Anti-wear sleeve and its pick-up and delivery tool, anti-wear sleeve assembly

Abstract

The present invention provides an anti-wear sleeve and a tool for taking and delivering the anti-wear sleeve, and an anti-wear sleeve assembly. The anti-wear sleeve includes a sleeve and a claw. The sleeve is used to be sleeved on the drill pipe. The connecting end of the claw is fastened to the outer wall of the sleeve, and the free end of the claw is used to engage with a groove provided on the inner surface of the anti-wear sleeve. The anti-wear sleeve includes a sleeve body used to be sleeved on the casing head. The inner surface of the sleeve body is provided with a groove for cooperating with the claw of the tool for taking and delivering the anti-wear sleeve, and the outer surface of the sleeve body is provided with a limit groove for cooperating with the casing head. The anti-wear sleeve assembly includes the above-mentioned delivery tool and the above-mentioned anti-wear sleeve. When the anti-wear sleeve needs to be inspected or replaced, the present invention can realize the delivery of the anti-wear sleeve without removing the drill bit from the well, which can effectively improve the efficiency of inspecting or replacing the anti-wear sleeve and reduce the production cost of drilling operations.

Description

Technical Field

[0001] The present invention relates to the field of drilling equipment, in particular to an anti-wear sleeve and a taking and delivering tool thereof, and an anti-wear sleeve assembly. Background Art

[0002] During drilling operations, each time a certain depth is reached, a layer of casing is added and a casing head is installed. The movement of the drill string at the wellhead can cause wear and tear on the casing head and other equipment, resulting in significant safety hazards and economic losses. Therefore, anti-wear sleeves are installed on the casing head to prevent damage. However, for safe production, these sleeves must be removed and inspected regularly.

[0003] Currently, the anti-wear sleeve is designed so that the diameter of the lower opening is smaller than the diameter of the drill bit, while the diameter of the upper opening is larger than the diameter of the casing head. Furthermore, the edge of the upper opening is designed to overlap the top surface of the casing head. When the anti-wear sleeve needs to be placed in the casing, it is put on the drill rod above the drill bit and then lowered down from the top opening of the casing along with the drill bit until the upper flange of the anti-wear sleeve overlaps the top surface of the casing head. When the anti-wear sleeve needs to be removed from the casing for inspection, the drill bit is lifted from the bottom to the top. Since the diameter of the drill bit is larger than the diameter of the lower opening of the anti-wear sleeve, when the drill bit contacts the lower opening of the anti-wear sleeve, the anti-wear sleeve can be pushed upward out of the casing.

[0004] However, this method takes a lot of time in deep drilling operations, which is not conducive to reducing production costs. Summary of the Invention

[0005] The present invention provides an anti-wear sleeve and a tool for taking and delivering the same, as well as an anti-wear sleeve assembly, so as to solve the problem in the prior art that taking and delivering the anti-wear sleeve takes a long time.

[0006] According to an embodiment of the present invention, a tool for removing and delivering a wear sleeve includes:

[0007] A sleeve, used for being sleeved on the drill pipe;

[0008] A claw, wherein the connecting end of the claw is fastened to the outer wall of the sleeve, and the free end of the claw is used to engage with the groove provided on the inner surface of the anti-wear sleeve.

[0009] In one implementation, a plurality of the claws are provided along the circumference of the sleeve.

[0010] In one implementation, the plurality of claws are evenly arranged along the circumference of the sleeve.

[0011] In one implementation, the claw is made of elastic material.

[0012] In an implementation, the sleeve includes a first half-sleeve and a second half-sleeve, the first half-sleeve and the second half-sleeve are detachably assembled together, and the first half-sleeve and the second half-sleeve define an accommodating space for the drill rod to pass through.

[0013] In one implementation, the first half-cylinder and the second half-cylinder are threadedly connected by a threaded fastener.

[0014] In an implementation manner, the first half-cylinder and the second half-cylinder are provided with the same number or different numbers of the claws.

[0015] In one implementation, the claws provided on the first half-cylinder and the claws provided on the second half-cylinder are symmetrical with respect to the central axis of the sleeve.

[0016] According to an embodiment of the present invention, a wear sleeve includes:

[0017] The sleeve body is used to be sleeved on the sleeve head;

[0018] The inner surface of the sleeve is provided with a clamping groove for cooperating with the clamping claw of the pick-up and delivery tool of the anti-wear sleeve;

[0019] The outer surface of the sleeve is provided with a limiting groove for cooperating with the sleeve head.

