Rock core taking tool for preventing tripping of inner cylinder in petroleum drilling

Abstract

The utility model discloses a rock core taking tool for preventing an inner cylinder from tripping in petroleum drilling, which relates to the technical field of petroleum geological drilling and comprises a drill bit and an anti-tripping pipe, the upper end of the drill bit is fixedly connected with an outer connecting pipe, the lower end of the anti-tripping pipe is fixedly connected with an inner connecting pipe, and the inner connecting pipe is in threaded connection with the inner side of the outer connecting pipe. And an inner barrel is fixedly connected to the interior of the anti-disengaging pipe and located on the inner side of the inner connecting pipe, and a plurality of mounting grooves are formed in the side wall of the outer connecting pipe and are formed in the circumferential direction of the outer connecting pipe at equal intervals. The inner connecting pipe can be locked, the tripping phenomenon is further eliminated, the production cost is effectively reduced, and the inner connecting pipe has the advantages of being firm in connection and not prone to tripping.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of petroleum geology drilling technology, especially to a core taking tool for preventing the inner cylinder from being uncoupled in petroleum drilling. BACKGROUND

[0002] In the process of petroleum geology drilling, core taking is a very important work, and through the analysis of the taken core, underground geological data can be obtained to provide data for drilling and oil production. UTILITY MODEL CONTENT

[0003] The utility model discloses a core taking tool for preventing the inner cylinder from being uncoupled in petroleum drilling.

[0004] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0005] A core taking tool for preventing the inner cylinder from being uncoupled in petroleum drilling, comprising a drill bit and an anti-uncoupling pipe, wherein the upper end of the drill bit is fixedly connected with an outer connecting pipe, the lower end of the anti-uncoupling pipe is fixedly connected with an inner connecting pipe, the inner connecting pipe is threadedly connected to the inner side of the outer connecting pipe, the inner side of the inner connecting pipe is fixedly connected with an inner cylinder, the side wall of the outer connecting pipe is provided with a plurality of mounting grooves, the plurality of mounting grooves are equidistantly arranged along the circumference of the outer connecting pipe, and the inner side of each mounting groove is provided with a locking mechanism for locking the inner connecting pipe.

[0006] As a further improvement of the utility model, the locking mechanism comprises an anti-uncoupling locking rod arranged in the mounting groove, the end of the anti-uncoupling locking rod is fixedly connected with a stop rod, a tension spring is sleeved on the stop rod, one end of the tension spring is fixed to one end of the anti-uncoupling locking rod, and the other end of the tension spring is fixed to the inner wall of the mounting groove.

[0007] As a further improvement of the utility model, the side wall of the inner connecting pipe is provided with an anti-uncoupling groove matched with the anti-uncoupling locking rod.

[0008] As a further improvement of the utility model, the outer side wall of the outer connecting pipe is threadedly sleeved with an anti-uncoupling cap, and the stop rod abuts against the inner wall of the anti-uncoupling cap.

[0009] As a further improvement of the utility model, the end of the anti-uncoupling locking rod away from the stop rod is an arc surface structure.

[0010] As a further improvement of the utility model, the end of the stop rod away from the anti-uncoupling locking rod is an arc surface structure.

[0011] The utility model has the advantages that:

[0012] By setting when the inner connecting pipe is connected to the inner side of the outer connecting pipe, then by the anti-drop locking rod is inserted into the anti-drop slot on the inner connecting pipe, the inner connecting pipe can be locked, further eliminate the generation of tripping phenomenon, effectively reduce the production cost, has the characteristics of firm connection, not easy to trip. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 A structure schematic view of the rock core taking tool for preventing inner cylinder tripping in oil drilling is provided in the utility model;

[0014] Figure 2 A structure schematic view of the drill bit, inner connecting pipe, anti-drop slot of the rock core taking tool for preventing inner cylinder tripping in oil drilling is provided in the utility model;

[0015] Figure 3 A structure schematic view of the anti-drop pipe, outer connecting pipe, inner cylinder, mounting slot of the rock core taking tool for preventing inner cylinder tripping in oil drilling is provided in the utility model;

[0016] Figure 4 A structure schematic view of the locking mechanism of the rock core taking tool for preventing inner cylinder tripping in oil drilling is provided in the utility model.

[0017] In the drawing: 1 drill bit, 2 anti-drop pipe, 3 outer connecting pipe, 4 anti-drop cap, 5 inner connecting pipe, 6 anti-drop slot, 7 inner cylinder, 8 mounting slot, 9 anti-drop locking rod, 10 abutting rod, 11 tension spring. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments.

