Hollow multi-head equal-wall-thickness motor hydraulic oscillator

Abstract

The utility model belongs to the technical field of hydraulic oscillators, and particularly relates to a hollow multi-head equal-wall-thickness motor hydraulic oscillator which comprises an integrated filter screen connector, a multi-head stator, a multi-head hollow rotor, a hollow alloy nozzle, a fan-shaped movable valve, a fan-shaped static valve and a static valve seat connector. The integrated filter screen connector is installed at one end of the shell, the multi-head stator is installed in the shell, the multi-head hollow rotor is located in the multi-head stator and matched with the multi-head stator, and the hollow alloy nozzle is installed at the other end of the multi-head hollow rotor and communicated with the multi-head hollow rotor. The fan-shaped movable valve is located on one side of the hollow alloy nozzle and installed on the multi-head hollow rotor, the fan-shaped static valve is installed on the static valve seat connector, and the static valve seat connector is fixed to the other end of the shell. According to the device, the multi-head equal-wall-thickness motor is adopted to replace a single-head conventional motor, motor rubber swelling and thermal expansion are uniform, the heat dissipation effect is better, and work is more stable.

Description

Technical Field

[0001] The utility model belongs to the technical field of hydraulic oscillators, and in particular relates to a hollow multi-head equal-wall-thickness motor hydraulic oscillator. Background Art

[0002] The hydraulic oscillator 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-reach wells and the continuous extension of horizontal displacement, its drilling mode faces greater challenges. Traditional hydraulic oscillators have also encountered some difficulties in the development of shale gas wells, especially because they often lock in directional wells and horizontal wells, making it difficult to reach the specified depth. Utility Model Content

[0003] The utility model aims to provide a hollow multi-head equal-wall thickness motor 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 hollow multi-head equal-wall thickness motor hydraulic oscillator, comprising an integrated filter joint, a multi-head stator, a multi-head hollow rotor, a hollow alloy nozzle, a fan-shaped movable valve, a fan-shaped static valve and a static valve seat joint; the integrated filter joint is installed at one end of the shell, the multi-head stator is installed in the shell, the multi-head hollow rotor is located in the multi-head stator and cooperates with it, the hollow alloy nozzle is installed at the other end of the multi-head hollow rotor and is connected with it, the fan-shaped movable valve is located on one side of the hollow alloy nozzle and is installed on the multi-head hollow rotor, the fan-shaped static valve is installed on the static valve seat joint, and the static valve seat joint is fixed to the other end of the shell.

[0005] Preferably, the front end of the integrated filter connector is provided with a protrusion, and a plurality of through holes are provided around the protrusion.

[0006] Preferably, the left end of the multi-head hollow rotor is threadedly connected with a position-adjusting plug, and the position-adjusting plug is in contact with the protrusion. The position of the multi-head hollow rotor can be adjusted by the position-adjusting plug, so that the position between the fan-shaped moving valve and the fan-shaped static valve can be adjusted.

[0007] Preferably, a space is left between the fan-shaped movable valve and the hollow alloy nozzle.

[0008] Preferably, the hollow alloy nozzle is fixed to the multi-head hollow rotor by a circlip through a hole.

[0009] Preferably, the water outlet holes of the fan-shaped movable valve and the fan-shaped static valve are both fan-shaped.

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

[0011] 1. Use multi-head equal-wall thickness motors instead of single-head conventional motors. The motor rubber swells and heats up evenly, the heat dissipation effect is better, and the operation is more stable;

[0012] 2. The hollow rotor and built-in nozzle structure are used to adapt to a wider range of displacement. Moreover, under fixed displacement operation, the nozzle size can be adjusted and diverted according to the required frequency;

[0013] 3. The pressure pulse force generated is 30% stronger than that of a single head, which increases the extension length of the working well section and pushes the coiled tubing to the required depth;

