A torque-transmitting casing hanging and running tool

Abstract

This invention relates to a delivery tool, and more particularly to a torsion-driven sleeve hook delivery tool. It provides a torsion-driven sleeve hook delivery tool that unlocks directly through steel ball pressure, and features a simple structure and convenient operation. The torsion-driven sleeve hook delivery tool includes a sleeve hook, a delivery body, a piston, and a shearing screw. The delivery body is slidably connected inside the sleeve hook, and the piston is placed inside the delivery body. The piston is fixed and locked by the shearing screw. This invention uses a steel ball to pressurize the delivery body, causing the shearing screw to break. The piston slides down and engages with a locking pin, thereby disengaging the delivery body from the sleeve hook and completing its lowering. The steel ball pressure unlocking method is simpler and more convenient to operate.

Description

Technical Field

[0001] This invention relates to a feeding tool, and more particularly to a torque-transmitting sleeve hanging feeding tool. Background Technology

[0002] During deep-sea drilling operations, different drill bits need to be replaced in a timely manner as the strata change. Therefore, in marine drilling, a re-entry cone is generally used to facilitate quick drill bit replacement. To improve drilling efficiency, a casing hanger is usually used in conjunction with the re-entry cone, and the borehole is lowered by power, simplifying the operation process. The current marine drilling tools used are special casing hanger delivery tools for deep-sea oil drilling and production wells. The delivery tools in the field of deep-sea oil drilling and production are generally quite complex in structure. For deep-sea geological drilling holes that do not require high-pressure sealing, it is a case of using overkill. At the same time, the complex structure also increases the workflow and time. After the casing hanger is delivered, it is generally unlocked by rotating a screw to drive the nut to move up and down, which is time-consuming and labor-intensive.

[0003] Therefore, we are now developing a torsion-transmitting sleeve insertion tool that can be directly unlocked by steel ball pressure and has a simple structure and convenient operation. Summary of the Invention

[0004] In order to overcome the shortcomings of existing devices, which are all relatively complex in structure and time-consuming and labor-intensive in unlocking methods, the technical problem is: to provide a torsion-type sleeve insertion tool that can be directly unlocked by steel ball pressure and has a simple structure and convenient operation.

[0005] The technical solution of the present invention is: a torsion-transmitting sleeve hanger feeding tool, comprising a sleeve hanger, a feeding body, a piston, and a shearing screw. The feeding body is slidably connected inside the sleeve hanger, and the piston is placed inside the feeding body. The piston is fixed and locked by the shearing screw.

[0006] Furthermore, the feed body is a stepped cylindrical structure with a central through hole. The two ends of the central hole are tapered female threads, and the bottom of the feed body is hexagonal, which can fit with the hexagonal top of the sleeve hanger, thus enabling the device to achieve circumferential rotation.

[0007] Furthermore, the uppermost part of the piston's outer circle is an outer square, and the piston's outer circle has three sealing rings. The first ring is located at the lower end of the outer square, the second ring is located in the middle part, and the third ring is located at the bottom. After the piston is installed, the three sealing rings are located in the three sealing surfaces of the center hole of the feed body, which can effectively increase the sealing performance.

[0008] Furthermore, it also includes steel balls, with steel balls placed on top of the piston.

[0009] Furthermore, it also includes a drill bit connector, with a threaded connection at the lower part of the feed body.

[0010] Furthermore, it also includes locking pins and anti-rotation sleeves. Both the left and right sides of the feed body are slidably connected to locking pins, and the locking pins can contact the piston. The bottom of the locking pins is connected to an anti-rotation sleeve.

[0011] Furthermore, the locking pin has a cylindrical structure in the middle and a W-shaped arc on one end face, which matches the W-shaped annular groove of the feeding body. The locking pins are all hooked and snapped with the sleeve, and the locking pins can also be snapped with the piston.

[0012] Furthermore, it also includes anti-rotation screws, with anti-rotation screws threadedly connected inside the anti-rotation sleeves.

[0013] The beneficial effects are: 1. The present invention uses a steel ball to pressurize the inserted body, causing the shear screw to break, the piston to slide down and engage with the locking pin, thereby allowing the inserted body to disengage from the sleeve and complete the lowering. The method of using a steel ball to pressurize and unlock is simpler and more convenient to operate.

