US-12624608-B1 - Running tool for tubing hanger

US12624608B1US 12624608 B1US12624608 B1US 12624608B1US-12624608-B1

Abstract

A running tool for a tubing hanger relates to the field of the tubing hanger salvage technology, the running tool includes a body, a first piston is movably provided on the body, and the first piston is provided with a first abutting portion; a second piston is movably provided on the body, on one side of the second piston, a second abutting portion, a first stopping portion, and a first docking piece cooperating with the tubing hanger are sequentially provided along a first direction; the first docking piece is positioned on a moving track of the triggering portion; a second stopping portion is positioned on a moving track of the first stopping portion. The first stopping portion and the second stopping portion cooperate to form a stopping pair.

Inventors

Xiaotao Yu
Kun Li
Zhongfei Sui
Tao Wang
Juliang Ge
Huaguo Liu
Xu Chen
Wuhai Wang
Xiaoxiao Guo
Zhiqiang Zhang

Assignees

WEFIC OCEAN EQUIPMENT MANUFACTURING CO., LTD.

Dates

Publication Date: 20260512
Application Date: 20250808
Priority Date: 20250121

Claims (9)

1 . A running tool for a tubing hanger, wherein the running tool comprises a body, and the body is sequentially provided with a first piston, a second piston, and a second stopping portion; the first piston is movably provided on the body, the first piston is sequentially provided with a first abutting portion, a second abutting portion and a triggering portion along a first direction; the second piston is movably provided on the body, the second piston is movably fitted with the first piston, the second piston is sequentially provided with a third abutting portion, a fourth abutting portion, a first stopping portion, and a first docking piece along the first direction; the fourth abutting portion and the first stopping portion are positioned on one side of the second piston close to the body, the first docking piece is positioned on one side of the second piston far away from the body, the third abutting portion is positioned on a moving track of the first abutting portion along the first direction, and the fourth abutting portion is positioned on a moving track of the second abutting portion along a second direction; a distance between the first abutting portion and the third abutting portion is not less than a distance between the disengaging position and the triggering position, the distance between the second abutting portion and the fourth abutting portion is greater than the distance between a disengaging position and a triggering position, and the first docking piece is positioned on a moving track of the triggering portion; the second stopping portion is positioned on a moving track of the first stopping portion along the first direction; if the running tool needs to be docked with the tubing hanger, a first acting force drives the first piston to move toward the first direction, and after the triggering portion reaches the triggering position, the first acting force passes through the first abutting portion, and the second abutting portion drives the second piston to move toward the first direction until the first docking piece reaches a docking position, and the first stopping portion and the second stopping portion form a stopping pair; then, a second acting force drives the first piston to move toward the second direction until the triggering portion reaches the disengaging position, and the first docking piece moves toward a direction close to the tubing hanger under a third acting force to form docking with the tubing hanger; wherein, the first direction is arranged from the first piston toward the tubing hanger; the first direction and the second direction are opposite; the disengaging position and the triggering portion are sequentially arranged along the first direction, if the triggering portion reaches the disengaging position, the first docking piece and the tubing hanger form docking or interference, and if the triggering portion reaches the triggering position, the first docking piece and the tubing hanger are arranged in an avoiding way under action of the triggering portion.
2 . The running tool for a tubing hanger according to claim 1 , wherein the running tool further comprises a first driving piece and a second driving piece, the first driving piece can apply the first acting force to the first piston, and the second driving piece can apply the second acting force to the first piston.
3 . The running tool for a tubing hanger according to claim 2 , wherein the first driving piece comprises a first channel provided on the body and a first driving portion provided on the first piston, and two ends of the first channel are respectively communicated with an external working medium source and the first driving portion; the second driving piece comprises a second channel provided on the body and a second driving portion provided on the second piston, and two ends of the second channel are respectively communicated with the external working medium source and the second driving portion; the first driving portion and the second driving portion are arranged independently.
4 . The running tool for a tubing hanger according to claim 3 , wherein the body is provided with a separation assembly, and the separation assembly is positioned between the first driving portion and the second driving portion; the running tool further comprises a third driving piece that applies a force to the second piston toward the first direction if the triggering portion reaches the disengaging position.
5 . The running tool for a tubing hanger according to claim 3 , wherein the tubing hanger comprises a base body, a triggering piece and a second docking piece are sequentially provided on the base body from a third direction, the triggering piece is movably provided on the base body; one end of the triggering piece close to the running tool is provided with a first docking portion fitted with the first docking piece, and the second docking piece is positioned on a moving track of the triggering piece; if the first driving piece drives the second piston to move toward the first direction, the triggering piece moves toward a direction close to the second docking piece, and the triggering piece locks the second docking piece with the subsea tree; the third direction is a direction in which the body faces the subsea tree.
6 . The running tool for a tubing hanger according to claim 1 , wherein the body is sequentially provided with a first positioning portion and a second positioning portion along the first direction; the first positioning portion is positioned on a side of the first piston away from the first direction, the first positioning portion is positioned on a moving track of the first piston; and the second positioning portion is positioned on a side of the second piston facing the first direction, the second positioning portion is positioned on a moving track of the second piston.
7 . The running tool for a tubing hanger according to claim 1 , wherein the first piston comprises an external piston, a driving ring and a nesting ring which are sequentially arranged along the first direction, the nesting ring, the driving ring and the external piston are sequentially arranged from a direction close to the body toward a direction away from the body; the driving ring is respectively in threaded connection with the external piston and the nesting ring, the external piston and the nesting ring are in slide fit with the body; and/or, the running tool comprises a sealing assembly which comprising a first sealing piece positioned between the body and the first piston, and a second sealing piece positioned between the body and the second piston; and/or the first docking piece is a unitary structure.
8 . The running tool for a tubing hanger according to claim 1 , wherein the first piston and the second piston are coaxially arranged with the body; the running tool further comprises a detection assembly provided on the body, the detection assembly is used for detecting inclination angles between the first piston, the second piston and the body; guide pieces are provided between both the first piston and the second piston and the body, and the guide piece is arranged along the first direction.
9 . The running tool for a tubing hanger according to claim 8 , wherein the guide piece comprises a guide rail arranged along the first direction; and/or the guide piece comprises a balance cavity provided on one side of the first piston away from the body, and the balance cavity is communicated with an external pressure source.

