CN-121738532-B - Oil-water gas well reservoir expansion sealing jet flow liquid production sand discharge device

Abstract

The invention discloses an oil-water gas well reservoir expansion sealing jet flow liquid production sand discharge device, and relates to the technical field of oil production. The expansion sealing jet flow liquid production sand discharge device for the oil-water gas well reservoir comprises a central pipe, an expansion assembly, a jet flow nozzle and a jet flow nozzle, wherein the expansion assembly is positioned on the periphery of the central pipe, the lower end of the expansion assembly is positioned on the central pipe, the upper end of the expansion assembly can slide on the central pipe and is used for radial expansion under the drive of power liquid, the jet flow nozzle is positioned below the central pipe and is positioned below the expansion assembly and is used for injecting the power liquid, a negative pressure area is generated in an injection area so as to absorb stratum liquid, the expansion sealing jet flow liquid production sand discharge device for the oil-water gas well reservoir is integrally designed, the expansion assembly and the jet flow nozzle are integrated, the two functions of oil seal sleeve annulus and jet flow liquid production sand discharge can be completed after one-time well descending, the complicated process of twice well descending in the traditional technology is avoided, and the operation time is shortened.

Inventors

• LI YANMING
• LU JIANLONG
• LU MING
• ZHAO JIE
• LI HONGZUO
• LU LIANQING
• WANG DONGYING
• SONG XIAOFEI
• LI LIANXIN
• HOU HUIGUANG
• LUO XIANCHAO

Assignees

• 东营市创世石油测试新技术开发有限责任公司

Dates

Publication Date

20260505

Application Date

20260302

Claims (8)

1. 1. The utility model provides an oil-water gas well reservoir expansion sealing jet flow adopts liquid sand discharging device, includes center tube (2), its characterized in that still includes: The expansion assembly is positioned at the periphery of the central tube (2), the lower end of the expansion assembly is positioned on the central tube (2), the upper end of the expansion assembly can slide on the central tube (2), the expansion assembly comprises an expansion rubber tube (1), a pressure transmission nipple (3) is fixedly arranged at the lower end of the expansion rubber tube (1), a pressure transmission hole (31) is axially formed in the pressure transmission nipple (3), a sliding joint (5) is fixedly arranged at the upper end of the expansion rubber tube (1), a limit screw sleeve (6) is fixedly arranged at the upper end of the sliding joint (5), and the sliding joint (5) and the limit screw sleeve (6) can generate displacement along the axial direction of the central tube (2); The jet nozzle (8), the jet nozzle (8) is located below the central tube (2) and below the expansion assembly, the jet nozzle (8) is used for jetting power fluid, and the jet area generates a negative pressure area to absorb stratum fluid; the split assembly comprises an inner pipe penetrating through the central pipe (2) and split joints arranged at the upper end and the lower end of the central pipe (2), two paths of channels for communicating the jet nozzle (8) and the expansion assembly are arranged in the lower split joint, the power fluid reaches the lower split joint after passing through the annular channel I (16) between the inner tube and the central tube (2) and is split into the jet nozzle (8) and the expansion assembly; the upper and lower end branch connectors are respectively a liquid discharge high-low pressure branch connector (7) and a liquid separation high-low pressure branch connector (4); the interlayer of the liquid discharging high-low pressure split joint (7) is provided with a first power liquid channel (71) along the axial direction and a liquid discharging port (72) along the radial direction, the first power liquid channel (71) is used for introducing power liquid into the first annular channel (16), and the liquid discharging port (72) is used for introducing mixed liquid into an oil sleeve annulus; The liquid separating high-low pressure split joint (4) is positioned at the lower end of the central tube (2), a power liquid jet channel (42) and a power liquid expansion channel I (41) are axially arranged in the central tube, and the power liquid jet channel (42) is used for supplying power liquid to the jet nozzle (8); The stratum liquid absorbed by the negative pressure area is mixed with the jet liquid in the inner pipe and enters the oil sleeve annulus upwards.
2. 2. The oil-water-gas well reservoir expansion sealing jet fluid production sand removal device of claim 1, further comprising an anti-settling assembly, the anti-settling assembly comprising: the carrying cylinder (13) is positioned above the central tube (2); the area near the upper end of the screen plate (14) is rotatably arranged at the periphery of the carrying cylinder (13), the upper end of the screen plate (14) is connected with the upper end of the expansion assembly through a steel rope (15), and the steel rope (15) is also connected with an elastic element (151) in series.
3. 3. The oil-water-gas well reservoir expansion seal jet fluid production sand removal device according to claim 1, wherein the inner tube comprises: A diffusion nipple (9) is internally provided with a chamber with a narrow lower end and a gradually expanding upper end; And the extension pipe (10) is connected to the upper end of the diffusion nipple (9) and extends into the central pipe (2).
4. 4. The expansion sealing jet flow sand extraction device for the oil-water-gas well reservoir according to claim 3, wherein the jet flow nozzle (8) is located at the lower end of the diffusion nipple (9), an assembly cylinder (81) is arranged above the jet flow nozzle (8), and a stratum liquid inlet hole II (82) is formed in one side of the assembly cylinder (81) and used for communicating stratum liquid with a negative pressure area.
5. 5. The expansion seal jet fluid production and sand removal device for the oil-water-gas well reservoir according to claim 4, wherein the fluid separation high-low pressure split joint (4) is provided with a stratum fluid inlet hole I (43) along the radial direction, and the stratum fluid inlet hole I (43) is opposite to a stratum fluid inlet hole II (82) and is used for communicating stratum fluid.
6. 6. The expansion seal jet fluid production and sand removal device for the oil-water-gas well reservoir according to claim 5, wherein a lower joint (12) is arranged on the periphery of the fluid-dividing high-low pressure diverting joint (4), and a fluid inlet annulus (19) is formed between the lower joint (12) and the fluid-dividing high-low pressure diverting joint (4) and is used for allowing stratum fluid to enter a stratum fluid inlet hole I (43).
7. 7. An oil-water-gas well reservoir expansion sealing jet fluid production sand-discharging device according to any one of claims 5-6, characterized in that the lower end of the fluid-dividing high-low pressure split joint (4) is provided with a plug (11) for sealing the lower end of the power fluid jet channel (42).
8. 8. The expansion sealing jet fluid production and sand removal device for the oil-water-gas well reservoir according to claim 7, wherein the expansion rubber cylinder (1) is a cylinder.