[0020] According to an embodiment of the present invention, an anti-wear sleeve assembly includes the aforementioned pick-up and delivery tool and the aforementioned anti-wear sleeve.

[0021] The present invention provides an anti-wear sleeve and its pick-up and delivery tool, and an anti-wear sleeve assembly. The anti-wear sleeve includes a sleeve body, the inner surface of which is provided with a slot, and the outer surface of which is provided with a limit slot that cooperates with a casing head. The pick-up and delivery tool for the anti-wear sleeve includes a sleeve and a claw fastened to the outer wall of the sleeve, wherein the sleeve is used to be sleeved on a drill pipe, and the free end of the claw is used to engage with the slot on the inner surface of the anti-wear sleeve. When the anti-wear sleeve needs to be removed from the wellhead, the pick-up and delivery tool is installed on the drill pipe, and the drill tool is lowered until the claw of the pick-up and delivery tool engages with the slot of the anti-wear sleeve. The drill pipe is then raised, and the pick-up and delivery tool brings the fixed anti-wear sleeve out of the wellhead together. When the anti-wear sleeve needs to be delivered into the wellhead, the anti-wear sleeve is fixedly connected to the pick-up and delivery tool, and the pick-up and delivery tool is installed on the drill pipe, and the drill tool is lowered until the anti-wear sleeve is delivered to the installation position. Thus, the wear sleeve and its removal tool provided by the present invention can be used to remove and deliver the wear sleeve by simply lifting and lowering the drill pipe over a short distance. Therefore, in deep well drilling, the use of the wear sleeve and its removal tool provided by the present invention can shorten the time required to remove and deliver the wear sleeve, reduce the cost of inspecting and replacing the wear sleeve, and also help increase production speed and improve production quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The above and other objects, features and advantages of the embodiments of the present invention will become more readily understood through the following detailed description with reference to the accompanying drawings, in which several embodiments of the invention are illustrated by way of example and not limitation, in which:

[0023] Figure 1 A schematic structural diagram of a pick-up and delivery tool provided in an embodiment of the present invention;

[0024] Figure 2 A schematic diagram of the partial structure of a drill rod provided in an embodiment of the present invention;

[0025] Figure 3 A schematic structural diagram of the second half cylinder provided in an embodiment of the present invention;

[0026] Figure 4 A schematic structural diagram of another sleeve provided in an embodiment of the present invention;

[0027] Figure 5 A schematic structural diagram of another pick-up and delivery tool provided in an embodiment of the present invention;

[0028] Figure 6 A cross-sectional view of an anti-wear sleeve provided in an embodiment of the present invention.

[0029] Reference numerals:

[0030] 100-pick-up and delivery tools;

[0031] 110-sleeve;

[0032] 111-mounting plate;

[0033] 112-threaded hole;

[0034] 120-claw;

[0035] 200-drill pipe;

[0036] 210-male buckle;

[0037] 220-female buckle;

[0038] 300-anti-wear sleeve;

[0039] 310-limiting slot;

[0040] 320-groove;

[0041] 330-body. DETAILED DESCRIPTION

[0042] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention, but are not to be construed as limiting the present invention.

[0043] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0044] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0045] In the present invention, unless otherwise specified or limited, the terms "mounted," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they may refer to fixed connection, detachable connection, or integration; they may refer to direct connection or indirect connection through an intermediate medium; they may refer to internal communication between two components or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0046] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0047] During drilling operations, a layer of casing is added when the well reaches a certain depth. This supports the wellbore wall and ensures the proper functioning of the entire well during drilling and after completion. A casing head is also installed on the casing to secure the wellhead and provide weight support for the casing. The casing head also acts as a seal. Because the drill pipe is prone to contact with the casing head during drilling operations, anti-wear sleeves are often installed on the casing head to prevent wear.

[0048] In order to inspect or replace the anti-wear sleeve, it is necessary to remove the anti-wear sleeve from the well or send it into the well. In the prior art, the anti-wear sleeve needs to be taken out or sent in by pulling out the drill bit. When the anti-wear sleeve needs to be placed in the casing, it is put on the drill rod above the drill bit, and then it is sent into the inlet together with the drill bit and overlapped on the top surface of the casing head; when the anti-wear sleeve needs to be removed from the casing, the drill bit is lifted from the bottom to move the anti-wear sleeve upward out of the wellhead. However, if the drill bit is pulled out from a deeper well, it takes a long time, which will increase production costs and reduce production rates, and is also not conducive to safe production.