[0014] 4. The filter screen and joint are integrated, the multi-head rotor and the moving valve seat are integrated, and the assembly and maintenance are convenient. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0016] Figure 2 It is a structural schematic diagram of the lower half 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 hollow multi-head equal-wall thickness motor hydraulic oscillator includes an integrated filter screen connector 1, a first "O"-shaped sealing ring 2, a position adjustment plug 3, a multi-head stator 4, a multi-head hollow rotor 5, a hollow alloy nozzle 6, a hole elastic retaining ring 7, a fan-shaped movable valve 8, a fan-shaped static valve 9, a static valve seat connector 10, a second "O"-shaped sealing ring 11 and a third "O"-shaped sealing ring 12; the third "O"-shaped sealing ring 12 is installed in the static valve seat connector 10; the fan-shaped static valve 9 is installed in the static valve seat connector 10 ; The second "O"-shaped sealing ring 11 is installed in the inner hole of the multi-head hollow rotor 5; the hollow alloy nozzle 6 is installed in the multi-head hollow rotor 5; the hole elastic retaining ring 7 is installed in the multi-head hollow rotor 5; the adjustment screw plug 3 is connected to the multi-head hollow rotor 5; the fan-shaped movable valve 8 is installed in the hollow rotor 5; the multi-head hollow rotor 5 is installed in the multi-head stator 4; the static valve seat joint 10 is connected to the multi-head stator 4; the first "O"-shaped sealing ring 2 is installed on the integrated filter joint 1; the integrated filter joint 1 is connected to the multi-head stator 4. When the high-pressure drilling fluid of the mud pump flows through the torque pulse joint and enters the motor assembly, it drives the rotor to rotate around the axis of the stator, and transmits the speed and torque through the universal shaft assembly to the transmission shaft assembly and then to the drill bit to break the rock and drill. When the moving valve assembly on the integrated flow-guiding anti-drop rod rotates with the rotor, the static valve assembly and the moving valve assembly holes are constantly staggered or overlapped, causing the flow area of ​​the drilling fluid flowing through the screw drill to change periodically, thereby generating pressure pulses at the motor inlet, thereby increasing the output torque of the screw drill. The increase in output torque is determined by the flow area of ​​the moving valve assembly and the static valve disc assembly.

[0019] This device uses the pumped liquid as the power source to drive the oscillator to move axially and drive the downhole pipe to vibrate back and forth along the axial direction. It drives the multi-head rotor and the moving valve to rotate by pumping liquid, generating periodic pressure pulse vibration loads, converting the static friction between the pipe and the well wall into dynamic friction, thereby reducing the friction resistance and torque of the downhole pipe in the process of advancing, thereby effectively transmitting drilling pressure and increasing the depth of the continuous oil pipe.

[0020] Through the optimization of fluid and mechanical structure, the tool has the functions of hydraulic pressure pulse, frequency modulation, pressure regulation, and displacement adjustment when working, and the pressure pulse is increased by 20% to 30%, so that the hydraulic oscillator of hollow multi-head and other wall thickness motors has a wide range of adaptability and better performance. It can be used in the lowering operation of logging tools, perforating guns, millable composite bridge plugs and other tools, and can also be used to solve the problem of tubing sleeves getting stuck at the end of curved completion strings. Similarly, it can be used for lowering tail pipes and recovering stuck tail pipes / casings.

[0021] 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 hollow multi-head equal wall thickness motor hydraulic vibrator, characterized in that: It includes an integrated filter joint, a multi-head stator, a multi-head hollow rotor, a hollow alloy nozzle, a fan-shaped movable valve, a fan-shaped static valve and a static valve seat joint; the integrated filter joint is installed at one end of the shell, the multi-head stator is installed in the shell, the multi-head hollow rotor is located in the multi-head stator and cooperates with it, the hollow alloy nozzle is installed at the other end of the multi-head hollow rotor and is connected with it, the fan-shaped movable valve is located on one side of the hollow alloy nozzle and installed on the multi-head hollow rotor, the fan-shaped static valve is installed on the static valve seat joint, and the static valve seat joint is fixed to the other end of the shell.

2. The hollow multi-head equal wall thickness motor hydraulic vibrator according to claim 1, characterized in that: The front end of the integrated filter screen connector is provided with a protrusion, and a plurality of through holes are provided around the protrusion.

3. The hollow multi-head equal wall thickness motor hydraulic vibrator according to claim 2, characterized in that: The left end of the multi-head hollow rotor is threadedly connected with a position adjusting screw plug, and the position adjusting screw plug is in contact with and cooperates with the protrusion.

4. The hollow multi-head equal wall thickness motor hydraulic vibrator according to claim 1, characterized in that: A space is left between the fan-shaped movable valve and the hollow alloy nozzle.

5. The hollow multi-head equal wall thickness motor hydraulic vibrator according to claim 1, characterized in that: The hollow alloy nozzle is fixed on the multi-head hollow rotor by an elastic retaining ring through a hole.

6. The hollow multi-head equal-wall thickness motor hydraulic vibrator according to claim 1, characterized in that: The water outlet holes of the fan-shaped moving valve and the fan-shaped static valve are both fan-shaped.

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