A top drive casing grabbing device and working method thereof

Abstract

The invention discloses a top drive casing grabbing device and a working method thereof, and belongs to the technical field of oil drilling rig devices; the structure comprises a boom support and a boom mechanism rotatably mounted on the boom support, a casing elevator is arranged at the end of the boom mechanism, the boom mechanism is provided with a support arm for positioning, and a telescopic mechanism is further arranged between the boom mechanism and the support to drive the boom mechanism to swing; the top drive casing grabbing device and the working method thereof of the invention have a simpler structural design than the traditional structural design, and a relatively simple working principle, and further realizes the automatic control of the pipe grabbing device based on the simplified structural design, and at the same time, with the help of the structural design of the support arm, further ensures the centering positioning effect of the pipe grabbing device.

Description

Technical Field

[0001] The invention relates to a top drive casing grabbing device and a working method thereof, belonging to the technical field of oil drilling rig devices. Background Art

[0002] The top drive casing running device is a casing running device based on top drive drilling equipment, integrating mechanical and hydraulic functions. It is used for casing spinning, lifting, and lowering operations. It can rotate the casing and circulate the mud to ensure smooth casing running. By rotating the casing and circulating the drilling fluid, complex accidents can be avoided and the operation efficiency can be improved. It is particularly suitable for casing running operations in long horizontal sections, large displacement wells, and complex wells.

[0003] At present, there are many manufacturers producing and using top drive casing running devices at home and abroad, with various structures. All of them realize casing running operation through pure mechanical drive and hydraulic auxiliary mechanical drive of inner or outer casing of Cava, and each has its own characteristics. However, when used on site, the degree of automation of pipe grabbing and casing grabbing is low, and the automatic centering effect of pipe grabbing system is not good, which affects the efficient casing running operation of casing running device.

[0004] In order to realize continuous and efficient casing running operation, a top drive casing running device with better structure and more perfect performance is needed. The purpose of the present invention is to solve the above problems existing in the prior art and provide a top drive casing running pipe grabbing device. The present invention can realize automatic control of casing grabbing, has good centering and homing effect, adjustable working height, convenient replacement of hanging cards, and improves operation efficiency. Summary of the invention

[0005] The object of the present invention is to provide a top drive casing grabbing device and a working method thereof in view of the above-mentioned problems, which has a simple structure, higher automatic control and more efficient working efficiency.

[0006] The technical solution adopted by the present invention is as follows:

[0007] A top drive casing grabbing device comprises a boom support and a boom mechanism rotatably mounted on the boom support, a casing elevator being arranged at the end of the boom mechanism, a support arm for positioning being arranged on the boom mechanism, and a telescopic mechanism being arranged between the boom mechanism and the support to drive the boom mechanism to swing.

[0008] Furthermore, the boom support comprises a support body, and both sides of the support body are provided with assembly hanging posts for assembling the boom mechanism;

[0009] The arm mechanism is provided with an assembly hole matching the assembly suspension column, and the arm mechanism includes two, which are arranged in parallel and respectively assembled on both sides of the bracket body;

[0010] The telescopic mechanism comprises a telescopic cylinder, a connecting ear seat arranged at the lower part of the bracket body and a connecting ear plate arranged at the middle part of the boom mechanism. The two ends of the telescopic cylinder are respectively hinged to the connecting ear seat and the connecting ear plate.

[0011] Furthermore, the support arm comprises a support frame, both ends of which are respectively fixed on the boom mechanism, and a centering mechanism is also provided on the support frame.

[0012] Furthermore, the centering mechanism includes a centering block and an adjusting device, wherein the adjusting device is used to adjust the distance between the centering block and the support frame along a direction perpendicular to the extension direction of the boom mechanism, and a side of the centering block facing away from the support frame is provided with an inner recess for fitting the driving device.

[0013] Furthermore, the centering mechanism also includes a connecting block, the top of the connecting block is connected to the adjusting device, the bottom opposite to the top is assembled with the centering block, and the connecting block is detachably connected to the centering block.

[0014] Furthermore, the adjustment device includes a guide rod and a push rod, the support frame is provided with a positioning hole matching the guide rod and the push rod, and the push rod passes through the support frame and is fixedly connected by a nut.

