Well drilling casing pipe for directional drilling

Abstract

The utility model relates to the technical field of well drilling casings, and discloses a well drilling casing for directional drilling, which comprises a first pipe body and a second pipe body, a first connecting plate is fixedly mounted at the bottom end of the first pipe body, a second connecting plate is fixedly mounted at the top end of the second pipe body, and a connecting mechanism is arranged between the first connecting plate and the second connecting plate; the connecting mechanism comprises an inverted-T-shaped annular plate and a pulling plate, a first limiting annular groove is formed in the top end of the second connecting plate, the inverted-T-shaped annular plate is in sliding connection with the first limiting annular groove, a second limiting annular groove is formed in the bottom end of the first connecting plate, and the inverted-T-shaped annular plate is inserted into the second limiting annular groove. According to the drilling casing pipe, two drilling casing pipes can be conveniently disassembled and assembled by a worker, the working efficiency of the worker is improved, and the problems that existing drilling casing pipes are connected through threads, but the threads are prone to being abraded and inconvenient to disassemble and assemble, and internal threads and external threads are difficult to turn and inconvenient to use by the worker are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of drilling casings, in particular to a drilling casing used for directional drilling. Background Art

[0002] Drilling casing is used to support the well wall for directional drilling, ensure the accuracy of the drilling position, and facilitate the drill rod to enter the casing to drill the bottom layer. The casing is as long as 100 meters and is an integrated structure. It is very easy to corrode or be squeezed and broken by the hard stones in the well wall in the harsh environment underground. The overall replacement cost is high. The integrated structure is also difficult to process and requires large-scale machining equipment to complete the processing. In order to solve the defects of the integrated casing, people connect multiple short casings through threads, which not only ensures the processing coaxiality, but also ensures that when a short casing is damaged, only the damaged one needs to be replaced, so there is no need to replace the entire casing, saving costs; however, the thread is easy to wear after long-term use, which makes it very difficult to disassemble and assemble the casing. For this reason, we propose a drilling casing for directional drilling. Utility Model Content

[0003] The utility model aims to provide a drilling casing for directional drilling, which solves the problems in the background technology.

[0004] To achieve the above object, the utility model provides the following technical solution: a drilling casing for directional drilling, comprising a first pipe body and a second pipe body, wherein a first connecting plate is fixedly installed at the bottom end of the first pipe body, and a second connecting plate is fixedly installed at the top end of the second pipe body, and a connecting mechanism is provided between the first connecting plate and the second connecting plate;

[0005] The camming mechanism comprises an inverted T-shaped ring plate and a pulling plate, the top end of the second connecting plate is provided with a limiting ring groove 1, the inverted T-shaped ring plate is slidably connected with the limiting ring groove 1, the bottom end of the first connecting plate is provided with a limiting ring groove 2, the inverted T-shaped ring plate is inserted in the limiting ring groove 2, the inverted T-shaped ring plate is fixedly installed with a clamping block near the inner and outer sides of the top end, the clamping block is clamped in the limiting ring groove 2, the bottom end of the first connecting plate is connected with the limiting ring groove 2 and a plate groove is provided, the bottom end of the inverted T-shaped ring plate is connected with the limiting ring groove 2 and a connecting rod is fixedly installed, the top end of the pulling plate is fixedly provided with a connecting rod, the connecting rod is inserted in the bottom end of the operating sleeve rod, the top end of the connecting rod is fixedly provided with a spring, one end of the spring is fixedly installed on the top end of the inner wall of the operating sleeve rod, the bottom end of the inner wall of the limiting ring groove 1 is penetrated with a sliding groove, the operating sleeve rod movably penetrates the sliding groove, the top end of the pulling plate is fixedly provided with a pin column, and the bottom end of the second connecting plate is provided with a pin groove, and the pin column is inserted in the pin groove.