[0019] Referring to Figures 1-4 A rock core taking tool for preventing inner cylinder tripping in oil drilling, comprising a drill bit 1 and an anti-drop pipe 2, the upper end of the drill bit 1 is fixedly connected with an outer connecting pipe 3, the lower end of the anti-drop pipe 2 is fixedly connected with an inner connecting pipe 5, the inner connecting pipe 5 is threadedly connected to the inner side of the outer connecting pipe 3, the inside of the anti-drop pipe 2 is fixedly connected with an inner cylinder 7, the inner cylinder 7 is located on the inner side of the inner connecting pipe 5, a plurality of mounting slots 8 are arranged on the side wall of the outer connecting pipe 3, the plurality of mounting slots 8 are equidistantly arranged along the circumference of the outer connecting pipe 3, and the inside of each mounting slot 8 is provided with a locking mechanism for locking the inner connecting pipe 5.

[0020] The utility model discloses, when using, the inner connecting pipe 5 is screwed in the inside of outer connecting pipe 3, then again screw tightly anti -unhooking cap 4, make anti -unhooking cap 4 go up, through anti -unhooking cap 4 go up and the abutment of abutment 10, and then make abutment 10 remove, through the removal of abutment 10 drive anti -unhooking locking rod 9 insert the inside of anti -unhooking groove 6 on inner connecting pipe 5, can lock inner connecting pipe 5, further eliminate the generation of tripping phenomenon.

[0021] The utility model discloses, when using, the inner connecting pipe 5 is screwed in the inside of outer connecting pipe 3, then again screw tightly anti -unhooking cap 4, make anti -unhooking cap 4 go up, through anti -unhooking cap 4 go up and the abutment of abutment 10, and then make abutment 10 remove, through the removal of abutment 10 drive anti -unhooking locking rod 9 insert the inside of anti -unhooking groove 6 on inner connecting pipe 5, can lock inner connecting pipe 5, further eliminate the generation of tripping phenomenon.

[0022] The above, only for the preferred specific implementation mode of the utility model, but the protection scope of the utility model does not limit to this, any skilled in the technical field of technology in the utility model discloses the technical range, according to the utility model technical scheme and the utility model concept of the utility model, carries out equivalent replacement or changes, all should cover in the protection scope of the utility model.

Claims

1. A core sampling tool for preventing inner tube disengagement in oil drilling, comprising a drill bit (1) and an anti-disengagement tube (2), characterized in that, The upper end of the drill bit (1) is fixedly connected to an outer connecting pipe (3), and the lower end of the anti-detachment pipe (2) is fixedly connected to an inner connecting pipe (5). The inner connecting pipe (5) is threaded to the inner side of the outer connecting pipe (3). The inner cylinder (7) is fixedly connected inside the anti-detachment pipe (2). The inner cylinder (7) is located inside the inner connecting pipe (5). The side wall of the outer connecting pipe (3) is provided with multiple mounting grooves (8). The multiple mounting grooves (8) are equally spaced along the circumference of the outer connecting pipe (3). Each mounting groove (8) is provided with a locking mechanism for locking the inner connecting pipe (5).

2. The core sampling tool for preventing inner cylinder disengagement in oil drilling according to claim 1, characterized in that, The locking mechanism includes an anti-detachment locking rod (9) disposed inside the mounting groove (8). A stop rod (10) is fixedly connected to the end of the anti-detachment locking rod (9). A tension spring (11) is sleeved on the stop rod (10). One end of the tension spring (11) is fixed to one end of the anti-detachment locking rod (9), and the other end of the tension spring (11) is fixed to the inner wall of the mounting groove (8).

3. A core sampling tool for preventing inner cylinder disengagement in oil drilling according to claim 2, characterized in that, The inner connecting tube (5) has an anti-disengagement groove (6) on its side wall that cooperates with the anti-disengagement locking rod (9).

4. A core sampling tool for preventing inner cylinder disengagement in oil drilling according to claim 2, characterized in that, The outer wall of the external connecting pipe (3) is threaded with an anti-detachment cap (4), and the abutment rod (10) abuts against the inner wall of the anti-detachment cap (4).

5. A core sampling tool for preventing inner cylinder disengagement in oil drilling according to claim 2, characterized in that, The end of the anti-detachment locking rod (9) away from the abutment rod (10) has an arc-shaped structure.

6. A core sampling tool for preventing inner cylinder disengagement in oil drilling according to claim 2, characterized in that, The end of the stop bar (10) away from the anti-disengagement locking bar (9) has an arc-shaped structure.

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