CN217481185U - Novel anti-tripping shell thread structure and screw drill - Google Patents

Abstract

The utility model discloses a novel thread structure of an anti-tripping shell and a screw drill, wherein the thread structure is applied to the connection of a cardan shaft and a motor, the cardan shaft comprises a lower shell arranged outside and a living hinge joint arranged inside, and the motor comprises an upper shell arranged outside and a rotor joint arranged inside; an inner torque shoulder, an internal thread and a pin unthreaded hole are sequentially arranged on the upper shell from left to right; the lower shell is sequentially provided with an outer torque shoulder, an external thread and a pin threaded hole from left to right, and the pin unthreaded hole and the pin threaded hole are radially arranged and correspond in position; the rotor joint is in threaded connection with the movable hinge joint. The utility model provides a novel anti-tripping shell thread structure and screw rod drilling tool have improved joint strength, greatly reduced the emergence probability of "dropout", and the cost is lower, improved the efficiency of production, be convenient for promote in the industry and use.

Description

Novel anti-tripping shell thread structure and screw drill

Technical Field

The utility model relates to an oil drilling equipment technical field especially relates to a novel anti-disengaging casing helicitic texture and screw rod drilling tool.

Background

The screw drilling tool is a positive displacement downhole power drilling tool which takes drilling fluid as a power source and converts liquid pressure energy into mechanical energy. The screw drilling tool includes transmission shaft, cardan shaft, motor, anti-drop device and bypass valve etc. and the life of conventional screw drilling tool generally is within 150 hours, and its weak link has a lot, wherein takes place occasionally between cardan shaft and the motor, "trips", seriously influences product life and well drilling safety, urgently needs to solve. In order to solve the problem of 'tripping', the method generally adopted in the prior art is to coat anaerobic adhesive, increase the torque of the upper shackle and resist the impact of high-pressure mud and the risk of thread failure caused by various external complex stresses and vibrations by improving the thread torque of the upper shackle.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the purpose of the application is to provide a novel thread structure of an anti-tripping shell and a screw drill.

In order to achieve the purpose of the application, the technical scheme provided by the application is as follows:

first aspect

The application provides a novel anti-tripping shell thread structure which is applied to connection of a universal shaft and a motor, wherein the universal shaft comprises a lower shell arranged on the outside and a movable hinge joint arranged on the inside, and the motor comprises an upper shell arranged on the outside and a rotor joint arranged on the inside;

an inner torque shoulder, an internal thread and a pin unthreaded hole are sequentially arranged on the upper shell from left to right; the lower shell is sequentially provided with an outer torque shoulder, an external thread and a pin threaded hole from left to right, and the pin unthreaded hole and the pin threaded hole are radially arranged and correspond in position;

the inner thread of the upper shell is connected with the outer thread of the lower shell, the inner torque shoulder is connected with the outer torque shoulder, and the anti-falling pin penetrates through the pin unthreaded hole to be connected with the pin threaded hole, so that the upper shell and the lower shell are fixedly connected by the anti-falling pin in the radial direction;

the rotor joint is in threaded connection with the movable hinge joint.

Wherein, pin unthreaded hole evenly distributed is in go up on the outer circumference of casing, the position corresponds ground, pin screw hole evenly distributed is in down on the casing, the quantity of pin unthreaded hole and pin screw hole is 4, correspondingly, the quantity of anticreep pin is 4.

And the distance from the pin unthreaded hole to the pipe end is equal to the distance from the pin threaded hole to the shoulder surface.

The inner torque shoulder and the outer torque shoulder are in interference fit, and the interference magnitude is 0.10 mm.

Second aspect of the invention

The application provides a screw drilling tool, including transmission shaft, cardan shaft, motor, anti-drop device and bypass valve, still include as foretell novel anti-drop casing helicitic texture.

Compared with the prior art, the beneficial effects of the utility model are that, the novel anti-tripping shell thread structure and the screw rod drilling tool that this application provided have improved joint strength, greatly reduced the emergence probability of "dropout", and the cost is lower, improved the efficiency of production, be convenient for promote in the industry and use.

Drawings

Fig. 1 is a schematic structural diagram of a novel anti-tripping shell thread structure of the present application:

fig. 2 is a schematic structural diagram of an upper shell end part of the present application:

fig. 3 is a schematic view of the end structure of the housing of the present application:

FIG. 4 is a schematic view of the whole screw drill:

in the figure: 1-upper shell, 2-anti-drop pin, 3-lower shell, 4-rotor joint, 5-movable hinge joint, 6-internal torque shoulder, 7-internal thread, 8-pin threaded hole, 9-external torque shoulder, 10-external thread, 11-pin threaded hole, 21-transmission shaft, 22-universal shaft, 23-motor, 24-anti-drop device, 25-bypass valve, L2-distance between pin threaded hole and shoulder surface, and L1 is distance from pin unthreaded hole to pipe end.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.