Description

CROSS-REFERENCE TO RELATED APPLICATION This patent application claims the benefit and priority of Chinese Patent Application No. 202510093438.7, entitled “RUNNING TOOL FOR TUBING HANGER” filed with the China National Intellectual Property Administration on Jan. 21, 2025, the disclosure of which is incorporated by reference herein in its entirety as part of the present application. TECHNICAL FIELD The present disclosure relates to the field of the tubing hanger salvage technology, in particular to a running tool for a tubing hanger. BACKGROUND The tubing hanger is one of the indispensable equipment in the process of the oil drilling and the oil extraction. Its main function is to support the tubing string, seal the annular space between the tubing and the casing, and provide a transition for connecting the lower casing head to the upper subsea tree. In the prior art, during the process of lowering the tubing hanger and retrieval the tubing hanger, it is common for the tubing hanger to disengage from the lowering tool. If the tubing hanger disengages from the lowering tool, it will cause the tubing to fall off due to loss of support, resulting in damage to the tubing and even the ejection of the crude oil and other liquids, polluting the surrounding environment and injuring operators. Therefore, how to ensure the stable connection between the tubing hanger and the running tool during the lowering process and/or the retrieval process, and avoid the disengagement of the tubing hanger during the lowering process and the retrieval process, has become an urgent technical problem to be solved by those skilled in the art. SUMMARY The objectives of the present disclosure is to provide a running tool for a tubing hanger, which ensures stable connection between the tubing hanger and the running tool during the lowering process and/or the retrieval process, avoiding the problem of the tubing hanger disengaging from the running tool during lowering process and the retrieval process and causing accidents. In order to achieve the above objectives, the present disclosure adopts the following technical solutions. The running tool for a tubing hanger provided by the present disclosure includes a body, wherein the body is sequentially provided with a first piston, a second piston, and a second stopping portion. The first piston is movably provided on the body, the first piston is sequentially provided with a first abutting portion, a second abutting portion and a triggering portion along the first direction. The second piston is movably provided on the body, the second piston is movably fitted with the first piston, the second piston is sequentially provided with a third abutting portion, a fourth abutting portion, a first stopping portion, and a first docking piece along the first direction. The fourth abutting portion and the first stopping portion are positioned on one side of the second piston close to the body, the first docking piece is positioned on one side of the second piston far away from the body, the third abutting portion is positioned on a moving track of the first abutting portion along the first direction, and the fourth abutting portion is positioned on a moving track of the second abutting portion along the second direction. The distance between the first abutting portion and the third abutting portion is not less than the distance between the disengaging position and the triggering position, the distance between the second abutting portion and the fourth abutting portion is greater than the distance between the disengaging position and the triggering position, and the first docking piece is positioned on a moving track of the triggering portion. The second stopping portion is positioned on a moving track of the first stopping portion along the first direction. If the running tool needs to be docked with the tubing hanger, a first acting force drives the first piston to move toward the first direction, and after the triggering portion reaches the triggering position, the first acting force passes through the first abutting portion, and the second abutting portion drives the second piston to move toward the first direction until the first docking piece reaches the docking position, and the first stopping portion and the second stopping portion form a stopping pair; then, a second acting force drives the first piston to move toward a second direction until the triggering portion reaches the disengaging position, and the first docking piece moves toward the direction close to the tubing hanger under a third acting force to form docking with the tubing hanger. Wherein, the first direction is arranged from the first piston toward the tubing hanger; the first direction and the second direction are opposite. The disengaging position and the triggering portion are sequentially arranged along the first direction, if the triggering portion reaches the disengaging position, the first docking piece and the tubing hanger