A downhole vibration oil production power converter

Abstract

The invention discloses a downhole vibration oil production power converter, comprising an oil pipe coupling, wherein the upper end of the oil pipe coupling is connected to the oil pipe, and the lower end of the oil pipe coupling is sequentially equipped with a connecting short circuit, a driving cylinder sleeve short circuit, an outer sleeve, a connecting rod sealing assembly and a lower connecting short circuit from top to bottom, and the outer sleeve is embedded with the driving cylinder sleeve. The invention can convert the power generated by the ground pumping unit, the linear motor in the wellbore or the water power piston in the warp cylinder into the power required for downhole artificial vibration oil production, and the vibration intensity and vibration frequency can be adjusted, so as to realize the complete process of artificial downhole vibration oil production with power conversion between the ground and the well, achieve the purpose of one-point vibration and multiple wells receiving effects, and can generate a relatively strong vibration effect on the oil layer during operation, so as to effectively improve the effect of oil field development, and transfer the ground vibration source to the well, which not only overcomes the damage of vibration to surface equipment and personnel, but also avoids the waste of vibration energy.

Description

Technical Field

[0001] The invention relates to the technical field of a vibration oil production power converter for improving the oil field development effect through vibration waves during the oil development process, in particular to a downhole vibration oil production power converter. Background Art

[0002] At present, in the process of oil development, the positive impact of vibration effect on oil field development has been confirmed by many oil fields at home and abroad. Artificial vibration oil production technology can effectively improve the flow characteristics of formation fluids and increase crude oil recovery rates. On-site applications have seen obvious results. However, ground vibration sources, as the main equipment for vibration oil production, have certain limitations and technical deficiencies. First, the vibration generated by equipment operation has certain damage to ground equipment and facilities and nearby personnel. Second, most of the vibration energy is absorbed and consumed by the soft soil layer on the surface, and the vibration wave energy transmitted to the oil layer is relatively weak, so the effect is limited. In view of this, in-depth research was conducted on the above-mentioned issues, and this case was created. Summary of the invention

[0003] The purpose of the present invention is to solve the above problems. A downhole vibration oil production power converter is designed to solve the problems in the prior art of damage to surface equipment, facilities and personnel caused by vibration equipment and serious waste of vibration energy.

[0004] The technical solution of the present invention for achieving the above-mentioned purpose is: a downhole vibration oil production power converter, including an oil pipe coupling, the upper end of the oil pipe coupling is connected to the oil pipe, the lower end of the oil pipe coupling is equipped with a connecting short circuit, a push cylinder sleeve short circuit, an outer sleeve, a connecting rod sealing assembly and a lower connecting short circuit in sequence from top to bottom, the outer sleeve is embedded with a push cylinder sleeve, a pressure relief groove is provided on the inner wall of the push cylinder sleeve, the lower connecting short circuit is connected to the bottom hole accessory, a disconnector connector is provided in the oil pipe coupling, the upper end of the disconnector connector is connected to the disconnector, and the lower end is connected to the vibration cylinder sleeve, the lower end of the vibration cylinder sleeve is installed with a pushing piston assembly, a vibration piston is slidably arranged in the vibration cylinder sleeve, the lower end of the vibration piston is connected to the connecting rod, the lower end of the connecting rod is connected to a hammer head, and the connecting rod and the connecting rod sealing assembly are slidably sealed by a sealing ring.

[0005] The above-mentioned pushing piston assembly includes a pushing piston assembly connecting sleeve, which is assembled on the lower end of the vibration cylinder sleeve and connected to the sealing valve ball sleeve, and the sealing valve ball is mounted on the sealing valve ball sleeve. The lower end of the sealing valve ball is axially limited by the step on the sealing valve ball sleeve, and the upper end is axially compressed by the pushing piston assembly connecting sleeve to form an end face seal. A retaining ring is provided at the lower end of the sealing valve ball sleeve, and the retaining ring is assembled and connected with the sealing valve ball sleeve through a retaining ring fixing pin, and a liquid inlet channel is opened on the side wall of the retaining ring. A pushing piston matching the retaining ring is mounted on the outer side of the sealing valve ball sleeve, and the pushing piston is slidingly sealed with the inner wall of the pushing cylinder sleeve.

[0006] The inner through hole of the push piston is a stepped hole and is arranged from top to bottom in sequence as a small diameter section and a necked section. The diameter of the small diameter section is smaller than the diameter of the necked section. The end face of the small diameter section is chamfered at a certain angle and the chamfered surface is smooth to form a valve seat.

