Double-frequency hollow uniform-stress equal-wall-thickness hydraulic oscillator

Abstract

The invention belongs to the technical field of petroleum drilling equipment, and particularly relates to a double-frequency hollow uniform-stress equal-wall-thickness hydraulic oscillator. Comprising an upper connector, a static valve cylinder, a spring, an anti-rotating cylinder, an upper static valve, an upper movable valve, an upper movable valve seat, an anti-falling gasket, an anti-falling shell, an anti-falling connecting rod, a position adjusting screwed plug, a multi-head stator, a multi-head hollow rotor, a hollow alloy nozzle, an elastic check ring for a hole, a fan-shaped movable valve, a fan-shaped static valve and a static valve seat connector. A multi-head uniform-stress equal-wall-thickness motor structure is adopted to replace a single-head conventional motor, the motor stress distribution is uniform, the deformation resistance is good, the sealing performance is good, the solvent efficiency is high, the motor rubber swelling and thermal expansion are uniform, the heat dissipation effect is better, and the work is more stable.

Description

Technical Field

[0001] The invention belongs to the technical field of oil drilling equipment, and in particular relates to a dual-frequency hollow uniform stress equal wall thickness hydraulic oscillator. Background Art

[0002] The coiled tubing operation machine has the characteristics of establishing independent circulation channels and operating under pressure, so that the coiled tubing can provide various services in the transformation of shale gas reservoirs, such as clearing and washing wells, transmitting perforation, transmitting bridge plugs, sand flushing and unblocking, drilling and grinding bridge plugs, and clearing wellbore obstacles. However, the coiled tubing has also encountered some difficulties in the development of shale gas wells, especially because it often locks in directional wells and horizontal wells, making it difficult to reach the specified depth. Summary of the invention

[0003] The object of the present invention is to provide a dual-frequency hollow uniform stress equal wall thickness hydraulic oscillator to solve the problems existing in the prior art.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a dual-frequency hollow uniform stress equal wall thickness hydraulic oscillator, comprising an upper joint, a static valve cylinder, a spring, an anti-rotation cylinder, an upper static valve, an upper movable valve, an upper movable valve seat, an anti-drop gasket, an anti-drop shell, an anti-drop connecting rod, a position adjustment plug, a multi-head stator, a multi-head hollow rotor, a hollow alloy nozzle, a hole elastic retaining ring, a fan-shaped movable valve, a fan-shaped static valve and a static valve seat joint, wherein the fan-shaped static valve disc is installed in the static valve seat joint, the hollow alloy nozzle is installed in the multi-head hollow rotor, and the hole elastic retaining ring is installed in the multi-head hollow rotor. The upper movable valve is installed in the upper movable valve seat, the upper movable valve seat is connected to the anti-drop connecting rod, the upper static valve is installed in the static valve cylinder, the spring is installed in the static valve cylinder, the anti-rotation cylinder is installed on the static valve cylinder and connected to the upper joint, and the static valve seat joint is connected to the multi-head stator.

[0005] Preferably, a first "O"-shaped sealing ring is installed in the anti-rotation cylinder.

[0006] Preferably, a second "O"-shaped sealing ring is installed on the anti-drop shell.

[0007] Preferably, a third "O"-type sealing ring is installed in the inner hole of the multi-head hollow rotor.

[0008] Preferably, a fourth "O"-ring is provided on the static valve seat joint.

[0009] The beneficial effects of the present invention are as follows: 1. A multi-head uniform stress equal wall thickness motor structure is adopted to replace a single-head conventional motor, the motor stress distribution is uniform, the deformation resistance is good, the sealing is good, the solvent efficiency is high, the motor rubber swells and the thermal expansion is uniform, the heat dissipation effect is better, and the operation is more stable;

[0010] 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.

[0011] 3. The rotor adopts double valve disc assembly at the top and bottom, and the dual-frequency pressure pulse force is 50-66% stronger than that of a single head. The extended length of the working well section is increased, pushing the coiled tubing to the required depth.

[0012] 4. The anti-drop and anti-fall structure makes it safer to use underground. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a front view of the present invention; Figure 2 is a cross-sectional view of the movable sleeve of the lower TC bearing in the present invention; In the figure: 1. transmission shaft, 2. lower TC bearing moving sleeve, 3. lower TC bearing static sleeve, 4. anti-drop ball, 5. half ring, 6. pressure sleeve, 7. spacer sleeve, 8. transmission shaft housing, 9. thrust bearing group, 10 upper TC bearing static sleeve, 11. upper TC bearing moving sleeve. DETAILED DESCRIPTION

[0017] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0018] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0019] In the description of the invention, it should be noted that, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fixed connection" and "fixed connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the invention can be understood according to specific circumstances.

[0020] The specific implementation of the present invention is described in detail below with reference to the accompanying drawings and preferred embodiments.