The present invention will be described in further detail with reference to the following drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when used in this specification the singular forms "a", "an" and/or "the" include "specify the presence of stated features, steps, operations, elements, or modules, components, and/or combinations thereof, unless the context clearly indicates otherwise.

As used herein, the singular forms "a," "an," "the," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

It will be understood that when an element is referred to herein as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Example 1

As shown in fig. 1 to 3, the novel thread structure of the anti-tripping housing provided in this embodiment is applied to the connection between a universal shaft 22 and a motor 23 of a screw drill, where the universal shaft 22 includes a lower housing 3 disposed on the outside and a living hinge 5 disposed on the inside, and the motor 23 includes an upper housing 1 disposed on the outside and a rotor joint 4 disposed on the inside;

an inner torque shoulder 6, an internal thread 7 and a pin unthreaded hole 8 are sequentially arranged on the upper shell 1 from left to right; an outer torque shoulder 9, an external thread 10 and a pin threaded hole 11 are sequentially arranged on the lower shell 3 from left to right, and the pin unthreaded hole 8 and the pin threaded hole 11 are radially arranged and correspond in position;

the internal thread 7 of the upper shell 1 is connected with the external thread 10 of the lower shell 3, the internal torque shoulder 6 is connected with the external torque shoulder 9, and the anti-falling pin 2 passes through the pin unthreaded hole 8 to be connected with the pin threaded hole 11, so that the upper shell 1 and the lower shell 3 are fixedly connected by the anti-falling pin 2 in the radial direction;

the rotor joint 4 is in threaded connection with the movable hinge joint 5.

In a preferred embodiment, the pin unthreaded holes 8 are uniformly distributed on the outer circumference of the upper shell 1, the pin threaded holes 11 are uniformly distributed on the lower shell 3 correspondingly, the number of the pin unthreaded holes 8 and the number of the pin threaded holes 11 are 4, and correspondingly, the number of the anti-falling pins 2 is 4.

In a preferred embodiment, pin light hole 8 to tube end distance L1 is pin screw hole 11 to shoulder surface distance L2.

In the preferred embodiment, the inner torque shoulder 6 is an interference fit with the outer torque shoulder 9 by 0.10 mm.

Example 2

As shown in fig. 4, the present embodiment provides a progressive cavity drill, which includes a transmission shaft 21, a cardan shaft 22, a motor 23, an anti-drop device 24, a bypass valve 25, and a novel thread structure of the anti-drop casing in embodiment 1.

The technical means not described in detail in the present application are known techniques.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.

Claims (5)

1. The novel thread structure of the anti-tripping shell is characterized by being applied to connection of a universal shaft (22) and a motor (23), wherein the universal shaft (22) comprises a lower shell (3) arranged outside and a movable hinge joint (5) arranged inside, and the motor (23) comprises an upper shell (1) arranged outside and a rotor joint (4) arranged inside;

an inner torque shoulder (6), an internal thread (7) and a pin unthreaded hole (8) are sequentially arranged on the upper shell (1) from left to right; an outer torque shoulder (9), an external thread (10) and a pin threaded hole (11) are sequentially arranged on the lower shell (3) from left to right, and the pin unthreaded hole (8) and the pin threaded hole (11) are radially arranged and correspond in position;

the internal thread (7) of the upper shell (1) is connected with the external thread (10) of the lower shell (3), the internal torque shoulder (6) is connected with the external torque shoulder (9), and the anti-falling pin (2) penetrates through the pin unthreaded hole (8) to be connected with the pin threaded hole (11), so that the upper shell (1) and the lower shell (3) are fixedly connected by the anti-falling pin (2) in the radial direction;

the rotor joint (4) is in threaded connection with the movable hinge joint (5).

2. The novel thread structure of the anti-tripping shell is characterized in that pin unthreaded holes (8) are uniformly distributed on the outer circumference of the upper shell (1) and correspondingly, pin threaded holes (11) are uniformly distributed on the lower shell (3), the number of the pin unthreaded holes (8) and the number of the pin threaded holes (11) are 4, and correspondingly, the number of the anti-tripping pins (2) is 4.

3. The novel thread structure of trip preventing casing as claimed in claim 1, wherein said pin light hole (8) to tube end distance (L1) is pin screw hole (11) to shoulder surface distance (L2).

4. The novel thread structure of the anti-trip shell according to claim 1, characterized in that the inner torque shoulder (6) and the outer torque shoulder (9) are in interference fit, and the interference is 0.10 mm.

5. A progressive cavity drill, characterized by comprising a drive shaft (21), a cardan shaft (22), a motor (23), an anti-trip device (24) and a bypass valve (25), further comprising a novel anti-trip housing thread structure according to any one of claims 1-4.

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