[0015] Furthermore, the end of the boom mechanism is detachably fixedly equipped with a connecting seat, and the casing elevator is assembled on the connecting seat via a shackle.

[0016] Furthermore, the boom mechanism includes an upper boom section and a lower boom section, the upper boom section is assembled on a boom bracket, a telescopic mechanism is arranged between the upper boom section and the boom bracket, the other end of the upper boom section can be detachably assembled with the lower boom section, and the end of the lower boom section is assembled with a sleeve hanging card.

[0017] Furthermore, the end where the upper arm section and the lower arm section are assembled is provided with a first connecting module for assembling the lower arm section, and the end where the lower arm section and the casing elevator are assembled is provided with a second connecting module for assembling the casing elevator, the first connecting module and the second connecting module are provided with at least 2 mounting holes, and the lower arm section is provided with no less than 2 mounting holes corresponding to the first connecting module.

[0018] A working method of a top drive casing grabbing device, using the above-mentioned top drive casing grabbing device, comprises the following steps:

[0019] S1, fix the boom bracket on the installation foundation, and assemble the upper boom section, support arm, and telescopic mechanism. Install the appropriate lower boom section or adjust the length of the lower boom section according to the swing arm length requirements, and assemble the matching casing elevator.

[0020] S2, after installation, adjust the centering mechanism and the position of the centering block. The centering block can be adjusted through the inner and outer positions of the guide rod to match the centering block with the installation base. After the matching is completed, the top rod is fixedly connected to the support frame with a nut to complete the centering of the centering mechanism;

[0021] S3, after preparation, start the telescopic cylinder to make the boom mechanism swing according to the work instruction, and grab and release the casing through the casing elevator.

[0022] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0023] 1. A top drive casing grabbing device and a working method thereof of the present invention have a simpler structural design than the traditional structural design, and a relatively simple working principle. The automated control of the grabbing device is further realized based on the simplified structural design, and the centering and positioning effect of the grabbing device is further ensured by means of the structural design of the support arm;

[0024] 2. A top drive casing running device and a working method thereof of the present invention utilizes a centering mechanism to ensure the centering of the top drive casing running device and the wellbore center in the structural design of the support arm. In specific applications, the structure is simple, the adjustment method is also simple, and the one-time positioning can effectively ensure the continuity of subsequent work, thereby effectively improving the operating efficiency.

[0025] 3. A top drive casing grabbing device and a working method thereof of the present invention adopt a segmented structural design of the upper and lower sections of the boom, and a detachable design and a length-adjustable structural design, which expands the working height of the pipe grabbing device and has a wider range of adaptability. At the same time, the design of the connection method between the elevator connector and the casing elevator makes it simpler for the pipe grabbing device to replace the casing elevator and the elevator connector, thereby adapting to the operation of casings of various specifications and sizes. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The present invention will now be described by way of example with reference to the accompanying drawings, in which:

[0027] Figure 1 It is a schematic diagram of the structure of the top drive casing grabbing device of the present invention;

[0028] Figure 2 It is a top view of the casing grabbing device for the top drive of the present invention;

[0029] Figure 3 It is a structural schematic diagram of the boom support of the present invention;

[0030] Figure 4 is a side view of the boom support of the present invention;

[0031] Figure 5It is a structural schematic diagram of the support arm of the present invention;

[0032] Figure 6 It is a structural schematic diagram of the upper section of the boom of the present invention;

[0033] Figure 7 It is a structural schematic diagram of the lower section of the boom of the present invention.

[0034] Markings in the figure: 1-boom bracket, 2-support arm, 3-telescopic cylinder, 4-boom mechanism, 5-connecting bolt, 6-connecting seat, 7-casing elevator, 8-shackle, 11-bracket body, 12-assembly hanging column, 13-connecting ear seat, 21-support frame, 22-guide rod, 23-top rod, 24-centering block, 25-connecting block, 41-assembly ear plate, 42-upper section of boom, 43-connecting ear plate, 44-first connecting module, 51-lower section of boom, 52-mounting hole, 53-second connecting module. DETAILED DESCRIPTION

[0035] All features disclosed in this specification, or steps in all methods or processes disclosed, except mutually exclusive features and / or steps, can be combined in any manner.

