Hydraulic jet hole cleaning and sand washing integrated device
By designing a hydraulic jet hole and sand cleaning integrated device, combining the straightening structure and self-pressurizing nozzle, the sand cleaning and hole cleaning operation is achieved, solving the problem of working fluid leakage caused by low formation pressure, and improving the working efficiency and environmental protection effect.
Patent Information
- Application Number
- CN202421784851.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-26
- Publication Date
- 2025-04-18
- Estimated Expiration
- 2034-07-26
AI Technical Summary
In the development of heavy oil steam throughput in Liaohe, the formation pressure is low, resulting in serious loss of working fluid during sand flushing and well washing, resulting in reduced oil layer damage and penetration capacity. The existing technology requires sand cleaning and hole cleaning operations separately, which will take a long time, have a high labor intensity, and have a negative impact on the environment.
A hydraulic jet drilling and sand-pulling integrated device is designed, including coupling, jet drilling main pipe, speed control ring, valve ball, jet drilling body, self-pressurizing nozzle, nozzle sealing ring and sand-pulling pen tip. The center position of the pipe column is ensured through the straightening structure, and the integrated sand-pulling and hole cleaning operation is achieved.
The integration of sand flushing and hole cleaning operations has been achieved, which shortens the working time, reduces labor intensity, reduces environmental pollution, and improves technical results.
Smart Images
Figure CN222772197U_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the field of structural design and application technology of a sand flushing device in the field of oil production engineering, and in particular provides a hydraulic jet hole cleaning and sand flushing integrated device. Background Art
[0002] The steam huff and puff development of Liaohe heavy oil has entered the middle and late stages. With an average of more than 20 rounds of huff and puff, the pressure coefficient of the heavy oil formation has gradually reached a new low, averaging 0.10-0.22. The formation pressure is low, and the working fluid is seriously lost during the sand flushing and well washing operations, causing serious damage to the oil layer and seriously reducing the formation permeability. In order to solve the low permeability of the near-wellbore area, the wellbore is first sand-flushed, and after the sand is flushed, the string is pulled out and the hydraulic jet cleaning string is lowered for hole cleaning operations. The operation time is long and the labor intensity is high, and each operation will have a negative impact on the environment.
[0003] People are eager to obtain an integrated hydraulic jet hole cleaning and sand flushing device with excellent technical effects. Summary of the invention
[0004] The purpose of the present invention is to provide an integrated device for hydraulic jet hole cleaning and sand flushing with excellent technical effects, so as to realize the integrated completion of hydraulic jet hole cleaning and sand flushing operations.
[0005] The present invention provides an integrated device for hydraulic jet hole cleaning and sand flushing, comprising: a coupling, a jet orifice ejector main body pipe, a speed control ring, a valve ball, an ejector body, a self-pressurizing nozzle, a nozzle sealing ring, and a sand flushing pen tip; wherein, a straightening structure is arranged on the outer side of the jet orifice ejector main body pipe, the speed control ring is connected to the jet orifice ejector main body pipe, one end of the jet orifice ejector main body pipe is connected to one end of the coupling, the other end of the jet orifice ejector main body pipe is connected to one end of the ejector body, the other end of the ejector body is connected to the sand flushing pen tip, the valve ball and the nozzle sealing ring are respectively located on the inner side of the ejector body, and the self-pressurizing nozzle is located in the middle of the ejector body.
