CN218177177U

CN218177177U - Throwing type double-jet flow underground blockage removing device

Info

Publication number: CN218177177U
Application number: CN202222803567.5U
Authority: CN
Inventors: 张广卿; 仇光录
Original assignee: Shandong Chenglin Petroleum Engineering Technology Co ltd
Current assignee: Shandong Chenglin Petroleum Engineering Technology Co ltd
Priority date: 2022-10-25
Filing date: 2022-10-25
Publication date: 2022-12-30
Anticipated expiration: 2032-10-25

Abstract

The utility model provides a formula of can throwing double jet flows in pit separates stifled device relates to oil field work production technical field, the installation comprises a sleeve, the sheathed tube inboard is provided with oil pipe, oil pipe's bottom is connected with the suction ejector, the bottom of suction ejector is connected with slip formula packer, the bottom of slip formula packer is connected with the sand blocking leather cup, the bottom of sand blocking leather cup is connected with washes ejector one, the bottom that washes ejector one is connected with interior center tube, the bottom of interior center tube is connected with washes ejector two. The utility model discloses a one-trip tubular column can realize washing stratum and perforation porthole high pressure in the well, and harder plug is washed out, is broken into pieces, becomes flexible and returns out along with the circulation liquid by the efflux, realizes that jet flow removes near well jam in advance through one-trip tubular column simultaneously, carries out upper portion high pressure jet suction then, makes the plug in near well and far wellbore area by the discharge stratum to make the unblock function strengthened, furthest resumes stratum seepage flow ability.

Description

Throwing type double-jet flow underground blockage removing device

Technical Field

The utility model relates to an oil field operation production technical field especially relates to a can throw stifled device of two efflux in pit of formula.

Background

In the production process of an oil field, oil wells and water wells are subjected to long-term exploitation and water injection, and most wells are easy to cause near-wellbore zone stratum pollution and blockage due to various reasons, so that the production problems of reduced stratum permeability, reduced oil well yield, reduced injection amount of a water injection well, increased water injection pressure and the like are caused. In order to solve the production problem, the blocked stratum must be unblocked, and the existing unblocking methods are many and can be divided into a physical method, a chemical method and a composite method in terms of unblocking mechanism. Chemical methods such as acidification, solvent unblocking, etc.; physical methods such as acoustic wave and high-pressure gas blockage removal and the like have good effects when applied on site, but different technologies have some limitations. The general investment of acidification, acid fracturing and the like is large, and secondary pollution of the stratum is easily caused; large scale fracturing is generally used in wells with great potential due to the complex engineering and high cost. Therefore, the physical blockage removing method with less investment and simple and convenient construction is widely applied, such as a hydraulic impact blockage removing method, a single jet flow blockage removing method, a single gas mixed discharging method and the like. The method has various advantages but has the need of improvement, such as hydraulic impact deblocking and single jet flow deblocking, which can only be effective in a limited range near the well, can not produce negative pressure suction effect on stratum outside the well barrel, and is difficult to discharge oil layer blockage with lower stratum pressure into the well. The reverse discharge of the high-pressure gas is difficult to remove the plug with higher plugging strength inside and outside the perforation gun hole and the sand-proof screen pipe.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the problems of the prior art that the general investment of acidification, acid fracturing and the like is large, and secondary pollution to stratum is easily caused; large scale fracturing is generally used in wells with great potential because of the complex engineering and high cost. Therefore, the physical blockage removal method with low investment and simple and convenient construction is widely applied, such as a hydraulic impact blockage removal method, a single jet blockage removal method, a single gas mixed discharge method and the like. The method has the advantages that the hydraulic impact deblocking and the single jet flow deblocking are only effective in a limited range near a well, can not generate a negative pressure suction effect on stratum outside a well barrel, and is difficult to discharge oil layer blocking objects with lower stratum pressure into the well, but also has the improvement. The throwing type double-jet flow underground blockage removing device is provided for solving the problem that high-pressure gas injection and reverse discharge are frequently used, and blockage objects with high blockage strength inside and outside a perforation gun hole and a sand control screen pipe are difficult to remove.

In order to achieve the above purpose, the utility model adopts the following technical scheme: the utility model provides a formula of can throwing double jet flows in pit separates stifled device, includes the sleeve pipe, the sheathed tube inboard is provided with oil pipe, oil pipe's bottom is connected with the suction ejector, the bottom of suction ejector is connected with slips formula packer, slips formula packer's bottom is connected with the sand retaining leather cup, the bottom of sand retaining leather cup is connected with washes ejector one, the bottom of washing ejector one is connected with interior center tube, the bottom of interior center tube is connected with washes ejector two, the bottom of washing ejector two is connected with the bottom ball seat.