[0049] In view of this, the present disclosure has designed a pick-up and delivery tool that can hold and fix an anti-wear sleeve. The pick-up and delivery tool can be placed on a drill pipe and move up and down within the casing along with the drill pipe, so that the anti-wear sleeve held thereon can be lowered into or removed from the well by the pick-up and delivery tool. In other words, using the anti-wear sleeve and the anti-wear sleeve pick-up and delivery tool provided by the present disclosure, the anti-wear sleeve can be picked up and delivered without the need to trip the drill bit, thereby shortening the pick-up and delivery time of the anti-wear sleeve, improving the drilling operation efficiency, and significantly reducing the inspection and replacement costs of the anti-wear sleeve.

[0050] Several optional implementations of the present disclosure are introduced below in conjunction with the accompanying drawings. Those skilled in the art should understand that the following implementations are merely illustrative and not an exhaustive list. Based on these implementations, those skilled in the art may replace, splice or combine certain features or examples, which should still be regarded as the disclosed contents of the present disclosure.

[0051] Figure 1 The figure shows a structure of a tool for taking and delivering a wear-resistant sleeve. Figure 1 As shown, the present disclosure provides a retrieval tool 100 comprising a sleeve 110 and a claw 120 securely connected to the outer wall of the sleeve 110. The sleeve 110 is designed to be mounted on a drill pipe (described below), enabling the retrieval tool 100 to move synchronously with the drill pipe. The claw 120 is designed to engage with the anti-wear sleeve, enabling the sleeve to move synchronously with the retrieval tool 100. In other words, this arrangement allows the anti-wear sleeve to move synchronously with the drill pipe. As the drill pipe is raised, the sleeve is carried out of the wellhead along with the sleeve, and as the drill pipe is lowered, the sleeve is carried into the wellhead along with the sleeve.

[0052] Figure 2 The local structure of the drill pipe is shown. Figure 2 As shown, the drill pipe on which the retrieval and delivery tool 100 is mounted is a cylindrical structure, primarily used to transmit torque and transport drilling fluid. The drill pipe 200 can be composed of a pin 210 and a box 220. During use, the pin 210 and box 220 are threaded together. It is worth noting that during the drilling process, the drill pipe can be continuously connected to achieve the goal of continuously deepening the wellbore.

[0053] It should be understood that in order to securely connect the sleeve 110 to the drill rod 200 , the inner wall of the sleeve 110 and the outer wall of the drill rod 200 are usually tightly fitted together.

[0054] The wear sleeve and its removal tool provided by the present invention only require a short distance of lifting and lowering the drill pipe to remove and deliver the wear sleeve. Therefore, in deep well drilling, the use of the wear sleeve and its removal tool provided by the present invention can shorten the time required to remove and deliver the wear sleeve, reduce the cost of inspecting and replacing the wear sleeve, and also help to increase production speed and improve production quality.

[0055] In some examples, the sleeve 110 can be assembled from multiple detachable parts. For example, the sleeve 110 can be two hinged semi-cylinders, each having a hole for a pin to pass through at its free end. This allows the sleeve 110 to be assembled and locked onto the drill rod 200 using the pin without first disassembling the drill rod 200. Optionally, a plurality of protrusions are spaced apart on the inner surfaces of the two semi-cylinders, and corresponding mounting grooves corresponding to the protrusions are provided on the outer surface of the drill rod 200. When the sleeve 110 is assembled onto the drill rod 200, the protrusions in the sleeve 110 can snap into the mounting grooves of the drill rod 200, further preventing the sleeve 110 from becoming loose from the drill rod 200.

[0056] In an optional example, the sleeve 110 includes a first half-cylinder and a second half-cylinder with completely identical structures, that is, the first half-cylinder and the second half-cylinder are two semi-cylinder structures that are mirror-symmetrical. Figure 1 The first half of the pick-up and delivery tool is shown. Figure 3 The structure of the second half of the cylinder is shown. Figure 1 and Figure 3 As shown, the first half-cylinder and the second half-cylinder, when engaged, define an accommodating space for the drill rod 200 to pass through. That is, the first half-cylinder and the second half-cylinder can form a complete cylindrical structure when assembled together, so that the drill rod 200 can be surrounded by the sleeve 110, so that the picking and delivering tool 100 can be installed on the drill rod 200, ensuring that the picking and delivering tool 100 and the drill rod 200 move synchronously.