[0021] like Figure 1 As shown, the upper joint 1, the static valve cylinder 2, the spring 3, the anti-rotation cylinder 4, the first "O"-shaped sealing ring 5, the upper static valve 6, the upper moving valve 7, the upper moving valve seat 8, the anti-drop gasket 9, the anti-drop housing 10, the anti-drop connecting rod 11, the second "O"-shaped sealing ring 12, the adjustment screw plug 13, the multi-head stator 14, the multi-head hollow rotor 15, the hollow alloy nozzle 16, the hole elastic retaining ring 17, the fan-shaped moving valve 18, the fan-shaped static valve 19, the static valve seat joint 20, the third "O"-shaped sealing ring 21 and the fourth "O"-shaped sealing ring 22; the fourth "O"-shaped sealing ring 22 is installed on the static valve seat joint 20; the fan-shaped static valve disc 19 is installed on the static valve seat joint 20; the third "O"-shaped sealing ring 21 is installed in the inner hole of the multi-head hollow rotor 15; the hollow alloy nozzle 16 is installed in the multi-head hollow rotor 15; The elastic retaining ring 17 for the hole is installed in the multi-head hollow rotor 15; the adjusting screw plug 13 is connected to the multi-head hollow rotor 15; the fan-shaped movable valve 18 is installed in the multi-head hollow rotor 15; the anti-drop connecting rod 11 is connected to the multi-head hollow rotor 15, and the multi-head hollow rotor 15 is installed in the multi-head stator 14; the second "O"-type sealing ring 12 is installed on the anti-drop shell 10, and the anti-drop shell 10 is connected to the multi-head stator 14, the anti-drop gasket 9 is installed on the anti-drop connecting rod 11, the upper movable valve 7 is installed in the upper movable valve seat 8, and the upper movable valve seat 8 is connected to the anti-drop connecting rod 11, and the upper static valve 6 is installed in the static valve cylinder 2; the spring 3 is installed in the static valve cylinder 2, the first "O"-type sealing ring 5 is installed in the anti-rotation cylinder 4, the anti-rotation cylinder 4 is installed on the static valve cylinder 2 and connected to the upper joint 1, and the static valve seat joint 20 is connected to the multi-head stator 14.

[0022] When the high-pressure drilling fluid of the mud pump flows through the torque pulse joint and enters the motor assembly, it pushes the rotor to rotate around the axis of the stator, and the speed and torque are increased. When a rotor rotates, the holes of the upper and lower valve disc assemblies are constantly staggered or overlapped, causing the flow area of ​​the drilling fluid flowing through the screw drill to change periodically, and then generating a dual-frequency pressure pulse at the motor inlet, so that the pulse pressure of the motor is increased. The increase in the output pulse pressure is determined by the flow area of ​​the upper and lower valve discs.

[0023] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a dual-frequency hollow uniform stress equal wall thickness hydraulic oscillator. Through the optimization of fluid and mechanical structure, the tool has the following functions when working: anti-drop, dual-frequency hydraulic pressure pulse, frequency modulation, pressure regulation, and displacement adjustment. The dual-frequency polymerization pulse force is increased by 50%-66%, so that the dual-frequency hollow uniform stress equal wall thickness hydraulic oscillator 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.

[0024] This structure has the following advantages:

[0025] 1. It plays a significant role in reducing the friction between the downhole pipe and the well wall during drilling;

[0026] 2. Reduce the risk of sinusoidal or spiral buckling of coiled tubing and reduce the pulling force when pulling out of the drill hole;

[0027] 3. Dual-frequency pulses can be aggregated to generate stronger pressure pulses, which can deepen the running depth of the coiled tubing and solve the locking phenomenon of the coiled tubing in wells with long horizontal sections or complex wellbore trajectories;

[0028] 4. Reduce friction and torque, improve coiled tubing milling efficiency; reduce pump jamming during coiled tubing drilling and milling and extend the service life of coiled tubing drilling and milling tool strings.

[0029] It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention, and these improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A dual-frequency hollow uniform stress equal wall thickness hydraulic oscillator, characterized in that: It includes an upper joint, a static valve cylinder, a spring, an anti-rotation cylinder, an upper static valve, an upper movable valve, an upper movable valve seat, an anti-drop gasket, an anti-drop shell, an anti-drop connecting rod, a position adjustment plug, a multi-head stator, a multi-head hollow rotor, a hollow alloy nozzle, a hole elastic retaining ring, a fan-shaped movable valve, a fan-shaped static valve and a static valve seat joint. The fan-shaped static valve disc is installed in the static valve seat joint, the hollow alloy nozzle is installed in the multi-head hollow rotor, the hole elastic retaining ring is installed in the multi-head hollow rotor, and the position adjustment plug is connected to the multi-head hollow rotor. The fan-shaped movable valve is installed in the multi-head hollow rotor, the anti-drop connecting rod is connected to the multi-head hollow rotor, the multi-head hollow rotor is installed in the multi-head stator, the anti-drop shell is connected to the multi-head stator, the anti-drop gasket is installed on the anti-drop connecting rod, the upper movable valve is installed in the upper movable valve seat, the upper movable valve seat is connected to the anti-drop connecting rod, the upper static valve is installed in the static valve cylinder, the spring is installed in the static valve cylinder, the anti-rotation cylinder is installed on the static valve cylinder and connected to the upper joint, and the static valve seat joint is connected to the multi-head stator.

2. The dual-frequency hollow uniform stress equal wall thickness hydraulic oscillator according to claim 1 is characterized in that: The anti-rotation cylinder is provided with a first "O" type sealing ring.

3. The dual-frequency hollow uniform stress equal wall thickness hydraulic oscillator according to claim 1 is characterized in that: A second "O" type sealing ring is installed on the anti-drop shell.

4. The dual-frequency hollow uniform stress equal wall thickness hydraulic oscillator according to claim 1 is characterized in that: A third "O" type sealing ring is installed in the inner hole of the multi-head hollow rotor.

5. The dual-frequency hollow uniform stress equal wall thickness hydraulic oscillator according to claim 1 is characterized in that: A fourth "O" type sealing ring is arranged on the static valve seat joint.

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