CN212898389U - Fluid self-excitation pressure pulse oscillation generating device - Google Patents
Fluid self-excitation pressure pulse oscillation generating device Download PDFInfo
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- CN212898389U CN212898389U CN202021420092.6U CN202021420092U CN212898389U CN 212898389 U CN212898389 U CN 212898389U CN 202021420092 U CN202021420092 U CN 202021420092U CN 212898389 U CN212898389 U CN 212898389U
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Abstract
The utility model relates to a fluid self-excited pressure pulse oscillation generating device, which comprises a central tube, a fixed sleeve and a movable sleeve which are sleeved outside the central tube, wherein an annular gap with an opening facing the movable sleeve is arranged between the fixed sleeve and the central tube, and the wall of the central tube is provided with a through hole which communicates the annular gap with the inner cavity of the central tube; the movable sleeve comprises an opening and closing section and an extending section, the opening and closing section is in sealing sliding connection with the central pipe, an annular cavity is arranged between the opening and closing section and the central pipe, the cross sectional area of the annular cavity is larger than that of the annular gap, and a nozzle communicated with the annular cavity and the inner cavity of the central pipe is further arranged on the pipe wall of the central pipe. The utility model discloses utilize the pressure differential to make the upper and lower reciprocating motion of movable sleeve to make the nozzle in turn by the shutoff with open, power liquid passes through the nozzle and frequently spouts in turn to the production zone, produces pressure pulse, can greatly improve the unblocking effect of oil-water well.
Description
Technical Field
The utility model relates to an oil field oil-water well removes stifled operation supporting device field in the pit, especially involves a fluid self excitation pressure pulse shock generating device.
Background
At present, the technical measures of oil well production increase and oil well injection increase are acidification and fracturing, and the purpose of acidification is to remove plugs at a production layer, a well cementation cement sheath thereof and a shaft channel so as to improve the permeability from a stratum to a shaft; the purpose of fracturing is to artificially create fractures in the production zone of an oil (water) well by using high-pressure power fluid and fill proppants to improve the permeability of the oil (water) well. The vibration plugging removal process technology is currently applied to certain specific blocks of oil fields, such as low permeability oil fields, and although a certain effect is achieved on the site, the vibration plugging removal process technology exists to different degrees: high requirements on well conditions, poor working reliability, complex process, complex structure of matched tools, low effective power for removing blockage and the like.
SUMMERY OF THE UTILITY MODEL
The utility model discloses to prior art not enough, provide a fluid self-excited pressure pulse vibrates generating device, through the nozzle to the frequent alternate blowout power liquid of production zone, produce pressure pulse, utilize pressure pulse's shock and sweep effect, reduce the adhesive force of filth and the rheological property of crude oil to reach the permeability that improves the production zone.
The utility model is realized by the following technical proposal, the utility model provides a fluid self-excited pressure pulse oscillation generating device, which comprises a central tube, a fixed sleeve and a movable sleeve which are sleeved on the central tube, wherein the fixed sleeve is fixedly connected with the central tube in a sealing way, an annular gap with an opening facing the movable sleeve is arranged between the fixed sleeve and the central tube, and a through hole which is communicated with the annular gap and the inner cavity of the central tube is arranged on the tube wall of the central tube; the movable sleeve comprises a starting and closing section and an extending section extending into the annular gap, the inner surface and the outer surface of the extending section are respectively matched with the outer surface of the central pipe and the inner surface of the fixed sleeve, the starting and closing section is in sealing sliding connection with the central pipe, an annular cavity is arranged between the starting and closing section and the central pipe, the cross section area of the annular cavity is larger than that of the annular gap, a nozzle for communicating the annular cavity with the inner cavity of the central pipe is further arranged on the pipe wall of the central pipe, and the axial distance between one end, far away from the fixed sleeve, of the movable sleeve and the nozzle is smaller than that between the opening end.