[0057] Schematically, mounting plates 111 are provided at both the left and right ends of the first and second halves, for assembling the two halves together. Mounting plates 111 are flat plates and optionally include two vertically arranged threaded holes 112, allowing for threaded fasteners such as bolts or screws to threadably connect the first and second halves, thereby securing the retrieval tool 100 to the drill rod 200.

[0058] The first half-cylinder and the second half-cylinder are threadedly connected by threaded fasteners, so that the sleeve 110 is easy to assemble and the sleeve 110 can be ensured not to fall off the drill rod 200 by adjusting the tightening force; moreover, it is convenient to disassemble and assemble the first half-cylinder and the second half-cylinder at any time, which is beneficial for the operator to install the picking and delivering tool 100 on the drill rod 200 at any time; in this way, the disassembly and assembly speed of the picking and delivering tool 100 is effectively improved, and the workload of the operator is reduced.

[0059] When manufacturing the sleeve 110 , the sleeve 110 may be formed by stamping a metal plate, or by cutting a metal plate.

[0060] When manufacturing the mounting plate 111 on the sleeve 110, the mounting plate 111 can be welded to the ends of the two half-sleeves, or the sleeve 110 with the mounting plate can be directly formed by stamping or cutting a metal plate. When machining the threaded hole 112 on the mounting plate 111, the internal thread can be machined using a tap or a thread milling cutter.

[0061] It should be noted that in some examples, the mounting plate 111 in this embodiment can be replaced with nuts. For example, two horizontally placed nuts can be welded to the ends of the first and second half cylinders, respectively. When the first and second half cylinders are fastened together, the central axes of the nuts on the two half cylinders coincide, and the corresponding end faces of the nuts on the two half cylinders abut against each other, so that threaded fasteners such as bolts or screws can be threadedly connected to the nuts to assemble the two half cylinders together.

[0062] It is understandable that the sleeve 110 can also be configured as an integral structure according to actual needs.

[0063] Figure 4 Another sleeve structure is shown. Figure 4 As shown, the sleeve 110 of the picking and delivering tool 100 can be an integrated cylindrical structure. When installing the picking and delivering tool 100, it is necessary to first disassemble the drill rod 200 and then sleeve the sleeve 110 onto the drill rod 200.

[0064] like Figure 1 and Figure 3As shown, a claw 120 is further provided on the outer surface of the upper end of the sleeve 110. The connecting end of the claw 120 is tightly connected to the outer wall of the sleeve 110, and the free end of the claw 120 is used to engage with the groove of the anti-wear sleeve 300, so as to fix the anti-wear sleeve 300 on the pick-up and delivery tool 100, so that the anti-wear sleeve can move synchronously with the pick-up and delivery tool 100, thereby achieving the purpose of placing the anti-wear sleeve 300 into or removing it from the well through the pick-up and delivery tool 100.

[0065] Figure 5 Another structure of a pick-up and delivery tool is shown. In some examples, such as Figure 5 As shown, the sleeve 110 is provided with a claw 120 that is fixedly engaged with the anti-wear sleeve 300. In other examples, the sleeve 110 is provided with multiple claws 120 that are fixedly engaged with the anti-wear sleeve 300 to increase the connection strength between the claws 120 and the anti-wear sleeve 300 and prevent the anti-wear sleeve 300 from falling off the claws 120 during the movement of the pick-up and delivery tool 100.

[0066] Schematically, a plurality of claws 120 are provided along the circumference of the sleeve 110 to increase the number of connection points between the claws 120 and the anti-wear sleeve 300 in the circumferential direction, thereby increasing the connection reliability. Moreover, when the anti-wear sleeve 300 moves following the pick-up and delivery tool 100, the anti-wear sleeve 300 can also be subjected to the same external force in the circumferential direction, thereby preventing the anti-wear sleeve 300 from being misaligned during the pick-up and delivery process. Specifically, when the anti-wear sleeve 300 moves synchronously with the pick-up and delivery tool 100, the anti-wear sleeve 300 is always subjected to a vertical pulling force, so that the anti-wear sleeve 300 is always in a vertical position and does not deviate, thereby preventing the anti-wear sleeve 300 from colliding with the well wall, thereby ensuring that the anti-wear sleeve 300 is smoothly brought into or out of the wellhead.

[0067] Optionally, multiple claws 120 are evenly arranged along the circumference of the sleeve 110 to ensure uniform force on the anti-wear sleeve 300, thereby avoiding shaking when the anti-wear sleeve 300 and the picking and delivering tool 100 move, thereby increasing the connection reliability between the claws 120 and the anti-wear sleeve 300, and ensuring that the anti-wear sleeve 300 does not loosen from the claws 120 during movement.