[0006] Internal threads are provided at both ends of the coupling to connect with the jet orifice main body and other parts. Threads are provided on the middle outer side of the jet orifice main body to connect with the centralizer fixing ring. The jet orifice main body is provided with three steps on the outside, and the outer diameter gradually decreases. External threads are provided at the end of the smallest step to connect with the coupling. Four steps are machined inside the main body pipe, and the inner diameter gradually decreases. Internal threads are provided inside the first step to connect with the speed control ring sleeve. A ball locking semicircular groove and a sealing ring groove are provided at the third step. A ball adding hole is drilled on the outside opposite to the semicircular groove. Threads are provided inside the connecting end of the ejector body and the sandblasting pen tip to facilitate the connection with the sandblasting pen tip. The outer diameter of the middle part of the ejector body is larger than that of the upper and lower parts. A stepped hole matching the self-pressurizing nozzle is provided in the middle part of the ejector body. The speed control ring is provided at the second step and its inner diameter is the same as that of the third step. The self-boosting nozzle is connected to the stepped hole in the middle of the ejector body through a thread. There is a fluid channel inside the self-boosting nozzle that communicates with the inside of the ejector body. The self-boosting nozzle is symmetrically provided with radial jet channels and jet channels at a certain angle to the radial direction, which mainly play a role of rotating hole cleaning. At the same time, there are channels perpendicular to the center line of the pipe column that play a rotating role. The outside of the main body of the jet orifice ejector is machined with the fifth step, the sixth step, and the seventh step, and the outer diameter gradually decreases. The bottom of the seventh step is machined with an external thread to facilitate connection with other components. The inside of the main pipe is machined with the first step, the second step, the third step, and the fourth step holes, and the inner diameter gradually decreases. A threaded hole is machined inside the first step to facilitate connection with other components. A ball lock hole and a sealing ring hole are provided at the third step.
[0007] Preferably, the straightening structure comprises: a straightening device fixing ring, a straightening block locking ring, a straightening block, a pressure spring and a straightening block frame sleeve; wherein, the straightening block frame sleeve is located on the outside of the jet orifice main body tube, the straightening block is connected to the straightening block frame sleeve through the straightening block locking ring, the pressure spring is located in the cavity formed by the straightening block and the straightening block frame sleeve, and the straightening device fixing ring is connected to the outside of the jet orifice main body tube.
[0008] The straightening part is arranged outside the sixth step, and the straightening block frame sleeve is arranged outside the sixth step; the outer circumference of the two ends of the straightening block frame sleeve is turned with external threads to facilitate the connection with the straightening block locking ring, and grooves are arranged on the outer circumference of the straightening block frame sleeve, the number of which corresponds to the straightening block, the width is 2-3mm greater than the width of the straightening block, and the depth is 3-5mm greater than the thickness of the straightening block. The straightening block has a small outer diameter at both ends and a large outer diameter in the middle. N elastic component grooves are arranged inside the middle part. The number of straightening blocks is 3 but not limited to 3. The upper part of the pressure spring is against the straightening block, and the lower part is against the straightening block frame sleeve. Since the pressure spring is in a certain compression state during installation, the radial position of the straightening block is maintained. The straightening device fixing ring is connected to the seventh step through threads but not limited to threads to fix the axial position of the straightening block frame sleeve, and the straightening block frame sleeve can rotate freely relative to the sixth step. The straightening block locking ring is connected to the two ends of the straightening block frame sleeve through threads but not limited to threads to limit the radial range of activity of the straightening block.
[0009] Preferably, the nozzle sealing ring is connected to the inner side of the ejector body through a sealing ring fixing pin. The position of the nozzle sealing ring corresponds to the position of the self-pressurizing nozzle.
[0010] Preferably, a speed control ring sleeve is provided at the connection between the speed control ring and the jet orifice main body pipe. The speed control ring is connected to the jet orifice main body through threads, so that the speed control ring position is relatively fixed.
[0011] Preferably, the jet orifice main body tube is connected to the jet body through a rotating lock ball. On the third step, a sealing ring is provided at the lower part of the rotating lock ball.
[0012] Preferably, a dustproof sealing ring is provided between the jet orifice main body tube and the ejector body. Specifically, the dustproof sealing ring is between the bottom of the fourth step of the jet orifice main body tube and the end of the ejector body.
[0013] A sealing ring is arranged between the nozzle sealing ring and the ejector body.
