Setting tool

TECHNICAL FIELD OF THE INVENTION

The present invention relates to a device for detaching intended for connecting detachably the downhole object such as a running tool or tube, to the installation tool. Furthermore, the invention relates to a downhole installation tool for installing an object in a wellbore and to a method for disconnecting downhole object.

BACKGROUND

The installation tools used to install, i.e. anchoring, caps and other items in the wells. To install the plug installation tool can join the running tool connected to the installed plug. After placing the tube in position in the wellbore to plug the drain tool through the axial force is applied, whereby the plug is installed in the well, with the running tool and / or setting tool are disconnected from the plug.

However, in case of failure of the installation process, for example, due to mechanical failure or tube system installation tool, the tube may not be properly installed, whereby the installation tool is not detached from the stopper. In the case of accession to a partially installed plug can be very difficult and even impossible to remove the installation tool from the hole, and then will need special tools. To remove the stuck tool must be heavy and powerful equipment to lift the instrument or if stuck installation tool can not be removed, it is necessary to drill out, resulting in loss of valuable working time.

SUMMARY OF THE iNVENTION

The objective of this invention is the complete or partial elimination of the disadvantages of the prior art. In particular, the object of the invention to provide an improved installation tool, which can be detached from the downhole object such as a running tool or plug in case of failure of mechanical and / or hydraulic system or plug installation tool to the installation tool is stuck downhole.

The above-mentioned problems with many other objectives, advantages and features which will be apparent from the following description, are obtained solution according to the invention by a device for detaching intended for connecting detachably the downhole object such as a running tool or tube, to the installation tool , and detachment apparatus extends between a proximal end intended for connection to an installation tool, and a distal end, intended for connection to a downhole object, the apparatus for removing comprises:

- A base member extending in a longitudinal direction, and

- A connecting member disposed in continuation of the base member, the connecting member is a distal end and a disconnect device for connection to a downhole object,

the connecting member is connected detachably to the base element by means of the activatable disconnection mechanism.

In one embodiment, the activated mechanism for detaching may comprise activated locking sleeve adapted to slide in the longitudinal direction, and a locking member having a plurality of locking fingers adapted to bend in the radially inward direction and fixable on the coupling member, wherein bending locking fingers inwardly governed by the position of the locking sleeve.

In another embodiment, the disconnecting mechanism may further comprise a return spring acting on the locking sleeve and retaining member in mutually opposite directions, wherein the return spring is adapted to move the locking sleeve in the position of disconnection after activation of the locking sleeve to activation, thus detaching mechanism and enabling separation of the connecting element from the base element.

Thus, the downhole object connected to the connecting member may be separated from the rest of the device for removably disconnecting the activating mechanism, thus disconnecting the locking fingers on the coupling member.

In one embodiment, the disconnecting mechanism can be a mechanical disconnecting mechanism with hydraulic drive.

In addition, activated locking sleeve may be provided with a hydraulic drive.

In another embodiment, the activated lock bushing may be adapted to the hydraulic activation by injecting hydraulic fluid into the expandable space formed at least partially the surface of the piston of the locking sleeve, the hydraulic fluid fed into the expandable space is pressurized, acts on the locking sleeve toward the distal end of the device for releasably gripping thereby return spring.

Moreover, the base element may comprise a fluid passage for supplying hydraulic fluid to the expandable space.

In addition, activated locking sleeve may be slidably positioned around at least a portion of the base member, and an expandable space is at least partially formed by the surface of the base member and the locking piston bushing

Additionally, the base member may comprise an annular channel surrounding a projecting central portion of the base member extending in the longitudinal direction, the activated locking sleeve may be arranged slidably around the protruding central portion and positioned slidably between the locking position in which the locking the sleeve may prevent movement of the locking fingers in a radially inward direction, and detaching position in which the retaining fingers can be arranged to bend inwardly

In addition, the fixing member may surround activated locking sleeve.

Additionally, part of the activated locking sleeve may surround a part of the annular channel, thus forming an expandable space for expansion by supplying hydraulic fluid channel for the fluid, located in the base member, the locking sleeve may be movable in the longitudinal direction to the distal end of the device to disconnect, and thereby activate, while return spring can be configured to move the locking sleeve is activated in the opposite direction to detach position after stopping supply of hydraulic fluid

Thus, the downhole object connected to the connecting member may be separated from the apparatus for releasably locking fingers disconnected from the coupling member after stopping supply of hydraulic fluid.