[0007] The outer side surface of the retaining ring is provided with a plurality of through grooves as liquid inlet channels along the axial direction. The outer diameter of the groove wall of the through groove is slightly smaller than the diameter of the reduced diameter section of the push piston. The groove wall of the retaining ring can drive the push piston to move synchronously along the axial direction.

[0008] The outer surface of the vibration piston is provided with a plurality of annular sand prevention grooves and the lower end of the vibration piston is a reduced diameter structure.

[0009] An inner shaft hole is provided at the lower end of the reduced diameter structure of the vibration piston, a semicircular groove is provided on the inner wall of the inner shaft hole, and a ball-casting hole with a vertical axis and the same diameter as the groove is drilled at a position opposite to the groove and connected to the inner shaft hole.

[0010] The upper end of the connecting rod is provided with a reducing step whose diameter is slightly smaller than the inner shaft hole at the lower end of the vibration piston. A semicircular ring groove is opened on the side wall of the reducing step and the diameter of the semicircular ring groove is the same as the diameter of the semicircular groove of the inner shaft hole of the vibration piston.

[0011] The necked step of the connecting rod is inserted into the inner shaft hole at the lower end of the vibrating piston so that the semicircular ring groove and the semicircular groove are opposite to each other to form a complete ring groove. A number of equal-diameter locking balls are loaded into the ring groove through the ball throwing hole to fill the ring groove. A pressure ball is then installed in the ball throwing hole. A locking sleeve is mounted on the outside of the necked step and fixed to the locking sleeve by a fixing nail.

[0012] The outer surface of the push piston is smooth and is provided with a plurality of shallow annular grooves along the circumferential direction.

[0013] The two ends of the push cylinder sleeve are short-circuited by the push cylinder sleeve and fixed by the outer sleeve, and sealing sections are arranged at both ends to seal with the outer sleeve through end sealing rings.

[0014] The downhole vibration oil production power converter made by utilizing the technical solution of the present invention can convert the power generated by the ground pumping unit, the linear motor in the wellbore or the water-powered piston in the warp barrel into the power required for downhole artificial vibration oil production, and the vibration intensity and vibration frequency can be adjusted, thereby realizing a complete process of artificial downhole vibration oil production with power conversion between the ground and the well, achieving the purpose of one-point vibration and multiple wells being effective. When working, it can produce a relatively strong vibration effect on the oil layer, thereby effectively improving the effect of oil field development, and transferring the ground vibration source to the wellbore, which not only overcomes the damage of vibration to surface equipment and personnel, but also avoids the waste of vibration energy. The process method adopted by the device is simple, easy to use, and conducive to promotion and application. It is suitable for various types of oil field development, especially suitable for development blocks with intensive well layout of heavy oil, various polluted oil layer blocks and slow-effective water blocks. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the main structure of the present invention.

[0016] Figure 2 For the present invention Figure 1 Schematic diagram of the local enlarged structure.

[0017] Figure 3 It is a schematic diagram of the cross-sectional structure at position AA of the present invention.

[0018] Figure 4 It is a schematic diagram of the enlarged structure of position a of the present invention.

[0019] In the figure: 1-oil pipe coupling; 2-disconnector connector; 3-connecting short circuit; 4-vibrating cylinder sleeve; 5-vibrating piston; 5-1-sand prevention groove; 5-2-locking sleeve; 5-3-pressure ball; 5-4-locking ball; 5-5-fixing nail; 6-pushing cylinder sleeve short circuit; 7-end sealing ring; 8-pushing cylinder sleeve, 8-1-pressure relief groove; 9-pushing piston assembly; 9-1-pushing piston assembly connecting sleeve; 9-2-sealing valve ball; 9-3-sealing valve ball pressure sleeve; 9-4-retaining ring; 9-5-retaining ring fixing nail; 9-6-liquid inlet channel; 9-7-pushing piston; 10-outer sleeve; 10-1-return channel; 11-connecting rod; 12-sealing ring; 13-connecting rod sealing assembly; 14-lower connecting short circuit; 15-hammer head. DETAILED DESCRIPTION

[0020] The present invention will be described in detail below in conjunction with the accompanying drawings. Figure 1-4 As shown, the components in this case are connected in sequence by those skilled in the art. The specific connection and operation sequence should refer to the following working principle. The detailed connection means are well-known technologies in the art. The following mainly introduces the working principle and process.