[0014] A sealing ring is arranged between the self-pressurizing nozzle and the ejector body.
[0015] The integrated hydraulic jet hole cleaning and sand flushing device, when working, after being lowered to the designed depth according to the design plan, the outer diameter of the straightening structure is larger than the inner diameter of the casing. After being lowered into the wellbore, the straightening block is tightly against the casing wall under the action of the pressure spring to ensure that the pipe column is located on the center line of the casing. First, the sand flushing pen tip repeatedly breaks the sediment at the bottom of the well by lifting and lowering the pipe column, breaking the sand bridge and performing hydraulic sand flushing. After sand flushing to the bottom of the artificial well, a large displacement is returned. When the sand flushing fluid returned is free of sand, the circulation of the sand flushing fluid is stopped.
[0016] The pipe string is further lifted up until the self-pressurizing nozzle corresponds to the well section that needs to be cleaned. At this time, a valve ball is inserted into the pipe string from the wellhead, and sand flushing fluid is further injected into the pipe string. At this time, the valve ball acts on the nozzle sealing ring to block the downward passage of the liquid. The pressure acting on the valve ball gradually increases. When the force transmitted to the sealing ring fixing nail reaches its shearing pressure, the sealing ring fixing nail is sheared off, and the nozzle sealing ring moves downward. At this time, the passage between the pipe string and the self-pressurizing nozzle is opened, and the high-pressure flow passes through the radial channel of the self-pressurizing nozzle at a high speed. The outflow impacts the blockage in the near-wellbore area of the wellbore, and the flushed objects are deposited at the bottom of the well. At the same time, the channel perpendicular to the axial direction also sprays high-speed fluid, part of which acts on the wellbore wall for hole cleaning operations, and part of it provides rotational torque. At the same time, due to the speed control pressure ring, the conventional design mainly plays a speed limiting role, so that the speed of related components such as the self-pressurizing nozzle is limited to below the atomization speed to avoid the atomization phenomenon caused by excessive speed further affecting the hole cleaning effect. While cleaning the hole, it can move up and down as needed to clean the hole in different oil layers.
[0017] The integrated device for hydraulic jet hole cleaning and sand flushing includes a straightening structure, a hole cleaning structure, a sand flushing structure, and an opening structure; the straightening structure is arranged on the hole cleaning structure, the sand flushing structure is connected to the end of the hole cleaning structure, and an opening structure is arranged inside the hole cleaning structure, so that sand flushing and hole cleaning can be completed in one trip of the pipe column. The straightening structure includes a straightening device fixing ring, a straightening block locking ring, a straightening block, a pressure spring, and a straightening block frame sleeve; the hole cleaning structure includes an ejector body, a self-pressurizing nozzle, and a sealing ring; the sand flushing structure includes an ejector body, a sealing ring fixing nail, and a sand flushing pen tip; and the opening structure includes a valve ball, an ejector body, a sealing ring, a sealing ring fixing nail, and a nozzle sealing ring.
[0018] The integrated device for hydraulic jet hole cleaning and sand flushing of the present invention can realize the completion of hydraulic jet hole cleaning and sand flushing in one trip of the pipe string, that is, the hydraulic jet hole cleaning operation is performed after sand flushing of the pipe string in one trip. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments:
[0020] Figure 1 This is a schematic diagram of the structure of the integrated device for hydraulic jet hole cleaning and sand flushing;
[0021] Figure 2 Schematic diagram of the steps of the main body of the jet nozzle. DETAILED DESCRIPTION
[0022] Example 1
[0023] The present embodiment provides an integrated device for hydraulic jet hole cleaning and sand flushing, comprising: a coupling, a jet orifice ejector main tube 8, a speed control ring 12, a valve ball 14, an ejector body 15, a self-pressurizing nozzle 16, a nozzle sealing ring 20, and a sand flushing pen tip 21; wherein, a straightening structure is provided on the outer side of the jet orifice ejector main tube 8, the speed control ring 12 is connected to the jet orifice ejector main tube 8, one end of the jet orifice ejector main tube 8 is connected to one end of the coupling 1, the other end of the jet orifice ejector main tube 8 is connected to one end of the ejector body 15, the other end of the ejector body 15 is connected to the sand flushing pen tip 21, the valve ball 14 and the nozzle sealing ring 20 are respectively located on the inner side of the ejector body 15, and the self-pressurizing nozzle 16 is located in the middle of the ejector body 15.