[0014] 2. This invention enables the feed body to drill together with the casing hanger through hexagonal contact with the casing hanger, and at the same time, it can directly drill into the soft mud layer, making the drilling method simpler and optimizing the combined structure. Attached Figure Description

[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0016] Figure 2 This is an exploded view of the three-dimensional structure of the present invention.

[0017] Figure 3 This is a three-dimensional structural cross-sectional view of the present invention.

[0018] Figure 4 This is a three-dimensional structural diagram of the lower sleeve hanger of the present invention.

[0019] Figure 5 This is a three-dimensional structural diagram of the upper sleeve hanger of the present invention.

[0020] Figure 6 This is a three-dimensional structural diagram of the piston of the present invention.

[0021] Figure 7 This is a three-dimensional structural diagram of the adapter connector of the present invention.

[0022] Figure 8 This is a three-dimensional structural diagram of the locking pin, anti-rotation sleeve, and anti-rotation screw of the present invention.

[0023] Figure 9 This is a three-dimensional structural diagram of the shear screw of the present invention.

[0024] In the attached diagram, the following labels are used: 1-casing hanger, 2-feeder body, 3-piston, 4-steel ball, 5-drill tool connector, 6-locking pin, 7-anti-rotation sleeve, 8-anti-rotation screw, and 9-shearing screw. Implementation

[0025] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0026] A type of torsion-transmitting sleeve feeding tool, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 9 As shown, the device includes a sleeve hanger 1, an inserter 2, a piston 3, and a shear screw 9. The inserter 2 is slidably connected inside the sleeve hanger 1. The inserter 2 is a stepped cylindrical structure with a central through hole. The two ends of the central hole are tapered female threads. The bottom of the inserter 2 is hexagonal, which can fit with the hexagonal top of the sleeve hanger 1, thus enabling the device to rotate circumferentially. The piston 3 is placed inside the inserter 2. The piston 3 is used to provide propulsion power. The uppermost part of the outer circle of the piston 3 is an outer square. The outer circle of the piston 3 has three sealing rings. The first ring is located at the lower end of the outer square, the second ring is located in the middle part, and the third ring is located at the bottom. After the piston 3 is installed, the three sealing rings are located in the three sealing surfaces of the central hole of the inserter 2, which can effectively increase the sealing performance. The piston 3 is fixed and locked by the shear screw 9.

[0027] like Figure 2 and Figure 3 As shown, it also includes a steel ball 4, which is placed on top of the piston 3 and can seal the piston 3.

[0028] like Figure 2 , Figure 3 and Figure 7 As shown, it also includes a drill bit connector 5, which is threadedly connected to the lower part of the feed body 2 for connecting the drill bit.

[0029] like Figure 2 , Figure 3 and Figure 8 As shown, it also includes a locking pin 6 and an anti-rotation sleeve 7. The left and right sides of the feeding body 2 are slidably connected with locking pins 6. The locking pins 6 can contact the piston 3. The middle of the locking pin 6 is a cylindrical structure, and one end face is a W-shaped arc, which cooperates with the W-shaped annular groove of the feeding body 2. The locking pins 6 are all engaged with the sleeve hook 1. The locking pins 6 can also be engaged with the piston 3. The bottom of the locking pin 6 is connected to the anti-rotation sleeve 7, which can prevent the locking pin 6 from rotating.

[0030] like Figure 2 , Figure 3 and Figure 8As shown, it also includes anti-rotation screws 8. The anti-rotation sleeves 7 are all threaded with anti-rotation screws 8 to further prevent the locking pins 6 from rotating.