[0068] Continue to refer to Figure 1 and Figure 3 The claw 120 can be designed as a roughly rod-shaped structure. The connecting end of the claw 120 is fastened to the outer surface of the sleeve 110 by welding or integral molding. The free end of the claw 120 is used to engage with the slot of the anti-wear sleeve 300. The rod-shaped structure of the claw 120 is easy to process and manufacture, which is conducive to improving the processing speed.

[0069] It should be understood that the first and second half cylinders can be provided with the same or different numbers of claws 120. Whether the first and second half cylinders are provided with the same or different numbers of claws 120, the sleeve 110 can be secured to the inner surface of the anti-wear sleeve 300 by clamping. That is, the upper end of the anti-wear sleeve 300 can be subjected to vertical forces in the circumferential direction, achieving the effect of synchronous movement of the anti-wear sleeve 300 with the retrieval tool 100. In particular, when the first and second half cylinders are provided with the same number of claws 120, the forces acting on the first and second half cylinders are more balanced, preventing relative misalignment between the first and second half cylinders due to uneven forces, thereby ensuring the normal operation of the retrieval tool 100.

[0070] In some implementations, the claw 120 provided with the first half-tube and the claw 120 provided with the second half-tube can be symmetrical about the central axis of the sleeve 110. This arrangement allows the wear sleeve 300 to be evenly stressed after being connected to the pick-up tool 100, making the engagement between the wear sleeve 300 groove 320 and the claw 120 more stable, thereby preventing the wear sleeve 300 from shaking due to the change in speed of the pick-up tool 100 during the movement of the wear sleeve 300. Therefore, the connection reliability of the pick-up tool 100 and the wear sleeve 300 can be increased, helping to securely connect the pick-up tool 100 to the wear sleeve 300. Furthermore, the symmetrical design of the first half-tube and the second half-tube also facilitates manufacturing and processing. Simultaneously, during assembly, there is no need to distinguish between the first half-tube and the second half-tube, saving installation time.

[0071] Continue to refer to Figure 1 and Figure 3 One end of the claw 120 is securely connected to the outer wall of the sleeve 110, and the other end of the claw 120 is positioned away from the central axis of the sleeve 110. The other end of the claw 120 is bent toward the central axis of the sleeve 110 to form a bent portion, which can be, for example, a horizontally placed flat plate. The bent portion of the claw 120 is configured to abut against the horizontal surface of the groove 320 of the anti-wear sleeve 300, which will be described below.

[0072] like Figure 1 and Figure 3As shown, each half-tube is provided with a complete claw 120 and two half claws, which are evenly arranged along the circumference of the sleeve 110. The two half claws are respectively provided at the left and right ends of the half-tube, and the other complete claw is provided in the middle of the half-tube. When the first half-tube and the second half-tube are assembled together, the half claws at the ends of the first half-tube can cooperate with the half claws at the ends of the second half-tube to form two complete claws 120. That is, after the first half-tube and the second half-tube are assembled, four complete claws 120 can be formed on the sleeve 110, and any two adjacent claws 120 are equally spaced. This ensures that when the anti-wear sleeve 300 is engaged with the sleeve 110, the first half-tube and the second half-tube are subjected to the same force, preventing the first and second half-tube from becoming loose due to uneven force, thereby affecting the handling of the anti-wear sleeve 300.

[0073] In some examples, the first and second halves of the sleeve 110 can be provided with three complete claws 120, evenly spaced along the circumference of the sleeve 110. One claw 120 is positioned in the middle of each half, and the other two claws 120 are positioned to the left and right of the first claw 120, each equidistant from the first claw 120. When the first and second halves are assembled together, the sleeve 110 has a total of six claws 120, with the claws 120 of the first and second halves symmetrically spaced relative to the vertical end surfaces of the halves.

[0074] Figure 6 FIG. 3 shows a structure of a wear-resistant sleeve 300. Figure 6 As shown, the body 330 of the wear-resistant sleeve 300 is generally cylindrical in structure. The diameter of the upper end of the body 330 is larger than the diameter of the lower end of the body 330. The upper edge of the body 330 is also designed with an upper flange for resting on the top surface of the casing head. The inner surface of the body 330 is provided with a rectangular groove 320 for engaging with the claw 120. The groove 320 is provided at the upper end of the inner surface of the wear-resistant sleeve 300 so that the claw 120 is fixedly engaged with the groove 320. It should be understood that when manufacturing the groove 320 of the wear-resistant sleeve 300, the groove 320 can be milled into the inner surface of the wear-resistant sleeve 300 using a cutting process.