[0024] Internal threads are provided at both ends of the coupling 1 to connect with the jet nozzle main body 8 and other components. The middle outer side of the jet nozzle main body 8 is provided with threads to connect with the centralizer fixing ring 2. The jet nozzle main body 8 is provided with three steps on the outside, and the outer diameter gradually decreases. External threads are provided at the end of the smallest step to connect with the coupling 1, see the attached Figure 2 , four steps are machined inside the main tube, and the inner diameter gradually decreases. An internal thread is arranged inside the first step 81 to connect with the speed control ring sleeve 13, and a ball locking semicircular groove and a sealing ring groove are arranged at the third step 83, and a ball adding hole is drilled on the outer side opposite to the semicircular groove. The inside of the connecting end of the ejector body 15 and the sandblasting pen tip 21 is provided with a thread to facilitate the connection with the sandblasting pen tip 21. The outer diameter of the middle part of the ejector body 15 is larger than that of the upper and lower parts, and a stepped hole is arranged in the middle part of the ejector body 15 to match the self-boosting nozzle 16. The speed control ring 12 is arranged at the second step 82 and the inner diameter is the same as the inner diameter of the third step 83. The self-boosting nozzle 16 is connected to the stepped hole in the middle of the ejector body 15 through a thread. There is a fluid channel inside the self-boosting nozzle 16 that communicates with the inside of the ejector body 15. The self-boosting nozzle is symmetrically provided with radial jet channels and jet channels at a certain angle to the radial direction, which mainly play a role of rotating hole cleaning. At the same time, there is a channel perpendicular to the center line of the pipe column that plays a rotating role. The outside of the main body 8 of the jet orifice ejector is machined with a fifth step 85, a sixth step 86, and a seventh step 87, and the outer diameter gradually decreases. The bottom of the seventh step 87 is machined with an external thread to facilitate connection with other components. The inside of the main body is machined with a first step 81, a second step 82, a third step 83, and a fourth step 84, and the inner diameter gradually decreases. A threaded hole is machined inside the first step 81 to facilitate connection with other components. A ball lock hole 22 and a sealing ring hole are provided at the third step 83.
[0025] Preferably, the straightening structure comprises: a straightening device fixing ring 2, a straightening block locking ring 3, a straightening block 4, a pressure spring 5, and a straightening block frame sleeve 6; wherein, the straightening block frame sleeve 6 is located on the outside of the jet orifice main body tube 8, the straightening block 4 is connected to the straightening block frame sleeve 6 through the straightening block locking ring 3, the pressure spring 5 is located in the cavity formed by the straightening block 4 and the straightening block frame sleeve 6, and the straightening device fixing ring 2 is connected to the outside of the jet orifice main body tube 8.
[0026] The straightening part is arranged outside the sixth step 86, and the straightening block frame 6 is arranged outside the sixth step 86; the outer circumference of the two ends of the straightening block frame 6 is threaded with external threads to facilitate the connection with the straightening block lock ring 3, and grooves are arranged on the outer circumference of the straightening block frame 6, the number of which corresponds to the straightening block 4, the width is 2-3mm greater than the width of the straightening block 4, and the depth is 3-5mm greater than the thickness of the straightening block. The straightening block 4 has a small outer diameter at both ends and a large outer diameter in the middle. N elastic component grooves are arranged inside the middle part, and the attached Figure 1 There are 5 of them, the number of the straightening blocks 4 is 3 but not limited to 3, the upper part of the pressure spring 5 abuts against the straightening block 4, and the lower part abuts against the straightening block frame sleeve 6. Since the pressure spring 5 is in a certain compression state during installation, the radial position of the straightening block 4 is maintained, and the straightening device fixing ring 2 is connected to the seventh step by threads but not limited to threads to fix the axial position of the straightening block frame sleeve 6, and the straightening block frame sleeve 6 can rotate freely relative to the sixth step 86. The straightening block locking ring 3 is connected to both ends of the straightening block frame sleeve 6 by threads but not limited to threads to limit the radial range of activity of the straightening block 4.