[0021] Embodiment: By the specification attached Figure 1-4 It can be seen that in this scheme, the upper end of the tubing coupling 1 is connected to the tubing, and the lower end of the tubing coupling 1 is equipped with a connecting short circuit 3, a push cylinder sleeve short circuit 6, an outer sleeve 10, a connecting rod sealing assembly 13 and a lower connecting short circuit 14 in sequence from top to bottom. The outer sleeve 10 is embedded with a push cylinder sleeve 8, and a pressure relief groove 8-1 is provided on the inner wall of the push cylinder sleeve 8. The lower connecting short circuit 14 is connected to the bottom hole accessories. A disconnector connector 2 is provided in the tubing coupling 1, and the upper end of the disconnector connector 2 is connected to the disconnector and the lower end is connected to the vibration cylinder sleeve 4. A pushing piston assembly 9 is installed at the lower end of the vibration cylinder sleeve 4, and a vibration piston 5 is slidably arranged in the vibration cylinder sleeve 4. The lower end of the vibration piston 5 is connected to the connecting rod 11, and the lower end of the connecting rod 11 is connected to a hammer head 15, and the connecting rod 11 and the connecting rod sealing assembly 13 are slidably sealed by a sealing ring 12. The above-mentioned pushing piston assembly 9 includes a pushing piston assembly connection Sleeve 9-1, the push piston assembly connecting sleeve 9-1 is assembled on the lower end of the vibration cylinder sleeve 4 and connected with the sealing valve ball pressing sleeve 9-3, the sealing valve ball pressing sleeve 9-3 is sleeved with a sealing valve ball 9-2, the lower end of the sealing valve ball 9-2 is axially limited by the step on the sealing valve ball pressing sleeve 9-3, and the upper end is axially pressed by the push piston assembly connecting sleeve 9-1 to form an end face seal, the lower end of the sealing valve ball pressing sleeve 9-3 is provided with a retaining ring 9-4, the retaining ring 9-4 is assembled and connected with the sealing valve ball pressing sleeve 9-3 through the retaining ring fixing nail 9-5, and a liquid inlet channel 9-6 is opened on the side wall of the retaining ring 9-4, the outer side of the sealing valve ball pressing sleeve 9-3 is sleeved with a push piston 9-7 matching the retaining ring 9-4, the push piston 9-7 is slidably sealed with the inner wall of the push cylinder sleeve 8, the two ends of the push cylinder sleeve 8 are fixed by the push cylinder sleeve short circuit 6 and the outer sleeve 10, and the two ends are provided with sealing sections that are sealed with the outer sleeve 10 through the end sealing rings 7;

[0022] When in use, the upper end of the converter is connected to the ground or wellbore power, and the lower end is connected to the bottom hole accessories, and then the device is connected to the bottom hole accessories and placed underground, and the disconnector connector 2, the vibrating cylinder sleeve 4, and the push piston assembly 9 are driven upward by the ground or wellbore power. At this time, the vibrating piston 5 and the connecting rod 11 are at the bottom dead center position under the action of the gravity of the hammer head 15. At this time, the liquid inlet valve formed by the sealing valve ball 9-2 and the push piston 9-7 is in an open state, and the liquid can make the upper and lower pressures of the vibrating piston 5 the same through the liquid inlet channel 9-6, further controlling the push piston assembly 9 to move upward, and driving the push piston 9-7 to leave the pressure relief groove 8-1 position of the push cylinder sleeve 8 and enter the top dead center of the sealing section of the push cylinder sleeve 8.

[0023] When the ground or wellbore power is controlled to drive the disconnector connector 2, the vibrating cylinder sleeve 4, and the push piston assembly 9 downward, the liquid inlet valve formed by the sealing valve ball 9-2 and the push piston 9-7 is in a closed state, and the pressure at the lower end of the push piston 9-7 gradually increases. Under the action of the hydraulic pressure, the vibrating piston 5, the connecting rod 11, and the hammer head 15 overcome the gravity of the three connecting parts and move upward;

[0024] When the pushing pistons 9-7 all enter the pressure relief groove 8-1 section of the pushing cylinder sleeve 8, the lower part of the vibration piston 5 suddenly releases pressure through the reflux channel 10-1, and the upper and lower pressures are the same. At this time, the vibration piston 5 and the connecting rod 11 move downward rapidly under the dual effects of the gravity of the hammer head 15 and the hydraulic driving force, realizing a movement equivalent to a free fall, so that the hammer head 15 and the bottom hole accessories achieve an impact vibration, realize the forced vibration of the oil layer, and produce a series of vibration effects to achieve increased production.

[0025] The upward running height of the vibrating piston 5 and the connecting piece and the downward running distance of the pushing piston assembly 9 are inversely proportional to the ratio of their force-bearing areas.

