Petroleum screw drill anti-falling device

Abstract

The utility model relates to the technical field of petroleum drilling tools, in particular to a petroleum screw drilling tool anti-falling device which comprises drilling rods of a petroleum screw drilling tool and anti-falling assemblies used for clamping and fixing adjacent drilling rods, the top and the bottom of each drilling rod are provided with a threaded connector and a threaded connector respectively, and the threaded connectors and the threaded connectors are used for vertically connecting the adjacent drilling rods. An annular protrusion which extends inwards and is used for clamping the anti-falling assembly is arranged at the end, close to the threaded connector, of the inner bottom of the drill rod. Through the arrangement of the drill rod with the annular protrusion and the anti-falling assembly, the drill rod device which is used for the screw drill and has the anti-falling effect is provided for petroleum operation, the connection stability of the multiple sections of connected drill rods in a well is guaranteed, the anti-falling assembly clamps the drill rods connected to the lower portion in the natural falling state, and the anti-falling effect is achieved. Therefore, stable connection between the sections of drill rods is guaranteed, and the anti-falling effect is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of petroleum drilling tool, concretely relates to a petroleum screw rod drilling tool anti -drop device. BACKGROUND

[0002] The petroleum screw rod drilling tool is a downhole power drilling tool, which rotates the drill bit through a driving mechanism to realize drilling operation and is widely applied in the exploitation of petroleum, natural gas and other resources.

[0003] The drill pipes of the existing petroleum screw rod drilling tool are only connected through simple thread connection, which results in limited connection stability, and when the thread is loose or worn out, the drill pipes are prone to disconnection and falling, which brings great hidden troubles to the petroleum exploitation operation, therefore, the petroleum screw rod drilling tool anti -drop device is provided. UTILITY MODEL CONTENT

[0004] In view of the problems in the prior art, the utility model provides a petroleum screw rod drilling tool anti -drop device to provide a drill pipe device with anti -drop effect for screw rod drilling tool for petroleum operation, ensure the stability of the connection of the drill pipes connected in multiple sections in the well, and the anti -drop assembly is clamped to the drill pipes connected below in the natural falling state to ensure the stability of the connection between each drill pipe and realize the anti -drop effect.

[0005] The utility model solves the technical problems and adopts a petroleum screw rod drilling tool anti -drop device, which comprises drill pipes of the petroleum screw rod drilling tool and an anti -drop assembly for clamping adjacent drill pipes, the top and bottom of the drill pipe are respectively provided with a threaded interface and a threaded joint for the upper and lower connection of adjacent drill pipes, and the inner bottom of the drill pipe is provided with an annular protrusion extending inward and clamped with the anti -drop assembly.

[0006] By adopting the above technical scheme, the drill pipe provided with the annular protrusion and the anti -drop assembly provides a drill pipe device with anti -drop effect for screw rod drilling tool for petroleum operation, ensures the stability of the connection of the drill pipes connected in multiple sections in the well, and the anti -drop assembly is clamped to the drill pipes connected below in the natural falling state to ensure the stability of the connection between each drill pipe and realize the anti -drop effect.

[0007] Specifically, equidistant openings corresponding to the anti -drop assembly are arranged on the outer periphery of the bottom of the drill pipe, and mounting ears are arranged on the inner wall of the drill pipe and located on both sides of the openings.

[0008] Specifically, the anti -drop assembly comprises a C-shaped connecting rod, an upper ball head and a lower ball head, the upper ball head and the lower ball head are connected to the top and bottom of the C-shaped connecting rod respectively, and the upper ball head is located in the opening.

[0009] Specific, the C type connecting rod is rotatably connected with the mounting lug through a rotating shaft at one end close to the opening.

[0010] By adopting the technical scheme, after the adjacent drill pipes are connected through the threaded interfaces and the threaded joints, the C type connecting rod and the lower ball head at the bottom thereof are naturally dropped by gravity, and the annular protrusion in the lower drill pipe is clamped.

[0011] Specifically, the lower ball head at the bottom of the C type connecting rod extends from the bottom of the drill pipe in the natural dropping state and clamps the annular protrusion in the adjacent drill pipe at the bottom.

[0012] The drill pipe device with the anti-dropping effect for the screw rod drilling tool is provided for oil operation, the stability of the multi-section connected drill pipes in the well is ensured, the anti-dropping assembly is clamped to the connected drill pipe below in the natural dropping state, the stability of the connection between the drill pipes is ensured, the problem that the drill pipes are only connected through the simple threaded connection in the existing oil screw rod drilling tool, the connection stability is limited, and the drill pipes are prone to separation and dropping in the case of thread loosening or fatigue wear is solved, and the problem of great hidden danger to oil exploitation operation is solved. BRIEF DESCRIPTION OF DRAWINGS

[0013] The utility model is further described below in combination with the drawings and embodiments.