[0027] Preferably, the nozzle sealing ring 20 is connected to the inner side of the ejector body 15 via the sealing ring fixing pins 19. The position of the nozzle sealing ring 20 corresponds to the position of the self-pressurizing nozzle 16.
[0028] Preferably, a speed control ring pressing sleeve 13 is provided at the connection between the speed control ring 12 and the jet orifice main body pipe 8. The speed control pressing ring 13 is threadedly connected to the jet orifice main body 8, so that the speed control pressing ring 13 is relatively fixed in position.
[0029] Preferably, the jet orifice main body tube 8 is connected to the jet body 15 via a rotary lock ball 10. On the third step 83, a sealing ring 11 is provided at the lower part of the rotary lock ball.
[0030] Preferably, a dustproof sealing ring 9 is provided between the jet orifice main body tube 8 and the ejector body 15. Specifically, the dustproof sealing ring 9 is between the bottom of the fourth step of the jet orifice main body tube 8 and the end of the ejector body 15.
[0031] A sealing ring 11 is provided between the nozzle sealing ring 20 and the ejector body 15 .
[0032] A sealing ring 11 is provided between the self-pressurizing nozzle 16 and the ejector body 15 .
[0033] The hydraulic jet hole cleaning and sand flushing integrated device, when working, after being lowered to the designed depth according to the design scheme, the outer diameter of the straightening structure is larger than the inner diameter of the casing. After being lowered into the wellbore, the straightening block 4 is tightly against the casing wall under the action of the pressure spring 5 to ensure that the pipe column is located on the center line of the casing. First, the sand flushing pen tip 21 is repeatedly used to break the sediment at the bottom of the well by lifting and lowering the pipe column, breaking the sand bridge and performing hydraulic sand flushing. After sand flushing to the bottom of the artificial well, a large displacement is returned. When the sand flushing fluid returned is free of sand, the circulation of the sand flushing fluid is stopped.
[0034] The pipe string is further lifted up until the self-boosting nozzle 16 corresponds to the well section that needs to be cleaned. At this time, the valve ball 14 is inserted into the pipe string from the wellhead, and the sand flushing liquid is further injected into the pipe string. At this time, the valve ball 14 acts on the nozzle sealing ring 20 to block the downward passage of the liquid. The pressure acting on the valve ball 14 gradually increases. When the force transmitted to the sealing ring fixing nail 19 reaches its shearing pressure, the sealing ring fixing nail 19 is sheared off, and the nozzle sealing ring 20 moves downward. At this time, the passage between the pipe string and the self-boosting nozzle 16 is opened, and the high-pressure flow passes through the self-boosting nozzle 1 The radial channel 6 flows out at a high speed to impact the blockage in the near-wellbore area of the wellbore, and the ejected objects are deposited at the bottom of the well. At the same time, the channel perpendicular to the axial direction also sprays high-speed fluid, part of which acts on the wellbore wall for hole cleaning, and part of which provides rotational torque. At the same time, due to the speed control pressure ring 13, the conventional design mainly plays a speed limiting role, so that the speed of related components such as the self-pressurizing nozzle 16 is limited to below the atomization speed to avoid the atomization phenomenon caused by excessive speed further affecting the hole cleaning effect. During the hole cleaning operation, it can move up and down as needed to clean the hole for different oil layers.