[0031] When the casing hanger 1 needs to be sent into the drilling well, firstly, the drill string connector 5 is rotated out and connected to the drill bit. Then, both the drill string connector 5 and the drill bit are loaded into the sending body 2, so that the sending body 2 and the drill string connector 5 are threadedly connected. Then, the piston 3 is inserted into the sending body 2. When the piston 3 touches the locking pin 6, the piston 3 will slide the locking pin 6 to the side away from each other, so that the locking pin 6 is engaged with the sending body 2, realizing axial engagement, thus engaging the casing hanger 1 with the sending body 2, thereby achieving a locking effect. As the piston 3 moves to the position, the shear screws 9 are rotated and driven into the side closer to each other, so that the piston 3 and the sending body 2 are locked and fixed. After the device is fully locked, the device is sent into the installed re-entry cone using the drill pipe. A re-entry cone is a large, funnel-shaped body commonly used in marine drilling to lower the drill bit. When the feed body 2 is about to contact the seabed mud surface, the external pump (generally referring to the power source for the drill bit during drilling) is activated, causing the drill rod to rotate. This, in turn, causes the device to rotate, allowing the drill bit to begin drilling into the mud surface. The feed body 2 then moves downwards continuously. During this process, the locking pins 6 are firmly locked by the anti-rotation sleeves 7 and anti-rotation screws 8, preventing movement due to the high-speed rotation of the feed body 2. This disengages the casing hanger 1 from the feed body 2, and the feed body 2 simultaneously drives the re-entry cone downwards. Drilling stops when the re-entry cone contacts the mud surface. After drilling is complete, a steel ball 4 is dropped into the feed body 2. When the steel ball 4 contacts the mud surface... When piston 3 reaches the top, it is sealed and locked. Due to the continuous pressurization within the device, the internal pressure of the feed body 2 begins to fluctuate. Under high pressure, the shear screw 9 breaks, thus disengaging the piston 3 from its locking position. At this point, piston 3 slides downwards under its own weight and contacts the drill string connector 5. Simultaneously, the pump pressure display shows a sudden drop in internal pressure. As piston 3 descends, locking pins 6, because the feed body 2 is still on a high-speed rotating turntable, will pop out and reset to their respective sides, engaging with piston 3 to lock and fix the feed body 2 and piston 3. At the same time, locking pins 6 disengage from casing hanger 1, unlocking casing hanger 1. At this point, the external pump can be turned off, and the drill rod can be pulled out to remove the feed body 2. During this process, since the locking pins 6 are all disengaged from the casing hanger 1, the casing hanger 1 will not be pulled out. Other parts will move as the drill pipe is pulled out. After this process is completed, the lowering of the casing hanger 1 is completed. In summary, by locking the piston 3 with the feed body 2 and the locking pins 6 with the casing hanger 1 through the shear screws 9, the effect of locking the feed body 2 and the casing hanger 1 is achieved. As the drill bit is connected to the drill bit and drilling begins, the casing hanger 1 will move downward along with the feed body 2. Then, the steel ball 4 pressurizes the feed body 2, causing the shear screws 9 to break. The piston 3 slides down and engages with the locking pins 6, thereby disengaging the feed body 2 from the casing hanger 1. Finally, the feed body 2 is pulled out through the drill pipe, thus completing the lowering of the casing hanger 1.

[0032] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A torsion-transmitting sleeve feeding tool, characterized in that: It includes a sleeve hanger (1), a feed body (2), a piston (3) and a shear screw (9). The feed body (2) is slidably connected inside the sleeve hanger (1). The piston (3) is placed inside the feed body (2). The piston (3) is fixed and locked by the shear screw (9). The feed body (2) is a stepped cylindrical structure with a central through hole. The two ends of the central hole are tapered female threads. The bottom of the feed body (2) is hexagonal, which can fit with the hexagonal top of the sleeve hanger (1), so that the device can achieve circumferential rotation. The uppermost part of the outer circle of the piston (3) is an outer square. The outer circle of the piston (3) has three sealing rings. The first ring is located at the lower end of the outer square, the second ring is located in the middle part, and the third ring is located at the bottom. After the piston (3) is installed, the three sealing rings are located in the three sealing surfaces of the center hole of the feed body (2), which can effectively increase the sealing performance. It also includes a steel ball (4), and a steel ball (4) is placed on top of the piston (3); It also includes a locking pin (6) and an anti-rotation sleeve (7). The left and right sides of the feeding body (2) are slidably connected with locking pins (6). The locking pins (6) can contact the piston (3). The bottom of the locking pins (6) is connected with an anti-rotation sleeve (7). It also includes anti-rotation screws (8), and anti-rotation sleeves (7) are threadedly connected with anti-rotation screws (8).

2. The torsion-transmitting sleeve feeding tool as described in claim 1, characterized in that: It also includes a drill bit connector (5), and the lower part of the feed body (2) is threadedly connected to the drill bit connector (5).

3. The torsion-transmitting sleeve feeding tool as described in claim 2, characterized in that: The locking pin (6) has a cylindrical structure in the middle and a W-shaped arc on one end face, which matches the W-shaped annular groove of the feed body (2). The locking pin (6) is engaged with the sleeve hook (1) and the locking pin (6) can be engaged with the piston (3).

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