In one embodiment, the base member may comprise a radially extending pin arranged to prevent movement of the locking sleeve by means of return spring in a direction from the distal end of the device to disconnect switch disconnecting activated before activating the locking sleeve.

In another embodiment, the pin may be a safety pin adapted to scrapping feeding hydraulic fluid into the annular chamber, wherein the locking sleeve can be moved in the longitudinal direction to the distal end of the detachment apparatus.

In addition, the locking sleeve may comprise a guide slot cooperating with a pin, and the locking sleeve is rotatable with the locking sleeve is moved to the distal end of the detachment apparatus by supplying hydraulic fluid to the extensible chamber.

Said guide groove may be formed in the shape of the letter

In one embodiment the connecting member may include a first recess disposed on its outer surface for forming a fishing neck.

In another embodiment, the connecting element may comprise a second recess facing inwards and located inside in the connecting member, thereby forming a fishing neck.

In another embodiment, the end of the connecting sleeve limiting the expandable chamber may comprise a protrusion which forms a piston surface facing towards the expandable chamber.

In addition, return spring can be supported on the ledge of the locking sleeve and the end of the fixing member, thus acting on the locking sleeve and retaining member in mutually opposite directions.

Further, the fixing fingers may have protrusions at the distal end to communicate with the recess of the connecting element.

Furthermore, the expandable chamber may be connected with the possibility of transmission of fluid from the wellbore through an inlet control valve, the pressure in the wellbore can be used to feed the hydraulic fluid in the expandable chamber.

Additionally, the connecting member may have an external thread for connecting to the downhole object such as a running tool or stopper.

The external thread of the connecting element can conform to Baker Baker E4-20 or E4-10 standard.

Furthermore, the locking fingers can interact with a recess in the connecting member.

The invention also relates to a downhole installation tool for installing an object, such as cork, in the wellbore, wherein the downhole installation tool extends between a proximal end intended for connection with the tool shell, and a distal end facing the settable subject, wherein the downhole installation tool comprises

- Stroke cylinder, forming a piston chamber,

- A hydraulic piston slidably disposed in the piston chamber for creating a longitudinal impact by supplying hydraulic fluid into the piston chamber, and

- A first piston rod extending from the hydraulic piston,

wherein the downhole tool may include a mounting device for detaching the invention for connecting detachably the piston rod with a downhole object.

Said installation tool may comprise a hydraulic system having a pump unit driven by a motor for supplying hydraulic fluid to the piston chamber.

In addition, the downhole installation tool may further comprise a hydraulic system having a pump unit arranged to actuate the motor and pump unit may be arranged to supply hydraulic fluid to the piston chamber and the expandable device space for disconnection, thus locking sleeve is adapted to activate by supplying hydraulic fluid into the expandable space.

Moreover, the stroke length of the hydraulic piston axially in the striking cylinder can be up to 400 mm.

In one embodiment, the cylinder stroke can comprise a second chamber and a second piston rod extending from the hydraulic piston rod opposite the first piston into the second chamber.

Said second shock cylinder chamber can have an internal pressure substantially equal to the pressure in the well, with the impact exerted on the first piston rod pressure wells can be substantially equalized action exerted on the second pressure piston rod in the second chamber.

Thus, the force required to move the hydraulic piston can be reduced because the effects exerted by wellbore pressure on the piston rod in the direction of movement of the hydraulic piston, can be substantially compensated for the influence exerted on the pressure in the wellbore opposite the piston rod.

In addition, the downhole installation tool may comprise a first longitudinal channel for the fluid located in the cylinder wall of the hammer for supplying hydraulic fluid to the piston chamber of the hydraulic piston to move toward the proximal end of the installation tool downhole.

The downhole installation tool may also include a second longitudinal channel for flowing the second medium, located in the wall of the cylinder for supplying a shock of the hydraulic fluid in the piston chamber of the hydraulic piston to move toward the distal end of the downhole installation tool.

In one embodiment, the first piston rod may have a fluid conduit for supplying hydraulic fluid to the device for disconnection.