[0026] The up and down movements of the disconnector connector 2 and the connector can continuously drive the vibration piston 5 and the connector to move up and down. At the same time, the stroke of the disconnector connector 2 and the connector can be adjusted, thereby adjusting the falling height of the hammer and the impact force. At the same time, the impact frequency of the hammer can be adjusted by adjusting the running speed of the disconnector connector 2 and the connector.

[0027] In the specific implementation process, the outer surface of the above-mentioned pushing piston 9-7 is smooth and has a plurality of annular shallow grooves along the circumferential direction. The inner through hole of the pushing piston 9-7 is a stepped hole and is arranged as a small diameter section and a necking section from top to bottom. The diameter of the small diameter section is smaller than the diameter of the necking section. The end face of the small diameter section is chamfered at a certain angle and the chamfered surface is smooth to form a valve seat. The outer side surface of the retaining ring 9-4 is axially provided with a plurality of through grooves as liquid inlet channels 9-6. The outer diameter of the groove wall of the through groove is slightly smaller than the diameter of the necking section of the pushing piston 9-7. The groove wall of the retaining ring 9-4 can drive the pushing piston 9-7 to move synchronously along the axial direction.

[0028] In the specific implementation process, the outer surface of the above-mentioned vibration piston 5 is provided with a plurality of annular sand prevention grooves 5-1, and the lower end of the vibration piston 5 is a reduced diameter structure. The lower end of the reduced diameter structure of the vibration piston 5 is provided with an inner shaft hole, and a semicircular groove is provided on the inner wall of the inner shaft hole. A pitching hole with a vertical axis and the same diameter as the groove is drilled at a position opposite to the groove and connected to the inner shaft hole. The upper end of the connecting rod 11 is provided with a reduced diameter step and the diameter is slightly smaller than the inner shaft hole at the lower end of the vibration piston 5. A semicircular annular groove is provided on the side wall of the reduced diameter step, and the diameter of the semicircular annular groove is the same as the diameter of the semicircular groove of the inner shaft hole of the vibration piston 5. The necking step of the connecting rod 11 is inserted into the inner shaft hole at the lower end of the vibration piston 5 so that the semicircular annular groove and the semicircular groove are opposite to each other to form a complete annular groove. A plurality of equal-diameter locking balls 5-4 are loaded into the annular groove through the pitching hole to fill the annular groove, and a pressure ball 5-3 is installed in the pitching hole. A locking sleeve 5-1 is mounted on the outside of the necking step and the locking sleeve 5-1 is fixed by a fixing nail 5-5.

[0029] To sum up, the downhole vibration oil production power converter can convert the power generated by the ground pumping unit, the linear motor in the wellbore or the water-powered piston in the warp barrel into the power required for downhole artificial vibration oil production, and the vibration intensity and vibration frequency can be adjusted, realizing the complete process of artificial downhole vibration oil production with power conversion between the ground and the well, achieving the purpose of one-point vibration and multiple wells being effective. When working, it can produce a relatively strong vibration effect on the oil layer, thereby effectively improving the effect of oil field development, and transferring the ground vibration source to the well, which not only overcomes the damage of vibration to surface equipment and personnel, but also avoids the waste of vibration energy. The process method adopted by this device is simple, easy to use, and conducive to promotion and application. It is suitable for various types of oil field development, especially suitable for development blocks with intensive heavy oil well layout, various contaminated oil layer blocks and water areas with slow results.

[0030] The above technical solutions only reflect the preferred technical solutions of the technical solutions of the present invention. Some changes that may be made to certain parts thereof by technicians in this technical field all reflect the principles of the present invention and fall within the protection scope of the present invention.

