Ball-starting multi-head hydraulic oscillator

Abstract

The utility model belongs to the technical field of hydraulic oscillators, and specifically relates to a ball-dropping-starting multi-head hydraulic oscillator, including a lower flexible joint, a control valve housing, an adjustment sleeve, a fixed valve, a wear-resistant alloy sleeve, a movable valve, a movable valve seat, a lower flexure shaft joint, a universal shaft housing, a flexure shaft, a pin, an upper flexure shaft joint, a multi-head stator, a hollow multi-head rotor, a soluble composite fracturing ball and an upper flexible joint. The hydraulic oscillator is turned on by the ball drop on demand, and can be freely turned on in the well section where the hydraulic oscillator is required to work. The on-demand ball drop switch hydraulic oscillator improves the transmission of drilling pressure during drilling in well sections with large friction resistance, reduces the sticking of the drill tool assembly, and improves the efficiency of directional drilling; in well sections with small friction resistance, the ball drop multi-head hydraulic oscillator may not work, thereby increasing the effective working time of the hydraulic oscillator underground, reducing pump consumption, and reducing costs and increasing efficiency.

Description

Technical Field

[0001] The utility model belongs to the technical field of hydraulic oscillators, and in particular relates to a ball-throwing-starting multi-head hydraulic oscillator. Background Art

[0002] The hydraulic oscillator system improves the effectiveness of drilling pressure transmission during drilling and reduces the friction between the lower drilling tool assembly and the wellbore through the longitudinal vibration generated by itself. This means that the hydraulic impact system can improve the transmission of drilling pressure and reduce torsional vibration during directional drilling with screw drilling tools. With the increase in the number of large-displacement wells and the continuous extension of horizontal displacement, its drilling mode faces greater challenges. Traditional hydraulic oscillators have large friction in the well due to their own structural problems, making the tool face difficult to control and the drilling efficiency low. Utility Model Content

[0003] The utility model aims to provide a ball-throwing-starting multi-head hydraulic oscillator to solve the problems existing in the prior art.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a ball-starting multi-head hydraulic oscillator, comprising a lower flexible joint, a control valve housing, an adjustment sleeve, a fixed valve, a wear-resistant alloy sleeve, a movable valve, a movable valve seat, a lower flexible shaft joint, a universal shaft housing, a flexible shaft, a pin, an upper flexible shaft joint, a multi-head stator, a hollow multi-head rotor, a soluble composite fracturing ball and an upper flexible joint; the adjustment sleeve is installed in the control valve housing, the fixed valve is installed on one side of the adjustment sleeve, the wear-resistant alloy sleeve is installed in the control valve housing and slidably cooperates with the movable valve seat, the movable valve is connected to the movable valve seat, the movable valve cooperates with the static valve, and the movable valve seat is connected to the One end of the lower flexible shaft joint is connected, one end of the lower flexible shaft joint is connected to one end of the flexible shaft through the pin, the other end of the flexible shaft is connected to the upper flexible shaft joint through the pin, the upper flexible shaft joint is connected to the hollow multi-head rotor, the hollow multi-head rotor is located in the multi-head stator and rollingly cooperates with it, the lower end of the hollow multi-head rotor is provided with a ball basket, the soluble composite fracturing ball cooperates with the hollow multi-head rotor, one end of the multi-head stator is connected to the upper flexible joint, and the other end is connected to one end of the universal shaft housing, the other end of the universal shaft housing is connected to one end of the control valve housing, and the other end of the control valve housing is connected to the lower flexible joint.

[0005] Preferably, an adjustment ring is installed in the control valve housing, the adjustment ring is connected to one end of the wear-resistant alloy sleeve and is clamped at the step of the control valve housing. The position of the wear-resistant alloy sleeve can be adjusted by setting the adjustment ring, thereby increasing the service life of the movable valve seat.

[0006] Preferably, strip-shaped holes are provided around the ball basket.

[0007] Preferably, the middle part of the hollow multi-head rotor is provided with an arc-shaped shoulder for supporting the soluble composite fracturing ball, and the surface of the arc-shaped shoulder matches the shape of the soluble composite fracturing ball to improve the sealing performance.

[0008] Preferably, the soluble composite fracturing ball is made of soluble material.

[0009] Preferably, the movable valve, the fixed valve and the fixed valve seat are respectively provided with through holes.

[0010] The beneficial effects of the utility model are:

[0011] The hydraulic oscillator can be turned on and off as needed, and can be turned on freely in the well section where the hydraulic oscillator is needed. The hydraulic oscillator can be turned on and off as needed to improve the transmission of drilling pressure during drilling in well sections with large friction resistance, reduce the sticking of the drill bit assembly, and improve the efficiency of directional drilling; in well sections with small friction resistance, the multi-head hydraulic oscillator can be turned off, which increases the effective working time of the hydraulic oscillator underground, reduces pump consumption, and reduces costs and increases efficiency.

[0012] The density of the soluble composite fracturing ball can be adjusted according to the working time required underground to meet the working time. After the ball dissolves, it will not affect the normal use of other tools.

[0013] When the ball is thrown or dissolved, the multi-head hydraulic oscillator can be used for plugging operations.

[0014] It effectively increases the working time of the hydraulic oscillator underground, reduces the high pressure time on the pumping equipment, and reduces costs and increases efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the utility model;

[0016] Figure 2 It is a partial enlarged view of the utility model. DETAILED DESCRIPTION

[0017] The specific implementation of the utility model is described in detail below with reference to the accompanying drawings and preferred embodiments.

