side view of the blade of figure 2A;
figure 3A is a perspective view from above of a second embodiment of the blade of the present invention;
figure 3B is a bottom perspective view of the blade of figure 3A;
figure 3C is a top view of the blade of figure 3A;
Figure 3D is a cross-sectional view taken along the 3D-3D line of Figure 3C;
Figure 4A is a perspective view from above of a blade useful for understanding the present invention;
figure 4B is a bottom perspective view of the blade of figure 4A;
figure 4C is a top view of the blade of figure 4A;
figure 4D is a cross-sectional view along line 4D-4D of figure 4C; Figure 5A is a perspective view from above of a blade useful for understanding the present invention;
figure 5B is a bottom perspective view of the blade of figure 5A;
figure 5C is a top view of the blade of figure 5A;
Figure 5D is a cross-sectional view taken along the lines 5D-5D in Figure 5C; Figure 6A is a perspective view from above of a blade useful for understanding the present invention;
figure 6B is a bottom perspective view of the blade of figure 6A;
figure 6C is a top view of the blade of figure 6A;
figure 6D is a cross-sectional view along line 6D-6D of figure 6C; Figure 7A is a perspective view from above of a blade useful for understanding the present invention;
figure 7B is a bottom perspective view of the blade of figure 7A;
figure 7C is a top view of the blade of figure 7A;
Figure 7D is a cross-sectional view taken along the line 7D-7D of Figure 7C; Figure 8A is a perspective view from above of a third embodiment of the blade of the present invention;
figure 8B is a bottom perspective view of the blade of figure 8A;
figure 8C is a top view of the blade of figure 8A;
Figure 8D is a cross-sectional view taken along the line 8D-8D in Figure 8C; Figure 9A is a perspective view from above of a blade useful for understanding the present invention;
figure 9B is a bottom perspective view of the blade of figure 9A;
figure 9C is a top view of the blade of figure 9A;
figure 9D is a cross-sectional view along line 9D-9D of figure 9C; figure 10 is a schematic top view of a second embodiment of the anti-discharge head according to the present invention;
figure 11 is a schematic top view of a third embodiment of the anti-discharge head according to the present invention;
figure 12 is a schematic side view, partly in cross section, of a fourth embodiment of an anti-discharge head according to the present invention;
figure 13 is a schematic side view, partly in cross section, of a fifth embodiment of the anti-discharge head according to the present invention;
figure 14 is a schematic top view of a sixth embodiment of the anti-discharge head according to the present invention; and Figures 15A-15H show schematically the various stages in operation of the anti-discharge head of the present invention intended for cutting off the tubular element.
[0016] As shown in Figures 1A to 1C, the anti-corruption head according to the present invention has a body 12 with a vertical through hole 14 running through it. In use, a tubular element, being for example a part of the drill string D, passes through a through hole 14. The body 12 comprises a lower flange 16 and an upper flange 18 for connecting the anti-blowout head 10 to the wellhead system. Guides 20 and 22 of flails extend outwards on opposite sides of the opening 14. The flail assemblies of the anti-destruction head 10 comprise a first flail and a second flail, 24 and 26, which are located in the guides 20 and 22, respectively. A reciprocating device, e.g., actuator 28, is used to move or extend the beaters in response to the fluid pressure in the hole 14 to shear a portion of the drill string D that extends through the hole and withdraw the beaters from the hole. Each of the actuators 28 includes a piston 30 in the cylinder 32 and a connecting rod between the piston and the beater which is to be displaced and are respectively connected to the body 12 as shown. A suitable device serves for supplying the fluid under pressure to opposite sides of the piston 30.
[0017] The upper cutting blade 36 (any blade according to the present invention) is located on the beater 24 and the lower cutting blade 38 (any blade according to the present invention) is located on the beater 26. The cutting blades 36 and 38 are arranged such that the cutting edge 38 passes directly below the cutting edge of the blade 36 when cutting a section of a tubular element, for example a drill string D.
[0018] The cutting action of the cutting blades 36 and 38 results in cutting of the drilling string D (see figure 1C). The lower part of the drill string D falls into the borehole (not shown) below the anti-discharge head 10. Alternatively (as is typical for each method of the present invention) the drill string D is suspended from the lower set of beaters.