[0036] Any feature disclosed in this specification, unless otherwise stated, can be replaced by other equivalent or alternative features with similar purposes. That is, unless otherwise stated, each feature is only an example of a series of equivalent or similar features.

[0037] Example 1

[0038] A top drive casing grabbing device, such as Figure 1-Figure 7 As shown, it includes a boom bracket 1, and a boom mechanism 4 rotatably assembled on the boom bracket 1, a casing hanger 7 is provided at the end of the boom mechanism 4, the boom mechanism 4 is provided with a support arm 2 for positioning, and a telescopic mechanism is also provided between the boom mechanism 4 and the bracket to drive the boom mechanism 4 to swing.

[0039] In this embodiment, compared with the traditional structural design, the structural design of this embodiment is simpler than the traditional structural design, and the working principle is relatively simple. Based on the simplified structural design, the automatic control of the pipe grabbing device is further realized, and the centering and positioning effect of the pipe grabbing device is further guaranteed by means of the structural design of the support arm 2. When working, the support arm 2 is fully utilized for centering and positioning, and the swing of the boom is realized in combination with the telescopic mechanism, so as to complete the grasping and lowering of the casing, and effectively improve the overall work efficiency.

[0040] As a specific design, further, the boom support 1 includes a support body 11 , and both sides of the support body 11 are provided with assembly hanging posts 12 for assembling the boom mechanism 4 .

[0041] In this embodiment, the bracket body 11 is a hoop-like structure, which is composed of two halves and is installed on the driving device (installation base). The upper and lower parts are fixedly connected by bolts. At the same time, the centering basic positioning point of the support arm 2 is based on the driving device, thereby effectively realizing the pipe grasping and centering functions of the entire structure.

[0042] Based on the above specific structural design, as a more preferred method, the arm mechanism 4 is provided with an assembly hole matching the assembly suspension column 12, and the arm mechanism 4 includes two, which are arranged in parallel and respectively assembled on both sides of the bracket body 11. The design of this method can effectively ensure the weighing capacity of the arm mechanism 4, while also ensuring the simplification of the entire structure, which is more conducive to on-site operation and observation. In a specific design, the arm mechanism 4 is assembled on the assembly suspension column 12 through an assembly ear plate 41.

[0043] Based on the design of the above specific structure, more specifically, the telescopic mechanism includes a telescopic cylinder 3, a connecting ear seat 13 arranged at the lower part of the bracket body 11, and a connecting ear plate 43 arranged at the middle part of the boom mechanism 4, and the two ends of the telescopic cylinder 3 are respectively hinged to the connecting ear seat 13 and the connecting ear plate 43. In combination with the design of the above structure, the telescopic mechanism includes two groups, each group corresponds to a boom mechanism 4, and the design of the telescopic mechanism completes the swing of the entire boom, and completes the actions of grabbing and lowering the pipe.

[0044] On the basis of the above specific design, further, the support arm 2 includes a support frame 21, both ends of the support frame 21 are respectively fixed on the boom mechanism 4, and a centering mechanism is also provided on the support frame 21.

[0045] In a specific structural design, the centering mechanism includes a centering block 24 and an adjusting device, the adjusting device is used to adjust the distance between the centering block and the support frame 21 in a direction perpendicular to the extension direction of the boom mechanism, and a concave portion for fitting the drive device is provided on one side of the centering block away from the support frame. In a more specific structural design, the concave portion can be an arc surface, a conical surface, a trapezoidal surface, etc., for matching and fitting with the drive device.

[0046] As a more specific design, the centering mechanism further includes a connecting block 25, the top of the connecting block 25 is connected to the adjusting device, the bottom opposite to the top is assembled with a centering block 24, and the connecting block 25 is detachably connected to the centering block 24. In the design of this structure, the centering block 24 can be replaced by means of the assembly structure of the connecting block 25 and the centering block 24, further improving the practicality of the entire device and better matching driving devices of multiple sizes and models.

[0047] Further optimized design, the adjustment device includes a guide rod 22 and a push rod 23, the support frame 21 is provided with a positioning hole matching the guide rod 22 and the push rod 23, and the push rod 23 passes through the support frame 21 and is fixedly connected by a nut. This structural design can effectively ensure the movement perpendicular to the direction of the support frame, and the structural design of the ice nut can further fix the positioning effect, avoid the problem of repeated adjustment and positioning, and further improve its work efficiency.

