CN113294104B - Hydrate pulse jet oscillation tool - Google Patents

Abstract

The invention discloses a hydrate pulse jet oscillation tool, which comprises an energy storage joint, a pulse oscillation generator and an ejector, wherein the pulse oscillation generator is communicated with the energy storage joint; the energy storage joint comprises a first outer barrel, a first inner pipe fixedly arranged in the first outer barrel, an energy storage spring sleeved outside the first inner pipe, and a sealing piston slidably sleeved outside the first inner pipe and positioned at the second end of the energy storage spring, wherein the sealing piston is hermetically arranged in a first annular space between the first inner pipe and the first outer barrel; the pulse oscillation generator comprises a second outer cylinder and a second inner pipe, and a spiral rotor which is rotatably arranged in the second inner pipe is arranged in the second inner pipe.

Description

A Hydrate Pulse Jet Oscillation Tool

technical field

The invention relates to the field of hydrate exploitation, more particularly, to a hydrate pulse jet oscillation tool.

Background technique

Hydrates are mainly present in the seabed and terrestrial permafrost, with high mud content and fine particles. During the mining process, the natural gas and water generated with the decomposition of hydrates can easily cause gas and water in the process of reservoir transportation. The fine particles in the formation migrate, causing blockage near the wellbore and water flooding in the wellbore. By using the pulsed jet oscillation blockage removal technology, the pulsating impinging jet is used to generate a strong periodic pressure alternating effect on the reservoir near the wellbore, promoting The ultra-fine particles in the pore wall of the reservoir are loosened, peeled off and separated, thereby dredging the pores, solving the blockage of ultra-fine particles in the hydrate reservoir, removing the blockage near the wellbore, enhancing the reservoir permeability, and increasing the production of a single well.

However, most of the existing pulse jet oscillation tools are controlled by electronic components, and their operation is easily affected by the external environment, and the performance stability is poor.

SUMMARY OF THE INVENTION

Aiming at the above-mentioned defects of the prior art, the present invention provides a hydrate pulse jet oscillation tool.

The technical solution adopted by the present invention to solve the technical problem is: constructing a hydrate pulse jet oscillation tool, the pulse jet oscillation tool comprising an energy storage joint, a pulse oscillation generator communicated with the energy storage joint, and a pulse vibration generator connected to the energy storage joint. an injector in communication with the generator;

The energy storage joint includes a first outer tube, a first inner tube fixed in the first outer tube, an energy storage spring sleeved outside the first inner tube, and slidably sleeved outside the first inner tube and a sealing piston at the second end of the energy storage spring, the sealing piston is sealingly arranged in the first annular space between the first inner tube and the first outer cylinder, the first end of the first inner tube and the first outer cylinder are sealed The first end is fixedly connected, the second end of the first inner tube is provided with a positioning joint that stops the sealing piston, and the first end stop;

The pulse oscillation generator includes a second outer cylinder and a second inner tube, the second inner tube is provided with a helical rotor rotatably arranged in the second inner tube, and the second end of the second outer tube is rotatably arranged in the second inner tube. The upper disc valve in the second outer cylinder and the lower disc fixed valve fixed in the second outer cylinder and sealingly matched with the upper disc valve, the second end of the helical rotor is connected with the upper disc valve and drives the upper disc valve to rotate, the upper disc valve is provided with at least one first through hole, and the lower disc fixed valve is provided with at least one first through hole at the position corresponding to the first through hole. at least one second through hole through;

The injector is provided with at least one nozzle.

In the hydrate pulse jet oscillating tool of the present invention, the first inner tube is further provided with a spring seat movably sleeved outside the first inner tube, and the spring seat is located between the energy storage spring and the sealing piston between.

In the hydrate pulse jet oscillation tool of the present invention, the first end of the first outer cylinder and the first end of the first inner tube are integrally formed to form an upper joint.

In the hydrate pulse jet oscillating tool of the present invention, a breathing hole communicated with the first annular space is provided on the side wall of the first outer cylinder near the stopper, and the breathing hole penetrates through the first outer cylinder. barrel side wall.

In the hydrate pulse jet oscillation tool of the present invention, the second end of the energy storage joint is connected and communicated with the first end of the pulse oscillation generator through a shunt joint.

