Casing window assembly.

(54) Title: CLADDING PIPE WINDOW ASSEMBLY.

(54) Title: CASING WINDOW ASSEMBLY.

(57) Summary

A casing window assembly and the methods for installing the casing window assembly are presented.

(57) Abstract

A casing window assembly and methods for installing the casing window assembly.

PATENT TITLE No. 349371

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Owner (s): HALLIBURTON ENERGY SERVICES, INC.

Address: 10200 Bellaire Boulevard, Houston, Texas, 77072, USA

Designation: LINING PIPE WINDOW ASSEMBLY.

Classification: CIP: E21B43 / 10; E21B17 / 00; E21B29 / 06

CPC: E21B43 / 10; E21B23 / 004

Inventor (s): DAVID JOE STEELE

REQUEST

Number: International Presentation Date:

MX / a / 2014/011867 April 04, 2012

Validity: Twenty years

Expiration Date: April 4, 2032

Issue Date: July 26, 2017

The reference patent is granted based on articles 1^or, 2^or fraction V, 6th fraction IIF, and 59 of the Industrial Property Law.

In accordance with article 23 of the Industrial Property Law, this patent has&gt; a 20-year date that is not extended or is counted from the filing date of the international application and will be subject to the payment of the fee to keep the rights.

Whoever signs this title does only based on the provisions of articles 6 "fractions III and 7^or bis 2 of the Industrial Property Law (Official Gazette of the Federation (DOF) 06/2711991. amended on 08/02/1994, 10/25/1996, 12/26/1997, 05/17/1999, 26 / 01/2004, 06/16/2005, 01/25/2006, 05/06/2009, 01/06/2010, 06/18/2010, 06/28/2010, 01/27/2012 and 04/09 / 2312): articles 1, 3^or fraction V part a), 4^or and 12th sections I and III of the Regulations of the Mexican Institute of Industrial Property (DOF 14 12/1999 amended on 07/01/2002, 07/15/2004, 07/28/2004 and 09/07/2007); items 1^or, 3°, 4°, 5^or Section V subsection a), 16 sections I and III and 30 of the Organic Statute of the Mexican Institute of Industrial Property (DOF 12/27/1999, amended on 10/10/2002, 07/29/2004, 08/04/2004 and 09/13/2007), 1, 3^or and 5^or subsection a) of the Agreement that delegates powers to the Deputy General Directors, Coordinator, Divisional Directors, Heads of Regional Offices. Divisional Deputy Directors, Departmental Coordinators and other subordinates of the Mexican Institute of Industrial Property. (DOF, 12/15/1999, amended on 02/04/2000, 07/29/2004, 08/04/2004 and 09/13/2007). "

This official letter is signed with an advanced electronic signature (FIEL), in accordance with articles 7 BIS 2 of the Industrial Property Law; 3 of its Regulations, and 1 section III, 2 section V, 26 BIS and 26 TER of the Agreement establishing the guidelines for the use of the Payment and Electronic Services Portal (PASE) of the Mexican Institute of Industrial Property, in the procedures indicated.

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THE DIVISIONAL DIRECTOR OF PATENTS

NAHANNY CANAL REYES

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INSTITUTO MEXICAN.) OF INDUSTRIAL PROPERTY

CLADDING PIPE WINDOW ASSEMBLY

FIELD OF THE INVENTION

The present invention relates generally to a casing window assembly and to methods of installing the casing window assembly.

BACKGROUND OF THE INVENTION

Wells are typically drilled using a drill string with a drill bit secured at the lower free end and subsequently completed by positioning a string of pipes within the well and cementing the string in position. The casing increases the integrity of the wellbore and provides a fluid path between the surface and the selected underground reservoir for the injection of treatment chemicals into the surrounding reservoir in order to stimulate extraction, for the reception of the flow of hydrocarbons from the reservoir, and to allow the introduction of fluids for reservoir management or disposal purposes.

During conventional milling and / or drilling operations, a casing window assembly could be used for the completion of a lateral well. A conventional pipe window assembly

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INDUSTRIAL casing generally includes a section of casing with a pre-milled window through the side of the casing for tool entry and an outer sleeve comprising aluminum connected around the pre-milled window. to protect the ring within the casing from debris and concrete as the casing is secured into the well. However, this type of casing window assembly has several disadvantages such as, for example, a larger outside diameter around the casing where the outer sleeve is connected, a lower pressure rating and has need to be milled before drilling the side well.