[0006] Preferably, the clamping block is adapted to the plate groove and the second limiting ring groove, and there are two clamping blocks on the inner and outer sides of the inverted T-shaped ring plate. By setting the clamping block, the clamping block can be inserted into the second limiting ring groove, thereby limiting and fixing the first connecting plate.

[0007] Preferably, the operating sleeve rod is adapted to the slide groove, and the pin column is adapted to the pin groove. By setting the pin column, the pin column can be inserted into the pin groove, thereby limiting the operating sleeve rod, thereby improving the stability of the inverted T-shaped ring plate in the limiting ring groove when the two drilling casings are connected.

[0008] Preferably, a limiting column is fixedly installed at the bottom end of the first connecting plate, and a column groove is opened at the top end of the second connecting plate, and the limiting column is inserted into the column groove.

[0009] Preferably, a wall pad is fixedly installed on the inner wall of the column groove, the wall pad is in close contact with the outer wall surface of the limiting column, and the material of the wall pad is wear-resistant rubber.

[0010] Preferably, the number of the limiting posts and the number of the post grooves are both eight. By providing eight limiting posts and post grooves, the connection strength between the two tube bodies can be improved.

[0011] The utility model provides a drilling casing for directional drilling. The drilling casing for directional drilling has the following beneficial effects:

[0012] (1) The drilling casing used for directional drilling can be easily disassembled and assembled between two drilling casings by providing a connection mechanism, thereby improving the work efficiency of workers and solving the problem that the existing drilling casings are connected by threads, but the threads are easily worn, which makes disassembly and assembly inconvenient and inconvenient for personnel to use;

[0013] (2) The drilling casing used for directional drilling can improve the connection strength between the first pipe body and the second pipe body by setting the limit column and the column groove, thereby ensuring the overall use strength of the drilling casing, and by setting the wall pad, it can play a certain shock-absorbing role on the drilling casing as a whole, reduce the wear of the drilling casing caused by vibration, and increase the service life of the drilling casing. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 This is a front sectional structural schematic diagram of the utility model;

[0016] Figure 3 This is a schematic diagram of the side sectional structure of the utility model;

[0017] Figure 4 For this utility model Figure 2Schematic diagram of the enlarged structure of the middle B part

[0018] Figure 5 For this utility model Figure 3 Schematic diagram of the enlarged structure of the middle B part

[0019] Figure 6 It is a schematic diagram of the disassembled structure of the first tube body and the second tube body of the utility model.

[0020] In the figure: 1. first tube body; 2. second tube body; 3. first connecting plate; 4. second connecting plate; 5. connecting mechanism; 6. limiting column; 7. column groove; 8. wall pad; 501. inverted T-shaped ring plate; 502. limiting ring groove one; 503. limiting ring groove two; 504. plate groove; 505. clamping block; 506. operating sleeve rod; 507. connecting rod; 508. pulling plate; 509. pin column; 510. pin groove; 511. spring; 512. slide groove. DETAILED DESCRIPTION

[0021] The following is a further detailed description of the implementation of the present utility model in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present utility model, but cannot be used to limit the scope of the present utility model.

[0022] In the description of the present invention, unless otherwise specified, "multiple" means two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third" and the like are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0023] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] Embodiment 1:

[0025] The preferred embodiment of the drilling casing for directional drilling provided by the utility model is as follows: Figures 1 to 6As shown: a drilling casing for directional drilling, comprising a first pipe body 1 and a second pipe body 2, wherein a first connecting plate 3 is fixedly installed at the bottom end of the first pipe body 1, a second connecting plate 4 is fixedly installed at the top end of the second pipe body 2, and a connecting mechanism 5 is provided between the first connecting plate 3 and the second connecting plate 4;