According to the scheme, the annular gap is arranged, and the power liquid is sprayed into the annular gap through the nozzle, so that the pressure required by pushing the movable sleeve to descend in the annular cavity between the upper end of the movable sleeve and the central pipe is established; an annular cavity is formed between the movable sleeve and the outer cylindrical surface of the lower part of the central pipe, so that the flow resistance of power fluid in the annular cavity when the power fluid flows outwards is established, the fluid pressure in the annular cavity is established, and the movable sleeve can move upwards under the pushing of differential force. By utilizing the area difference between the annular gap and the annular cavity, the movable sleeve reciprocates up and down under the action of differential force to alternately open and close the nozzle. When the movable sleeve moves upwards to a certain position, the nozzle is opened, a bundle of high-pressure liquid is sprayed outwards, at the moment, the annular cavity is communicated with the outside, the pressure of the liquid in the cavity is reduced, the movable sleeve moves downwards under the pushing of the high-pressure liquid in the annular gap, the movable sleeve closes the nozzle, so that the power liquid in the central tube is isolated from the outside, meanwhile, the annular cavity is closed, the pressure is established due to the communication between the nozzle and the inner cavity of the central tube, the equal pressure of the liquid in the annular gap and the annular cavity is realized, and the movable sleeve moves upwards under the action of differential force. The device alternately reciprocates in such a way, intermittently ejects pressure pulse liquid with a certain frequency and a higher peak value, the high-pressure pulse liquid vibrates to generate strong effects of erosion, stripping, micro-seam making and the like on a production layer, and when the flow rate of the power liquid is proper, the device can generate a resonance effect and a cavitation effect, and because the pressure pulse frequency wave generated by the device is low and the intensity is large, the attenuation is small when the device is transmitted in a stratum, and the sweep range is large.
Preferably, the inner surface of the extending section is provided with a plurality of first annular grooves distributed along the axial direction. This optimization scheme has both guaranteed the sealed of moving sleeve with center tube outer cylindrical surface through being provided with first ring channel at the internal surface that stretches into the section, has reduced the frictional force when reciprocating motion about the moving sleeve again to reciprocating motion about the moving sleeve has played fine radial rightting effect.
Preferably, the inner surface of the opening and closing section is also provided with a plurality of second annular grooves distributed along the axial direction. According to the optimized scheme, the second annular groove is formed in the inner surface of the opening and closing section, so that the friction force generated when the movable sleeve reciprocates up and down is further reduced, and the movable sleeve reciprocates up and down to further strengthen the effect.
Preferably, one end of the central tube is provided with an internal thread, and the other end of the central tube is provided with an external thread. This optimization scheme sets up internal thread and external screw thread respectively with the both ends of center tube, and the convenience is connected with oil pipe coupling, oil pipe nipple joint, has improved the convenience of using.
As optimization, an annular limiting table with the outer diameter larger than the inner diameter of the opening and closing section is arranged on the central pipe on one side, away from the fixed sleeve, of the movable sleeve. This optimization scheme is through setting up the spacing platform of annular, when moving the cover and keeping away from fixed cover and remove, moves the cover and carries out spacing blockking, prevents to move the cover and deviate from the annular space to guarantee to move the continuity of upper and lower reciprocating motion of cover, improve the continuity that the device used.
Preferably, the axial distance between the open end of the annular gap and the through hole is greater than the length of the extending section. Through the setting of this optimization scheme for go deep into the section can all extend in the annular space, and can guarantee to move the smooth reciprocating motion of cover.
Preferably, the nozzles and the through holes are uniformly distributed along the circumferential direction. The setting of this optimization scheme has increased the blowout volume of power liquid, makes the removal of movable sleeve nimble more quick, improves the impact effect.