In the hydrate pulse jet oscillating tool of the present invention, the shunt joint includes a main joint connected and communicated with the second end of the first outer cylinder, a main water pipe communicated with the main joint, and a main joint communicated with the main joint. A shunt pipe, the first end of the main water pipe is in communication with the main joint, the second end of the main water pipe is connected and communicated with the first end of the second inner pipe, the first end of the shunt pipe is in communication with the main joint, and the first end of the shunt pipe is in communication with the main joint. The two ends communicate with the second annular space between the second outer cylinder and the second inner tube.

In the hydrate pulse jet oscillating tool of the present invention, there are three shunt pipes, and the three shunt pipes are arranged on the periphery of the main water pipe at equal intervals.

In the hydrate pulse jet oscillating tool of the present invention, the bottom end of the helical rotor is connected with the upper disc valve through a connecting bearing.

In the hydrate pulse jet oscillating tool of the present invention, at least one guide hole is provided on the side wall of the second inner tube, and the guide hole communicates with the second inner tube and the second annular space.

In the hydrate pulse jet oscillation tool of the present invention, the first end of the injector is connected and communicated with the second end of the second outer cylinder through a lower joint, and the injector is provided with six nozzles, and the six nozzles Equal intervals are evenly distributed on the outer side wall of the nozzle.

Implementing the hydrate pulse jet oscillating tool of the present invention has the following beneficial effects: when the hydrate pulse jet oscillating tool of the present invention is implemented, the water flow enters the energy storage joint from the first end of the first inner tube, and flows through the second inner tube When the water flow passes through the second inner tube, it drives the screw rotor to rotate in the second inner tube, and the screw rotor drives the upper disc valve connected to it to rotate during the rotation process. When it is on, the water flows into the energy storage joint and the pulse oscillation generator and cannot enter the ejector and spray out, resulting in a gradual increase in the water pressure in the energy storage joint, and the sealing piston is subjected to the pressure of the water to the direction of the first end of the first inner pipe. When moving, the energy storage spring is compressed to form energy storage. When the upper disc valve is rotated until the first through hole and the second through hole are connected, the water located in the energy storage joint and the pulse oscillation generator can enter the ejector from the first through hole and the second through hole, and pass through the ejector. The nozzle is sprayed out, and the water pressure in the energy storage joint is reduced at this time, the energy storage spring rebounds under the action of its own elastic restoring force, and the spring pushes the sealing piston to move towards the second end of the first inner tube to pressurize The function of extruding water flow realizes energy storage and energy release, enhances the pressure of jet fluid ejection, and achieves better perforating effect. The pulse jet oscillating tool used in the present invention produces a periodic shut-off action through its internal upper disc dynamic valve and lower disc fixed valve to form a local high pressure, which is then quickly released to form a certain pressure pulse oscillation, combined with the energy storage inside the tool The spring pressurizing mechanism increases the oscillating force of the pulse jet and enhances the blocking effect. The invention has simple structure, stable and reliable performance, no complicated electronic components, and is less affected by the external environment.

Description of drawings

The present invention will be further described below in conjunction with the accompanying drawings and embodiments, in which:

Fig. 1 is the structural schematic diagram of the hydrate pulse jet oscillating tool of the present invention;

Fig. 2 is a schematic structural diagram of the upper disk moving valve and the lower disk fixed valve in the hydrate pulse jet oscillating tool of the present invention.

Detailed ways

In order to make the objectives, technical solutions and advantages of the present invention clearer, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

As shown in Figures 1 and 2, in the first embodiment of the hydrate pulse jet oscillation tool of the present invention, the pulse jet oscillation tool 10 includes an energy storage joint 11, a pulse oscillation generator 12 communicated with the energy storage joint 11, and an injector 13 in communication with the pulse generator 12 .

The energy storage joint 11 includes a first outer cylinder 14 , a first inner tube 15 fixed in the first outer cylinder 14 , an energy storage spring 16 sleeved outside the first inner tube 15 , and a slidable sleeve The sealing piston 17 located outside the first inner tube 15 and located at the second end of the energy storage spring 16, the sealing piston 17 seals the first annular space 18 disposed between the first inner tube 15 and the first outer cylinder 14, the The first end of the first inner tube 15 is fixedly connected with the first end of the first outer cylinder 14 , the second end of the first inner tube 15 is provided with a positioning joint 19 for blocking the sealing piston 17 , and the middle of the first inner tube 15 is A blocking portion 20 for blocking the first end of the energy storage spring 16 is fixed between it and the middle portion of the first outer cylinder 14 .