Preferably, the inner side of the flushing ejector I is provided with a check valve, the side surface of the flushing ejector I is uniformly provided with nozzles, positive circulation flushing is carried out, the check valve at the bottom is closed, high-pressure water flows through an axial flow channel and is ejected at a high speed through the nozzles (the arrangement direction of the nozzles can be radial and can form a certain angle with the radius direction, namely ejected jet liquid can rotate circumferentially or not rotate, the nozzles can be pulse type or assembled cavitation type), cleaning of the stratum and the perforation blastholes in the near-wellbore area is realized, nearby pollutants are stirred, eroded, sheared and crushed, and the flushed sewage-containing liquid circulates to the ground through oil and casing annuluses.

Preferably, an annular axial flow passage is arranged on the inner side of the first flushing ejector, a second inner central pipe is arranged on the inner side of the first flushing ejector, reverse circulation flushing is performed, high-pressure power liquid injected by a wellhead pump truck enters the annular axial flow passage of the first flushing ejector along the annulus of the oil pipe and the casing pipe and is sprayed out at high speed through a nozzle, the stratum and a perforation blast hole in a region close to a well are cleaned, nearby pollutants are stirred, eroded, sheared and crushed, and the flushed dirt-containing liquid pushes a check valve at the bottom open and circulates to the ground through the second inner central pipe.

Preferably, a shell is arranged on the outer side of the suction ejector, a sliding sleeve is arranged on the inner side of the shell, a low-pressure region is arranged on the inner side of the suction ejector, a liquid flow discharge channel is arranged on the inner side of the suction ejector, the packer is set, then the sliding sleeve is pushed to the lower limit position by the ball and bit of the wellhead, then a core is put into the shell from the wellhead, water is pumped and circulated, the core reaches the preset position of the shell, the pressure is automatically increased to start suction and drainage, and the blockage is taken out of the stratum along with the pumped liquid flow and is lifted to the ground.

Preferably, the inboard of suction ejector is provided with nozzle in the core, the inboard of suction ejector is provided with the runner, the side of casing is provided with mixed liquid exhaust passage, mixed liquid exhaust passage is controlled by the sliding sleeve, is in the closed condition when the efflux is washed, is in the open condition during the efflux flowing back, and the high-pressure power liquid that ground was squeezed into reachs nozzle department in the core down through oil pipe, forms high-speed efflux.

Preferably, the bottom of the suction jet device is provided with a check valve II, the inner side of the suction jet device is provided with a liquid flow suction channel, and the formation liquid flows through the flow channel to open the check valve II and enters a low-pressure area through the liquid flow suction channel to be mixed with the power liquid for energy exchange.

Compared with the prior art, the utility model has the advantages and positive effects that,

the utility model discloses in, can realize washing the stratum perforation porthole high pressure in the well through a tubular column, harder plug is eroded, is broken into pieces, returns out along with the circulation liquid, realizes jet flow in advance through a tubular column simultaneously and removes near well jam, carries out upper portion high pressure jet suction then, makes the residual plug in near well and far well area carry the discharge stratum by the liquid stream to make the unblock scope enlarge, the function is strengthened, furthest resumes stratum seepage flow ability. The process has the advantages of simple and convenient construction, easy operation, lower cost, large stratum treatment range, obvious effect and the like, and can obtain remarkable economic and social benefits.

Drawings

FIG. 1 is a schematic structural view of a throwable dual-jet downhole unblocking apparatus according to the present invention;

FIG. 2 is a schematic structural view of a throwable dual-jet downhole unblocking apparatus of the present invention;

fig. 3 is a schematic diagram of a positive circulation flushing structure of a throwable dual-jet downhole unblocking apparatus provided by the present invention;

FIG. 4 is a schematic view of a reverse circulation flushing structure of a throwable dual-jet downhole unblocking apparatus of the present invention;

FIG. 5 is a schematic view of the structure of an input core of a throwing type dual-jet downhole unblocking apparatus provided by the present invention;

FIG. 6 is a schematic view of a casing structure of a throwable dual-jet downhole unblocking apparatus of the present invention;

fig. 7 is the utility model provides a but throw formula double jet and separate stifled device in pit's efflux flowing back state schematic diagram.