Other conventional casing window mounting designs include a section of the casing with the window pre-milled through the side of the casing for a tool entry and an inner steel sleeve connected to the window. Pre-milled to protect the interior of the casing from debris and concrete as the casing is secured into the hole. Although this type of mounting provides a better seal for the pre-milled window and may have a higher pressure rating, mounting requires a separate strip of

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Of LA MturiEOAO INBUSTMAL recovery before drilling the lateral well. This additional separation strip to remove the inner sleeve can cost more than $ 1,350,000 pesos ($ 100,000.00 dollars) to recover from a deep well.

Other components of a conventional casing window assembly could include, for example, a mandrel carrying a diverter wedge and / or a termination diverter and a separate targeting member secured below a pre-milled window in the casing that orients the diverter wedge and / or termination diverter in the lateral position and suitable depth that is substantially equal to the same lateral position and depth as the pre-milled window. In this way, the orienting member orients the diverter wedge and / or termination diverter so that the milling / drilling tool could enter the reservoir through the pre-milled window at the proper lateral position and depth. Because most conventional targeting members provide guidance for both lateral position and depth at the same time, achieving adequate lateral position and depth in deeper wells can be time consuming and difficult due to the amount of of the torque or torque imposed on the drill column. In other words, as the poll column is

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INDUSTRIAL slowly reversed from the top, the drill column torque increases and causes the bottom of the drill column, where the diverter wedge and / or termination diverter are located, to rapidly rotate in deeper applications. This often avoids the search for the proper lateral position, which is not known until torque is transmitted back to the drill string.

SUMMARY OF THE INVENTION

The present invention overcomes one or more of the disadvantages of the prior art by utilizing an improved casing window assembly to complete a side well without milling through any portion of the assembly.

In one embodiment, the present invention includes a casing window assembly, comprising: i) a casing tubular sleeve having an inside diameter, an outside diameter, and a hole between the inside diameter and the outside diameter that forms a casing window, the inside diameter includes a recessed wall profile for receiving of a portion of an expandable wall and a recess for receiving a portion of a securing element; and ii) an inner sleeve releasably secured within the casing sleeve.

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by the expandable wall or the pigmented ^^ n-amment and having an inner diameter, an outer diameter and a wall between the inner diameter and the outer diameter, a portion of the wall that forms the expandable wall and another portion of the wall which includes a portion of the securing element.

In another embodiment, the present invention includes a method for installing a casing window assembly, comprising: i) Lower the casing window assembly into a well or main borehole to a predetermined depth, the casing window assembly includes a tubular casing sleeve with a casing window and a secured inner sleeve , releasably, within the casing sleeve in a pre-released position adjacent to the casing window; ii) releasing the inner sleeve from the casing sleeve; and iii) releasably securing the inner sleeve within the casing sleeve in a post-released position below the casing window,

In still another embodiment, the present invention includes a casing window assembly, comprising: i) a tubular casing sleeve having an inside diameter, an outside diameter, and a hole between the inside diameter and the in. -tit,,_t,. mexican. 1&gt; E LA Pk: FIEDAL NC

INr-USTXIAL outside diameter forming a casing window; ii) a mandrel having an upper end and a lower end, at least one of the upper end of the mandrel and the lower end of the mandrel includes an expandable stop and orientation wedge; and iii) an orientation member secured within the casing sleeve below the casing window, the orientation member includes a plurality of guide elements separated by a plurality of grooves, The plurality of slots includes an orientation slot that directs the mandrel toward a lateral position that is substantially the same as the lateral position of the casing window and that allows the mandrel to be lowered to a depth that is substantially the same as the depth of the casing window.

These and other objectives, characteristics and advantages of the present invention will be apparent to those skilled in the art from the following description of the different embodiments and related figures.

BRIEF DESCRIPTION OF THE FIGURES

The invention will be described with reference to the attached figures, in which the same elements are referred to with the same reference numbers, and in which:

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Figure 1 is a cross-sectional view illustrating an upper end of an inner sleeve for one embodiment of a casing window assembly in accordance with the present invention.

Figure 2 is a cross-sectional view illustrating an intermediate section of the inner sleeve for the casing window assembly in Figure 1.

Figure 3 is a cross-sectional view illustrating a lower end of the inner sleeve for the casing window assembly in Figure 1.