[0048] In a more specific design, the centering mechanism includes a centering block 24 for positioning, and a connecting block 25 for connecting the centering block 24, the connecting block 25 is provided with a guide rod 22 and a push rod 23, the support frame 21 is provided with a positioning hole matching the guide rod 22 and the push rod 23, and the push rod 23 is fixedly connected by a nut after passing through the support frame 21. In this structural design, a guide rod 22 is provided on both sides of the push rod 23. The design of two guide rods 22 can effectively avoid the tilt of the centering block 24, thereby ensuring the centering effect of the centering block 24 and the continuous operation of the entire centering structure. Before use, the position of the centering block can be adjusted by the guide rod to ensure that when the centering block is in contact with the drive device, the center of the wellbore is completely aligned with the center of the top drive casing.

[0049] Based on the above specific structural design, a further optimized design is provided, specifically, the end of the boom mechanism 4 is detachably fixedly equipped with a connecting seat 6, and the casing elevator 7 is assembled on the connecting seat 6 through a shackle 8. In the design of this structure, the two boom mechanisms 4 are both provided with connecting seats 6, and the connecting seats 6 are respectively assembled with casing elevators 7 through shackles 8. The design of the shackle 8 and the detachable connecting seat 6 can effectively realize the adjustment of applicability under the requirements of different pipe diameters, thereby further improving the applicability of the casing elevator 7.

[0050] Based on the above specific structural design, the boom mechanism 4 is further optimized and designed. Specifically, the boom mechanism 4 includes an upper boom section 42 and a lower boom section 51. The upper boom section 42 is assembled on the boom bracket 1. A telescopic mechanism is arranged between the upper boom section 42 and the boom bracket 1. The other end of the upper boom section 42 is detachably assembled with the lower boom section 51. The end of the lower boom section 51 is assembled with a sleeve hanger 7. In this embodiment, the upper boom section 42 and the lower boom section 51 are designed with a detachable structure, which can be fully adaptively adjusted according to different heights and distances, and the lower boom section 51 of a suitable length is selected to achieve the practicality of the boom. In addition, the design of this structure effectively reduces the difficulty of the entire assembly.

[0051] Example 2

[0052] Based on the design of Example 1, in order to further improve the practicality of the boom and reduce the preparation of accessories, as a specific design, Figure 6 and Figure 7 As shown, the end where the upper arm section 42 and the lower arm section 51 are assembled is provided with a first connecting module 44 for assembling the lower arm section 51, and the end where the lower arm section 51 and the casing elevator 7 are assembled is provided with a second connecting module 53 for assembling the casing elevator 7, the first connecting module 44 and the second connecting module 53 are provided with at least two mounting holes 52, and the lower arm section 51 is provided with no less than two mounting holes 52 corresponding to the first connecting module 44.

[0053] As a specific example, in this embodiment, the first connection module 44 and / or the second connection module 53 are provided with two mounting holes 52. The design of the two mounting holes 52 avoids the connection point from rotating.

[0054] At the same time, under normal circumstances, the corresponding lower arm section 51 is usually provided with two mounting holes 52 corresponding to the first connecting module 44 .

[0055] In this embodiment, the lower arm section 51 is provided with five mounting holes 52 corresponding to the first connection module 44, and the distance between two adjacent mounting holes 52 is the same as the two mounting distances provided on the first connection module 44. Therefore, as a distance adjustment, there are four lengths available in this structure, and similarly, there can be three, four or more. During assembly, the assembly can be completed by using the connecting bolts 5.

[0056] Example 3

[0057] On the basis of Example 1 and Example 2, a working method of the above specific structure is designed. Specifically, a working method of a top drive casing grabbing device comprises the following steps:

[0058] S1, fix the boom support 1 on the installation foundation, and assemble the boom upper section 42, the support arm 2, and the telescopic mechanism, install the matching boom lower section 51 or adjust the length of the boom lower section 51 according to the swing arm length requirement, and assemble the matching casing elevator 7;

[0059] S2, after the installation is completed, adjust the centering mechanism and the position of the centering block 24. The centering block 24 can be adjusted inward and outward through the guide rod 22 so that the centering block 24 matches the installation base. After the matching is completed, the top rod 23 is fixedly connected to the support frame 21 with a nut to complete the centering of the centering mechanism;

[0060] S3, after being ready, the telescopic cylinder 3 is started to work, so that the boom mechanism 4 swings according to the working instruction, and the casing is grabbed and released through the casing elevator 7.