Description

Oil-water gas well reservoir expansion sealing jet flow liquid production sand discharge device Technical Field The invention relates to the technical field of oil extraction, in particular to an oil-water gas well reservoir expansion sealing jet flow liquid extraction and sand discharge device. Background In the development process of the oil field, the recovery ratio is continuously improved, the economic benefit of an oil-water well is improved, and the method is an inherent requirement for the development of the oil field. Under different terrains and geology conditions, development schemes of complex structures such as inclined wells, horizontal branch wells, fishbone-shaped horizontal wells, sidetracking wells and sidetracking horizontal wells are increasingly utilized, sand-yielding reservoirs, heavy oil reservoirs and high-freezing reservoirs with poor stratum physical properties and crude oil physical properties are developed on a large scale successively, and casing deformation and damaged wells caused by long-term development of old oil fields are also increasingly utilized. The technology of sand removal and blockage removal and permeability improvement of the reservoir is also improved. Coalbed methane is a part of national energy strategy, and coal bed gas wells of coal fields are developed by adopting inclined wells, L-shaped horizontal wells, horizontal branch wells and U-shaped well schemes at present, and sand and coal dust can be produced in a shaft in the production process, so that the periphery of the shaft is blocked. The conventional liquid extraction technologies such as a rod pump and an electric submersible pump have the problems that the underground equipment has sliding and rotating motions, the reservoir layer has a large sand outlet amount, the underground equipment pipe rod is worn in the production process, the sand clamp is frequently broken, the service life of the equipment is influenced, and the pump detection period is short. The adoption jet pump better avoids above-mentioned problem, but conventional jet pump does not have moving parts, but seals and separates with the efflux function, need to descend packer packing oil jacket annular space earlier, and then go into the jet pump, and the operation flow is complicated (need 2 to go into the well), and power fluid is used for either driving the packer to expand, or is used for the efflux to produce the negative pressure, does not realize effective reposition of redundant personnel of energy. In addition, after the packer is sealed, sand grains in the mixed solution are easy to settle on the outer surface of the packer, so that the sealing element is worn and the sealing is invalid, and the packer needs to be replaced frequently. Disclosure of Invention Aiming at the defects of the prior art, the invention provides an oil-water gas well reservoir expansion sealing jet flow liquid production sand discharge device, which solves the problem that effective energy distribution is not realized. The expansion sealing jet flow liquid collecting and sand discharging device for the oil-water gas well reservoir comprises a central pipe and further comprises an expansion assembly, wherein the expansion assembly is located on the periphery of the central pipe, the lower end of the expansion assembly is located on the central pipe, the upper end of the expansion assembly can slide on the central pipe and is used for being driven by power liquid to radially expand, a jet flow nozzle is located below the central pipe and located below the expansion assembly and is used for jetting the power liquid, a negative pressure area is formed in a jet area to absorb stratum liquid, the diversion assembly comprises an inner pipe penetrating through the inside of the central pipe and a diversion joint arranged at the upper end and the lower end of the central pipe, two paths of channels for communicating the jet flow nozzle and the expansion assembly are formed in the diversion joint below, the power liquid reaches the diversion joint below after passing through an annular channel I between the inner pipe and the central pipe and is shunted into the jet flow nozzle and the expansion assembly, and the stratum liquid absorbed by the negative pressure area is mixed in the inner pipe and enters an oil sleeve annulus upwards. Further, still include prevent subsiding the subassembly, prevent subsiding the subassembly and include: the carrying cylinder is positioned above the central tube; The screen plate is rotatably arranged at the periphery of the carrying cylinder in a region near the upper end, the upper end of the screen plate is connected with the upper end of the expansion assembly through a steel rope, and an elastic element is connected in series on the steel rope. Further, the inner tube includes: a diffusion nipple, wherein a chamber with a narrow lower end and a gradually expanding upper end is formed inside the diffusion nipple; And the ext