Figure 4 is a cross-sectional view illustrating a lower end of a casing sleeve for the casing window assembly in Figure 1.

FIG. 5 is a cross-sectional elevation view illustrating a casing sleeve, mandrel, and orientation member for another embodiment of a casing window assembly in accordance with the present invention.

Figure 6A is a schematic view illustrating the mandrel and orientation member for casing window assembly in Figure 5 where the mandrel is positioned at a suitable depth and orientation.

Figure 6B is a schematic view illustrating the mandrel and orientation member for mounting of

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INDUSTRIAL '* «- *' * __ ~ casing window in Figure 5 where the mandrel is rotated from the wrong depth to the proper depth and orientation.

DETAILED DESCRIPTION OF THE INVENTION

In the following detailed description of the preferred embodiments, reference is made to the accompanying figures which form a part thereof, and in which the specific preferred embodiments in which the inventions could be practiced are shown by way of illustration. These modalities are described in sufficient detail to allow those skilled in the art to practice the invention, and it will be understood that other modalities could be used and that logical changes could be made without departing from the spirit and scope of the present invention. Thus, the claimed subject matter could also be included in other modes, including structures, steps and combinations similar to those described herein, in conjunction with other present or future technologies. Therefore, the following detailed description is not taken in a limiting sense, and the scope of the present invention is only defined by the appended claims.

Next, referring to Figures 1-4, a cross-sectional view illustrates one embodiment of an improved casing window assembly 100.

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The casing window assembly 100 includes an upper end of an inner sleeve 116 (Figure 1), an intermediate section of inner sleeve 116 (Figure 2), and a lower end of inner sleeve 116 (Figure 3). The casing window assembly also includes a lower end of a tubular casing sleeve 102 (Figure 4).

The casing sleeve 102 has an inside diameter 104, an outside diameter 106, and a hole between the inside diameter 104 and the outside diameter 106 that forms a casing window, which could be pre-milled. The inside diameter 104 of casing sleeve 102 includes a recessed wall profile 108 for receiving a portion of an expandable wall 110 and a plurality of recesses for receiving a portion of a respective securing element. The recessed wall profile 108 of the casing sleeve 102 and the expandable wall 110 are circumferential. Inner sleeve 116 is releasably secured within casing sleeve 102 by expandable wall 110 and / or one or more securing elements, and has an inner diameter 118, an outer diameter 120, and a wall 122 between inside diameter 118 and outside diameter 120. A portion of wall 122 forms expandable wall 110 and another portion of

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Wall 122 includes a portion of a securing member 112 and a portion of another securing member 113. The other portion of wall 122 could further include a counter-securing member 114 and another counter-securing member 115 opposite the securing member. securing 112 and opposite the other securing element 113, respectively. Preferably, the securing element 112 and the counter securing element 114 are positioned above the casing window. Preferably, the other securing member 113 and the other counter securing member 115 are positioned below the casing window. The number of securing elements could depend on a number of factors including, for example, the design of the casing window assembly 100 and the conditions under which it could be used.

The inner diameter 118 of the inner sleeve 116 includes a recessed wall portion 126 with a hole for receiving the securing element portion 112 and a counter-securing element portion 114. The inner sleeve 116 is secured, releasably. , in another inner sleeve 128 by means of a cutting element 130 and / or by another cutting element 131. The other inner sleeve 128 includes an outer diameter 132 with a recess 134 and another

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OF THE PROPERTY

INDUSTRIAL recess 135 for the reception of an assurance-element 112 and a portion of the counter-assurance element 114, respectively.

Each recess in the inside diameter 104 of the casing sleeve 102 and each respective securing member 112, another securing member 113, the counter-securing member 114, and another counter-securing member 115 releasably secures, inner sleeve 116 within casing sleeve 102 in a pre-released position as illustrated in Figure 1. The expandable wall 110 and the recessed wall profile 108 of the casing sleeve 102 releasably secure the inner sleeve 116 within the casing sleeve 102 in a post-released position. Therefore, expandable wall 110 and recessed wall profile 108 could be designed to withstand a predetermined force that releasably secures inner sleeve 116 within casing sleeve 102 in the post-released position. One end of the recessed wall profile 108 includes a bracket 124 as illustrated in Figure 4. Bracket 124 secures inner sleeve 116 substantially almost in the post-released position when a force causes inner sleeve 116 to release from the post-released position and move toward bracket 124,