When the sealing piston 17 is subjected to water pressure, it can move in the direction of the first end of the first inner tube 15. At this time, the energy storage spring 16 is compressed to form energy storage. At the moment when the water is released, the energy storage spring 16 rebounds under the action of its own elastic restoring force, and the spring pushes the sealing piston 17 to move toward the second end of the first inner tube 15 to pressurize and squeeze out the water flow, thereby To achieve energy storage and energy release, increase the pressure of the jet fluid, and play a better perforation effect, which will be described in detail later.

The pulse oscillation generator 12 includes a second outer tube 21 and a second inner tube 22. The second inner tube 22 is provided with a helical rotor 23 rotatably disposed in the second inner tube 22. The second outer tube 21 The second end is provided with an upper disc valve 24 rotatably disposed in the second outer cylinder 21 , and a lower disc fixed valve 25 fixed in the second outer cylinder 21 and sealingly matched with the upper disc valve 24 . , the second end of the screw rotor 23 is connected with the upper disc valve 24 and drives the upper disc valve 24 to rotate. The upper disc valve 24 is provided with at least one first through hole 26, and the lower disc fixed valve 25 At least one second through hole 27 that can communicate with the first through hole 26 is provided at a position corresponding to the first through hole 26 .

When the water flow enters the second inner tube 22 from the first end of the second inner tube 22, the water flow impacts the screw rotor 23, and the screw rotor 23 is driven to rotate continuously in the second inner tube 22 by the water flow, thereby driving the upper disc valve 24. The purpose of continuous rotation.

Preferably, there are two first through holes 26 , two through holes are symmetrically arranged on both sides of the upper disc valve 24 , and one second through hole 27 is located corresponding to the first through hole 26 .

The injector 13 is provided with at least one nozzle 28 .

When implementing the hydrate pulse jet oscillating tool 10 of the present invention, the water flow enters the energy storage joint 11 from the first end of the first inner tube 15 and flows through the second inner tube 22 , and the water flow drives the screw when passing through the second inner tube 22 . The rotor 23 rotates in the second inner tube 22, and the screw rotor 23 drives the upper disc valve 24 connected to it to rotate during the rotation. When the first through hole 26 and the second through hole 27 are not connected, the water After flowing into the energy storage joint 11 and the pulse oscillator 12, it cannot enter the ejector 13 and spray out, resulting in the gradual increase of the water pressure in the energy storage joint 11, and the sealing piston 17 is subjected to the pressure of the water to the first inner pipe 15. When the end direction moves, the energy storage spring 16 is compressed to form energy storage. When the upper disc valve 24 is rotated until the first through hole 26 and the second through hole 27 are connected, the water in the energy storage joint 11 and the pulse oscillation generator 12 can enter from the first through hole 26 and the second through hole 27 The ejector 13 is sprayed out through the nozzle 28 of the ejector 13. At this time, the water pressure in the energy storage joint 11 decreases, the energy storage spring 16 rebounds under the action of its own elastic restoring force, and the spring pushes the sealing piston 17 to the first. The second end of an inner pipe 15 moves in the direction to pressurize and extrude the water flow, realize energy storage and energy release, enhance the pressure of jet fluid ejection, and achieve better perforation effect. The pulse jet oscillating tool 10 used in the present invention produces a periodic shut-off action through the upper disc dynamic valve 24 and the lower disc fixed valve 25 inside, forming a local high pressure, and then quickly releasing it to form a certain pressure pulse oscillation, which is combined with the inside of the tool. The energy storage spring 16 pressurization mechanism improves the oscillating force of the pulse jet and enhances the blocking effect. The invention has the advantages of simple structure, stable and reliable performance, no complicated electronic components, and less influence from the external environment.

In order to avoid damage to the sealing piston 17 caused by the spring, the first inner tube 15 is also provided with a spring seat 29 movably sleeved outside the first inner tube 15, and the spring seat 29 is located between the energy storage spring 16 and the seal. between the pistons 17. During the process of the spring being compressed or rebounding, the energy storage spring 16 pushes against the sealing piston 17 through the spring seat 29 , so as to avoid damage to the sealing piston 17 caused by the spring.

