A running tool for a tubing hanger

Abstract

This invention discloses a tool for sending in a tubing hanger, relating to the field of tubing hanger retrieval technology. The tool includes a body, a first piston movably mounted on the body, and a first abutment portion on the first piston; a second piston movably mounted on the body, and a second abutment portion, a first stop portion, and a first docking member cooperating with the tubing hanger are sequentially provided along a first direction on the side of the second piston away from the body. The first docking member is located on the movement trajectory of the trigger portion; the second stop portion is located on the movement trajectory of the first stop portion. The first stop portion and the second stop portion cooperate, which allows the second stop portion to form a stop pair with the first stop portion, and the first docking member to maintain stable docking with the tubing hanger, thereby preventing the first docking member from detaching from the tubing hanger. This ensures a stable connection between the tool and the tubing hanger during the sending and / or lowering of the tubing hanger, reducing equipment losses caused by the tubing hanger detaching from the tool.

Description

Technical Field

[0001] The invention relates to the technical field of oil pipe hanger fishing, in particular to a running tool for an oil pipe hanger. Background Art

[0002] The tubing hanger is one of the indispensable equipment in the process of oil drilling and oil production. Its main function is to support the tubing string and seal the annular space between the tubing and the casing, while providing a transition for the casing head and the Christmas tree.

[0003] In the prior art, during the lowering and recovery process of the tubing hanger, the tubing hanger and the lowering tool often become detached. If the tubing hanger becomes detached from the lowering tool, the tubing will lose support and fall off, causing damage to the tubing, and even causing crude oil and other liquids to spray out, polluting the surrounding environment and injuring operators.

[0004] Therefore, how to ensure the stable connection between the tubing hanger and the running tool during the lowering and / or recovery process and prevent the tubing hanger from being separated during the lowering and recovery process has become a technical problem that technical personnel in this field need to solve urgently. Summary of the invention

[0005] The object of the present invention is to provide a running tool for a tubing hanger to ensure that the tubing hanger and the running tool can maintain a stable connection during the lowering and / or recovery process, thereby avoiding the problem that the tubing hanger is separated from the running tool during the lowering and recovery process, causing an accident.

[0006] To achieve the above object, the present invention provides the following solutions:

[0007] The present invention provides a running tool for a tubing hanger, the running tool comprising a body, and the body is provided with:

[0008] A first piston, the first piston is movably disposed on the body, and a first abutting portion, a second abutting portion and a triggering portion are sequentially disposed on the first piston along the first direction;

[0009] a second piston, the second piston is movably arranged on the body, the second piston is movably matched with the first piston, a third abutting portion, a fourth abutting portion, a first stop portion, and a first docking piece are sequentially arranged on the second piston along the first direction, the fourth abutting portion and the first stop portion are located on a side of the second piston close to the body, the first docking piece is located on a side of the second piston away from the body, the third abutting portion is located on a movement trajectory of the first abutting portion along the first direction, the fourth abutting portion is located on a movement trajectory 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 disengagement position and the triggering position, the distance between the second abutting portion and the fourth abutting portion is greater than the distance between the disengagement position and the triggering position, and the first docking piece is located on the movement trajectory of the triggering portion;

[0010] a second stopper, the second stopper being located on a movement track of the first stopper along the first direction;

[0011] When the running tool needs to dock with the tubing hanger, the first force drives the first piston to move in the first direction. After the trigger part reaches the trigger position, the first force passes through the first abutment part, and the second abutment part drives the second piston to move in the first direction until the first docking member reaches the docking position, and the first stop part and the second stop part form a stop pair; then, the second force drives the first piston to move in the second direction until the trigger part reaches the disengagement position, and the first docking member moves in the direction close to the tubing hanger under the third force to dock with the tubing hanger;

[0012] Among them, the first direction is set from the first piston toward the oil pipe hanger; the first direction is opposite to the second direction; the disengagement position and the trigger position are sequentially set along the first direction, when the trigger part reaches the disengagement position, the first docking part and the oil pipe hanger are docked or interfered, and when the trigger part reaches the trigger position, under the action of the trigger part, the first docking part and the oil pipe hanger are avoided.

[0013] Preferably, the running tool further comprises a first driving member and a second driving member, the first driving member can apply the first force to the first piston, and the second driving member can apply the second force to the first piston.