Claims

1. A downhole vibration oil production power converter, characterized in that: The invention comprises an oil pipe coupling (1), wherein the upper end of the oil pipe coupling (1) is connected to the oil pipe, and the lower end of the oil pipe coupling (1) is sequentially equipped with a connecting short circuit (3), a push cylinder sleeve short circuit (6), an outer sleeve (10), a connecting rod sealing assembly (13) and a lower connecting short circuit (14) from top to bottom, wherein a push cylinder sleeve (8) is embedded in the outer sleeve (10), a pressure relief groove (8-1) is provided on the inner wall surface of the push cylinder sleeve (8), the lower connecting short circuit (14) is connected to the bottom hole accessories, and a pressure relief groove (8-1) is provided in the oil pipe coupling (1). A disconnector connector (2) is provided, the upper end of the disconnector connector (2) is connected to the disconnector, and the lower end is connected to the vibration cylinder sleeve (4), a pushing piston assembly (9) is installed at the lower end of the vibration cylinder sleeve (4), a vibration piston (5) is slidably arranged in the vibration cylinder sleeve (4), the lower end of the vibration piston (5) is connected to a connecting rod (11), the lower end of the connecting rod (11) is connected to a hammer head (15), and a sealing ring (12) is used to slide and seal between the connecting rod (11) and the connecting rod seal assembly (13); The pushing piston assembly (9) comprises a pushing piston assembly connecting sleeve (9-1), the pushing piston assembly connecting sleeve (9-1) being mounted on the lower end of the vibration cylinder sleeve (4) and connected to the sealing valve ball pressing sleeve (9-3), the sealing valve ball (9-2) being sleeved on the sealing valve ball pressing sleeve (9-3), the lower end of the sealing valve ball (9-2) being axially limited by a step on the sealing valve ball pressing sleeve (9-3), and the upper end being axially compressed by the pushing piston assembly connecting sleeve (9-1) to form a sealing valve ball (9-2). The sealing valve ball sleeve (9-3) is provided with a retaining ring (9-4) at the lower end thereof, the retaining ring (9-4) is assembled and connected with the sealing valve ball sleeve (9-3) through a retaining ring fixing pin (9-5), and a liquid inlet channel (9-6) is provided on the side wall of the retaining ring (9-4), and a push piston (9-7) matching with the retaining ring (9-4) is sleeved on the outer side of the sealing valve ball sleeve (9-3), and the push piston (9-7) is slidably sealed with the inner wall of the push cylinder sleeve (8).

2. A downhole vibration oil production power converter according to claim 1, characterized in that: The inner through hole of the push piston (9-7) is a stepped hole and is arranged in sequence from top to bottom as a small diameter section and a necked section, the diameter of the small diameter section is smaller than the diameter of the necked section, the end face of the small diameter section is chamfered at a certain angle and the chamfered surface is smooth to form a valve seat.

3. A downhole vibration oil production power converter according to claim 2, characterized in that: The outer side surface of the retaining ring (9-4) is provided with a plurality of through grooves along the axial direction as liquid inlet channels (9-6), the groove wall outer diameter of the through grooves being slightly smaller than the diameter of the reduced diameter section of the pushing piston (9-7), and the pushing piston (9-7) can be driven to move synchronously along the axial direction through the groove wall of the retaining ring (9-4).

4. A downhole vibration oil production power converter according to claim 1, characterized in that: A plurality of annular sand prevention grooves (5-1) are arranged on the outer surface of the vibration piston (5), and the lower end of the vibration piston (5) is a reduced diameter structure.

5. A downhole vibration oil production power converter according to claim 4, characterized in that: An inner shaft hole is provided at the lower end of the reduced diameter structure of the vibration piston (5), a semicircular groove is provided on the inner wall surface of the inner shaft hole, and a ball-casting hole with a vertical axis and the same diameter as the groove is drilled at a position opposite to the groove and communicated with the inner shaft hole.

6. A downhole vibration oil production power converter according to claim 5, characterized in that: The upper end of the connecting rod (11) is provided with a reduced diameter step whose diameter is slightly smaller than the inner shaft hole at the lower end of the vibration piston (5); a semicircular annular groove is provided on the side wall of the reduced diameter step, and the diameter of the semicircular annular groove is the same as the diameter of the semicircular groove of the inner shaft hole of the vibration piston (5).

7. A downhole vibration oil production power converter according to claim 6, characterized in that: The necked step of the connecting rod (11) is inserted into the inner shaft hole at the lower end of the vibrating piston (5) so that the semicircular annular groove and the semicircular groove are opposite to each other to form a complete annular groove. A plurality of locking balls (5-4) of equal diameter are loaded into the annular groove through the ball-throwing hole to fill the annular groove. A pressure ball (5-3) is then loaded into the ball-throwing hole. A locking sleeve (5-2) is mounted on the outside of the necked step and the locking sleeve (5-2) is fixed by a fixing nail (5-5).

8. A downhole vibration oil production power converter according to claim 1, characterized in that: The outer surface of the pushing piston (9-7) is smooth and is provided with a plurality of shallow annular grooves along the circumferential direction.

9. A downhole vibration oil production power converter according to claim 1, characterized in that: The two ends of the push cylinder sleeve (8) are fixed by the push cylinder sleeve short circuit (6) and the outer sleeve (10), and sealing sections are arranged at both ends to seal with the outer sleeve (10) through end sealing rings (7).

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