The use method of the fluid self-excitation pressure pulse oscillation generating device comprises the following steps:
1. connecting two ends of a central pipe in a pressure pipeline, wherein the pressure pipeline is communicated with a pumping device, and high-pressure power liquid is introduced into an inner cavity of the central pipe by the pumping device, and the pumping device is a ground pump or a pump truck;
2. when the nozzle driven sleeve is closed, the liquid pressure in the annular gap and the annular cavity is equal, and the cross section area of the annular cavity is larger than that of the annular gap, so that liquid differential force acting upwards on the movable sleeve is generated, the movable sleeve moves upwards by overcoming the gravity of the movable sleeve, and the nozzle is opened;
3. high-pressure liquid in the inner cavity of the central pipe is sprayed outwards through the nozzle to form pressure shock waves to a production layer, a cement sheath channel hole and the inner wall of the casing pipe;
4. the annular cavity is communicated with the annular space of the oil-water well and the stratum by the upward movement of the movable sleeve, the liquid pressure in the annular gap is higher than the liquid pressure in the annular cavity by utilizing the throttling resistance when liquid is sprayed out through the nozzle, so that the force for pushing the movable sleeve downwards is generated by the action of the liquid with higher pressure on the cross section of the annular gap and is larger than the force for pushing the movable sleeve upwards generated by the action of the liquid with lower pressure on the cross section of the annular cavity, the movable sleeve downwards moves under the combined action of the gravity and the hydraulic power and closes the nozzle again, the high-pressure power liquid sprayed out to the annular space of the oil-water well and the stratum through the nozzle disappears, and the pressure shock wave disappears;
5. and (5) repeating the step (2-4), and enabling the sleeve to reciprocate up and down, so that the nozzle alternately generates pressure pulses directly facing the production layer.
The utility model has the advantages that: the pressure difference is utilized to make the upper and lower reciprocating motion of the movable sleeve, so that the nozzle is alternatively blocked and opened, the power fluid is frequently and alternatively sprayed to a production layer through the nozzle to generate pressure pulse, the blockage removing effect of the oil-water well can be greatly improved, the blockage removing operation radius is increased, the blockage removing operation validity period is prolonged, and the movable sleeve has very important practical significance for increasing the yield of the oil well of the oil field, increasing the injection of the water well and improving the final recovery ratio of the oil field.
Drawings
FIG. 1 is a schematic structural view of the present invention;
shown in the figure:
1. the device comprises a central tube, 11, external threads, 12, a central tube inner cavity, 13, a connecting structure, 14, a through hole, 15, a central tube outer surface, 16, an opening and closing section, 17, internal threads, 2, a fixing sleeve, 21, an annular gap, 22, a fixing sleeve inner surface, 3, a movable sleeve, 31, a first annular groove, 32, an extending section, 33, an outer surface, 34, an inner surface, 35, an annular cavity, 36, a limiting table, 4 and a nozzle.
Detailed Description
In order to clearly illustrate the technical features of the present solution, the present solution is explained below by way of specific embodiments.
As shown in figure 1, a fluid self-excited pressure pulse oscillation generating device comprises a central tube 1, a fixed sleeve 2 and a movable sleeve 3 which are sleeved on the central tube 1, wherein the fixed sleeve 2 is positioned above the movable sleeve 3, the lower end of the central tube is provided with an internal thread 17 for being connected with an oil tube nipple, and the upper end of the central tube is provided with an external thread 11 for being connected with an oil tube coupling.
The upper end of the inner hole of the fixed sleeve 2 is fixedly connected with the central tube 1 in a sealing way through the connecting structure 13, the inner hole can be welded, the central tube and the fixed sleeve can be fixed in a sealing way through the sealing ring arranged between the central tube and the fixed sleeve, the annular gap 21 between the fixed sleeve and the central tube is arranged below the connecting structure, the opening of the annular gap 21 faces the movable sleeve, the central tube wall is provided with four through holes 14 for communicating the annular gap with the inner cavity 12 of the central tube, and the through holes are uniformly distributed along the circumferential direction.