[0014] Preferably, the first driving member comprises a first channel provided on the body, and a first driving portion provided on the first piston, and both ends of the first channel are respectively connected to an external working medium source and the first driving portion;

[0015] The second driving member includes a second channel provided on the body and a second driving part provided on the second piston, and both ends of the second channel are respectively connected to the external working medium source and the second driving part;

[0016] The first driving part and the second driving part are independently provided.

[0017] Preferably, a partition assembly is provided on the body, and the partition assembly is located between the first driving part and the second driving part;

[0018] The running tool further includes a third driving member, and when the trigger portion reaches the disengagement position, the third driving member applies a force in the first direction to the second piston.

[0019] Preferably, the tubing hanger comprises a base, on which a triggering member and a second docking member are sequentially arranged from a third direction, the triggering member is movably arranged on the base, an end of the triggering member close to the running tool is provided with a first docking portion matched with the first docking member, and the second docking member is located on the movement track of the triggering member;

[0020] When the first driving member drives the second piston to move in the first direction, the trigger member moves in a direction close to the second docking member, and the trigger member enables the second docking member to be locked with the Christmas tree; the third direction is the direction of the body toward the Christmas tree.

[0021] Preferably, a first positioning portion and a second positioning portion are sequentially provided on the main body along the first direction, the first positioning portion is located on the side of the first piston away from the first direction, the first positioning portion is located on the movement trajectory of the first piston, the second positioning portion is located on the side of the second piston facing the first direction, and the second positioning portion is located on the movement trajectory of the second piston.

[0022] Preferably, the first piston comprises an outer piston, a drive ring and a nested ring arranged in sequence along a first direction, the nested ring, the drive ring and the outer piston are arranged in sequence from a direction close to the body to a direction away from the body, the drive ring is threadedly connected to the outer piston and the nested ring respectively, and the outer piston and the nested ring are both slidably matched with the body;

[0023] And / or, the running tool comprises a sealing assembly, the sealing assembly comprises a first sealing member disposed between the body and the first piston, and a second sealing member disposed between the body and the second piston;

[0024] And / or, the first docking member is an integral structure.

[0025] Preferably, the first piston and the second piston are both coaxially arranged with the body; the delivery tool also includes a detection component arranged on the body, and the detection component is used to detect the inclination angle between the first piston, the second piston and the body; a guide is provided between the first piston, the second piston and the body, and the guide is arranged along the first direction.

[0026] Preferably, the guide member comprises a guide rail arranged along the first direction; and / or, the guide member comprises a balancing chamber arranged on a side of the first piston away from the body, and the balancing chamber is connected to an external pressure source.

[0027] Compared with the prior art, the present invention has achieved the following technical effects:

[0028] The feeding tool in the present invention comprises a body, on which the following are arranged in sequence along a first direction: a first piston, the first piston is movably arranged on the body, the first piston is arranged in sequence along the first direction with a first abutting portion, a second abutting portion and a triggering portion, a second piston, the second piston is movably arranged on the body, the second piston is movably matched with the first piston, the second piston is arranged in sequence along the first direction with a third abutting portion, a fourth abutting portion, a first stopper and a first docking piece, the fourth abutting portion and the first stopper are located on a side of the second piston close to the body, the first docking piece is located on a side of the second piston away from the body, the third abutting portion is located on a motion track of the first abutting portion along the first direction, the fourth abutting portion is located on a motion 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 disengagement position and the triggering position, the distance between the second abutting portion and the fourth abutting portion is greater than the distance between the triggering position and the disengagement position, and the first docking piece is located on the motion track of the triggering portion; a second stopper, the second stopper is located on the motion track of the first stopper along the first direction;

[0029] When the running tool needs to dock with the tubing hanger, the first force drives the first piston to move in the first direction. After the trigger part reaches the trigger position, the first force passes through the first abutment part, and the second abutment part drives the second piston to move in the first direction until the first docking part reaches the docking position, and the first stop part and the second stop part form a stop pair; then, the second force drives the first piston to move in the second direction until the trigger part reaches the disengagement position, and the first docking part moves in the direction close to the tubing hanger under the third force to dock with the tubing hanger;

[0030] The first direction is set from the first piston toward the tubing hanger; the first direction is opposite to the second direction; the disengagement position and the trigger position are sequentially set along the first direction, when the trigger part reaches the disengagement position, the first docking piece and the tubing hanger form a docking or interference, when the trigger part reaches the trigger position, under the action of the trigger part, the first docking piece and the tubing hanger are arranged to avoid each other;