Said fluid channel of the first piston rod may be coupled to transmit fluid to the piston chamber and the fluid channel of the base member, the hydraulic fluid can be supplied to a device for removing the channel for the fluid of the first piston rod.

In addition, the fluid passage may be a central passage extending longitudinally of the piston rod.

The downhole installation tool according to the invention may also comprise a retaining member having a plurality of locking fingers adapted to bend in the radial direction and fixable in the recess on the outer surface of the connecting element of the device for disconnection when the hydraulic piston over the entire length to the proximal end of the downhole installation tool .

Furthermore, the locking pins can be locked in a recess on the outer surface of the coupling element when the hydraulic piston is in the uppermost position.

In one embodiment, the downhole tool installation may further comprise an intermediate element extending between the cylinder drums to the distal end of the installation tool downhole.

In another embodiment, the downhole tool installation according to the invention may comprise a mechanical drive for moving the entire installation tool downhole into the wellbore.

Finally, the present invention relates to a method for disconnecting downhole tool, such as the running tool and plugs from downhole installation tool according to the invention, the method comprises the following steps:

- Hydraulic fluid fed to the device for disconnection, whereby the locking sleeve is moved with the rotation around the longitudinal axis of the distal end of the device for removably

- The feed of hydraulic fluid to the device for disconnection, whereby return spring moves the locking sleeve in the disconnecting position, allowing movement of the locking fingers in a radially inward direction, and

- Pulling force is applied to the device for disconnecting the hydraulic piston by moving or pulling the entire downhole installation tool, whereby the locking fingers emerge from the interaction with the connector element.

In one embodiment the pulling force necessary to stop the interaction between the locking fingers to the connecting member, may be 100-300 kg, preferably about 250 kg.

Thus, it is possible to prevent unintentional disconnection of the locking member from the connecting member.

BRIEF DESCRIPTION OF DRAWINGS

The invention and its many advantages are described in more detail below with reference to the accompanying diagrammatic drawings in which are shown to illustrate non-limiting embodiments of the invention, and

FIG. 1 shows a borehole installation tool comprising a device for removably

FIG. 2a shows a device for detachably joining for detachably downhole tool to the mounting object,

FIG. 2b shows an apparatus for detaching from the locking sleeve in the locked position,

FIG. 2c shows a device for removing from the locking sleeve to move to a position releasably

FIG. 3a shows the position of the pin in the guide groove prior to the activation of the locking sleeve,

FIG. 3b shows the position of the pin in the guide groove of the locking sleeve after activation, located in the locking position,

FIG. 3c shows the position of the pin in the guide groove when the locking sleeve in the disconnecting position,

FIG. 4 shows a borehole installation tool is inserted into the wellbore with settable object connected to the device for detaching and

FIG. 5 shows another embodiment of the device for disconnection.

These drawings are schematic, thus they can not be observed scale, and shown in the drawings, only those parts that are necessary for explaining the invention, while other parts are not shown or exist simply understood.

DETAILED DESCRIPTION OF THE INVENTION

FIG. 1 shows a borehole installation tool 1 located between the proximal end 1a and a distal end 1b. The proximal end 1a forms a pair with the rest of the tool shell, and a distal end 1b facing the subject 80 is installed in the well during the operation, as shown in FIG. 4. The downhole tool 1 comprises a mounting cylinder stroke 20, which is a main part longitudinal borehole installation tool 1, and an intermediate member 25 extending from the impact of the cylinder 20 to the distal end 1b of the downhole installation tool 1. The impact cylinder 20 defines a piston chamber 201, in which 22 is a hydraulic piston, slidable and movable between a lowered position in which the hydraulic piston 22 is moved all the way to the distal end 1b of the downhole installation tool 1, as shown in FIG. 1, and an upper position in which the hydraulic piston 22 is moved all the way to the proximal end 1a of installation tool 1. When injecting hydraulic fluid into the piston chamber on respective sides of the hydraulic piston hydraulic piston produces a force in the upward direction to the upper position or in the lower direction to lower position. When the hydraulic piston moves upwardly, hydraulic fluid is pumped by the pump unit 32 from the near side of the hydraulic piston to the far side of the hydraulic piston as shown in FIG. 4. Accordingly, when the hydraulic piston moves downwardly, hydraulic fluid is pumped from the far side of the hydraulic piston to the proximal side of the hydraulic piston. The pump unit 32 shown in FIG. 4, is coupled to transmit fluid from the piston chamber 201 through the channels 27 and 28 located in the wall of the cylinder 20 of shock.