[0019] Figures 2A-2D show a blade 50 according to the present invention which includes a body 52 with a base 57 and a front surface 54. The front surface 54 comprises two inclined parts 61, 62 and a projection 60 which protrudes from the front surface 54 between both inclined parts 61, 62. Edges 56, 58 are located at the ends of the inclined parts 61, 62, respectively. The projection 60 comprises two inclined surfaces 63, 64 that meet at the central edge
65. The angle 68 between surfaces 63, 64 (which may be typical of the angle between any two surfaces of the projection of the present invention) may be any desired angle and in some aspects of the invention ranges between 30 degrees and ninety degrees, and in some particular aspects of the present invention has a value of 30 degrees, 60 degrees or 90 degrees.
[0020] In some aspects of the present invention (which is typical for each blade of the present invention) the cutting surfaces are inclined relative to the vertical direction, and in one particular aspect of the present invention as shown in Figure 2D, two inclined parts 61, 62 are located at an angle of 20 degrees to the vertical direction. In other aspects of the present invention, the angle of any cutting surface of any blade of the present invention is between 20 degrees and 60 degrees; while in some respects this angle is 20 degrees, 45 degrees or 60 degrees.
[0021] Figures 3A-3D show a blade 70 according to the present invention, which includes a body 72 with a base 77, two opposing inclined surfaces 81, 82, and a projection 80 located between two inclined surfaces 81, 82. The projection 80 comprises two inclined surfaces 83, 84, which meet at the central edge 85. The sloped end portions 76, 78 are located on surfaces 81, 82, respectively.
[0022] Figures 4A-4D show blade 90 with body 99; opposing inclined surfaces 91, 92, opposing inclined surfaces 93, 94; and also inclined end portions 95, 96. The protrusions 97, 98 are formed between surfaces 91, 93, respectively. The blade 90 includes a base 90a.
[0023] Figures 5A-5D show a blade 100 with a body 100a; opposed inclined surfaces 101, 102; opposite inclined surfaces 103, 104; and opposite sloping end portions 105, 106. The projections 107, 108 are formed between the surfaces 101, 103 and 104, 102, respectively. The blade 100 includes a base 109. The projection 107 includes an edge 107a, and the projection 108 includes an edge 108a.
[0024] Figures 6A-6D show a blade 110 with a body 110a; two inclined surfaces 111, 112; two opposite inclined surfaces 113, 114; sloped end portions 115, 116; the middle semi-circular inclined surface 117, as well as the base 110b. The projections 118, 119 are formed between the surfaces 111, 113 and 114, 112, respectively. The projection 118 comprises an edge 118a, while the projection 119 includes an edge 119a.
[0025] Figures 7A-7D show a blade 120 that includes a body 122, base 124, opposing inclined surfaces 126, 128, inclined surfaces 132, 134, inclined end portions 136, 138, as well as a semicircular inclined surface 130. The serrated cutting surface 125 extends around the bottom edge 127 of the surface 130 and extends partially over the surfaces 126, 128. As shown, the serrated surface 125 includes pointed tips 129, but optionally these tips can be rounded. Surfaces 126, 132 are angled with respect to each other to form a projection 131 with edge 135. Surfaces 128, 134 are angled with respect to each other to form a projection 133 with edge 137.
[0026] Figures 8A-8D show a blade 140 according to the present invention, which includes a body 142, base 144, opposing inclined surfaces 146, 148, projection 150 located between surfaces 146, 148, as well as inclined end parts 156, 158. Projection 150 has inclined surfaces 151, 152 and a central surface 153. A projection 155 having an edge 154 is formed between the surfaces 156, 146. A projection 157 is formed between surfaces 148, 158, including an edge 159. Optionally, as shown, the projection 150 is rounded. [0027] Figures 9A-9D show a blade 160 that includes a body 162, base 164, opposing inclined surfaces 172, 173, inclined end portions 171, 174, projections 181, 182, and a recess 180 formed between projections 181, 182. A projection 161 with an edge 163 is formed between the surface 172 and the end portion 171. The projection 165 with the edge 167 is formed between the surface 173 and the end part 174. The projection 181 includes the inclined surfaces 183, 185 and the inclined central part 184. The projection 182 includes the inclined surfaces 186, 188 and the inclined central part 187. Optionally, according to protrusions 181, 182 are rounded.