[0031] It should be noted that, because the first piston and the second piston are movably matched, the distance between the first abutting portion and the third abutting portion is not less than the distance between the disengaged position and the triggering position, so that before the first piston drives the first docking piece to move in the first direction to the docking position, the first piston can move in the first direction relative to the second piston, so that the triggering portion can move to the triggering position, so that the first docking piece and the tubing hanger are arranged in an avoidance manner; and, because the first piston and the second piston are movably matched, the distance between the second abutting portion and the fourth abutting portion is greater than the distance between the disengaged position and the triggering position, so that after the first docking piece reaches the docking position and the first piston moves to the disengaged position, the first The piston will not drive the first docking piece to move in the second direction, that is, the first piston will not drive the first docking piece to move in the second direction before the first docking piece and the tubing hanger are docked. In this way, the first docking piece can move in the direction of the tubing hanger under the third force to successfully complete the docking. As can be seen from the above, before the running tool in the present invention forms a stable docking with the tubing hanger, the running tool will not move in advance relative to the tubing hanger, which enables the tubing hanger to maintain a stable connection with the running tool during the lowering and / or recovery process, thereby reducing the risk of accidental release, i.e., detachment, causing damage to the tubing, pollution of the surrounding environment, and personal injury. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0033] Figure 1 It is a cross-sectional view of the local structure of the feeding tool;

[0034] Figure 2 A top view of the feeding tool;

[0035] Figure 3 is a schematic diagram of the structure of the delivery tool;

[0036] Figure 4 It is a schematic diagram of the structure when the tubing hanger is not locked with the Christmas tree;

[0037] Figure 5It is a schematic diagram of the structure when the tubing hanger is locked with the Christmas tree;

[0038] Figure 6 It is a schematic diagram of the structure when the running tool is docked with the tubing hanger;

[0039] Figure 7 It is a schematic diagram of the structure when the running tool drives the tubing hanger to move upward;

[0040] Figure 8 It is a structural schematic diagram of the running tool and the tubing hanger being undocking;

[0041] Among them, 1. main body; 2. first piston; 3. first abutment part; 4. second abutment part; 5. trigger part; 6. second piston; 7. third abutment part; 8. fourth abutment part; 9. first stop part; 10. first docking member; 11. second stop part; 12. first driving part; 13. second driving part; 14. trigger part; 15. first docking part; 16. second docking member; 17. first positioning part; 18. second positioning part; 19. outer piston; 20. driving ring; 21. nested ring; 22. first sealing member; 23. stop ring; 24. fixing ring; 25. split ring. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0044] The first direction is set from the first piston 2 to the direction of the tubing hanger; the first direction and the second direction are opposite. The first force is the force applied by the first driving member to the first piston 2. When the feeding tool needs to dock with the tubing hanger, the first driving member applies the first force to the first piston 2. The first force drives the first piston 2 to move in the first direction. After the trigger part 5 reaches the trigger position, the first force passes through the first abutment part 3, and the second abutment part 4 drives the second piston 6 to move in the first direction until the first docking member 10 reaches the docking position, and the first stop part 9 and the second stop part 11 form a stop pair. The second force refers to the force applied by the second driving member to the first piston 2. When the first docking member 10 reaches the docking position, the first stop part 9 and the second stop part 11 form a stop pair; the second force drives the first piston 2 to move in the second direction until the trigger part reaches the disengagement position. The third force refers to the elastic restoring force of the first docking member 10 itself.

[0045] like Figure 1 to Figure 8 As shown, the present invention discloses a running tool for a tubing hanger, the running tool comprising a body 1, on which the following are arranged in sequence along a first direction: a first piston 2, the first piston 2 being movably arranged on the body 1, on which the first piston 2 is arranged in sequence along the first direction: a first abutment portion 3, a second abutment portion 4 and a trigger portion 5; a second piston 6, the second piston 6 being movably arranged on the body 1, the second piston 6 being movably matched with the first piston 2, on which the third abutment portion 7, a fourth abutment portion 8, a first stop portion 9 and a first docking member 10 are arranged in sequence along the first direction, the fourth abutment portion 8 and the first stop portion 9 being located on the second piston 6 On the side close to the body 1, the first docking member 10 is located on the side of the second piston 6 away from the body 1, the third abutting portion 7 is located on the movement trajectory of the first abutting portion 3 along the first direction, the fourth abutting portion 8 is located on the movement trajectory of the second abutting portion 4 along the second direction, the distance between the first abutting portion 3 and the third abutting portion 7 is not less than the distance between the disengaged position and the triggering position, the distance between the second abutting portion 4 and the fourth abutting portion 8 is greater than the distance between the disengaged position and the triggering position, and the first docking member 10 is located on the movement trajectory of the triggering portion 5; the second stop portion 11, the second stop portion 11 is located on the movement trajectory of the first stop portion 9 along the first direction;

