CN216665590U - Double protection structure for preventing cable from being twisted and broken - Google Patents

Abstract

The utility model discloses a double protection structure for preventing a cable from being twisted and broken, which comprises a faucet, a rotary short section, a host and an execution module, wherein the faucet is connected with the host through a cable connecting rod; the method is characterized in that: the bridle head, the rotary short section, the host and the execution module are sequentially connected from top to bottom; a detection rotation module is arranged in the main machine, and an anti-rotation arm is arranged at the bottom of the main machine; the detection rotating module is composed of a gyroscope; the rotary short section consists of an upper rotary assembly and a lower rotary assembly; the upper rotating assembly and the lower rotating assembly can be connected in a relatively rotating mode. The utility model adopts the gyroscope and the rotary short section to carry out double protection on the cable, thereby improving the reliability of the whole scheme; the whole structure is relatively simple, the cost is low, the dismounting is convenient, the maintenance is easy, and the arrangement of other underground functional modules is not influenced. The utility model is suitable for the condition that the cable needs to be prevented from being twisted and broken when the underground instrument with rotary action works, and effectively improves the working reliability of the underground instrument.

Description

Double protection structure for preventing cable from being twisted and broken

Technical Field

The utility model relates to a double protection structure for preventing a cable from being twisted and broken, and belongs to the technical field of underground instrument cable protection.

Background

During well testing or logging tests, a mode of hanging a downhole instrument under a test cable is often adopted for testing. The test cable is used as a connection point of the ground device and the underground instrument, so that mechanical connection is realized, and electric connection of power supply and bidirectional communication is realized. In the testing process, when the instrument rotates seriously, accidents such as cable twisting and breaking, instrument falling and the like can be caused, and even the well-lifting operation after fishing failure is caused. The problems not only delay the whole operation progress and waste time, but also greatly increase the production cost. The existing oil field lacks an effective cable twisting-off prevention protection device, so that workers can roughly judge the rotation condition of a cable only through experiences such as the condition of a wellhead cable, the lifting and placing condition and the like when using the underground instrument, and the existing oil field lacks more intuitive and reliable active twisting-off prevention measures. Therefore, the prior art still has the defects and needs to be further improved.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a double protection structure for preventing a cable from being twisted and broken so as to solve the problem that the cable is prevented from being twisted and broken when a downhole instrument rotates, improve the working reliability of the downhole instrument and overcome the defects of the prior art.

In order to achieve the purpose, the utility model adopts the following technical scheme:

the utility model discloses a double protection structure for preventing a cable from being twisted and broken, which comprises a faucet, a rotary short section, a host and an execution module; the method is characterized in that: the bridle head, the rotary short section, the host and the execution module are sequentially connected from top to bottom; a detection rotation module is arranged in the main machine, and an anti-rotation arm is arranged at the bottom of the main machine; the detection rotating module is composed of a gyroscope; the rotary short section consists of an upper rotary assembly and a lower rotary assembly; the upper rotating assembly and the lower rotating assembly can be connected in a relatively rotating mode.

In the double protection structure, the top end of the horse head is connected with the test cable.

Due to the adoption of the technical scheme, compared with the prior art, the utility model uses a gyroscope or other types of detection rotation modules to monitor the self-rotation angle of the instrument in real time; a user can more intuitively and effectively know the autorotation condition of the instrument; a high-precision gyroscope is not needed; the functions can be realized by the ordinary low-precision gyroscope, so that the cost is saved; the relatively mature rotary short section is used for solving the problem that the cable is driven to rotate by the autorotation of the instrument, and the application of the rotary short section is expanded; the mechanical rotary short section is used as a supplement to an electric gyro scheme, and the reliability of the whole scheme is further improved by a double-protection structure; the whole structure is relatively simple, the cost is low, the dismounting is convenient, the maintenance is easy, and the arrangement of other underground functional modules is not influenced. The utility model is suitable for the condition that the cable needs to be prevented from being twisted and broken when the underground instrument with rotary action works, and effectively improves the working reliability of the underground instrument.

Drawings

Fig. 1 is a schematic structural view of the present invention.

The labels in the figures are: the device comprises a 1-spigot, a 2-rotary short section, a 3-host, a 4-execution module, a 5-rotary body, a 6-rotation prevention arm, a 7-detection rotary module, an 8-lower rotary component, a 9-upper rotary component and a 10-test cable.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples.