[0018] like Figure 1-2As shown, a ball-starting multi-head hydraulic oscillator comprises a lower flexible joint 1, a control valve housing 2, an adjustment sleeve 3, a fixed valve 4, a wear-resistant alloy sleeve 5, an adjustment ring 6, a movable valve 7, a movable valve seat 8, a lower flexible shaft joint 9, a universal shaft housing 10, a flexible shaft 11, a pin 12, an upper flexible shaft joint 13, a multi-head stator 14, a hollow multi-head rotor (with a ball basket) 15, a soluble composite fracturing ball 16, and an upper flexible joint 17; the movable valve 7 is connected to the movable valve seat 8; the lower flexible shaft joint 9 is installed in the flexible shaft 11; the pin 12 is installed in the lower flexible shaft 9 joint; the upper flexible shaft joint 13 is connected to the flexible shaft 11 through the pin 12; the pin 12 is installed in the upper The movable valve seat 8 is connected with the lower flexible shaft joint 9; the movable valve seat 8 and the flexible shaft assembly are installed in the control valve housing 2; the fixed valve 4 is installed in the control valve housing 2; the adjustment sleeve 3 is installed in the control valve housing 2; the lower flexible joint 1 is connected with the control valve housing 2; the upper flexible shaft joint 13 is connected with the hollow multi-head rotor 15; the universal shaft housing 10 is connected with the control valve housing 2; the multi-head stator 14 is connected with the universal shaft housing 10; the soluble fracturing ball 16 is put into the hollow multi-head rotor 15.

[0019] This problem is solved in a simple and effective way, and a unique and effective approach is proposed. The multi-head hydraulic oscillator is turned on and off by dropping soluble composite fracturing balls. In the well section with large friction and heavy support pressure, the multi-head hydraulic oscillator is turned on by dropping balls; in the well section without hydraulic oscillators, the soluble composite fracturing balls do not need to be dropped; the soluble composite fracturing balls automatically dissolve after a period of use, thereby realizing the on-demand opening of the ball-started multi-head hydraulic oscillator, reducing the high-pressure working time on the pumping equipment. The working time of hydraulic oscillation in the well is effectively improved. Smooth drilling pressure transmission reduces downhole friction, and even in complex formations with large azimuth changes, the ability to adjust the drill bit tool face is improved to enable drilling to reach a farther target layer; during drilling, no excessive work is required to adjust the tool face, keeping the tool face stable and improving the mechanical drilling speed.

[0020] Working principle:

[0021] The power part of the ball-starting multi-head hydraulic oscillator is composed of a multi-head hollow motor. The lower end of the motor rotor is connected to a titanium alloy flexure shaft to drive the moving valve to rotate. Therefore, when the fluid passes through the hollow rotor, the motor does not work. When the soluble composite fracturing ball is thrown into the rotor, the hollow flow channel of the rotor is closed, and the hollow multi-head rotor rotates. Due to the characteristics of the motor, the end reciprocates on a plane, which is called a moving valve. The moving valve is closely matched with the lower fixed valve. Due to the rotation of the rotor, the two valve plates are staggered and overlapped, which causes the upstream pressure to change. The periodic relative motion causes the cross-sectional area (maximum and minimum values) of the fluid flowing through the tool to change periodically, generating pressure pulses to cause the pipe string to vibrate, reduce the friction resistance between the pipe string and the well wall, and improve the drilling pressure transmission and tool face control.

[0022] It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the utility model, and these improvements and modifications should also be regarded as the protection scope of the utility model.

Claims

1. A ball-starting multi-head hydraulic vibrator, characterized in that: It includes a lower flexible joint, a control valve housing, an adjustment sleeve, a fixed valve, a wear-resistant alloy sleeve, a movable valve, a movable valve seat, a lower flexible shaft joint, a universal shaft housing, a flexible shaft, a pin, an upper flexible shaft joint, a multi-head stator, a hollow multi-head rotor, a soluble composite fracturing ball and an upper flexible joint; the adjustment sleeve is installed in the control valve housing, the fixed valve is installed on one side of the adjustment sleeve, the wear-resistant alloy sleeve is installed in the control valve housing and slidably cooperates with the movable valve seat, the movable valve is connected to the movable valve seat, the movable valve cooperates with the static valve, the movable valve seat is connected to one end of the lower flexible shaft joint, and the lower flexible shaft joint One end is connected to one end of the flexible shaft through the pin, the other end of the flexible shaft is connected to the upper flexible shaft joint through the pin, the upper flexible shaft joint is connected to the hollow multi-head rotor, the hollow multi-head rotor is located in the multi-head stator and rollingly cooperates with it, the lower end of the hollow multi-head rotor is provided with a ball basket, the soluble composite fracturing ball cooperates with the hollow multi-head rotor, one end of the multi-head stator is connected to the upper flexible joint, and the other end is connected to one end of the universal shaft housing, the other end of the universal shaft housing is connected to one end of the control valve housing, and the other end of the control valve housing is connected to the lower flexible joint.

2. The ball-starting multi-head hydraulic vibrator according to claim 1 is characterized in that: An adjusting ring is also installed in the control valve housing. The adjusting ring is connected to one end of the wear-resistant alloy sleeve and is clamped at the step of the control valve housing.

3. The ball-starting multi-head hydraulic vibrator according to claim 1 is characterized in that: Strip holes are arranged around the ball basket.

4. The ball-starting multi-head hydraulic vibrator according to claim 1 is characterized in that: An arc-shaped shoulder is arranged in the middle of the hollow multi-head rotor.

5. The ball-starting multi-head hydraulic vibrator according to claim 1 is characterized in that: The soluble composite fracturing ball is made of soluble material.

6. The ball-starting multi-head hydraulic vibrator according to claim 1 is characterized in that: The movable valve, the fixed valve and the fixed valve seat are respectively provided with through holes.

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