[0061] The present invention is not limited to the above-mentioned specific embodiments, but extends to any new features or any new combination disclosed in this specification, as well as any new method or process steps or any new combination disclosed.

Claims

1. A top drive casing grabbing device, characterized in that: It comprises a boom support and a boom mechanism rotatably mounted on the boom support, a casing hanger is arranged at the end of the boom mechanism, a support arm for positioning is arranged on the boom mechanism, and a telescopic mechanism is arranged between the boom mechanism and the support to drive the boom mechanism to swing; The support arm comprises a support frame, both ends of which are respectively fixed on the boom mechanism, and a centering mechanism is also provided on the support frame, and the centering mechanism is used to align the center of the top drive casing with the center of the wellbore when the drive device is attached; The centering mechanism includes a centering block and an adjusting device, wherein the adjusting device is used to adjust the distance between the centering block and the support frame along a direction perpendicular to the extension direction of the boom mechanism, and a side of the centering block facing away from the support frame is provided with an inner recess for fitting the driving device.

2. A top drive casing grabbing device as claimed in claim 1, characterized in that: The boom support comprises a support body, and both sides of the support body are provided with assembly hanging posts for assembling the boom mechanism; The arm mechanism is provided with an assembly hole matching the assembly suspension column, and the arm mechanism includes two, which are arranged in parallel and respectively assembled on both sides of the bracket body; The telescopic mechanism comprises a telescopic cylinder, a connecting ear seat arranged at the lower part of the bracket body and a connecting ear plate arranged at the middle part of the boom mechanism. The two ends of the telescopic cylinder are respectively hinged to the connecting ear seat and the connecting ear plate.

3. A top drive casing grabbing device as claimed in claim 1, characterized in that: The centering mechanism also includes a connecting block, the top of the connecting block is connected to the adjusting device, the bottom opposite to the top is equipped with a centering block, and the connecting block is detachably connected to the centering block.

4. A top drive casing grabbing device as claimed in claim 1, characterized in that: The adjusting device comprises a guide rod and a push rod, the support frame is provided with a positioning hole matching the guide rod and the push rod, and the push rod passes through the support frame and is fixedly connected by a nut.

5. The top drive casing grabbing device according to claim 1, characterized in that: The end of the boom mechanism is detachably fixedly equipped with a connecting seat, and the casing elevator is assembled on the connecting seat through a shackle.

6. A top drive casing grabbing device as claimed in claim 1 or 5, characterized in that: The boom mechanism comprises an upper boom section and a lower boom section, the upper boom section is mounted on a boom bracket, a telescopic mechanism is arranged between the upper boom section and the boom bracket, the other end of the upper boom section is detachably mounted on the lower boom section, and a sleeve hanging card is mounted on the end of the lower boom section.

7. A top drive casing grabbing device as claimed in claim 6, characterized in that: The end where the upper boom section and the lower boom section are assembled is provided with a first connecting module for assembling the lower boom section, and the end where the lower boom section and the casing elevator are assembled is provided with a second connecting module for assembling the casing elevator, the first connecting module and the second connecting module are provided with at least 2 mounting holes, and the lower boom section is provided with no less than 2 mounting holes corresponding to the first connecting module.

8. A working method of a top drive casing grabbing device, using a top drive casing grabbing device according to any one of claims 1 to 7, characterized in that: The following steps are involved: S1, fix the boom bracket on the installation foundation, and assemble the upper boom section, support arm, and telescopic mechanism. Install the appropriate lower boom section or adjust the length of the lower boom section according to the swing arm length requirements, and assemble the matching casing elevator. S2, after installation, adjust the centering mechanism and the position of the centering block. The centering block can be adjusted through the inner and outer positions of the guide rod to match the centering block with the installation base. After the matching is completed, the top rod is fixedly connected to the support frame with a nut to complete the centering of the centering mechanism; S3, after preparation, start the telescopic cylinder to make the boom mechanism swing according to the work instruction, and grab and release the casing through the casing elevator.

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