Assembled non-magnetic drill collar

Abstract

The utility model discloses an assembled non-magnetic drill collar which comprises a drill collar rod portion, one end of the drill collar rod portion is provided with a threaded end, the other end of the drill collar rod portion is provided with a connecting sleeve, a drill collar end is installed below the connecting sleeve, and a connecting end is arranged at the connecting position of the drill collar end and the connecting sleeve. A fixing bolt is mounted at the joint of the limiting plate and the rod part of the drill collar; a limiting sliding groove is formed in the connecting position of the sliding sleeve and the drill collar rod portion, linkage piles are installed on the two sides of the sliding sleeve, and fixing bolts are arranged on the inner sides of the linkage piles. Compared with an existing device, the assembled non-magnetic drill collar has the advantages that the fixing bolt can be limited through the linkage pile and the elastic block, so that loosening of the fixing bolt can be avoided, the connecting sleeve and the drill collar rod part can be relatively fixed through the positioning screw and the positioning screw hole, and the positioning screw can be limited and prevented from falling off through the linkage pile and the elastic block at the same time.

Description

Technical Field

[0001] The utility model relates to the technical field of non-magnetic drill collars, and particularly relates to an assembled non-magnetic drill collar. Background Technique

[0002] Since all magnetic measuring instruments sense the earth's magnetic field of the wellbore when measuring the direction of the wellbore, the measuring instrument must be in a non-magnetic environment. However, during the drilling process, the drill string often has magnetism and a magnetic field, which affects the magnetic measuring instrument and cannot obtain the correct wellbore trajectory measurement information data. The non-magnetic drill collar can implement a non-magnetic environment and has the characteristics of a drill collar during drilling. The non-magnetic drill collar is a low-carbon high-chromium manganese alloy steel drill collar, which is refined through strict chemical composition ratio and has good low magnetic permeability and high-strength mechanical properties.

[0003] Chinese Patent with the authorization publication number of CN218971133U discloses a high-strength non-magnetic drill collar, including a drill collar body. An installation mechanism is arranged at the top of the drill collar body, and a connection plate is welded at the top of the installation mechanism; the installation mechanism includes an installation plate welded to the bottom of the connection plate. An installation groove is opened inside the installation plate. A positioning column is welded to the inner side of the top of the installation plate. A positioning hole matching the positioning column is opened inside the drill collar body. A locking screw penetrates through the installation plate, and the end of the locking screw extends into the drill collar body. A threaded hole matching the locking screw is opened on the outer wall of the drill collar body. For this high-strength non-magnetic drill collar, through the arranged installation mechanism, it is more convenient for operators to install the drill collar, and it is convenient for operators to repair and replace the drill collar in the later stage, effectively improving the convenience of operators.

[0004] Although the above non-magnetic drill collar is convenient for operators to repair and replace the drill collar in the later stage and effectively improves the convenience of operators, most of the existing drill collars adopt a threaded screwing structure in the process of combined connection and are only connected and fixed by the way of thread rotation, which is difficult to ensure the stability of the drill collar during use. When the assembled part becomes loose, it will seriously affect the use effect of the drill collar. For this reason, we propose an assembled non-magnetic drill collar. Summary of the Invention

[0005] The purpose of the utility model is to provide an assembled non-magnetic drill collar to solve the problem proposed in the above background technique that since most of the existing drill collars adopt a threaded screwing structure in the process of combined connection and are only connected and fixed by the way of thread rotation, it is difficult to ensure the stability of the drill collar during use. When the assembled part becomes loose, it will seriously affect the use effect of the drill collar.

[0006] To achieve the above purpose, the utility model provides the following technical solution: An assembled non-magnetic drill collar, including:

[0007] The drill collar rod part, one end of the drill collar rod part is provided with a threaded end, the other end of the drill collar rod part is installed with a connecting sleeve, and a drill collar end is installed below the connecting sleeve, and a connecting end is arranged at the connection between the drill collar end and the connecting sleeve;

[0008] The limiting plates are installed on both sides outside the drill collar end, and fixing bolts are installed at the connection between the limiting plates and the drill collar rod part;

[0009] The sliding sleeve is installed outside the drill collar rod part, a limiting sliding groove is arranged at the connection between the sliding sleeve and the drill collar rod part, linkage piles are installed on both sides of the sliding sleeve, and fixing bolts are arranged inside the linkage piles.

[0010] Preferably, the drill collar end is threadedly connected to the connecting sleeve through the threaded end, and the connecting sleeve is fixedly connected to the drill collar rod part, and the fixing bolt penetrates through the inside of the limiting plate.

[0011] Preferably, the sliding sleeve is slidably clamped and connected to the drill collar rod part through the limiting sliding groove, and the sliding sleeve is relatively fixed to the drill collar rod part through bolts.

[0012] Preferably, the linkage piles are symmetrically distributed about the vertical center line of the sliding sleeve, and an elastic structure is formed between the linkage piles and the fixing bolts through elastic blocks.