[0075] When the claw 120 of the picking and delivering tool 100 extends into the sleeve body 330 of the anti-wear sleeve 300: if the claw 120 is placed upward and the claw 120 of the picking and delivering tool 100 is clamped and fixed to the anti-wear sleeve 300, the bent portion of the claw 120 and the upper end surface of the groove 320 of the anti-wear sleeve 300 abut against each other, and the claw 120 and the lower end of the groove 320 of the anti-wear sleeve 300 are clamped; if the claw 120 of the picking and delivering tool 100 is placed downward and the claw 120 of the picking and delivering tool 100 is clamped and fixed to the anti-wear sleeve 300, the bent portion of the claw 120 and the lower end surface of the groove 320 of the anti-wear sleeve 300 abut against each other, and the claw 120 and the upper end of the groove 320 of the anti-wear sleeve 300 are clamped.

[0076] Schematically, to enhance the clamping force between the claw 120 and the wear sleeve 300, in some implementations, the claw 120 can be made of an elastic material. For example, the claw 120 can be stamped from an elastic metal sheet and then welded to the sleeve 110. When the tool 100 is engaged with the wear sleeve 300, the claw 120 can deform to allow it to enter the inner surface of the wear sleeve 300 and thus into the groove 320 of the wear sleeve 300. When the tool 100 is separated from the wear sleeve 300, the claw 120 can deform to allow it to disengage from the groove 320 of the wear sleeve 300.

[0077] The following briefly describes how the elastic claws and the anti-wear sleeve work together:

[0078] When the claw 120 is positioned downward and engaged with the anti-wear sleeve 300, if the anti-wear sleeve 300 remains stationary and the pick-up tool 100 moves upward, the claw 120 deforms toward the central axis of the sleeve 110 under the combined action of the upward pulling force of the pick-up tool 100 and the horizontal inward contact force of the inner wall of the anti-wear sleeve 300, that is, the claw 120 appears to be contracted. This causes the claw 120 to disengage from the groove 320 of the anti-wear sleeve 300 and abut against the inner wall of the anti-wear sleeve 300. If the anti-wear sleeve 300 remains stationary and the pick-up tool 100 continues to move upward, the claw 120 will disengage from the inner wall of the anti-wear sleeve 300 and return to its original state, that is, the claw 120 appears to be in an open state.

[0079] When the claws 120 are placed upward, the anti-wear sleeve 300 is located below the pick-up and delivery tool 100, and the pick-up and delivery tool 100 moves toward the anti-wear sleeve 300. When the pick-up and delivery tool 100 moves into the anti-wear sleeve 300, until the claws 120 contact the inner wall of the anti-wear sleeve 300, the claws 120 are deformed toward the central axis of the sleeve 110 under the horizontal inward contact force of the inner wall of the anti-wear sleeve 300, that is, the claws 120 appear to be in a contracted state. If the pick-up and delivery tool 100 continues to move, the claws 120 continue to follow the pick-up and delivery tool 100 and move into the anti-wear sleeve 300 until the claws 120 enter and engage with the grooves 320 of the anti-wear sleeve 300, that is, the claws 120 appear to be in an open state.

[0080] Schematically, a limiting groove 310 is provided on the outer surface of the sleeve body 330 for cooperating with the top screw of the casing head to fix the anti-wear sleeve 300 and prevent the anti-wear sleeve 300 and the casing head from rotating relative to each other, thereby enabling the anti-wear sleeve 300 to prevent the casing head from being worn.

[0081] In some examples, the claw 120 can also have other shapes. For example, the claw 120 of the sleeve 110 can be shaped as a vertical rod, with one end of the claw 120 rod being firmly connected to the sleeve 110, and the other end of the claw 120 rod being provided with a circular hole on the side facing away from the central axis of the sleeve 110. A spring and a cylindrical pin are disposed within the circular hole, with one end of the spring firmly connected to the cylindrical pin, and the other end of the spring firmly connected to the inner end surface of the circular hole. The cylindrical pin can extend and retract within the circular hole by stretching or compressing the spring. The end surface of the cylindrical pin facing away from the central axis of the sleeve 110 is configured as an arc-shaped end surface to prevent the cylindrical pin from scratching the inner surface of the anti-wear sleeve 300, thereby facilitating the engagement of the cylindrical pin with the groove 320.