[0028] Figure 10 shows a device 200 intended to cut off a tubular element (e.g., but not limited to, a drill pipe, drill collar, housing, chute, piping, and drill pipe tool joints - which applies to and can be obtained for any device of the present invention, and also for any blade or blades of the present invention). The device 200 includes two alternating movable beaters sets 201, 202 and 203, 204. In one aspect of the present invention, each beater 201, 202 includes a series of spaced breakthrough points (or projections) 206 that make a series of corresponding spaced holes in the element tubular, thereby weakening the tubular element and facilitating its complete cutting through blades 208 (any according to the present invention) of beaters 203, 204. In some aspects of the present invention there are one, two, three, four, five, six or more points, and optionally, these points may have hardened surfaces or may contain curing material applied to them (which refers to any blade, blade protrusion or the blade element disclosed herein according to the present invention with respect to curing and / or curing material). Any such point or points may be used on any blade of the present invention and / or these blades may be deleted.
[0029] Figure 11 shows an apparatus 220 according to the present invention, which includes two sets of movable beaters 221, 222 and 223, 224. Bumpers 221, 222 contain flat surfaces 228 that are used to flatten tubular element 229 ("flattening" means making non-circular in any degree compared to the initial circular shape of tubular element 229 and includes, but is not limited to substantially or completely flattened element tubular), e.g. as shown by the dotted line in Figure 11. After flattening, the tubular element 229 is completely cut off by blades 225, 226 on beaters 223, 224, respectively. The blades 225, 226 can be any blades according to the present invention.
[0030] Figure 12 illustrates a method of cutting off a tubular member 230 by either applying a tensile stress T to a tubular member along its length using the tensile stress applying device TA shown schematically (see arrows T) or by applying a compressive stress to it. using a compressive stressing device CA shown schematically (see arrows C). The flail devices 231, 232, respectively, with blades 233, 234 of the anti-blow head 235 can move so as to cut off the tubular element 230.
[0031] Alternatively, in the case of two-stroke (or multi-stroke) operation, the tubular element 230 is stressed and the blades 233, 234 hit the tubular element, then the tubular element is compressed, and the blades 233, 234 completely cut off the tubular element, or vice versa. The stretching and / or compression step or steps may be used with any method of the present invention, including but not limited to the methods illustrated in figures 10-15.
[0032] Figure 13 illustrates the method of the present invention in which torque is applied to the tubular element 240 during its cutting off using blades 242, 243 (any blade or blades according to the present invention) of movable flail devices 244, 245 of the anti-blow head 246 . Rotation of the tubular element 240 can be achieved using any suitable rotating device located next to and / or below the tubular element, for example the RA device (shown schematically in figure 13). The torque generating step or steps may be used with any method of the present invention.
[0033] Figure 14 shows the method of the present invention for either cutting off tubular element 254 using blades 255 on movable beaters 256 inside the anti-discharge head 250 using controlled explosives 252 located inside or on movable elements 253, or a method for weakening the tubular element at specific desirable locations to facilitate completion of the cutting of the tubular element by the blades of the present invention. Alternatively, 252 loads are mounted on blades 255 or 256 flails. One, two, three, four or more loads can be used.
[0034] Figures 15A-15H illustrate the method of the present invention using an anti-blow head 300 (shown schematically in Figure 15B) of the present invention (for example, such as each disclosed herein) with movable beaters R (shown schematically in Figure 15B) with blades 301, 302 (blade 301 similar to blade 302; blade 302 inverted relative to blade 301 - as can be the case with any two blades of any device disclosed herein). Each blade 301, 302 includes a body 304 and a central projection 310 with a sharpened element 312 and cutting parts 313, 314. Each projection 310 includes cutting surfaces 310a, 310b. The cutting surfaces are inclined from the vertical and the projections 310 have cutting surfaces angled with respect to each other. The beaters R move the blades so that initially the projections 310 are in contact and pierce the tubular element T (e.g. housing, drill pipe, tool joints, drill flanges and the like), and then, following the movement of the protrusions into the interior of the tubular element T and by cutting the tubular element T through the projections 310 and the cutting parts 313, 314, they completely cut off the tubular element T. The projections 310 are diametrically opposed so that the outermost points of the projections (and then the other parts of the projections) perform pushing each other, making it easier to pierce the tubular element and then cut the tubular element. This use of double opposing piercing projections also serves to keep the tubular element in the desired position within the anti-blow head 300 during cutting, so that the piercing and cutting process proceeds using blades 301, 302 held in the desired orientation relative to the tubular element T.