In this embodiment, the first end of the first outer cylinder 14 and the first end of the first inner tube 15 are integrally formed to form the upper joint 30 . In other embodiments, the first end of the first outer cylinder 14 and the first end of the first inner tube 15 may also be fixedly connected by other fixed connection methods such as bonding, welding, and screw connection.

Further, a breathing hole 38 communicated with the first annular space 18 is provided on the side wall of the first outer cylinder 14 near the blocking portion 20 , and the breathing hole 38 penetrates the side wall of the first outer cylinder 14 .

During the compression of the accumulating spring 16 , the sealing piston 17 moves in the first annular space 18 , and the air located in the first annular space 18 is squeezed out from the breathing hole 38 . During the extension process of the energy storage spring 16 , the sealing piston 17 moves in the first annular space 18 , and the outside air is sucked into the first annular space 18 from the breathing hole 38 . By arranging the breathing hole 38, the interference of the atmospheric pressure on the movement of the sealing piston 17 can be avoided.

In this embodiment, the second end of the energy storage joint 11 is connected and communicated with the first end of the pulse oscillator 12 through a shunt joint 39 . The branch joint 39 includes a main joint 31 connected to and communicated with the second end of the first outer cylinder 14 , a main water pipe 32 communicated with the main joint 31 , and a branch pipe 33 communicated with the main joint 31 . The main water pipe 32 The first end is communicated with the main joint 31, the second end of the main water pipe 32 is connected and communicated with the first end of the second inner pipe 22, the first end of the shunt pipe 33 is communicated with the main joint 31, and the shunt pipe 33 Both ends communicate with the second annular space 36 between the second outer cylinder 21 and the second inner tube 22 . Preferably, when the shunt joint 39 is connected to the pulse oscillation generator 12, the top end of the helical rotor 23 can be rotatably inserted into the second end of the main water pipe 32, and there is water supply between the top of the helical rotor 23 and the main water pipe 32. The water inlet portion of the second inner pipe 22 .

After the water flow enters the branch joint 39 from the energy storage joint 11, part of the water flows through the main water pipe 32 to the second inner pipe 22, which plays the role of driving the helical rotor 23, and another part of the water flows into the second annular space 36 through the branch pipe 33. The water flows finally flow to the position of the upper disc valve 24 at the second end of the pulse oscillation generator 12 through different channels respectively.

In this embodiment, preferably, the number of the branch pipes 33 is three, and the three branch pipes 33 are arranged on the periphery of the main water pipe 32 at equal intervals. In other embodiments, the shunt pipes 33 may also be one, two, four, or five, and the like.

Specifically, the bottom end of the helical rotor 23 is connected with the upper disc valve 24 through a connecting bearing 34 . The first end of the connecting bearing 34 is connected with the screw in rotation, and the second end of the connecting bearing 34 is connected with the upper disc valve 24 .

Further, at least one guide hole 35 is provided on the side wall of the second inner tube 22 , and the guide hole 35 communicates with the second inner tube 22 and the second annular space 36 . Preferably, there are two guide holes 35 , which are symmetrically arranged on both sides of the second inner tube 22 .

Further, the first end of the injector 13 is connected and communicated with the second end of the second outer cylinder 21 through the lower joint 37, and six nozzles 28 are provided on the injector 13, and the six nozzles 28 are evenly distributed at equal intervals. The nozzle 28 is on the outer side wall.

It can be understood that, in this embodiment, the connection between the joint, the outer cylinder or the inner pipe is all threaded. In other embodiments, the connection between the joint, the outer cylinder or the inner tube can also be fixedly connected by means of bonding, welding or the like.

In addition, in the present invention, unless otherwise expressly specified and limited, the terms "connected", "connected", "stacked" and other terms should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection, or It can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication between two elements or the interaction relationship between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

The above descriptions are only the embodiments of the present invention, and are not intended to limit the scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of the present invention, or directly or indirectly applied to other related technologies Fields are similarly included in the scope of patent protection of the present invention.