Below the hydraulic piston side facing the distal end of the downhole installation tool of FIG. 1, is called the far side 22a, and the side of the hydraulic piston, facing the proximal end of the downhole installation tool, called the near side 22b. The hydraulic piston 22 to the distal end 1b of the downhole installation tool 1 passes the first piston rod 21. At the first end of the piston rod opposite the hydraulic piston 22 is arranged to disconnect the unit 10. FIG. 1 stroke cylinder may comprise a second chamber 202 and the second piston rod 23 extending from the hydraulic piston in the direction opposite to the first piston rod 21. The second piston rod 23 extends into the second chamber 202, which may have an internal pressure substantially equal to the pressure in the well. Thus, the forces applied to the first piston rod in the borehole pressure may substantially balanced force applied to the second piston rod space pressure in the second chamber 202.

The device 10 for detaching intended to connect the installation tool with adjustable downhole object, as described below. FIG. 2a detaching device 10 extends between the proximal end 10a, connectable to the first piston rod 21 of the downhole installation tool 1, and the distal end 10b, intended to be connected to the downhole object such as a running tool or stopper. The device 10 for detaching element comprises a base 16 extending longitudinally and connected detachably to the connecting member 11 for connection to a downhole object. The connecting member 11 is disposed in continuation of the base member 16 and thus forms a distal end 10b of the device 10 to disconnect.

To be able to detach the coupling member detachment apparatus comprises activatable mechanism 60 detachably that comprises activatable locking sleeve 14, retaining member 13, ambient activated locking sleeve 14 and the return spring 15 acting on the locking sleeve 14 and locking member 13 in mutually opposite directions. Detaching mechanism 60 is retained in an annular channel 161 surrounding the protruding center portion 12 of the base member 16, thus, in particular, locking sleeve 14 may be moved to disconnect the device 10 at a central portion in the longitudinal direction 12. As shown in FIG. 2a, a base member 16 comprises two interacting parts, namely a central portion 12 and a base portion 16a, which are connected to threaded connection 124. By means of the central portion 12 formed as a separate element, detaching mechanism portion 60 can be easily mounted in place to the base assembly element 16.

At the distal end 10b of the device 10 for removing the central portion 12 has a projection 125, serving focus, thus further limiting the longitudinal movement of the locking sleeve 14 and locking member 13. The locking member 13 includes a plurality of locking fingers 131 with protrusions 132. The locking fingers 131 are adapted to bend in the radially inward direction, the protrusions 132 are adapted to lock in a recess 111 in the connecting member 11. Further, when the locking sleeve 14 is in the position shown in FIG. 2a and 2b, the locking fingers 131 can not move in the radially inward direction, wherein the locking sleeve 14 is in a so-called locked position. By limiting the movement of the locking fingers 131 in the radially inward direction and simultaneous longitudinal movement limiting stop member for the projection 125 of the central portion 12 of the base member 16 is provided by attaching the connecting member 11 to the base member 16 removably from it.

To disconnect the connecting member 11 of base member 16 to be translated to position the locking sleeve detachably as shown in FIG. 2c. When locking sleeve is in the disconnecting position, the locking fingers 131 can be rotated in a radially inward direction by application of a pulling force on the connecting element 11.

FIG. 4 shows a borehole installation tool 1 inserted in the well bore 70 with settable subject 80, 10 connected to the device for disconnection. FIG. 1 and in the enlarged part of the device for disconnecting FIG. 2a shows the locking sleeve 14 in the locked position, whereby the connecting member 11 is attached to the base member 16 of the device 10 to disconnect. To set an object, such as cork, between the device and to disconnect the plug is often running tool. In this case, the device for detachably attached to the running tool, and thus indirectly to the plug. To install the device 10 subject to detach pulled upwardly by injecting hydraulic fluid into the piston chamber 201 on the far side 22 of the hydraulic piston 22a, and the hydraulic piston is moved in an upward direction. Hydraulic fluid is supplied to piston chamber 201 on the far side of the hydraulic piston 22a of the channel 28, 22 located in the wall of cylinder 20. Hydraulic percussive fluid entering the piston chamber on the far side of the hydraulic piston, also flows into the fluid channel 211 located in the first the piston rod 21. Channel 211 for fluid is connected in fluid communication with the transfer device 10 for removing and supplying hydraulic fluid into the fluid channel 121 in base member 16. The fluid channel 121 is connected to transmit an expandable fluid space 18, with hydraulic fluid is supplied under pressure into the expandable space, the locking sleeve is adapted to move toward the distal end of the device for releasably gripping thereby return spring. Moving the locking sleeve to the distal end ensures that the locking sleeve in the locking position because the locking fingers 131 still can not move in the radially inward direction.