The movable sleeve 3 comprises a starting and closing section 16 and an extending section 32 extending into the annular gap 21, the starting and closing section and the extending section are coaxial, the outer diameter of the starting and closing section is larger than that of the extending section, and the inner diameter of the starting and closing section is larger than that of the extending section. The inner surface 34 of the extending section 32 is matched with the outer surface 15 of the central pipe, and the outer surface 33 of the extending section 32 is matched with the inner surface 22 of the fixing sleeve, namely the extending section is in sealing sliding connection with the fixing sleeve and the central pipe. The axial distance between the open end of the annular space and the through hole 14 is greater than the length of the protruding section.
The opening and closing section 16 is in sealing sliding connection with the central pipe, an annular cavity 35 is arranged between the opening and closing section and the central pipe, the cross sectional area of the annular cavity 35 is larger than that of the annular gap 21, four nozzles 4 communicating the annular cavity with the inner cavity of the central pipe are further arranged on the pipe wall of the central pipe, and the nozzles are uniformly distributed along the circumferential direction. The axial distance between one end of the movable sleeve far away from the fixed sleeve and the nozzle is smaller than the axial distance between the opening end of the annular gap and the through hole.
The inner surface of the extending section and the inner surface of the opening and closing section are respectively provided with a plurality of first annular grooves 31 and second annular grooves which are distributed along the axial direction, and the first annular grooves and the second annular grooves are communicated along the circumferential direction. Through being provided with first and second annular groove, both guaranteed the sealed of moving sleeve with the outer cylindrical surface of center tube within a definite time, reduced the frictional force when moving sleeve up and down reciprocating motion again to moving sleeve up and down reciprocating motion has played fine radial rightting effect.
And an annular limiting table 36 with the outer diameter larger than the inner diameter of the opening and closing section is arranged on the central pipe on one side of the movable sleeve, which is far away from the fixed sleeve, and the limiting table is in sealing contact with the end surface of the opening and closing section.
When the movable sleeve 3 moves upwards to open the nozzle 4, the flow resistance of high-pressure power liquid in the annular gap 21 is established when the high-pressure power liquid flows to the annular cavity by utilizing the matching among the first annular groove 31, the middle outer cylindrical surface of the central tube 1 and the upper inner cylindrical surface 3 of the movable sleeve 3 and the matching among the inner cylindrical surface of the fixed sleeve 2 and the upper outer cylindrical surface of the movable sleeve 3, and an annular gap which is a liquid containing cavity is formed, so that the liquid pressure in the annular gap is established.
When the movable sleeve 3 moves downwards to close the nozzle, a liquid containing cavity, namely an annular cavity, is formed by matching the annular groove with the inner cylindrical surface at the lower end of the movable sleeve 3 and the outer cylindrical surface at the lower end of the central tube 1, so that the liquid pressure in the annular cavity is established.
The use method of the fluid self-excitation pressure pulse oscillation generating device comprises the following steps:
1. connecting two ends of a central pipe in a pressure pipeline, wherein the pressure pipeline is communicated with a ground pump or a pump truck, and introducing high-pressure power liquid into the inner cavity of the central pipe by the ground pump or the pump truck;
2. when the nozzle driven sleeve is closed, the liquid pressure in the annular gap and the annular cavity is equal, and the cross section area of the annular cavity is larger than that of the annular gap, so that liquid differential force acting upwards on the movable sleeve is generated, the movable sleeve moves upwards by overcoming the gravity of the movable sleeve, and the nozzle is opened;
3. high-pressure liquid in the inner cavity of the central pipe is sprayed outwards through the nozzle to form pressure shock waves to a production layer, a cement sheath channel hole and the inner wall of the casing pipe;
4. the annular cavity is communicated with the annular space of the oil-water well and the stratum by the upward movement of the movable sleeve, the liquid pressure in the annular gap is higher than the liquid pressure in the annular cavity by utilizing the throttling resistance when liquid is sprayed out through the nozzle, so that the force for pushing the movable sleeve downwards generated by the action of the liquid with higher pressure on the cross section of the annular gap is larger than the force for pushing the movable sleeve upwards generated by the action of the liquid with lower pressure on the cross section of the lower annular cavity, the movable sleeve downwards moves under the combined action of the gravity and the hydraulic power and closes the nozzle again, the high-pressure power liquid sprayed out to the annular space of the oil-water well and the stratum through the nozzle disappears, and the pressure shock wave disappears;
5. and (5) repeating the step (2-4), and enabling the sleeve to reciprocate up and down, so that the nozzle alternately generates pressure pulses directly facing the production layer.