Illustration of the drawings: 1. a sleeve; 2. an oil pipe; 3. a suction jet device; 4. a slip packer; 5. a sand blocking leather cup; 6. flushing the jet device I; 7. an inner center tube; 8. flushing a jet device II; 9. a bottom ball seat; 10. a check valve; 11. a nozzle; 12. an annular axial flow passage; 13. a second inner central tube; 14. a sliding sleeve; 15. a housing; 16. a nozzle in the core; 17. a flow channel; 18. a second check valve; 19. a fluid suction channel; 20. a low-pressure region; 21. a liquid stream discharge channel; 22. and a mixed liquid discharge channel.

Detailed Description

In order to make the above objects, features and advantages of the present invention more clearly understood, the present invention will be further described with reference to the accompanying drawings and examples. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the present invention is not limited to the limitations of the specific embodiments of the present disclosure.

Referring to fig. 1-7, the present invention provides a technical solution: the utility model provides a can throw formula double jet and separate stifled device in pit, including sleeve pipe 1, sleeve pipe 1's inboard is provided with oil pipe 2, oil pipe 2's bottom is connected with suction ejector 3, suction ejector 3's bottom is connected with slip formula packer 4, slip formula packer 4's bottom is connected with sand blocking leather cup 5, sand blocking leather cup 5's bottom is connected with washes ejector 6, the bottom that washes ejector 6 is connected with interior center tube 7, the bottom of interior center tube 7 is connected with washes ejector two 8, the bottom that washes ejector two 8 is connected with bottom ball seat 9.

As shown in fig. 3, a check valve 10 is arranged on the inner side of a flushing ejector 6, nozzles 11 are uniformly arranged on the side surface of the flushing ejector 6, positive circulation flushing is performed, the check valve 10 at the bottom is closed, high-pressure water flows through an axial flow channel, the arrangement direction of the nozzles which are ejected at high speed through the nozzles 11 can be radial, and can form a certain angle with the radius direction, namely ejected jet liquid can rotate circumferentially or not rotate, the nozzles can be pulse type or assembled cavitation type, so that the cleaning of the stratum and the perforation blasthole in the near-wellbore area is realized, nearby pollutants are stirred, eroded and crushed, and the flushed sewage-containing liquid is circulated to the ground through oil and casing annulus.

As shown in figure 4, an annular axial flow passage 12 is arranged on the inner side of a flushing ejector 6, an inner central pipe 13 is arranged on the inner side of the flushing ejector 6, reverse circulation flushing is carried out, high-pressure power liquid injected by a wellhead pump enters the annular axial flow passage 12 of the flushing ejector along the annular space of oil and a sleeve, the high-pressure power liquid is sprayed out at a high speed through a nozzle 11 to clean the stratum and a perforation blasthole close to a well zone, nearby pollutants are stirred, eroded, sheared and crushed, and the flushed sewage-containing liquid pushes a bottom check valve 10 to circulate to the ground through the inner central pipe 13.

As shown in fig. 6 and 7, a casing 15 is arranged on the outer side of the suction jet device 3, a sliding sleeve 14 is arranged on the inner side of the casing 15, a low-pressure region 20 is arranged on the inner side of the suction jet device 3, a liquid flow discharge channel 21 is arranged on the inner side of the suction jet device 3, a packer is set, then a wellhead is thrown and pressed to push the sliding sleeve 14 to the lower limit position, then a core is thrown from the wellhead, water is pumped, the core reaches the preset position of the casing 15, the pressure is automatically increased to start suction and drainage, and the blockage is taken out of the stratum along with pumped liquid flow and is lifted to the ground.

As shown in fig. 6 and 7, the inner side of the suction jet device 3 is provided with an in-core nozzle 16, the inner side of the suction jet device 3 is provided with a flow channel 17, the side surface of the casing 15 is provided with a mixed liquid discharge channel 22, the mixed liquid discharge channel 22 is controlled by the sliding sleeve 14, the mixed liquid discharge channel is in a closed state during jet flushing, the mixed liquid discharge channel is in an open state during jet discharging, and high-pressure power liquid driven into the ground flows downwards to the in-core nozzle 16 through an oil pipe to form high-speed jet.