The utility model is formed according to a double protection method for preventing the cable from being twisted and broken, as shown in figure 1, the method is that a detection rotating module 7 is added in a main machine 3 to continuously detect the rotation condition of the main machine 3; when the detection rotation module 7 detects that the host 3 rotates, the rotation angle is automatically accumulated; when the rotation angle reaches the set value of the instrument, the detection rotation module 7 feeds back the rotation angle to the control module in the host 3 to control the rotation of the rotating body 5 to stop, so that the cable twisting accident is prevented; when the detection rotation module 7 is out of work, double protection is realized by the rotary short section 2. The detection rotating module 7 adopts a gyroscope, and the gyroscope detects the rotation of the host 3.

The double protection structure for preventing the cable from being twisted and broken, which is formed according to the method, comprises a spigot 1, a rotary short section 2, a main machine 3 and an execution module 4, as shown in figure 1; the horse faucet 1, the rotary short section 2, the host 3 and the execution module 4 are sequentially connected from top to bottom; the inside of the main machine 3 is provided with a detection rotation module 7, and the bottom of the main machine 3 is provided with an anti-rotation arm 6. The detection rotation module 7 is composed of a gyro. The rotary short section 2 consists of an upper rotary component 9 and a lower rotary component 8; the upper rotating assembly 9 and the lower rotating assembly 8 are connected in a relatively rotatable manner by adopting a conventional relatively rotatable connection manner; and finally, connecting the top end of the faucet 1 with a test cable 10.

The working process and principle of the utility model are explained as follows:

when a well is tested or logged and a downhole instrument is hung by a test cable to work, the host 3 controls the rotating body 5 to rotate forward and backward or stop; the gyroscope 7 continuously detects the rotation condition of the host 3; if the anti-rotation arm 6 is in accident and anti-rotation failure in the rotation process of the rotating body 5, the rotating body 5 can be clamped and does not rotate any more, and the main machine 3 rotates in the opposite direction; after the gyro 7 detects that the host 3 rotates, automatically accumulating the rotation angle; when the rotation angle reaches the set value of the instrument, the gyroscope 7 feeds back to a control module in the host 3 to control the rotating body 5 to stop rotating, and the gyroscope controls the downhole instrument to stop rotating after the anti-rotating arm fails;

if the detection stalling function of the gyro 7 is also invalid, the main machine 3 part continues to rotate; but due to the existence of the rotary short section 2, the rotation of the main machine part can not cause the large-angle rotation of the faucet 1, and the twisting and the falling of the test cable 10 can not be caused.

In specific implementation, the utility model mainly comprises a bridle 1, a rotary pup joint 2, a host 3 and an execution module 4.

The bridle 1 plays a role in mechanical connection and electrical connection between the test cable 10 and an underground instrument, and the bridle 1 adopts common components in oil fields.

The rotary short section 2 consists of an upper rotary component 9 and a lower rotary component 8, the rotating torque between the upper rotary component 9 and the lower rotary component 8 is very small, and when one component rotates, the other component cannot follow the rotation or the rotating amount is very small. The swivel sub 2 is typically used for the following purposes: firstly, when the underground instrument is not required to rotate, the cable is prevented from twisting to drive the underground instrument to rotate; and secondly, when the underground instrument needs to rotate, the instrument string is connected to facilitate the rotation of the instrument. The utility model changes its use to that the rotation of the instrument does not cause the cable to rotate. Specifically, when the host machine 3 drives the lower rotating assembly 8 to rotate, the upper rotating assembly 9 cannot drive the faucet 1 to rotate, and the test cable 10 cannot be twisted.

The main machine 3 is a control and detection part of the underground instrument, and a gyroscope 7 or other types of detection rotation modules are arranged in the main machine 3 and used for detecting whether the main machine part rotates axially or not. The bottom of the main machine is provided with an anti-rotation arm 6 which is matched with structures such as a groove, a notch and the like in the downhole tool to prevent the main machine from axially rotating when the instrument works.

The moving part of the actuating module 4 is a rotating body 5. Under the normal anti-rotation state of the anti-rotation arm 6, the main machine 3 controls the rotation body 5 to rotate forwards and backwards or stop through the control motor, so that the operations of underground adjustment, descaling and the like can be realized.

Claims (2)

1. A double protection structure for preventing a cable from being twisted off comprises a faucet (1), a rotary short section (2), a host (3) and an execution module (4); the method is characterized in that: the horse faucet (1), the rotary short section (2), the host (3) and the execution module (4) are sequentially connected from top to bottom; a detection rotation module is arranged in the main machine (3), and an anti-rotation arm (6) is arranged at the bottom of the main machine (3); the detection rotating module is composed of a gyroscope (7); the rotary short section (2) consists of an upper rotary assembly (9) and a lower rotary assembly (8); the upper rotating component (9) and the lower rotating component (8) can be connected in a relatively rotating way.

2. The dual protection architecture of claim 1, wherein: the top end of the horse faucet (1) is connected with a test cable (10).

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