[0046] No matter when the running tool is lowered or the tubing hanger is recovered, the running tool needs to be docked with the tubing hanger (docking can be understood as connection), and when the running tool needs to be docked with the tubing hanger, the first force drives the first piston 2 to move in the first direction, and after the trigger part 5 reaches the trigger position, the first force passes through the first abutment part 3, and the second abutment part 4 drives the second piston 6 to move in the first direction until the first docking part 10 reaches the docking position, and the first stop part 9 and the second stop part 11 form a stop pair; then, the second force drives the first piston 2 to move in the second direction Move until the trigger part 5 reaches the disengaged position, and the first docking piece 10 moves towards the direction close to the tubing hanger under the third force to dock with the tubing hanger; wherein the first direction is set from the first piston 2 towards the tubing hanger; the first direction is opposite to the second direction; the disengaged position and the trigger position are sequentially set along the first direction, and when the trigger part 5 reaches the disengaged position, the first docking piece 10 docks with or interferes with the tubing hanger, and when the trigger part 5 reaches the trigger position, under the action of the trigger part 5, the first docking piece 10 avoids the tubing hanger.

[0047] It should be noted that, because the first piston 2 and the second piston 6 are movably matched, the distance between the first abutting portion 3 and the third abutting portion 7 is not less than the distance between the disengaged position and the triggering position, so that before the first piston 2 drives the first docking piece 10 to move in the first direction to the docking position, the first piston 2 can move in the first direction relative to the second piston 6, so that the triggering portion 5 can move to the triggering position, so that the first docking piece 10 and the first docking portion 15 of the tubing hanger are arranged in an avoidance manner; and, because the first piston 2 and the second piston 6 are movably matched, the distance between the second abutting portion 4 and the fourth abutting portion 8 is greater than the distance between the disengaged position and the triggering position, so that after the first docking piece 10 reaches the docking position and the first piston 2 moves When the first piston 2 moves to the disengaged position, the first piston 2 will not drive the first docking member 10 to move in the second direction, that is, the first piston 2 will not drive the first docking member 10 to move in the second direction before the first docking member 10 is docked with the tubing hanger. In this way, the first docking member 10 can move in the direction of the tubing hanger under the third force to successfully complete the docking. It can be seen from the above that before the running tool in the present invention forms a stable docking with the tubing hanger, the running tool will not move in advance relative to the tubing hanger, which enables the tubing hanger to maintain a stable connection with the running tool during the lowering and / or recovery process, thereby reducing the risk of accidental release, i.e., detachment, causing damage to the tubing, pollution of the surrounding environment, and personal injury.

[0048] In the present invention, the main body 1 can be a tubular structure, i.e., a cylindrical structure, to adapt to the shape of the tubing hanger and the Christmas tree; or, if it can meet the needs of salvaging the tubing hanger, the main body 1 can also choose other shapes. The trigger position is the position of the trigger part 5 when the trigger part 5 makes the first docking part 10 and the first docking part 15 of the tubing hanger avoid the setting. The disengagement position is the position of the trigger part 5 when the trigger part 5 releases the force on the first docking part 10 and the first docking part 10 can rebound under its own action. The longitudinal section of the first abutment part 3 and the third abutment part 7 is a step-like structure, and the first abutment part 3 and the third abutment part 7 are L-shaped in the lower half, upper half or lower half of the longitudinal section, which reduces the design of a single piston and simplifies the complexity of the overall delivery tool. Figure 2 Shown are the first channel, the second channel, and the third channel, which are connected to the inlet of the external working medium source.

