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CA-3172462-C - A RUNNING TOOL FOR A LINER STRING

CA3172462CCA 3172462 CCA3172462 CCA 3172462CCA-3172462-C

Abstract

A liner string (10) for a wellbore includes a liner hanger assembly LHA (30) and a liner hanger deployment assembly LHDA (20) releasably attached to the LHA (30). The LHDA (20) includes a central bore (21) and a running tool (400) moveable from a locked position to an unlocked position, the running tool including a flow path in communication with the central bore (21). The liner string further includes a chamber (900) disposed between the LHDA and LHA, wherein the chamber is in selective fluid communication with the flow path. Wherein, when the flow path is closed, the chamber (900) is isolated from the central bore, and when the flow path is open, the flow path provides fluid communication between central bore and chamber (900).

Inventors

  • Rocky A. Turley
  • Mark J. Murray
  • Mike A. Luke

Assignees

  • WEATHERFORD TECHNOLOGY HOLDINGS, LLC

Dates

Publication Date
20260505
Application Date
20210312
Priority Date
20200401

Claims (19)

  1. What is claimed is: 1. A liner string for a wellbore, comprising: a liner hanger assembly (LHA); a liner hanger deployment assembly (LHDA) releasably attached to the LHA, including: a central bore; and a running tool moveable from a locked position to an unlocked position, the running tool including: a flow path in communication with the central bore; a shearable plug including the flow path, wherein the flow path is closed by a portion of the shearable plug; and a seat sleeve moveable from a closed position to an open position to shear away the portion of the shearable plug to open the flow path; and a chamber disposed between the LHDA and LHA, wherein the chamber is in selective fluid communication with the flow path; wherein: when the flow path is closed, the chamber is isolated from the central bore; and when the flow path is open, the flow path provides fluid communication between the central bore and the chamber.
  2. 2. The liner string of claim 1, wherein the flow path is configured to close to prevent fluid communication between the chamber and the central bore when the running tool is in the unlocked position. 41 Date Re9ue/Date Received 2024-05-16
  3. 3. The liner string of claim 1, the LHDA further including: a bonnet moveable with respect to the running tool and sealingly bounding an upper end of the chamber; and a packoff including a seal stack and sealingly bounding a lower end of the chamber.
  4. 4. The liner string of claim 3, the LH DA further including a seal bypass moveable from a first position to a second position adjacent the seal stack, wherein the seal bypass is configured to allow fluid communication between the chamber and a wellbore fluid when positioned adjacent the seal stack.
  5. 5. The liner string of claim 3, the LHDA further including: a packer actuator; and a connector selectively attaching the LHDA to an upper portion of the LHA, wherein the bonnet is moveably disposed within the connector, and wherein the connector is configured to detach from the upper portion of the LHA in response to a force applied by the packer actuator.
  6. 6. The liner string of claim 1, wherein the chamber includes water before the flow path is opened.
  7. 7. A liner string for a wellbore, comprising: a liner hanger assembly (LHA); a liner hanger deployment assembly (LHDA), including: a running tool attached to the LHA in a locked position and released from the LHA in an unlocked position, the running tool including: a tubular body including a bore; a body sleeve disposed about the tubular body; 42 Date Re9ue/Date Received 2024-05-16 a shearable plug including a flow path and a closure member, wherein the closure member blocks the flow path from fluid communication with the bore; and a first sleeve moveable from a closed position to an open position to remove the closure member to expose the flow path; and a chamber formed between the LHA and LHDA and isolated from fluid communication with the bore when the first sleeve is in the closed position and when the running tool is in the unlocked position.
  8. 8. The liner string of claim 7, the LHDA further including: a connector selectively attaching the LHDA to a polished bore receptacle (PBR) of the LHA; a bonnet disposed in the connector and moveable with respect to the connector and sealingly bounding an upper end of the chamber; and a packoff including a seal stack and sealingly bounding a lower end of the chamber.
  9. 9. The liner string of claim 8, the LHDA further including a seal bypass moveable from a first position to a second position adjacent the seal stack, wherein the seal bypass is configured to allow fluid communication between the chamber and a wellbore fluid when in the second position.
  10. 10. The liner string of claim 8, the LHDA further including: a packer actuator; wherein the connector is configured to detach from the PBR in response to a force applied by the packer actuator. 43 Date Re9ue/Date Received 2024-05-16
  11. 11. The liner string of claim 8, the connector further comprising: a tubular body; a plurality of dogs disposed in the tubular body, the plurality of dogs including a radially extended position and a radially retracted position; and a second sleeve disposed in the tubular body, wherein the plurality of dogs are in the radially extended position when the second sleeve is in a first position and wherein the plurality of dogs are in the radially retracted position when the second sleeve is in a second position; and a thrust bearing assembly moveable from the first position to the second position in response to the movement of the second sleeve to the second position.
  12. 12. A method of operating a liner string, comprising: deploying the liner string comprising a liner hanger deployment assembly (LHDA) attached to a liner hanger assembly (LHA) into a wellbore, wherein a chamber is disposed between the LHDA and LHA and is isolated from a central bore of the LHDA; actuating a running tool of the LHDA to open a flow path between the chamber and the central bore, wherein actuation the running tool further includes: engaging an object with a seat of a sleeve disposed in the central bore; and increasing pressure above the object to move the sleeve from a closed position to an open position, wherein the movement of the sleeve to the open position shears a shearable plug to open the flow path that is disposed within the shearable plug; and increasing pressure in the chamber to set a liner hanger of the LHA after actuating the running tool. 44 Date Re9ue/Date Received 2024-05-16
  13. 13. The method of claim 12, further comprising: moving the running tool from a locked position to an unlocked position to release the LHDA from the LHA after setting the liner hanger, wherein the flow path is closed when the running tool is in the unlocked position.
  14. 14. The method of claim 13, the LHDA further including a packer actuator, a connector attached to a polished bore receptacle (PBR) of the LHA, a seal bypass, and a packoff including a seal stack, the method further comprising: lifting the LHDA relative to the LHA to engage the packer actuator with the connector and to position the seal bypass adjacent the seal stack, wherein the chamber is in fluid communication with a wellbore fluid via the seal bypass; lowering the LHDA relative to the LHA to set a packer of the LHA and to release the connector from the PBR; and removing the LH DA from the wellbore.
  15. 15. The method of claim 12, the LHDA further including a packer actuator, a seal bypass, and a packoff including a seal stack, the method further comprising: lifting the LHDA relative to the LHA to engage the packer actuator with a polished bore receptacle (PBR) of the LHA and to position the seal bypass adjacent the seal stack, wherein the chamber is in fluid communication with a wellbore fluid via the seal bypass.
  16. 16. The liner string of claim 1, wherein the portion of the shearable plug is a cap.
  17. 17. The liner string of claim 1, wherein the shearable plug includes a groove, and a seal is disposed in the groove. Date Re9ue/Date Received 2024-05-16
  18. 18. The liner string of claim 7, wherein the closure member is a cap.
  19. 19. The liner string of claim 7, wherein the shearable plug includes a groove, and a seal is disposed in the groove. 46 Date Re9ue/Date Received 2024-05-16