[0026] The connecting mechanism 5 includes an inverted T-shaped ring plate 501 and a pull plate 508. A limiting ring groove 1 502 is provided at the top of the second connecting plate 4. The inverted T-shaped ring plate 501 is slidably connected to the limiting ring groove 1 502. A limiting ring groove 2 503 is provided at the bottom of the first connecting plate 3. The inverted T-shaped ring plate 501 is inserted into the limiting ring groove 2 503. Blocks 505 are fixedly installed on the inner and outer sides of the inverted T-shaped ring plate 501 near the top. The block 505 is clamped in the limiting ring groove 2 503. The bottom end of the first connecting plate 3 is connected to the limiting ring groove 2 503 and a plate groove 504 is provided. The inverted T-shaped ring plate 5 01 An operating sleeve rod 506 is fixedly installed at the bottom end, a connecting rod 507 is fixedly installed at the top of the pull plate 508, the connecting rod 507 is inserted into the bottom end of the operating sleeve rod 506, a spring 511 is fixedly installed at the top of the connecting rod 507, one end of the spring 511 is fixedly installed at the top end of the inner wall of the operating sleeve rod 506, a sliding groove 512 is penetrated at the bottom end of the inner wall of the limiting ring groove 502, the operating sleeve rod 506 movably penetrates the sliding groove 512, a pin column 509 is fixedly installed at the top of the pull plate 508, a pin groove 510 is opened at the bottom end of the second connecting plate 4, and the pin column 509 is inserted into the pin groove 510.

[0027] Specifically, the above technical solution is as follows: the pull plate 508 is pulled downward, the pull plate 508 drives the connecting rod 507 to stretch the spring 511, and the pull plate 508 also drives the pin 509 to move downward, so that the pin 509 is separated from the pin groove 510, and then the operating sleeve rod 506 is pulled to slide the operating sleeve rod 506 in the slide groove 512, so that the operating sleeve rod 506 slides 90° in the slide groove 512, and the operating sleeve rod 506 drives the inverted T-shaped ring plate 501 to rotate 90° in the limiting ring groove 1 502, and the inverted T-shaped ring plate 501 drives the clamping block 505 to rotate 90° in the limiting ring groove 2 503, so that the clamping block 505 The block 505 moves to the position where the limiting ring groove 503 and the plate groove 504 intersect. At this time, the blocking block 505 no longer limits the first connecting plate 3. Then, the first tube body 1 is moved upward or the second tube body 2 is moved downward, so that the first connecting plate 3 can be separated from the second connecting plate 4, thereby completing the disassembly of the tube bodies. Through this mechanism, it is convenient for personnel to disassemble and assemble two drilling casings, improve the work efficiency of workers, and solve the problem that the existing drilling casings are connected by threads, but the threads are easy to wear, which is inconvenient to disassemble and assemble, and the turning of internal and external threads is difficult, which is inconvenient for personnel to use.

[0028] Furthermore, the clamping block 505 is matched with the plate groove 504 and the second limiting ring groove 503, and the number of the clamping blocks 505 on the inner side and the outer side of the inverted T-shaped ring plate 501 is two;

[0029] Among them, by providing the clamping block 505, the clamping block 505 can be clamped into the second limiting ring groove 503, so that the first connecting plate 3 can be limited and fixed.

[0030] Furthermore, the operating sleeve rod 506 is matched with the slide groove 512, and the pin 509 is matched with the pin groove 510;

[0031] Among them, by setting the pin 509, the pin 509 can be inserted into the pin groove 510, so as to limit the operating sleeve rod 506, thereby improving the stability of the inverted T-shaped ring plate 501 in the limiting ring groove 1 502 when the two drilling casings are connected.

[0032] Embodiment 2:

[0033] Based on the first embodiment, the drilling casing for directional drilling provided by the present invention is preferably implemented as follows: Figures 1 to 6 As shown: a limiting column 6 is fixedly installed at the bottom end of the first connecting plate 3, a column groove 7 is opened at the top end of the second connecting plate 4, the limiting column 6 is inserted into the column groove 7, a wall pad 8 is fixedly installed on the inner wall of the column groove 7, the wall pad 8 is in close contact with the outer wall surface of the limiting column 6, and the material of the wall pad 8 is wear-resistant rubber.