[0035] As shown in Figure 15B, points 312 of the projections 310 have shifted to contact the outer surface of the tubular member T. After contacting, the points 312 hold the tubular member in place. Figure 15C shows the initial entry of points 312 into the tubular element T.
[0036] As shown in Figure 15D, points 312 pierced the entire wall thickness of the tubular element T and push the parts T1, T2 and T3, T4. Figure 15E illustrates further inward movement of points 312 and further separation of tubular parts T1, T2 and T3, T4.
[0037] As shown in Figure 15F, when points 312 progress inward and lower point 312 (looking at figure 15F) passes below upper point 312, cutting surfaces 313 and 314 begin to cut tubular element T. The projections 310 intersect a portion of the tubular element T, and the cutting surfaces 313, 314 (as well as the projections 310 as they continue to move through the tubular element) need to cut only the remainder of the tubular element T in order to complete the cutting off of the tubular element T. In some aspects of this of the invention and depending on the size of the tubular element, the projections 310 may cut off the entire tubular element.
[0038] As shown in Figure 15G, the tubular element T is almost completely cut and the upper projection 310 continues to move above the lower projection 310, while each of these projections further pierces the tubular element and the surfaces 313, 314 continue to further push tubular parts T1, T2 and parts T3, T4. Figure 15H shows the tubular element T completely cut off.
[0039] Optionally, only one blade 301 or 302 is used, and the other blade does not include a projection or projections.
[0040] As shown in the various figures of the drawing (e.g., figures
1A, 12, 13, 15A) in some aspects it is preferred that one blade is inverted relative to the opposite blade. When a blade with a central projection (or two such blades) is used, then the cutting surfaces adjacent to the cutting projection either do not cut the tubular element at all, or only need to cut a fraction of the total wall thickness of the circumference of the tubular element (in contrast to, for example, some known "V-type" or "V-shaped" blades in which each cutting surface cuts a significant part of the tubular element). [0041] It is also within the scope of the present invention to cover each blade according to the present invention (or any known blade) or parts thereof and / or its cutting surfaces and / or its top and / or bottom and / or its part piercing the tubular element with a coating. low friction, for example, but not limited by a polytetrafluoroethylene coating, electroless nickel coating and / or titanium / nickel coating, including but not limited to, low friction coatings applied in the process of physical vapor deposition (PVD). Such coatings are shown, for example, as coating 69 (figure 2A) and coating 209 (figure 10), as well as in the form of coating 79 (figure 3A) at the top of the blade and in the form of coating 75 (figure 3A) at the bottom of the blade, applied with using any useful method or process. These coatings can be applied in any known thickness for low friction applications.