Of course, the above description is not limited to the above examples, and technical features of the present invention that are not described in the present application may be implemented by or using the prior art, and are not described herein again; the above embodiments and drawings are only used for illustrating the technical solutions of the present invention and are not intended to limit the present invention, and the present invention has been described in detail with reference to the preferred embodiments, and those skilled in the art should understand that changes, modifications, additions or substitutions made by those skilled in the art within the spirit of the present invention should also belong to the protection scope of the claims of the present invention.
Claims (7)
1. A fluid self-excited pressure pulse oscillation generating device is characterized in that: the device comprises a central tube (1), and a fixed sleeve (2) and a movable sleeve (3) which are sleeved outside the central tube (1), wherein the fixed sleeve (2) is fixedly connected with the central tube (1) in a sealing manner, an annular gap (21) with an opening facing the movable sleeve (3) is arranged between the fixed sleeve (2) and the central tube (1), and a through hole (14) for communicating the annular gap (21) with an inner cavity of the central tube (1) is formed in the tube wall of the central tube (1);
move cover (3) including opening and closing section (16) and stretch into section (32) in extending annular space (21), the internal surface, the surface that stretch into section (32) cooperate with center tube surface (15), fixed cover internal surface (22) respectively, open and close section (16) and center tube (1) sealed sliding connection and be equipped with annular cavity (35) opening and close between section (16) and center tube (1), the cross-sectional area of annular cavity (35) is greater than the cross-sectional area of annular space (21), still is equipped with nozzle (4) of intercommunication annular cavity (35) and center tube (1) inner chamber on center tube (1) pipe wall, moves the axial distance between one end and nozzle (4) of keeping away from fixed cover (2) on cover (3) and is less than the axial distance between annular space (21) open end and through-hole (14).
2. The self-exciting fluidic pressure pulse oscillation generating device of claim 1, wherein: the inner surface of the extending section (32) is provided with a plurality of first annular grooves (31) distributed along the axial direction.
3. The self-excited pressure pulse oscillation generating device of claim 2, wherein: the inner surface of the opening and closing section (16) is also provided with a plurality of second annular grooves distributed along the axial direction.
4. The self-exciting fluidic pressure pulse oscillation generating device of claim 1, wherein: one end of the central tube (1) is provided with an internal thread (17), and the other end of the central tube is provided with an external thread (11).
5. The self-exciting fluidic pressure pulse oscillation generating device of claim 1, wherein: an annular limiting table (36) with the outer diameter larger than the inner diameter of the opening and closing section (16) is arranged on the central pipe (1) on one side of the movable sleeve (3) far away from the fixed sleeve (2).
6. The self-exciting fluidic pressure pulse oscillation generating device of claim 1, wherein: the axial distance between the open end of the annular gap (21) and the through hole (14) is larger than the length of the extending section (32).
7. The self-exciting fluidic pressure pulse oscillation generating device of claim 1, wherein: the nozzles (4) and the through holes (14) are uniformly distributed along the circumferential direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021420092.6U CN212898389U (en) | 2020-07-19 | 2020-07-19 | Fluid self-excitation pressure pulse oscillation generating device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021420092.6U CN212898389U (en) | 2020-07-19 | 2020-07-19 | Fluid self-excitation pressure pulse oscillation generating device |
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| CN212898389U true CN212898389U (en) | 2021-04-06 |
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| CN202021420092.6U Active CN212898389U (en) | 2020-07-19 | 2020-07-19 | Fluid self-excitation pressure pulse oscillation generating device |
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