[0049] The first docking member 10 can be a structural member with elasticity, and the third force refers to the elastic restoring force of the first docking member 10 itself; when the trigger part 5 moves to the trigger position, the trigger part 5 compresses the first docking member 10 toward the side close to the body 1, so that the outer diameter of the body 1 area where the first docking member 10 is located and the first docking member 10 is smaller than the inner diameter of the tubing hanger, so that the first docking member 10 can smoothly enter the tubing hanger and reach the docking position along the first direction to complete the docking with the docking part of the tubing hanger. Figure 1 to Figure 8 As shown, the first docking piece 10 is an integral structure. Compared with the split structure, the strength and stability of the first docking piece 10 are improved, the safety factor of the downhole tubing hanger operation is enhanced, and then the first docking piece 10 is reduced due to the low strength of the split first docking piece 10. When the oil well is inclined at a large angle, the first docking piece 10 is subjected to stress deformation or even fracture, resulting in the failure of the recovery of the underwater tubing hanger or serious accidents such as slipping during the recovery process. The first docking piece 10 can be specifically an open C-shaped ring. It should be noted that the shape of the first docking piece 10 is not limited to the above content, and the shape that can meet the functions of the first docking piece 10 defined above is also acceptable.

[0050] The first piston 2 and the second piston 6 are movably arranged on the body 1, and the second piston 6 is movably matched with the first piston 2, which means that after the running tool is aligned with the tubing hanger, the Christmas tree and other equipment, there is no need to move the body 1 again. The first piston 2 and the second piston 6 on the body 1 can be moved to complete the locking and unlocking of the tubing hanger and the Christmas tree, thereby reducing the loss of the body 1 and the Christmas tree due to frequent movement of the body 1, reducing the alignment accuracy of the body 1 and the Christmas tree, and the installation accuracy of the tubing hanger.

[0051] The first piston 2 may be an integral structure, or the first piston 2 may be a split structure. Figure 1 to Figure 8As shown, at this time, the first piston 2 includes an outer piston 19, a drive ring 20 and a nested ring 21 which are arranged in sequence along a first direction; the nested ring 21, the drive ring 20 and the outer piston 19 are arranged in sequence from a direction close to the main body 1 to a direction away from the main body 1, the drive ring 20 is threadedly connected to the outer piston 19 and the nested ring 21 respectively, the outer piston 19 and the nested ring 21 are both slidably matched with the main body 1 in the first direction, the nested ring 21 is located between the main body 1 and the second piston 6, and the nested ring 21 and the second piston 6 are also slidably matched.

[0052] The first abutment portion 3 and the second abutment portion 4 are corresponding areas on the first piston 2. When the first piston 2 includes an outer piston 19, a drive ring 20 and a nesting ring 21, the first abutment portion 3 is located on the side of the drive ring 20 facing the second piston 6, and the second abutment portion 4 is located on the side of the nesting ring 21 facing the second piston 6. The third abutment portion 7 and the fourth abutment portion 8 are corresponding areas on the second piston 6. Figure 1 to Figure 8 As shown, the second abutment portion 4 and the third abutment portion 7 are corresponding areas on the second piston 6 .

[0053] The first stopper 9 and the second stopper 11 can be a combination of a protrusion and a groove, such as Figure 1 to Figure 8 As shown, a protrusion is provided on the body 1, and a groove matching with the protrusion is provided on the side of the second piston 6 facing the body 1, and a guide surface is provided on the groove and the protrusion, so that the protrusion and the groove can smoothly switch between the two states of disengagement and forming a stop pair; an elastic member can also be provided between the protrusion and the body 1, so that when the groove reaches the protrusion, the protrusion can automatically enter the groove under the action of the elastic member to form a stop pair. The stop pair can be understood as the second stop part 11 restricting the movement of the first stop part 9, and then restricting the movement of the second piston 6 relative to the body 1. It should be noted that the setting of the first stop part 9 and the second stop part 11 is not limited to the cooperation of the protrusion and the groove, and other structures that can play a stopping role are also acceptable.

[0054] like Figure 1 to Figure 8 As shown, the body 1 is provided with a first positioning portion 17 and a second positioning portion 18 in sequence along the first direction. The first positioning portion 17 is located on the side of the first piston 2 away from the first direction, and the first positioning portion 17 is located on the movement trajectory of the first piston 2. The second positioning portion 18 is located on the side of the second piston 6 facing the first direction, and the second positioning portion 18 is located on the movement trajectory of the second piston 6. The first positioning portion 17 and the second positioning portion 18 can be specifically protrusions provided on the body 1. The first positioning portion 17 prevents the first piston 2 from moving excessively in the first direction, ensuring the smooth operation of the first piston 2 during the process of lowering and recovering the tubing hanger; the second positioning portion 18 prevents the second piston 6 from moving excessively in the second direction, reducing the overexcitation of the second docking piece 16, and ensuring the subsequent smooth locking of the second docking piece 16 with the Christmas tree.