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The outer diameter 120 of the inner sleeve 116 includes a circumferential recess above the casing window for receiving one seal 136 and another circumferential recess below the casing window for receiving another seal 138. Seal 136 and other seal 138 improve the pressure rating for casing window assembly 100 where each seal could be an O-ring or any other well-known sealing element. Additional seals 137, 139 could be included to further improve the pressure rating of the casing window assembly 100. Therefore, casing window assembly 100 could be rated with a high pressure rating of at least 8,500 psi due to its unique design. Each seal 136, 137, 138, 139 and / or inner sleeve 116 substantially prevents fluid communication between the main bore and within the interior of casing sleeve 102 adjacent the casing window when the Inner sleeve 116 is releasably secured in the pre-released position. In this way, the interior area of ​​casing sleeve 102 could be protected from debris and concrete as the casing is secured within the main borehole or bore.

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100 it could be installed within a main borehole by lowering the casing window assembly 100 toward the main well to a predetermined depth. Inner sleeve 116 is releasably secured within casing sleeve 102 at the pre-released position at the predetermined depth adjacent the casing window. The inner sleeve 116 could be released from the casing sleeve 102 by a downward force imposed by a tool at one end of the other inner sleeve 128 in this way, cutter 130 and / or other cutter 131 is cut and other inner sleeve 128 is caused to release and travel downward into wall recessed portion 126 until a portion of securement member 112 and / or or a portion of the counter-securing element 114 falls into the recess 134 and the other recess 135, respectively. In this way, the securing element 112 and / or the other securing element 114 fall out of the recesses in the inner diameter 104 of the casing sleeve 102. Similarly, the other securing element 113 and the other element counter-lock 115 fall out of the recesses in the inside diameter 104 of the casing sleeve 102. The window mount installation

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i Μ PI INJTtTUTO MÜUCANC Ot LA FWrTTFtvu ΙΝΟυΤΓΚΙΛΙ of casing 100 could be completed by releasably securing the inner sleeve 116 inside the casing sleeve 102 in the post-released position below the casing window . Once the inner sleeve 116 is released from the casing sleeve 102 in the manner described in this way, the inner sleeve 116 travels down into the casing sleeve 102 until the expandable wall 110 enters the recessed profile. of wall 108 of casing sleeve 102 and thus expands, releasably securing the inner sleeve within the casing sleeve 102 in the post-released position below the casing window. Thus, a separate strip within the main bore is not necessary to retrieve the inner sleeve 116. Alternatively, however, the inner sleeve 116 could be removed from the casing window assembly 100 in the main bore.

A bushing could be positioned within the recessed wall profile 108 of the casing sleeve 102 to prevent bit cuts and / or other debris from settling on the recessed wall profile 108 and bracket 124 that could prevent them from inner sleeve 116 is moved to the post-released position. The¹⁵

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D £ THE INDUSTRIAL PROPERTY bushing could be made of cardboard or some other well-known compressible scrub that could prevent drill cuts and / other debris from settling on the recessed wall profile 108 and bracket 124 while allowing the inner sleeve 116 compresses or otherwise displaces the bushing so that inner sleeve 116 could travel to the post-released position.

Once the casing window assembly 100 is installed, The casing window assembly 500 described with reference to Figures 5-6 could be used to orient a tool within the casing sleeve 102 in a lateral position that is substantially the same as the lateral position of the casing window. casing and to lower the tool to a depth that is substantially the same as the depth of the casing window. Once the tool reaches the proper lateral position and depth, the tool could be positioned through the casing window when the inner sleeve 116 is releasably secured in the post-released position.

Next, referring to Figure 5, a cross-sectional elevation view illustrates another embodiment of an improved casing window assembly.

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500, The CT5 'TeO ^ SLimiunLu 500 pipe window assembly includes a tubular casing sleeve 502, a mandrel 508, and an orientation member 514. The casing sleeve 502 has an inner diameter 504 and an outer diameter 506. The lower end of mandrel 508 could include a plurality of expandable stop and orientation wedges 512. Preferably, the plurality of expandable guide and stop wedges 512 is spring loaded or could be actuated by any other well known mechanical, electrical, hydraulic or other means.