Description

WO 2021/202086 BACKGROUND Field PCT/US2021/022183 A RUNNING TOOL FOR A LINER STRING [0001] Embodiments of the present disclosure generally relate to a running tool for a liner string. Description of the Related Art [0002] Liner hangers are used to suspend a liner from another tubular string in a wellbore. Conventional hydraulic liner hangers are actuated in response to pressure above a threshold to set slips. The liner strings are long and the wellbore can have deviations and turns. During run-in, an increase in fluid circulation through the liner string may be necessary to facilitate moving the liner string through the deviations and/or turns. The increase in fluid circulation in the liner string may inadvertently actuate the liner hanger in the wellbore above the intended setting location. Unintended setting of the liner hanger results in the need to remove the liner string and to conduct a subsequent wellbore operation. [0003] There exists a need for a liner hanger running tool that prevents premature actuation of the liner hanger. SUMMARY [0004] The present disclosure generally relates to a running tool for a liner string and methods for completing downhole operations. [0006] In one embodiment, a liner string for a wellbore includes a liner hanger assembly (LHA) and a liner hanger deployment assembly (LHDA) releasably attached to the LHA. The LHDA includes a central bore and a running tool moveable from a locked position to an unlocked position, the running tool including a flow path in communication with the central bore. The liner string further includes a chamber disposed between the LHDA and LHA, wherein the chamber is in selective fluid communication with the flow path. Wherein, when the flow path is closed, the chamber is isolated from the central bore, and when the flow path is 1 CA 03172462 2022-9-20 open, the flow path provides fluid communication between central bore and chamber. [0006] In one embodiment, a liner string for a wellbore includes a LHA and a LHDA. The LHDA includes a running tool attached to the LHA in a locked position and released from the LHA in an unlocked position. The running tool including a tubular body having a bore, a body sleeve disposed about the tubular body, a shearable plug having a flow path and a closure member, wherein the closure member blocks the flow path from fluid communication with the bore, and a first sleeve moveable from a closed position to an open position to remove the closure member to expose the flow path. The liner string further includes a chamber formed between the LHA and LHDA and isolated from fluid communication with the bore when the first sleeve is in the closed position and when the running tool is in the unlocked position. [0007J In one embodiment, a liner string includes a LHA and a LHDA. The LHDA includes a running tool releasably attached to the LHA. The running tool includes a tubular body having a bore, the tubular body having a first port and a second port in fluid communication with the bore. The running tool further includes a piston assembly including a piston sleeve having an opening, wherein the piston sleeve is moveable from a closed position to an open position, and a seal assembly disposed between the first port and the second port, the seal assembly configured to block the opening when the piston sleeve is in the closed position. The liner string further includes a chamber formed between the LHA and LHDA, wherein the chamber is isolated from fluid communication with the bore when the piston sleeve is in the closed position, and is in fluid communication with the bore when the piston sleeve is in the open position. rooosJ In one embodiment, a method of operating a liner string includes deploying a liner string comprising a LHDA attached to a LHA into a wellbore, wherein a chamber is disposed between the LHDA and LHA and is isolated from a central bore of the LHDA. The method further includes actuating a running tool of the LHDA to open a flow path between the chamber and the central bore. The 2 Date Rec;ue/Date Received 2022-09-27 method further includes increasing pressure in the chamber to set a liner hanger of the LHA after actuating the running tool. BRIEF DESCRIPTION OF THE DRAWINGS [0009] So that the manner in which the above recited features of the present disclosure can be understood in detail, a more particular description of the disclosure, briefly summarized above, may be had by reference to embodiments, some of which are illustrated in the appended drawings. It is to be noted, however, that the appended drawings illustrate only exemplary embodiments and are therefore not to be considered limiting of its scope, may admit to other equally effective embodiments. [0010] Figure 1 illustrates a cross sectional view of a liner string having a liner hanger deployment assembly and a liner hanger assembly. [0011] Figure 2 illustrates the portion of the liner string within the circled region in Figure 1 labeled Figure 2. Fi