[0035] The integrated device for hydraulic jet hole cleaning and sand flushing includes a straightening structure, a hole cleaning structure, a sand flushing structure, and an opening structure; the straightening structure is arranged on the hole cleaning structure, the sand flushing structure is connected to the end of the hole cleaning structure, and an opening structure is arranged inside the hole cleaning structure, so that sand flushing and hole cleaning can be completed in one trip of the pipe column. The straightening structure includes a straightening device fixing ring 2, a straightening block locking ring 3, a straightening block 4, a pressure spring 5, and a straightening block frame sleeve 6; the hole cleaning structure includes an ejector body 15, a self-pressurizing nozzle 16, and a sealing ring 11; the sand flushing structure includes an ejector body 15, a sealing ring fixing nail 19, and a sand flushing pen tip 21; and the opening structure includes a valve ball 14, an ejector body 15, a sealing ring 11, a sealing ring fixing nail 19, and a nozzle sealing ring 20.
Claims
1. A hydraulic jet hole cleaning and sand flushing integrated device, characterized in that: The integrated device for hydraulic jet hole cleaning and sand flushing comprises: a coupling (1), a jet orifice ejector main body tube (8), a speed control ring (12), a valve ball (14), an ejector main body (15), a self-pressurizing nozzle (16), a nozzle sealing ring (20), and a sand flushing pen tip (21); wherein a straightening structure is arranged on the outer side of the jet orifice ejector main body tube (8), the speed control ring (12) is connected to the jet orifice ejector main body tube (8), one end of the jet orifice ejector main body tube (8) is connected to one end of the coupling (1), the other end of the jet orifice ejector main body tube (8) is connected to one end of the ejector main body (15), the other end of the ejector main body (15) is connected to the sand flushing pen tip (21), the valve ball (14) and the nozzle sealing ring (20) are respectively located on the inner side of the ejector main body (15), and the self-pressurizing nozzle (16) is located in the middle of the ejector main body (15).
2. The integrated device for hydraulic jet hole cleaning and sand flushing according to claim 1, characterized in that: The straightening structure comprises: a straightening device fixing ring (2), a straightening block locking ring (3), a straightening block (4), a pressure spring (5), and a straightening block frame sleeve (6); wherein the straightening block frame sleeve (6) is located outside the jet orifice main body tube (8), the straightening block (4) is connected to the straightening block frame sleeve (6) through the straightening block locking ring (3), the pressure spring (5) is located in a cavity formed by the straightening block (4) and the straightening block frame sleeve (6), and the straightening device fixing ring (2) is connected to the outside of the jet orifice main body tube (8).
3. The integrated device for hydraulic jet hole cleaning and sand flushing according to claim 2 is characterized in that: The nozzle sealing ring (20) is connected to the inner side of the ejector body (15) via a sealing ring fixing pin (19).
4. The integrated device for hydraulic jet hole cleaning and sand flushing according to claim 3 is characterized in that: A speed control ring pressing sleeve (13) is provided at the connection between the speed control ring (12) and the jet orifice device main body tube (8).
5. The integrated device for hydraulic jet hole cleaning and sand flushing according to claim 4 is characterized in that: The jet orifice main body tube (8) is connected to the jet orifice body (15) via a rotating locking ball (10).
6. The integrated device for hydraulic jet hole cleaning and sand flushing according to claim 5, characterized in that: A dustproof sealing ring (9) is provided between the jet orifice main body tube (8) and the jet orifice body (15).
7. The integrated device for hydraulic jet hole cleaning and sand flushing according to claim 6, characterized in that: A sealing ring (11) is provided between the nozzle sealing ring (20) and the ejector body (15).
8. The integrated device for hole cleaning and sand flushing by hydraulic jetting according to any one of claims 1 to 7, characterized in that: A sealing ring (11) is provided between the self-pressurizing nozzle (16) and the ejector body (15).