Chuck 508 has an upper end opposite the lower end. The upper end of mandrel 508 could include another plurality of expandable stop and orientation wedges 513, depending on the preferred incremental orientation of mandrel 508. Preferably, the other plurality of expandable stop and orientation wedges 513 is spring loaded or could be actuated by any other mechanical, electrical, hydraulic or other well-known means. The upper end of mandrel 508 could also include a deflector wedge or termination deflector positioned above the plurality of expandable stop and orientation wedges 512 and the other plurality of expandable stop and orientation wedges 513.

Orientation member 514 is secured within casing sleeve 502 below the

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MEXICAN INSTITUTE

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INDUSTRIAL window casing, however, could be an integral component. Orientation member 514 includes a plurality of guide elements 516 separated by a plurality of grooves 518. The plurality of slots 518 includes a plurality of orientation slots that direct the mandrel 508 toward the lateral position that is substantially the same as the lateral position of the casing window and that allows the mandrel 508 to be lowered to a depth that it is substantially the same as the depth of the casing window. Each of the plurality of expandable stop and orientation wedges 512 and each of the other plurality of expandable stop and orientation wedges 513 could be positioned within a slot of the respective plurality of slots 518 as a function of contact with one of the plurality of guide elements 516. Therefore, the plurality of orientation grooves first direct the mandrel 508 toward the lateral position that is substantially the same as the lateral position of the casing window before allowing the mandrel 508 to be lowered to the depth that is substantially the same as the casing window depth. If the plurality of expandable stop and orientation wedges 512 and / or the other plurality of expandable stop and orientation wedges 513 are not

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OF THE INDUSTRIAL PROPERTY r £ J properly aligned within the slots Ha orientation, then the mandrel 508 cannot be lowered to the proper depth and has to be rotated once more until the plurality of expandable stop and orientation wedges 512 and the other plurality of expandable guide and stop wedges 513 are properly aligned within the orientation slots. In this manner, the proper lateral position for the mandrel 508 is located to position the diverter wedge or termination diverter in a lateral position that is substantially the same as the lateral position of the casing window prior to lowering the mandrel 508. , with the diverter wedge or termination diverter, to a depth that is substantially the same as the depth of the casing window. In this way, the proper lateral position is conveniently determined without the delay associated with conventional orientation members that is caused by torque in the drill string. The preferred number of the plurality of slots 518, including the orientation slots, could depend on the preferred number of the plurality of expandable stop and orientation wedges 512 and / or the preferred number of the other plurality of expandable stop and orientation wedges 513.

Next, with reference to Figure 6A, is illustrated a schematic view of the mandrel 508 and the member fNtTfTl 'Tu M EX ICA NO DE LA PR' 'PIEDAD

Orientation IM 514 for the assembly of -u-ani-ana Ha 500 casing where the mandrel is positioned in a suitable depth and orientation. For the sake of clarity, the tracks of three wedges of the plurality of expandable stop and orientation wedges 512 and two wedges of the other plurality of expandable stop and orientation wedges 513 are illustrated. The plurality of grooves 518 are spaced the same distance around the circumference of the orientation member 514 in 72 ° increments, however, it could be spaced in any other preferred mode or increment. Because the mandrel 508 is aligned in a suitable depth and orientation, each of the three wedges of the plurality of expandable stop and orientation wedges 512 is positioned within a respective slot of the plurality of slots 518 which are referred to as the orientation grooves.

Next, with reference to Figure 6B, there is illustrated a schematic view of mandrel 508 and orientation member 514 for casing window mounting 500 wherein the mandrel is rotated from an inappropriate depth to a suitable depth and orientation. . Because the mandrel 508 is misaligned to an inappropriate depth, it has to be turned axially up once to index the mandrel 508 to the proper depth and orientation as is.

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INSTITUTO MEXICANO illustrated by way of one of the plural ex expansibles of top and orientation 512 and 1¾. via one of the other plurality of expandable stop and orientation wedges 513. The design of the orientation member 514 and its plurality 5 of guide elements 516 could be referred to as the indexing or walking slot configuration J that allows the mandrel 508 to be effectively captured and automatically indexed to the next of the plurality of slots 518 for a new orientation until the proper depth and orientation are reached. If the following orientation is correct, then the mandrel 508 will move further downward providing an indication on the surface that the mandrel 508 is in the correct depth and orientation.

It is noted that in relation to this date, the best method known to the applicant for putting the aforementioned invention into practice is that which is clear from the present description of the invention.

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