[0055] The delivery tool in the present invention further includes a first driving member and a second driving member, the second driving member can apply a first force to the first piston 2, and the third driving member can apply a second force to the first piston 2. The second driving member and the third driving member can be driving devices such as hydraulic cylinders or electric cylinders, but it should be noted that a cavity for accommodating the above-mentioned driving devices must be provided on the delivery tool, and the cavity must be well sealed to prevent external impurities such as seawater from entering the driving device.

[0056] Alternatively, the first driving member and the second driving member may not use the above-mentioned driving device. Figure 1 to Figure 8 As shown, the first driving member includes a first channel provided on the body 1, and a first driving part 12 provided on the first piston 2, and the two ends of the first channel are respectively connected to the external working medium source and the first driving part 12; the second driving member includes a second channel provided on the body 1, and a second driving part 13 provided on the second piston 6, and the two ends of the second channel are respectively connected to the external working medium source and the second driving part 13; the first driving part 12 and the second driving part 13 are independently arranged.

[0057] When the first force is to be applied to the first piston 2, the external working medium source injects the working medium into the second channel, and the working medium pushes the first piston 2 to move in the first direction; similarly, when the second force is to be applied to the first piston 2, the external working medium source injects the working medium into the first channel, and the working medium pushes the first piston 2 to move in the second direction. The first drive part 12 and the second drive part 13 are grooves for accommodating the working medium. The working medium can specifically be a medium such as hydraulic oil that can drive the first piston 2 to move and will not cause significant damage to the first piston 2 and the body 1. The external working medium source is equipped with a corresponding delivery pump to smoothly deliver the working medium to the first drive part 12 or the second drive part 13.

[0058] The first drive unit 12 and the second drive unit 13 are independently arranged, which means that the working media in the first channel and the second channel will not interfere with each other. The first drive unit 12 and the second drive unit 13 are independently arranged, which can be achieved by the arrangement of the first drive unit 12 or the second drive unit 13, for example, a protrusion is arranged on the body 1 between the first drive unit 12 and the second drive unit 13, so that the protrusion separates the first drive unit 12 and the second drive unit 13, and the working media in the first channel and the second channel will not interfere with each other; or, the side of the first drive unit 12 close to the second drive unit 13 can be arranged in close contact with the body 1, and / or the side of the second drive unit 13 close to the first drive unit 12 can be arranged in close contact with the body 1, so that the mutual interference between the first channel and the second channel is also avoided.

[0059] like Figure 1 to Figure 8As shown, a separation component is provided on the main body 1, and the separation component is located between the first driving part 12 and the second driving part 13. The separation component includes a stop ring 23 and a fixing ring 24 arranged in sequence along the first direction, the stop ring 23 is fixed on the main body 1, and a split ring 25 is embedded between the fixing ring 24 and the main body 1, and the split ring 25 includes a plurality of protrusions; in this way, the separation of the first channel and the second channel is achieved by the split ring 25, the fixing ring 24 and the split ring 25.

[0060] Furthermore, the delivery tool also includes a third driving member, and when the trigger portion 5 reaches the disengaged position, the third driving member applies a force in the first direction to the second piston 6. When the trigger portion 5 reaches the disengaged position, the first piston 2 cannot continue to move in the first direction due to the separation component, so the third driving member can apply a force in the first direction to the second piston 6, which enhances the stopping force of the first docking member 10 before completing the docking with the first docking portion 15, making it more difficult for the first docking member 10 to be driven by the first piston 2 to move in the first direction before docking with the first docking portion 15 of the tubing hanger, further ensuring the stability of the docking between the tubing hanger and the delivery tool. The third driving member can specifically be a linear driving device such as a hydraulic cylinder or an electric push rod. At this time, it should be noted that the third driving member is arranged in a sealed cavity to prevent external media such as seawater from entering and affecting the movement of the third driving member. Or, as Figure 1 to Figure 8 As shown, the first driving member may also include a third channel provided on the main body 1, the first end of the third channel is connected to an external working medium source, and the second end of the third channel is connected to an area between the first abutting portion 3 and the second abutting portion 4. At this time, when the first docking member 10 and the first docking portion 15 are docked, the external working medium source injects working medium into the first channel, and the working medium exerts a force on the second piston 6 ring in the second direction.