Claims (9)

1. A hydrate pulse jet oscillating tool, characterized in that the pulse jet oscillating tool (10) comprises an energy storage joint (11), a shunt joint (39), and a pulse connected to the energy storage joint (11) An oscillation generator (12) and an injector (13) communicated with the pulse oscillation generator (12), the lower end of the energy storage joint (11) and the first end of the pulse oscillation generator (12) pass through a shunt joint (39) Connect and communicate; The energy storage joint (11) includes a first outer cylinder (14), a first inner tube (15) fixed in the first outer cylinder (14), and a first inner tube (15) sleeved on the first inner tube (15). ) outside the energy storage spring (16), the sealing piston (17) slidably sleeved outside the first inner tube (15) and located at the second end of the energy storage spring (16), the sealing piston (17) ) seal the first annular space (18) between the first inner tube (15) and the first outer cylinder (14), the first end of the first inner tube (15) and the first outer tube (14) The first end of the cylinder (14) is fixedly connected, the second end of the first inner tube (15) is provided with a positioning joint (19) that stops the sealing piston (17), and the middle part of the first inner tube (15) A blocking portion (20) for blocking the first end of the energy storage spring (16) is fixed between the first outer cylinder (14) and the middle portion; The pulse oscillation generator (12) comprises a second outer cylinder (21) and a second inner tube (22), and the second inner tube (22) is provided with a rotatable arrangement in the second inner tube (22). ) inside the helical rotor (23), the first end of the second outer cylinder (21) is connected to the shunt joint (39), and the second end of the second outer cylinder (21) is rotatably arranged on the The upper disc valve (24) in the second outer cylinder (21), and the lower disc fixed valve (25) fixed in the second outer cylinder (21) and in sealing cooperation with the upper disc valve (24). ), the lower end of the helical rotor (23) is connected to the upper disc valve (24) and drives the upper disc valve (24) to rotate, and the upper disc valve (24) is provided with at least one first A through hole (26), at least one second through hole (26) can be communicated with the first through hole (26) at a position corresponding to the first through hole (26) on the lower plate fixing valve (25). through hole(27); The injector (13) is provided with at least one nozzle (28). 2. The hydrate pulse jet oscillation tool according to claim 1, characterized in that, a spring movably sleeved outside the first inner tube (15) is further provided outside the first inner tube (15). A seat (29), the spring seat (29) is located between the energy storage spring (16) and the sealing piston (17). The hydrate pulse jet oscillation tool according to claim 1, wherein the first end of the first outer cylinder (14) and the first end of the first inner tube (15) are integrally formed to form an upper joint (30). ). The hydrate pulse jet oscillating tool according to claim 1, characterized in that, on the side wall of the first outer cylinder (14), a position close to the stopper (20) is provided with the first outer cylinder (14). A breathing hole (38) communicated with the annular space (18), the breathing hole (38) penetrates the side wall of the first outer cylinder (14). 5. The hydrate pulse jet oscillating tool according to claim 1, wherein the shunt joint (39) comprises a main joint (31) that is connected and communicated with the second end of the first outer cylinder (14) , a main water pipe (32) communicated with the main joint (31), and a shunt pipe (33) communicated with the main joint (31), the first end of the main water pipe (32) is connected to the main joint ( 31) is connected, the second end of the main water pipe (32) is connected and communicated with the first end of the second inner pipe (22), and the first end of the shunt pipe (33) is communicated with the main joint (31) , the second end of the shunt pipe (33) communicates with the second annular space (36) between the second outer cylinder (21) and the second inner pipe (22). 6 . The hydrate pulse jet oscillation tool according to claim 5 , wherein the number of the shunt pipes ( 33 ) is three, and the three shunt pipes ( 33 ) are arranged on the periphery of the main water pipe ( 32 ) at equal intervals. 7 . 7 . The hydrate pulse jet oscillation tool according to claim 5 , wherein the bottom end of the helical rotor ( 23 ) is connected with the upper disc valve ( 24 ) through a connecting bearing ( 34 ). 8 . The hydrate pulse jet oscillation tool according to claim 5, characterized in that, at least one guide hole (35) is provided on the side wall of the second inner tube (22), and the guide hole (35) ) communicates with the second inner tube (22) and the second annular space (36). 9. The hydrate pulse jet oscillation tool according to claim 1, wherein the first end of the injector (13) is connected with the second end of the second outer cylinder (21) through a lower joint (37) The injector (13) is provided with six nozzles (28), and the six nozzles (28) are evenly distributed on the outer wall of the injector (13) at equal intervals.

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