[0013] Preferably, the drill collar rod parts are connected to each other through the threaded ends, and the connecting sleeve is relatively fixed to the drill collar rod part through positioning screws and positioning screw holes, and an elastic structure is formed between the linkage piles and the positioning screws through elastic blocks.

[0014] Preferably, the drill collar rod part further includes:

[0015] The base material layer is arranged inside the drill collar rod part, a reinforcing mesh is arranged outside the base material layer, and a protective outer layer is arranged outside the reinforcing mesh.

[0016] Preferably, the reinforcing mesh is closely attached to the base material layer, and the protective outer layer is made of high molecular polyethylene material.

[0017] Compared with the prior art, the utility model provides an assembled non-magnetic drill collar, which has the following beneficial effects:

[0018] The linkage pile of the present utility model can limit the fixing bolt through the elastic block, thereby avoiding the loosening of the fixing bolt. The connecting sleeve and the drill collar rod part can be relatively fixed through the positioning screw and the positioning screw hole. The linkage pile and the elastic block can simultaneously limit and prevent the positioning screw from coming off, avoiding the problem that in the prior art, most of the drill collars adopt a threaded screwing structure during the combined connection process and are only connected and fixed by means of thread rotation, which is difficult to ensure the stability of the drill collar during use. When the assembled part becomes loose, it will seriously affect the use effect of the drill collar. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0020] Figure 2 is a schematic diagram of the external structure of the drill collar rod part of the present utility model;

[0021] Figure 3 is a schematic diagram of the structure of the drill collar rod part and the drill collar end of the present utility model;

[0022] Figure 4 is a schematic diagram of the connection structure of two drill collar rod parts of the present utility model;

[0023] Figure 5 is a schematic diagram of the sectional structure of the drill collar rod part of the present utility model.

[0024] In the figure: 1. Drill collar rod part; 2. Threaded end; 3. Connecting sleeve; 4. Drill collar end; 5. Limiting plate; 6. Connecting end; 7. Fixing bolt; 8. Sliding sleeve; 9. Limiting chute; 10. Linkage pile; 11. Elastic block; 12. Positioning screw hole; 13. Positioning screw; 14. Base material layer; 15. Reinforcing mesh; 16. Protective outer layer. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0026] Please refer to Figures 1-3, A modular non-magnetic drill collar, comprising: a drill collar rod part 1, one end of the drill collar rod part 1 is provided with a threaded end 2, the other end of the drill collar rod part 1 is installed with a connecting sleeve 3, and a drill collar end head 4 is installed below the connecting sleeve 3, and a connecting end 6 is provided at the connection between the drill collar end head 4 and the connecting sleeve 3; the drill collar end head 4 is threadedly connected to the connecting sleeve 3 through the threaded end 2, and the connecting sleeve 3 is fixedly connected to the drill collar rod part 1, and a fixing bolt 7 penetrates through the inside of the limiting plate 5; through the threaded end 2, it is convenient for the relative connection between the drill collar end head 4 and the connecting sleeve 3, so as to facilitate the installation of the drill collar end head 4 on the drill collar rod part 1, and through the fixing bolt 7, the relative positioning of the limiting plate 5 and the drill collar rod part 1 can be carried out, which is convenient for ensuring the stability of the installation of the drill collar end head 4; a limiting plate 5, which is installed on both sides outside the drill collar end head 4, and a fixing bolt 7 is installed at the connection between the limiting plate 5 and the drill collar rod part 1; the drill collar rod parts 1 are connected to each other through the threaded end 2, and the connecting sleeve 3 is relatively fixed to the drill collar rod part 1 through a positioning screw 13 and a positioning screw hole 12, and an interlocking pile 10 and an elastic block 11 form an elastic structure between the positioning screw 13; through the threaded end 2, it is convenient for the mutual connection between the drill collar rod parts 1, so that the drill collar rods can be spliced and assembled when needed, which is convenient for extending the length of the drill collar, and through the positioning screw 13 and the positioning screw hole 12, the relative fixation of the connecting sleeve 3 and the drill collar rod part 1 can be carried out, and the interlocking pile 10 and the elastic block 11 can simultaneously limit and prevent the positioning screw 13 from coming off.

[0027] Please refer to Figure 1 、 3 and 4, a modular non-magnetic drill collar, comprising: a sliding sleeve 8, which is installed outside the drill collar rod part 1, a limiting chute 9 is provided at the connection between the sliding sleeve 8 and the drill collar rod part 1, the sliding sleeve 8 is slidably engaged with the drill collar rod part 1 through the limiting chute 9, and the sliding sleeve 8 is relatively fixed to the drill collar rod part 1 through bolts; through the limiting chute 9, it is convenient for the vertical sliding of the sliding sleeve 8; both sides of the sliding sleeve 8 are installed with interlocking piles 10, and a fixing bolt 7 is provided inside the interlocking piles 10; the interlocking piles 10 are symmetrically distributed about the vertical center line of the sliding sleeve 8, and the interlocking piles 10 and an elastic block 11 form an elastic structure between the fixing bolt 7; the interlocking piles 10 can limit the fixing bolt 7 through the elastic block 11, so as to avoid the loosening of the fixing bolt 7.