[0061] And / or, the running tool includes a sealing assembly, the sealing assembly includes a first sealing member 22 provided between the body 1 and the first piston 2, and a second sealing member provided between the body 1 and the second piston 6. The first sealing member 22 and the second sealing member may specifically be sealing rings. In addition to providing sealing members at the above-mentioned positions, the present invention also provides sealing members between multiple structures to ensure the sealing performance of the running tool.

[0062] like Figure 1 to Figure 8As shown, the tubing hanger includes a base body, on which a triggering member 14 and a second docking member 16 are arranged in sequence from the third direction. The triggering member 14 is movably arranged on the base body, and the end of the triggering member 14 close to the running tool is provided with a first docking portion 15 matched with the first docking member 10, and the second docking member 16 is located on the movement track of the triggering member 14; when the first driving member drives the second piston 6 to move in the first direction, the triggering member 14 moves in the direction close to the second docking member 16, and the triggering member 14 makes the second docking member 16 and the Christmas tree complete the locking; the third direction is the direction of the body 1 toward the Christmas tree. The second docking member 16 is a structure with elastic restoring force. When the triggering member 14 reaches the corresponding position of the second docking member 16, the second docking member 16 is pushed outward by the triggering member 14 to complete the locking with the Christmas tree. When the triggering member 14 moves in the direction away from the Christmas tree, the triggering member 14 retracts in the direction close to the base body under its own elastic force, and releases the locking with the Christmas tree.

[0063] In addition, the first piston 2, the second piston 6, the Christmas tree, and the tubing hanger are all coaxially arranged with the body 1, which ensures the accuracy of lowering and installing the tubing hanger; the delivery tool also includes a detection component arranged on the body 1, the detection component is used to detect the inclination angle between the first piston 2, the second piston 6 and the body 1, and the detection component can be specifically an angle sensor. When the operator or the controller connected to the detection component signal finds through the feedback of the detection component that the first piston 2 or the second piston 6 is tilted relative to the body 1, the posture of the first piston 2 and the second piston 6 is adjusted in time through auxiliary equipment to prevent the first piston 2 or the second piston 6 from moving on the body 1 in an inclined posture, resulting in the first piston 2 or the second piston 6 being stuck with the body 1, and unable to achieve docking with the tubing hanger, or the problem of releasing the docking; a guide is provided between the first piston 2, the second piston 6 and the body 1, and the guide is arranged along the first direction. The guide may include a guide rail arranged along the first direction, and a multi-section guide is provided on the body 1. A guide rail is provided on the side of the body 1 away from the tubing hanger, and the first guide rail and the first piston 2 are slidably matched in the first direction. A second guide rail is provided on the side of the body 1 close to the tubing hanger, and the second guide rail and the second piston 6 are slidably matched in the first direction; and / or, the guide member includes a balancing chamber provided on the side of the first piston 2 and / or the second piston 6 away from the body 1, the balancing chamber is connected to the external pressure source, and a plurality of balloons are provided along the circumference of the first piston 2 and the second piston 6. The balancing chamber refers to a balloon chamber. When the detection component detects that the first piston 2 and / or the second piston 6 are tilted relative to the body 1, the balloon pressure on the side opposite to the tilting direction of the first piston 2 and / or the second piston 6 is increased by the external pressure source, so that the first piston 2 and / or the second piston 6 are restored to coaxiality with the body 1. The external pressure source can be a device storing liquid or gas, and the liquid or gas is flushed into or discharged from the balloon chamber by a delivery pump to adjust the posture of the first piston 2 and / or the second piston 6.

[0064] In the present invention, the second piston 6, the outer piston 19, the drive ring 20, the nested ring 21, the stop ring 23, and the fixed ring 24 are all annular structures; however, the second piston 6, the outer piston 19, the drive ring 20, the nested ring 21, the stop ring 23, and the fixed ring 24 are not limited to annular structures, and other shapes that can achieve the functions specified above in the above structures are also acceptable.

[0065] In this article, and / or means that in the same sentence, the text content before and / or and the text content after and / or can exist at the same time or separately; for example, A and / or B includes the situation where only A or B exists, and the situation where both A and B exist at the same time. The meaning of and / or is the same as that of and / or, and will not be repeated here.

[0066] The present invention discloses multiple technical solutions, but does not provide any contrary technical inspiration.

