A hydraulic oscillator

Abstract

The present application provides a hydraulic oscillator, including an oscillation module and a control module; the oscillation module includes a stationary joint, a stator and a rotor; the rotor is rotatably mounted in the stator; a rotor center channel and a rotor side channel are provided on the rotor; one end of the stationary joint is inserted in the stator, and a joint center channel corresponding to the rotor center channel and a joint side channel corresponding to the rotor side channel are provided on the stator; the control module includes a control housing and a controller, a motor telescopic module and a small valve head arranged in the control housing; the controller is connected to the motor telescopic module, and drives the small valve head to be inserted into or pulled out of the rotor center channel by controlling the motor telescopic module. The hydraulic oscillator provided in the present application does not work in the case of composite drilling, but works in the case of directional drilling, that is, provides axial force, and does not cause any impact on other equipment.

Description

Technical Field

[0001] The present application relates to the field of drilling technology, and in particular to a hydraulic oscillator. Background Art

[0002] With the development of the petroleum industry, there are more and more ways to drill oil fields, such as directional drilling, composite drilling, etc. Oil field drilling cannot be separated from hydraulic oscillators, but the existing hydraulic oscillators cannot be adjusted accordingly according to different drilling methods. Summary of the invention

[0003] The purpose of this application is to provide a hydraulic oscillator to address the above problems.

[0004] The present application provides a hydraulic oscillator, comprising an oscillation module and a control module;

[0005] The oscillation module comprises a stationary joint, a stator and a rotor; the rotor is rotatably mounted in the stator; the rotor is provided with a rotor central channel and a rotor side channel; one end of the stationary joint is inserted in the stator, and a joint central channel corresponding to the rotor central channel and a joint side channel corresponding to the rotor side channel are provided on the stator;

[0006] The control module includes a control shell and a controller, a motor telescopic module and a small valve head arranged in the control shell; the controller is connected to the motor telescopic module, and drives the small valve head to be inserted into or pulled out of the rotor center channel by controlling the motor telescopic module.

[0007] According to the technical solutions provided in certain embodiments of the present application, the number of the rotor side channels and the number of the joint side channels are both four; the four rotor side channels are evenly distributed along the circumference of the rotor; the four joint side channels are evenly distributed along the circumference of the stationary joint; the diameter size of the rotor side channel is consistent with the diameter size of the joint side channel.

[0008] According to the technical solution provided in certain embodiments of the present application, the motor telescopic module includes a motor; the output end of the motor is fixedly connected to a lead screw; a lead screw nut is threadedly connected to the lead screw; and the small valve head is connected to the lead screw nut.

[0009] According to the technical solutions provided in some embodiments of the present application, a stabilizing ring is installed at one end of the stator away from the stationary joint; the stabilizing ring is sleeved on the outer wall of the rotor.

[0010] According to the technical solutions provided in certain embodiments of the present application, a battery module is further provided in the control housing; the battery module is used to supply power to the controller and the motor telescopic module.

[0011] Compared with the prior art, the present application has the following beneficial effects: when the hydraulic oscillator is in use, the controller detects the rotation of the drilling pipe in real time, and controls the motor telescopic module to drive the small valve head to insert into or pull out from the rotor center channel according to the detected rotation of the drilling pipe, thereby achieving the purpose of controlling the internal fluid channel of the hydraulic oscillator, thereby achieving the hydraulic oscillator not working in the case of composite drilling and working in the case of directional drilling, that is, providing axial force, and at the same time having no impact on other equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 A schematic diagram of the structure of a hydraulic oscillator provided in an embodiment of the present application;

[0013] Figure 2 A schematic structural diagram of the rotor of the hydraulic oscillator provided in an embodiment of the present application.

[0014] The text annotations in the figure represent:

[0015] 1. Stationary joint; 2. Stator; 3. Rotor; 4. Rotor center channel; 5. Rotor side channel; 6. Joint center channel; 7. Joint side channel; 8. Controller; 9. Small valve head; 10. Motor telescopic module; 11. Righting ring; 12. Battery module. DETAILED DESCRIPTION

[0016] In order to enable those skilled in the art to better understand the technical solution of the present application, the present application is described in detail below in conjunction with the accompanying drawings. The description in this section is only exemplary and explanatory and should not have any limiting effect on the scope of protection of the present application.

[0017] Please refer to Figure 1 and Figure 2 This embodiment provides a hydraulic oscillator, which is connected to a drilling string and includes an oscillation module and a control module.

[0018] The oscillation module includes a stationary joint 1, a stator 2 and a rotor 3; the rotor 3 is rotatably installed in the stator 2; the rotor 3 is a screw; a rotor center channel 4 and a rotor side channel 5 are provided on the rotor 3; one end of the stationary joint 1 is inserted in the stator 2, and a joint center channel 6 corresponding to the rotor center channel 4 and a joint side channel 7 corresponding to the rotor side channel 5 are provided thereon; the number of the rotor side channels 5 and the joint side channels 7 are both four; the four rotor side channels 5 are evenly distributed along the circumference of the rotor 3; the four joint side channels 7 are evenly distributed along the circumference of the stationary joint 1; the diameter size of the rotor side channel 5 is consistent with the diameter size of the joint side channel 7; the diameter size of the joint center channel 6 is consistent with the diameter size of the rotor center channel 4; a stabilizing ring 11 is installed at one end of the stator 2 away from the stationary joint 1; the stabilizing ring 11 is sleeved on the outer wall of the rotor 3.