[0082] In this example, due to the use of a compression spring, the claw 120 and the groove 320 of the anti-wear sleeve 300 are also elastically engaged, so the claw 120 does not need to be made of elastic material. The other shape features of the sleeve 110 are the same as those of the above-mentioned sleeve 110 and will not be repeated here.

[0083] Accordingly, the upper end of the inner surface of the anti-wear sleeve 300 should be provided with an arc-shaped groove 320 to be clamped and fixed with the cylindrical pin on the claw 120. Other shape features of the anti-wear sleeve 300 are the same as those of the above-mentioned anti-wear sleeve 300 and will not be repeated here.

[0084] Combined with the following Figure 1 、 Figure 2 、 Figure 3 and Figure 6 The structure shown briefly introduces the process of using the pick-up and delivery tool 100 to deliver the anti-wear sleeve 300 into or out of the wellhead.

[0085] The process of removing the wear sleeve 300 from the well using the retrieval tool 100 is as follows;

[0086] First, place the drill pipe on the turntable on the drill floor for suspending the drill tool. Then, unscrew the top screw on the casing head out of the limit groove 310 of the anti-wear sleeve 300 to loosen the anti-wear sleeve 300 from the casing head. Then, use bolts or other threaded fasteners to assemble the two sleeves 110 of the pick-up and delivery tool 100 at the male buckle 210 joint of the drill pipe 200, and place the pick-up and delivery tool 100 with the claws 120 facing upward.

[0087] The drill rod 200 is then lowered until the claws 120 of the pick-up and delivery tool 100 contact the inner surface of the anti-wear sleeve 300. Under the contact force of the inner surface of the anti-wear sleeve 300, the claws 120 deform toward the central axis of the anti-wear sleeve 300, i.e., the claws shrink and deform. The drill rod 200 continues to be slowly lowered until the claws 120 enter the grooves 320 on the inner surface of the anti-wear sleeve 300. The claws 120 open under the action of their own elastic restoring force, so that the flat surface of the claws 120 abuts against the horizontal surface of the inner surface of the groove 320, and the claws 120 are engaged with the lower end of the groove 320 of the anti-wear sleeve 300. In other words, the pick-up and delivery tool 100 is fixedly engaged with the anti-wear sleeve 300.

[0088] At this time, if the drill rod 200 encounters resistance when being lowered, the lowering of the drill rod 200 is stopped, and then the drill rod 200 is lifted up. Since the anti-wear sleeve 300 is fixed by the retrieval tool 100, it can be taken out of the wellhead together with the retrieval tool 100.

[0089] Finally, after the anti-wear sleeve 300 is brought out of the wellhead, the drilling tool can be disassembled and the anti-wear sleeve 300 can be inspected or replaced.

[0090] After the inspection or replacement of the anti-wear sleeve 300 is completed, the process of using the pick-up and delivery tool 100 to deliver the anti-wear sleeve 300 into the drilling well is as follows;

[0091] First, the claws 120 of the pick-up tool 100 are placed downwards and fixed to the grooves 320 of the wear-resistant sleeve 300. The two pick-up tools 100 with the wear-resistant sleeve 300 are fixed to the joint of the drill pipe 200 using bolts.

[0092] Then, slowly lower the drill tool until its lowering is blocked. At this point, when the wear sleeve 300 is seated on the casing head, the horizontal plane of the flat plate of the clamping jaw 120 tightly abuts the horizontal surface of the inner surface of the groove 320 of the wear sleeve 300. In other words, the wear sleeve 300 has been lowered to the casing head installation position, and the retrieval tool 100 cannot further lower the wear sleeve 300. Therefore, further lowering of the drill tool is blocked. Screw the top screw on the casing head into the retaining groove 310 of the wear sleeve 300 to securely connect the wear sleeve 300 to the casing head.

[0093] The drill tool is then lifted, causing the pick-up and delivery tool 100 mounted thereon to slowly rise. The claws 120 of the pick-up and delivery tool 100 leave the grooves 320. Under the action of the horizontal inward contact force of the wear sleeve 300, the claws 120 deform toward the central axis of the wear sleeve 300, i.e., they contract and deform. The claws 120 rise with the pick-up and delivery tool 100 until they separate from the inner surface of the wear sleeve 300. After separation, the claws 120 open under the action of their own elastic restoring force, i.e., they return to their original state.