FIG. 3a and 3b shows the guide slot 141 disposed in the locking sleeve, and a pin 123 extending radially from the base member. The pin 123 extends into the guide groove 141 and cooperates with the guide groove by moving along the length of the groove. When locking sleeve is moved to the distal end of the detachment apparatus using the hydraulic fluid locking sleeve rotates slightly because of the interaction between the pin 123 and the guide groove 141, which is in the form of the letter «j» and also called bayonet groove. Thus, the pin moves in the slot from one end of the slot, as shown in FIG. 3a, in an intermediate position, as shown in FIG. 3b. By this movement of the locking sleeve 14, locking sleeve is activated since the pin 123 extending into the guide slot 141 is no longer restricts the movement of the locking sleeve 14 to the distal end of the device to disconnect under the influence of return spring and removing hydraulic pressure from the locking sleeve. The position of the locking sleeve 14 shown in FIG. 3a, the locking sleeve 14 can not move to the proximal end 10a of the device 10 to disconnect due to the pin 123, whereas in the position shown in FIG. 3b, locking sleeve 14 is no longer restricted from moving in this direction. When the return spring 15 pushes the locking sleeve 14 to the proximal end 10a of the device 10 for disconnecting, the pin 123 is moved to the other end of the guide groove 141, as shown in FIG. 3c and as described below. Interaction function pin and the guide groove can perform the safety pin which prevents longitudinal movement of the locking sleeve before activation. When using activation of the safety pin of the locking sleeve by supplying hydraulic fluid to an apparatus for removing lead to a breakdown of the safety pin, and the locking sleeve may move freely.

One skilled in the art will recognize that the items to be installed in the well, for example, stoppers may have various designs, used different anchoring mechanisms. However, common for most objects is established that, after the installation of the subject portion of the subject is separated from the object side, which contains the actual anchor mechanism. Thus, the separated portion of the object can be removed from the well.

When installing object downhole device 10 to disengage as shown in FIG. 2b, is pulled in an upward direction, as described above. One skilled in the art will appreciate that since the running tool or mounted object is connected to the thread with the external thread 112 of the connecting member 11, a part of the running tool or ascertainable object adjacent to the intermediate member 25, whereby the anchor mechanism mounted object is activated and the object is set to well. In addition, the subject of the installation separates the running tool and / or of the object of that part of the object that contains the escapement. Thus, if the installation is carried out as planned, the hydraulic piston of the downhole installation tool can be moved along the entire length in the up position. When the hydraulic piston 22 shown in FIG. 1, in the upper position, the device 10 is moved to disengage the outermost position within the intermediate member 25 opposite the opening, as shown in FIG. 2c. Within this portion of the intermediate member 25 is a locking element 17 comprising a plurality of flexible fingers 171. The flexible retaining locking pins 171 being movable in a radially outward direction. When the device 10 is moved to disengage in the above extreme position within the intermediate member 25, the flexible locking fingers 171 are deflected radially outward direction, whereby the locking element 17 cooperates with a device 10 for disconnection. As shown in FIG. 2c, the flexible locking fingers 171 interact with the groove 113 on the outer surface of the connecting member 11, fixing thereby disconnecting device. Thus, the coupling member 11 comprises two separate fishing neck which comprise inwardly facing recess 111 located inside in the connecting member and the outwardly facing recess 113 located on the outer surface of the connecting member 11 as described above. Each recess 111 facing inwardly and an outwardly facing recess 113 can be used to capture the coupling element and, accordingly, an object downhole.