As shown in fig. 7, the bottom of the suction jet device 3 is provided with a second check valve 18, the inner side of the suction jet device 3 is provided with a fluid suction channel 19, and the formation fluid pushes the second check valve 18 open through a flow channel 17 and enters a low pressure area 20 through the fluid suction channel 19 to be mixed with the power fluid for energy exchange.

The use method and the working principle of the device are as follows: positive circulation flushing, wherein the bottom check valve 10 is closed at the moment, high-pressure water flows through the axial flow channel, the high-pressure water flows are ejected out of the nozzle 11 at a high speed, the arrangement direction of the nozzle can be radial and form a certain angle with the radius direction, namely, the ejected jet liquid can rotate in the circumferential direction or not, the nozzle can be in a pulse type or in a cavitation type, the cleaning of the stratum and the perforation blastholes in the near-wellbore area is realized, the nearby pollutants are stirred, eroded and crushed, and the flushed liquid containing the pollutants is circulated to the ground through oil and a casing annulus; reverse circulation flushing, wherein high-pressure power liquid injected by a wellhead pump truck enters a flushing ejector annular axial flow passage 12 along oil and sleeve annulus and is sprayed out at high speed through a nozzle 11 to clean the stratum and the perforation blasthole close to the well zone, nearby pollutants are stirred, eroded, sheared and crushed, and the flushed sewage-containing liquid pushes a bottom check valve 10 open and circulates to the ground through an inner central tube II 13; the packer is sealed, then the well mouth is thrown, the sliding sleeve 14 is pushed to the lower limit position by pressing, then the core is thrown from the well mouth, the pump truck water circulation is carried out, the core reaches the preset position of the shell 15, the pressure automatically rises to start pumping and draining, the plug is taken out of the stratum along with pumped liquid flow and is lifted to the ground, high-pressure power liquid pumped in from the ground flows downwards to the nozzle 16 in the core through the oil pipe to form high-speed jet flow, and the stratum liquid pushes the check valve II 18 open through the flow passage 17 to enter the low-pressure area 20 through the liquid flow suction passage 19 to be mixed with the power liquid for energy exchange.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in other forms, and any person skilled in the art may use the above-mentioned technical contents to change or modify the equivalent embodiment into equivalent changes and apply to other fields, but any simple modification, equivalent change and modification made to the above embodiments according to the technical matters of the present invention will still fall within the protection scope of the technical solution of the present invention.

Claims

1. A throwable double-jet downhole blockage removal device comprises a casing (1) and is characterized in that: the inboard of sleeve pipe (1) is provided with oil pipe (2), the bottom of oil pipe (2) is connected with suction jet ware (3), the bottom of suction jet ware (3) is connected with slips formula packer (4), the bottom of slips formula packer (4) is connected with sand blocking leather cup (5), the bottom of sand blocking leather cup (5) is connected with washes jet ware (6), the bottom of washing jet ware (6) is connected with inner center tube (7), the bottom of inner center tube (7) is connected with washes jet ware two (8), the bottom of washing jet ware two (8) is connected with bottom ball seat (9).

2. The throwable, dual-jet downhole unplugging device of claim 1, wherein: and a check valve (10) is arranged on the inner side of the first flushing ejector (6), and nozzles (11) are uniformly formed in the side surface of the first flushing ejector (6).

3. The throwable, dual-jet downhole unplugging device of claim 1, wherein: an annular axial flow channel (12) is arranged on the inner side of the first flushing ejector (6), and an inner central tube II (13) is arranged on the inner side of the first flushing ejector (6).

4. The jettable dual jet downhole unplugging device of claim 1, wherein: the outside of suction ejector (3) is provided with casing (15), the inboard of casing (15) is provided with sliding sleeve (14), the inboard of suction ejector (3) is provided with low-pressure zone (20), the inboard of suction ejector (3) is provided with liquid stream escape way (21), liquid stream suction channel (19).

5. The throwable, dual-jet downhole unplugging device of claim 4, wherein: the inboard of suction ejector (3) is provided with nozzle in the core (16), the inboard of suction ejector (3) is provided with runner (17), the side of casing (15) is provided with mixed liquid escape way (22), mixed liquid escape way (22) are controlled by sliding sleeve (14), are in closed condition during jet flushing, are in open condition during jet flowing liquid drainage.

6. The jettable dual jet downhole unplugging device of claim 1, wherein: and a check valve II (18) is arranged at the bottom of the suction jet device (3), and a liquid flow suction channel (19) is arranged on the inner side of the suction jet device (3).