[0034] Specifically, in the above technical solution, when the first connecting plate 3 and the second connecting plate 4 are connected, the eight limiting columns 6 are correspondingly inserted into their respective column grooves 7. By setting the limiting columns 6 and the column grooves 7, the connection strength between the first tube body 1 and the second tube body 2 can be improved, thereby ensuring the overall use strength of the drilling casing. In addition, by setting the wall pad 8, a certain shock-absorbing effect can be played on the drilling casing as a whole, thereby reducing the wear of the drilling casing caused by vibration and increasing the service life of the drilling casing.

[0035] Furthermore, the number of the limiting posts 6 and the post slots 7 are both eight;

[0036] Among them, by providing eight limiting columns 6 and column grooves 7, the connection strength between the two pipe bodies can be improved.

[0037] The embodiments of the present invention are provided for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

Claims

1. A drilling casing for directional drilling, comprising a first pipe body (1) and a second pipe body (2), characterized in that: A first connecting plate (3) is fixedly mounted on the bottom end of the first tube body (1), a second connecting plate (4) is fixedly mounted on the top end of the second tube body (2), and a connecting mechanism (5) is provided between the first connecting plate (3) and the second connecting plate (4); The connecting mechanism (5) comprises an inverted T-shaped ring plate (501) and a pull plate (508); a limiting ring groove (502) is provided at the top end of the second connecting plate (4); the inverted T-shaped ring plate (501) is slidably connected to the limiting ring groove (502); a limiting ring groove (503) is provided at the bottom end of the first connecting plate (3); the inverted T-shaped ring plate (501) is inserted into the limiting ring groove (503); a clamping block (505) is fixedly installed on the inner side and the outer side near the top end of the inverted T-shaped ring plate (501); the clamping block (505) is clamped in the limiting ring groove (503); a plate groove (504) is provided at the bottom end of the first connecting plate (3) in communication with the limiting ring groove (503); the inverted T-shaped ring plate (50 1) An operating sleeve rod (506) is fixedly installed at the bottom end, a connecting rod (507) is fixedly installed at the top end of the pull plate (508), the connecting rod (507) is inserted into the bottom end of the operating sleeve rod (506), a spring (511) is fixedly installed at the top end of the connecting rod (507), one end of the spring (511) is fixedly installed at the top end of the inner wall of the operating sleeve rod (506), a sliding groove (512) is penetrated through the bottom end of the inner wall of the limiting ring groove 1 (502), the operating sleeve rod (506) movably penetrates the sliding groove (512), a pin column (509) is fixedly installed at the top end of the pull plate (508), a pin groove (510) is opened at the bottom end of the second connecting plate (4), and the pin column (509) is inserted into the pin groove (510).

2. A drilling casing for directional drilling according to claim 1, characterized in that: The clamping block (505) is matched with the plate groove (504) and the second limiting ring groove (503), and the number of the clamping blocks (505) on the inner side and the outer side of the inverted T-shaped ring plate (501) is two.

3. A drilling casing for directional drilling according to claim 1, characterized in that: The operating sleeve rod (506) is matched with the slide groove (512), and the pin column (509) is matched with the pin groove (510).

4. A drilling casing for directional drilling according to claim 1, characterized in that: A limiting column (6) is fixedly mounted on the bottom end of the first connecting plate (3), a column groove (7) is provided on the top end of the second connecting plate (4), and the limiting column (6) is inserted into the column groove (7).

5. A drilling casing for directional drilling according to claim 4, characterized in that: A wall pad (8) is fixedly mounted on the inner wall of the column groove (7), the wall pad (8) is in close contact with the outer wall surface of the limiting column (6), and the material of the wall pad (8) is wear-resistant rubber.

6. A drilling casing for directional drilling according to claim 4, characterized in that: The number of the limiting columns (6) and the number of the column grooves (7) are both eight.

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