[0014] Figure 1 It is a schematic diagram of the drill pipe of the utility model;

[0015] Figure 2 It is a schematic diagram of the connection section of the adjacent drill pipes of the utility model;

[0016] Figure 3 It is a schematic diagram of the separation section of the adjacent drill pipes of the utility model;

[0017] Figure 4 It is a schematic diagram of the anti-dropping assembly of the utility model; Figure 2 It is an enlarged schematic diagram of the position A of the utility model;

[0018] In the drawing: drill pipe 1, threaded interface 11, threaded joint 12, annular protrusion 13, opening 2, mounting lug 21, anti-dropping assembly 3, C type connecting rod 31, upper ball head 32, lower ball head 33. DETAILED DESCRIPTION

[0019] In order to make the technical means, creative features, purposes and effects of the utility model easy to understand, the utility model is further described below in combination with the specific embodiments.

[0020] For example, Figures 1-4The utility model discloses a kind of petroleum screw drill anti-falling devices, including the drill pipe 1 of petroleum screw drill, and the anti-falling assembly 3 for the clamping between adjacent drill pipe 1, the drill pipe 1 top and bottom are respectively provided with the thread interface 11 and threaded joint 12 for the upper and lower connection of adjacent drill pipe 1, the inside bottom of drill pipe 1 is close to the end of threaded joint 12 and is provided with annular protrusion 13 that is inwardly extended and is used for the clamping of anti-falling assembly 3.

[0021] The utility model further includes, the bottom outer periphery of drill pipe 1 is equidistantly provided with the opening 2 corresponding with anti-falling assembly 3, and the inner wall of drill pipe 1 and located at the both sides of opening 2 are respectively provided with mounting lug 21.

[0022] The utility model further includes, the anti-falling assembly 3 includes C type connecting rod 31, upper ball head 32 and lower ball head 33, and upper ball head 32 and lower ball head 33 are connected to the top and bottom of C type connecting rod 31 respectively, and upper ball head 32 is located in opening 2.

[0023] The utility model further includes, one end of C type connecting rod 31 close to opening 2 is rotatably connected with mounting lug 21 by pivot.

[0024] When using, based on the setting of anti-falling assembly 3, after the adjacent drill pipe 1 of upper and lower is completed by thread connection through thread interface 11 and threaded joint 12, C type connecting rod 31 and lower ball head 33 of its bottom rely on gravity and naturally fall, realize the clamping of annular protrusion 13 in the drill pipe 1 of lower, after entering well, upper ball head 32 above C type connecting rod 31 is suppressed by well wall, is limited in opening 2, so that lower ball head 33 always keeps the clamping of annular protrusion 13 in the drill pipe 1 of lower, so that drill pipe 1 is in the period of drilling, adjacent drill pipe 1 is connected while relying on thread, based on the always kept clamping connection state of anti-falling assembly 3, better anti-falling effect is played.

[0025] The utility model further includes, lower ball head 33 of the bottom of C type connecting rod 31 is in the state of natural falling and extends drill pipe 1 bottom, and clamps annular protrusion 13 in the drill pipe 1 of adjacent bottom.

[0026] The utility model discloses a threaded connection of the drill rod 1 is realized through the C type connecting rod 31, and the C type connecting rod 31 is provided with the upper ball head 32 and the lower ball head 33, and the upper ball head 32 and the lower ball head 33 are provided with the annular protrusion 13, and the annular protrusion 13 is provided with the anti -drop assembly 3, and the anti -drop assembly 3 is provided with the threaded connection 11 and the threaded joint 12.

[0027] The basic principle, main features and advantages of the utility model are shown and described above. Those skilled in the art should understand that the utility model is not limited to the above-mentioned embodiments, and the above-mentioned embodiments and the description in the specification are only to illustrate the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model can have various changes and improvements, and these changes and improvements all fall within the scope of the utility model. The scope of protection of the utility model is defined by the appended claims and their equivalents.

Claims

1. A petroleum screw drill drop-out prevention device, characterized by, The application relates to a drill rod (1) comprising an oil screw rod and a falling-prevention assembly (3) for clamping adjacent drill rods (1), wherein the top and bottom of the drill rod (1) are respectively provided with a threaded interface (11) and a threaded joint (12) for connecting the adjacent drill rods (1) upward and downward, and the inner bottom of the drill rod (1) is provided with an annular protrusion (13) extending inward and clamped with the falling-prevention assembly (3) at one end close to the threaded joint (12).

2. The falling prevention device for a petroleum screw drill according to claim 1, wherein The outer periphery of the bottom of the drill rod (1) is provided with an opening (2) corresponding to the falling-prevention assembly (3) at equal intervals, and the inner wall of the drill rod (1) is provided with mounting ears (21) on both sides of the opening (2).

3. The falling prevention device for a petroleum screw drill according to claim 2, wherein The falling-prevention assembly (3) comprises a C-shaped connecting rod (31), an upper ball head (32) and a lower ball head (33), wherein the upper ball head (32) and the lower ball head (33) are respectively connected to the top and bottom of the C-shaped connecting rod (31), and the upper ball head (32) is located in the opening (2).

4. The falling prevention device for a petroleum screw drill according to claim 3, wherein One end of the C-shaped connecting rod (31) close to the opening (2) is rotationally connected with the mounting ear (21) through a rotating shaft.

5. The falling prevention device for a petroleum screw drill according to claim 4, wherein The lower ball head (33) at the bottom of the C-shaped connecting rod (31) extends out of the bottom of the drill rod (1) in a natural falling state and is clamped with the annular protrusion (13) in the adjacent drill rod (1).

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