[0067] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A running tool for a tubing hanger, characterized in that: The running tool comprises a body, on which are arranged in sequence along a first direction: A first piston, the first piston is movably disposed on the body, and a first abutting portion, a second abutting portion and a triggering portion are sequentially disposed on the first piston along the first direction; a second piston, the second piston is movably arranged on the body, the second piston is movably matched with the first piston, a third abutting portion, a fourth abutting portion, a first stop portion, and a first docking piece are sequentially arranged on the second piston along the first direction, the fourth abutting portion and the first stop portion are located on a side of the second piston close to the body, the first docking piece is located on a side of the second piston away from the body, the third abutting portion is located on a movement trajectory of the first abutting portion along the first direction, the fourth abutting portion is located on a movement trajectory 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 disengagement position and the triggering position, the distance between the second abutting portion and the fourth abutting portion is greater than the distance between the disengagement position and the triggering position, and the first docking piece is located on the movement trajectory of the triggering portion; a second stopper, the second stopper being located on a movement track of the first stopper along the first direction; When the running tool needs to dock with the tubing hanger, the first force drives the first piston to move in the first direction. After the trigger part reaches the trigger position, the first force passes through the first abutment part, and the second abutment part drives the second piston to move in the first direction until the first docking member reaches the docking position, and the first stop part and the second stop part form a stop pair; then, the second force drives the first piston to move in the second direction until the trigger part reaches the disengagement position, and the first docking member moves in the direction close to the tubing hanger under the third force to dock with the tubing hanger; Among them, the first direction is set from the first piston toward the oil pipe hanger; the first direction is opposite to the second direction; the disengagement position and the trigger position are sequentially set along the first direction, when the trigger part reaches the disengagement position, the first docking part and the oil pipe hanger are docked or interfered, and when the trigger part reaches the trigger position, under the action of the trigger part, the first docking part and the oil pipe hanger are avoided.

2. The running tool according to claim 1, characterized in that The running tool further includes a first driving member and a second driving member, wherein the first driving member can apply the first force to the first piston, and the second driving member can apply the second force to the first piston.

3. The running tool according to claim 2, characterized in that The first driving member includes a first channel provided on the body and a first driving portion provided on the first piston, and both ends of the first channel are respectively connected to an external working medium source and the first driving portion; The second driving member includes a second channel provided on the body and a second driving part provided on the second piston, and both ends of the second channel are respectively connected to the external working medium source and the second driving part; The first driving part and the second driving part are independently provided.

4. The running tool according to claim 3, characterized in that The main body is provided with a partition assembly, and the partition assembly is located between the first driving part and the second driving part; The running tool further includes a third driving member, and when the trigger portion reaches the disengagement position, the third driving member applies a force in the first direction to the second piston.

5. The running tool according to claim 3, characterized in that The tubing hanger comprises a base, on which a triggering member and a second docking member are arranged in sequence from a third direction, the triggering member is movably arranged on the base, one end of the triggering member close to the running tool is provided with a first docking portion matched with the first docking member, and the second docking member is located on the movement track of the triggering member; When the first driving member drives the second piston to move in the first direction, the trigger member moves in a direction close to the second docking member, and the trigger member enables the second docking member to be locked with the Christmas tree; the third direction is the direction of the body toward the Christmas tree.

6. The running tool according to claim 1, characterized in that A first positioning portion and a second positioning portion are sequentially provided on the main body along the first direction, the first positioning portion is located on the side of the first piston away from the first direction, the first positioning portion is located on the movement trajectory of the first piston, the second positioning portion is located on the side of the second piston facing the first direction, and the second positioning portion is located on the movement trajectory of the second piston.

7. The running tool according to claim 1, characterized in that The first piston comprises an outer piston, a drive ring and a nested ring arranged in sequence along a first direction, the nested ring, the drive ring and the outer piston are arranged in sequence from a direction close to the body to a direction away from the body, the drive ring is threadedly connected to the outer piston and the nested ring respectively, and the outer piston and the nested ring are both slidably matched with the body; And / or, the running tool comprises a sealing assembly, the sealing assembly comprises a first sealing member disposed between the body and the first piston, and a second sealing member disposed between the body and the second piston; And / or, the first docking member is an integral structure.

8. The running tool according to claim 1, characterized in that The first piston and the second piston are both coaxially arranged with the body; the delivery tool also includes a detection component arranged on the body, and the detection component is used to detect the inclination angle between the first piston, the second piston and the body; a guide is provided between the first piston, the second piston and the body, and the guide is arranged along the first direction.

9. The running tool according to claim 8, characterized in that The guide member includes a guide rail arranged along the first direction; and / or the guide member includes a balance chamber arranged on a side of the first piston away from the body, and the balance chamber is connected to an external pressure source.

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