If the object installation occurs compartment running tool and / or part of an object from one part of an object, which comprises anchoring mechanism wherein the escapement part is activated, preventing the retrieval of the downhole installation tool, it is possible to activate the device for disconnection to disconnect the downhole installation tool from the running tool and / or a subject, thereby leaving part of the device for disconnection, i.e. a connecting member in the borehole.

To activate a disconnect device shown in FIG. 1, the supply of hydraulic fluid to the piston chamber stops 201 and thereby to the device for disconnection. When no hydraulic fluid impacts more on the locking sleeve 14 shown in FIG. 2a, the retaining sleeve 14 moves return spring 15 in the disconnection position to the proximal end 10a of the device 10 to disconnect. In the position detaching locking sleeve 14 no longer prevents movement of the locking fingers 131 in the radially inward direction as shown in FIG. 2c. Accordingly, the tensile force application to the coupling member leads to disconnection of the coupling member from the base member. The pulling force may be required to pull the entire tool projectile installation comprising a downhole tool, as described below. To prevent accidental disconnection disconnection of the connecting element may require a significant pulling force equal to 100-300 kg. After disconnecting the connector element rest of the installation tool downhole running tool is disconnected from and / or mounted object installation wherein the downhole tool can be removed from the well.

Similarly, the supply of hydraulic fluid to the device for disconnection can be stopped when the locking member 17 engages with the coupling element and thus fixes the apparatus 10 to disengage. Since the locking member 17 holds the connecting member 11, there is no need to hold the locking sleeve 14 in the locked position to prevent disconnection of the coupling member 11 of base member 16. As described above, the termination of supplying the hydraulic fluid moves the locking sleeve return spring 15 in position detachably with this disconnection mechanism 60 no longer holds the coupling member 11.

FIG. 4 shows a borehole installation tool 1 inserted in the casing 160 in the bore hole 70. In addition to the above shown here downhole installation tool 1 comprises a pump unit 32 for pumping hydraulic fluid in the stroke cylinder 20 at the respective sides of the hydraulic piston, the anchor section 30 for securing the downhole installation tool 1 in the bore 70 of the well and a mechanical actuator 40 to move the entire borehole 1 installation tool down the sloping trunk sections of 70 wells. Depending on the specific requirements of the installation, the downhole tool may or may not contain a mechanical actuator 40 and / or the anchor section 30.

As shown in FIG. 5, the connecting element 11 comprises a central portion 11a having a protrusion. The protrusions 132 locking fingers 131 of the locking element 13 interacting with the recess 111 in the connecting member 11 formed by protrusion 19. Locking sleeve 14 is located in an annular cavity in the base member 16 and the spring 15 is disposed between the locking sleeve and the locking finger, whereby device 10 disconnecting restricts further longitudinal movement of the locking sleeve 14 and the retaining member 13. The locking fingers 131 are configured to bend in the radially inward direction, the protrusions 132 are adapted to lock in a recess 111 in the connecting member 11. Furthermore, when the locking sleeve 14 is in position shown in FIG. 5, the locking fingers 131 can not move in the radially inward direction, wherein the locking sleeve 14 is in the locked position. By limiting the movement of the latching fingers 131 radially inwardly while limiting longitudinal movement of the locking element connecting member 11 is joined detachably to the base member 16. If the device 10 for disconnecting or accidentally disconnected or not accidental fall from the downhole object for the retrieval of the subject can be as a fishing neck to use the projection 19 and recess 11.

By borehole fluid or fluid is meant any type of fluid which may be present in the oil and gas wells, for example, natural gas, petroleum, oil solution, crude oil, water, etc. By means any type of gas composition of the gas present in the well, the well or downhole equipment from openhole, wherein at the oil is any oil-containing composition, for example, crude oil, oily fluid, etc. Thus, fluids with gas, oil and water may contain other components and substances other than, respectively, the gas, oil and water.

Under understood casing tube system of pipes, the tubular part, the casing, liner or any type of column used downhole in oil or natural gas.

If instruments are not fully immersed in the entire length of the casing, then to push them along the entire length in the desired position in the well downhole tractor can be used. A downhole tractor is any kind of driving tool adapted to push or lift the tools in the borehole, eg Well Tractor®.

Although the invention has been described with respect to preferred embodiments, those skilled in the art will appreciate that a number of modifications without removal from the spirit of the invention disclosed in the appended claims.