[0019] The control module includes a control shell and a controller 8, a motor telescopic module 10 and a small valve head 9 arranged in the control shell; the controller 8 is connected to the motor telescopic module 10, and drives the small valve head 9 to be inserted into or pulled out of the rotor center channel 4 by controlling the motor telescopic module 10; the motor telescopic module 10 includes a motor; the output end of the motor is fixedly connected to the lead screw; a lead screw nut is threaded on the lead screw; the small valve head 9 is connected to the lead screw nut; a battery module 12 is also provided in the control shell; the battery module 12 is used to power the controller 8 and the motor telescopic module 10.

[0020] When the hydraulic oscillator provided in this embodiment is in use, the controller 8 detects the rotation of the drilling pipe in real time, and controls the motor to rotate accordingly according to the detected rotation. Specifically, the controller 8 detects in real time whether the drilling pipe rotates within 60 seconds. When no rotation occurs (i.e., it corresponds to the situation of directional drilling), the controller controls the motor to rotate, and the motor drives the small valve head 9 to insert into the rotor center channel 4 through the screw and the screw nut, and the rotor center channel 4 is blocked. The mud passes between the rotor 3 and the stator 2, and the pressure difference of the mud begins to be consumed. The rotor 3 rotates relative to the stator 2, and the stationary joint 1 and The rotor 3 generates relative rotation, so that the relative position of the joint side channel 7 and the rotor side channel 5 changes periodically, so that the amount of mud passing through also changes periodically. Since the total displacement of the mud remains unchanged, the pressure difference will change periodically, that is, a periodic axial force will be generated; when rotation occurs (i.e., it corresponds to the case of composite drilling), the controller 8 controls the motor to rotate in the opposite direction, thereby driving the small valve head 9 to disengage from the rotor center channel 4, and the mud passes through the rotor center channel 4. The rotor 3 and the stator 2 do not digest the mud pressure difference, so no axial force is generated, that is, the rotor 3 will not rotate relative to the stator 2. The hydraulic oscillator does not work in the case of composite drilling, and works in the case of directional drilling, that is, it provides axial force, and does not cause any impact on other equipment.

[0021] This article uses specific examples to illustrate the principles and implementation methods of this application. The description of the above embodiments is only used to help understand the method and its core ideas of this application. The above is only the preferred implementation method of this application. It should be pointed out that due to the limitations of textual expression and the objective existence of infinite specific structures, ordinary technicians in this technical field can make several improvements, modifications or changes without departing from the principles of the present invention, and can also combine the above technical features in an appropriate manner; these improvements, modifications, changes or combinations, or the direct application of the inventive concept and technical solution to other occasions without improvement, should be regarded as the scope of protection of this application.

Claims

1. A hydraulic oscillator, characterized in that: It includes an oscillation module and a control module; The oscillation module comprises a stationary joint (1), a stator (2) and a rotor (3); the rotor (3) is rotatably mounted in the stator (2); the rotor (3) is provided with a rotor center channel (4) and a rotor side channel (5); one end of the stationary joint (1) is inserted in the stator (2), and is provided with a joint center channel (6) corresponding to the rotor center channel (4) and a joint side channel (7) corresponding to the rotor side channel (5); The control module comprises a control housing, a controller (8), a motor telescopic module (10) and a small valve head (9) arranged in the control housing; the controller (8) is connected to the motor telescopic module (10), and drives the small valve head (9) to be inserted into or removed from the rotor central channel (4) by controlling the motor telescopic module (10).

2. The hydraulic oscillator according to claim 1, characterized in that: The number of the rotor side channels (5) and the number of the joint side channels (7) are both four; the four rotor side channels (5) are evenly distributed along the circumference of the rotor (3); the four joint side channels (7) are evenly distributed along the circumference of the stationary joint (1); and the diameter of the rotor side channel (5) is consistent with the diameter of the joint side channel (7).

3. The hydraulic oscillator according to claim 1, characterized in that: The motor telescopic module (10) comprises a motor; the output end of the motor is fixedly connected to a lead screw; a lead screw nut is threadedly connected to the lead screw; and the small valve head (9) is connected to the lead screw nut.

4. The hydraulic oscillator according to claim 1, characterized in that: A stabilizing ring (11) is installed at one end of the stator (2) away from the stationary joint (1); the stabilizing ring (11) is sleeved on the outer wall of the rotor (3).

5. The hydraulic oscillator according to claim 1, characterized in that: A battery module (12) is also provided in the control housing; the battery module (12) is used to supply power to the controller (8) and the motor telescopic module (10).

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