[0094] Finally, when the picking-up and delivery tool 100 continues to rise and is brought out of the wellhead, the threaded fasteners can be loosened and the picking-up and delivery tool 100 can be removed from the drill pipe.

[0095] Furthermore, this embodiment provides an anti-wear sleeve assembly, comprising the aforementioned anti-wear sleeve 300 and its retrieval tool 100. The retrieval tool 100 provided in this embodiment can be fixedly engaged with the inner surface of the anti-wear sleeve 300, allowing the anti-wear sleeve 300 to follow the movement of the retrieval tool 100. Furthermore, the retrieval tool 100 can be mounted on a drill rod 200, enabling the retrieval of the anti-wear sleeve 300 by lifting and lowering the drill rod 200 over a short distance. Using the anti-wear sleeve assembly provided in this embodiment not only shortens the retrieval time of the anti-wear sleeve 300 and improves the efficiency of inspecting or replacing the anti-wear sleeve 300, but also facilitates safe production.

[0096] In the description of this specification, the reference terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0097] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A tool for taking and delivering a wear-resistant sleeve, characterized in that: include: A sleeve, used for being sleeved on the drill pipe; A claw, wherein the connecting end of the claw is fastened to the outer wall of the sleeve, and the free end of the claw is used to engage with a groove provided on the inner surface of the anti-wear sleeve; One end of the claw is tightly connected to the outer wall of the sleeve, and the other end of the claw is arranged in a direction away from the central axis of the sleeve, and the other end of the claw is bent toward the central axis of the sleeve to form a bent portion; the bent portion of the claw is used to abut against the horizontal surface of the groove of the anti-wear sleeve; When the claw is placed downward and is clamped and fixed with the anti-wear sleeve, if the anti-wear sleeve is fixed and the pick-up and delivery tool moves upward, the claw is deformed toward the central axis of the sleeve under the combined action of the upward pulling force of the pick-up and delivery tool and the horizontal inward contact force of the inner wall of the anti-wear sleeve, and the claw is in a contracted state, the claw disengages from the groove of the anti-wear sleeve and abuts against the inner wall of the anti-wear sleeve; if the anti-wear sleeve continues to remain stationary and the pick-up and delivery tool continues to move upward, the claw will disengage from the inner wall of the anti-wear sleeve and return to the open state; When the claw is placed upward, the anti-wear sleeve is located below the picking and delivering tool, and the picking and delivering tool moves toward the anti-wear sleeve. When the picking and delivering tool moves into the inside of the anti-wear sleeve until the claw contacts the inner wall of the anti-wear sleeve, the claw is deformed toward the central axis of the sleeve under the action of the horizontal inward contact force of the inner wall of the anti-wear sleeve, and the claw appears to be in a contracted state; if the picking and delivering tool continues to move, the claw continues to follow the picking and delivering tool to move into the inside of the anti-wear sleeve until the claw enters the groove of the anti-wear sleeve and engages with the groove of the anti-wear sleeve.

2. The pick-up and delivery tool according to claim 1, characterized in that: A plurality of the claws are arranged along the circumference of the sleeve.

3. The pick-up and delivery tool according to claim 2, characterized in that: The plurality of claws are evenly arranged along the circumference of the sleeve.

4. The pick-up and delivery tool according to claim 3, characterized in that: The claws are made of elastic material.

5. The pick-up and delivery tool according to any one of claims 1 to 4, characterized in that: The sleeve includes a first half-sleeve and a second half-sleeve, which are detachably assembled together and define an accommodating space for the drill rod to pass through.

6. The pick-up and delivery tool according to claim 5, characterized in that: The first half-barrel and the second half-barrel are threadedly connected by a threaded fastener.

7. The pick-up and delivery tool according to claim 6, characterized in that: The first half-cylinder and the second half-cylinder are provided with the same number or different numbers of the claws.

8. The pick-up and delivery tool according to claim 7, characterized in that: The claws provided on the first half-cylinder and the claws provided on the second half-cylinder are symmetrical with respect to the central axis of the sleeve.

9. An anti-wear sleeve assembly, characterized in that: The device comprises the pick-up and delivery tool and the anti-wear sleeve according to any one of claims 1 to 8; Wherein, the anti-wear sleeve comprises: The sleeve body is used to be sleeved on the sleeve head; The inner surface of the sleeve is provided with a clamping groove for cooperating with the clamping claw of the pick-up and delivery tool of the anti-wear sleeve according to any one of claims 1 to 8; The outer surface of the sleeve is provided with a limiting groove for cooperating with the sleeve head.

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