[0028] Please refer to Figure 1 、 2 and 5, a modular non-magnetic drill collar, comprising: a base layer 14, which is arranged inside the drill collar rod part 1, a reinforcing mesh 15 is arranged outside the base layer 14, and a protective outer layer 16 is arranged outside the reinforcing mesh 15; the reinforcing mesh 15 is closely attached to the base layer 14, and the protective outer layer 16 is made of high molecular polyethylene material; the reinforcing mesh 15 can improve the strength of the base layer 14, and the protective outer layer 16 made of high molecular polyethylene material can play an anti-corrosion and wear-resistant effect, so as to improve the service life of the drill collar.

[0029] Working principle: When using this assembled non-magnetic drill collar, first assemble the non-magnetic drill collar. When splicing the drill collar is required, connect the drill collar rod part 1 and the connecting sleeve 3 through the threaded end 2 to extend the length of the drill collar, and then pass the positioning screw 13 through the positioning screw hole 12 to relatively fix the connecting sleeve 3 and the drill collar rod part 1. Secondly, slide the sliding sleeve 8 downward through the limit sliding groove 9 until the linkage pile 10 and the elastic block 11 limit the positioning screw 13 from the outside, so as to prevent the loosening of the positioning screw 13. Then connect the drill collar end 4 and the connecting sleeve 3 through the threaded end 2, install the drill collar end 4 on the drill collar rod part 1, and then relatively position the limit plate 5 and the drill collar rod part 1 through the fixing bolt 7 to ensure the stability of the installation of the drill collar end 4. Then, limit the fixing bolt 7 through the linkage pile 10 and the elastic block 11 to avoid the loosening of the fixing bolt 7. Finally, the strength of the base material layer 14 is improved by the reinforcing mesh 15, and at the same time, the protective outer layer 16 made of high molecular polyethylene material can play an anti-corrosion and wear-resistant effect, thereby improving the service life of the drill collar. This is the working principle of this assembled non-magnetic drill collar.

[0030] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An assembled non-magnetic drill collar, characterized in that, Including: A drill collar rod part (1), one end of the drill collar rod part (1) is provided with a threaded end (2), the other end of the drill collar rod part (1) is installed with a connecting sleeve (3), and a drill collar end (4) is installed below the connecting sleeve (3), and a connecting end (6) is arranged at the connection between the drill collar end (4) and the connecting sleeve (3); A limiting plate (5), which is installed on both sides outside the drill collar end (4), and a fixing bolt (7) is installed at the connection between the limiting plate (5) and the drill collar rod part (1); A sliding sleeve (8), which is installed outside the drill collar rod part (1), a limiting sliding groove (9) is arranged at the connection between the sliding sleeve (8) and the drill collar rod part (1), linkage piles (10) are installed on both sides of the sliding sleeve (8), and a fixing bolt (7) is arranged inside the linkage piles (10).

2. The assembled non-magnetic drill collar according to claim 1, characterized in that, The drill collar end (4) is threadedly connected with the connecting sleeve (3) through the threaded end (2), and the connecting sleeve (3) is fixedly connected with the drill collar rod part (1), and the fixing bolt (7) penetrates through the inside of the limiting plate (5).

3. The assembled non-magnetic drill collar according to claim 1, characterized in that, The sliding sleeve (8) is slidably engaged with the drill collar rod part (1) through the limiting sliding groove (9), and the sliding sleeve (8) is relatively fixed to the drill collar rod part (1) through bolts.

4. The assembled non-magnetic drill collar according to claim 1, wherein The linkage piles (10) are symmetrically distributed about the vertical center line of the sliding sleeve (8), and an elastic structure is formed between the linkage piles (10) and the fixing bolt (7) through elastic blocks (11).

5. The assembled non-magnetic drill collar according to claim 1, wherein The drill collar rod parts (1) are connected with each other through the threaded ends (2), and the connecting sleeve (3) is relatively fixed to the drill collar rod part (1) through positioning screws (13) and positioning screw holes (12), and an elastic structure is formed between the linkage piles (10) and the positioning screws (13) through elastic blocks (11).

6. The assembled non-magnetic drill collar according to claim 1, characterized in that, The drill collar rod part (1) is further provided with: A base material layer (14), which is arranged inside the drill collar rod part (1), a reinforcing mesh (15) is arranged outside the base material layer (14), and a protective outer layer (16) is arranged outside the reinforcing mesh (15).

7. The assembled non-magnetic drill collar according to claim 6, wherein, The reinforcing mesh (15) is closely attached to the base material layer (14), and the protective outer layer (16) is made of a high molecular polyethylene material.

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