77 members in 12 offices
Priority claims8
| Document | Office | Kind | Date |
|---|---|---|---|
| 41120306 | United States of America | A | |
| 41120306 | United States of America | A | |
| 06820703 | European Patent Office (EPO) | A | |
| 2006050478 | United Kingdom | W | |
| 2006050478 | United Kingdom | W | |
| EP20060820703 | – | – | – |
| US20060411203 | – | – | – |
| WO2006GB50478 | – | – | – |
Members77
| Document | Office | Kind | |
|---|---|---|---|
| US2007246215A1 | United States of America | A1 | |
| AU2006342770A1 | Australia | A1 | |
| CA2649771A1 | Canada | A1 | |
| CA2747138A1 | Canada | A1 | |
| CA2754716A1 | Canada | A1 | |
| WO2007122365A1 | World Intellectual Property Organization (WIPO) | A1 | |
| US7367396B2 | United States of America | B2 | |
| US2008286534A1 | United States of America | A1 | |
| EP2013443A1 | European Patent Office (EPO) | A1 | |
| NO20084286L | Norway | L | |
| NO20111367L | Norway | L | |
| NO20150275L | Norway | L | |
| CN101427003A | China | A | |
| RU2008146406A | Russian Federation | A | |
| US7814979B2 | United States of America | B2 | |
| RU2401935C2 | Russian Federation | C2 | |
| US2011000670A1 | United States of America | A1 | |
| EP2013443B1 | European Patent Office (EPO) | B1 | |
| AT511596T | Austria | T | |
| DK2013443T3 | Denmark | T3 | |
| EP2363572A1 | European Patent Office (EPO) | A1 | |
| US2011226475A1 | United States of America | A1 | |
| US2011226476A1 | United States of America | A1 | |
| US2011226477A1 | United States of America | A1 | |
| CA2649771C | Canada | C | |
| US8066070B2 | United States of America | B2 | |
| CA2801036A1 | Canada | A1 | |
| CA2801800A1 | Canada | A1 | |
| WO2011148190A2 | World Intellectual Property Organization (WIPO) | A2 | |
| WO2011148191A2 | World Intellectual Property Organization (WIPO) | A2 | |
| WO2011148192A2 | World Intellectual Property Organization (WIPO) | A2 | |
| BRPI0621572A2 | Brazil | A2 | |
| EP2400109A2 | European Patent Office (EPO) | A2 | |
| EP2400110A2 | European Patent Office (EPO) | A2 | |
| PL2013443T3This record | Poland | T3 | |
| EP2400109A3 | European Patent Office (EPO) | A3 | |
| US2012000647A1 | United States of America | A1 | |
| US2012006529A1 | United States of America | A1 | |
| WO2011148190A3 | World Intellectual Property Organization (WIPO) | A3 | |
| WO2011148191A3 | World Intellectual Property Organization (WIPO) | A3 | |
| WO2011148192A3 | World Intellectual Property Organization (WIPO) | A3 | |
| EP2400110A3 | European Patent Office (EPO) | A3 | |
| CA2754716C | Canada | C | |
| CA2747138C | Canada | C | |
| CN101427003B | China | B | |
| AU2011256976A1 | Australia | A1 | |
| CN102985637A | China | A | |
| EP2576960A2 | European Patent Office (EPO) | A2 | |
| EP2576961A2 | European Patent Office (EPO) | A2 | |
| EP2576962A2 | European Patent Office (EPO) | A2 | |
| US8424607B2 | United States of America | B2 | |
| EP2400110B1 | European Patent Office (EPO) | B1 | |
| US8602102B2 | United States of America | B2 | |
| PL2400110T3 | Poland | T3 | |
| US8720564B2 | United States of America | B2 | |
| US8720565B2 | United States of America | B2 | |
| US8720567B2 | United States of America | B2 | |
| RU2012157801A | Russian Federation | A | |
| CA2801036C | Canada | C | |
| EP2400109B1 | European Patent Office (EPO) | B1 | |
| DK2400109T3 | Denmark | T3 | |
| CA2801800C | Canada | C | |
| EP2576962B1 | European Patent Office (EPO) | B1 | |
| EP2576960B1 | European Patent Office (EPO) | B1 | |
| AU2011256976B2 | Australia | B2 | |
| PL2400109T3 | Poland | T3 | |
| RU2559238C2 | Russian Federation | C2 | |
| CN102985637B | China | B | |
| EP2576961B1 | European Patent Office (EPO) | B1 | |
| NO340135B1 | Norway | B1 | |
| NO340141B1 | Norway | B1 | |
| DK2576961T3 | Denmark | T3 | |
| NO343971B1 | Norway | B1 | |
| BR112012030131A2 | Brazil | A2 | |
| BR112012030133A2 | Brazil | A2 | |
| BR112012030131B1 | Brazil | B1 | |
| BR112012030133B1 | Brazil | B1 |
Numbers
- Publication, DOCDB
- 2013443
- Publication, EPODOC
- PL2013443T
- Application
- 820703
- Application, DOCDB
- 06820703
- Application, EPODOC
- PL20060820703T
Titles2
- English
- APPARATUS AND METHOD FOR SEVERING A WELLBORE TUBULAR
- Polish
- Urządzenie i sposób odcinania elementu rurowego odwiertu
Classification
- CPC, 6
- E21B33/063
- Y10T83/0581
- Y10T428/24777
- Y10T83/0596
- Y10T83/75
- Y10T83/9447
- IPC, 1
- E21B33 06