CN211397556U

CN211397556U - Gas-proof device under deep well pump

Info

Publication number: CN211397556U
Application number: CN201921755120.7U
Authority: CN
Inventors: 刘辉; 倪兴; 潘志军
Original assignee: Songyuan Jiyou Petroleum Engineering Technology Service Co ltd
Current assignee: Songyuan Jiyou Petroleum Engineering Technology Service Co ltd
Priority date: 2019-10-18
Filing date: 2019-10-18
Publication date: 2020-09-01
Anticipated expiration: 2029-10-18

Abstract

The utility model discloses a gas-tight device under deep-well pump, include: the utility model discloses a well pump bottom valve is connected with buffering sand prevention pipe, oil pipe nipple joint, inside and outside double-deck gas tight device include the little oil pipe of inside lining and buffering sand prevention pipe, external big floral tube, is equipped with sand control feed liquor hole on the external big floral tube, and oil pipe nipple joint is inside to hang through a sealed fixing device seal with built-in sand prevention pipe and hang and be connected, oil pipe nipple joint outside is connected with deep-well pump bottom valve through the screw thread, and oil pipe nipple joint lower part is passed through the oil pipe coupling and is cushioned sand prevention union coupling, the little oil pipe of inside lining hangs sealed fixing device through No. two with buffering sand prevention pipe and hangs sealing connection, buffering sand prevention pipe lower part threaded connection has the plug, has: the gas-tight production problem of the oil well in the high-point gas cap area, the production problem of the oil well after a thermal recovery well and a steam area, the production problem of the oil well with high oil-gas ratio, the production problem of recycling of casing gas, and the production problem of the control casing gas oil well in urban areas and residential areas.

Description

Gas-proof device under deep well pump

Technical Field

The utility model relates to a deep-well pump technical field especially relates to anti-gas device under deep-well pump.

Background

At present, the like products in the market have a plurality of types, but the like mainly comprises a common gravity gas anchor, a spiral gas anchor and the like, and the main technical characteristics of the common gravity gas anchor, the spiral gas anchor and the like are that the working principle of oil-gas-water gravity difference is applied. But they have the common disadvantages: firstly, the air release path is short, and the air prevention effect is not ideal; secondly, the cost is high, and the method is not suitable for large-area application; and thirdly, the slag prevention function is not provided.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the main technical problem who solves provides a gas-tight device under deep-well pump, can solve the problem in the background art, including the gas-tight production problem of high point gas cap district oil well, thermal recovery well and vapour district back oil well production problem, the oil well production problem of high oil-gas ratio, the production problem of cover gas recovery recycle, urban area, residential area control cover gas oil well

In order to solve the technical problem, the utility model discloses a technical scheme be: provided is a gas-tight device under a deep well pump, comprising: plug 10, built-in slag-proof pipe 4, oil pipe nipple joint 3, inside and outside double-deck gas-tight device includes inside lining small oil pipe 9 and buffering sand-proof pipe 8, external big floral tube 7, be equipped with sand control feed liquor hole on the external big floral tube 7, 3 inside and built-in slag-proof pipes 4 of oil pipe nipple joint hang through a sealed fixing device 2 sealed suspension connection, 3 outsides of oil pipe nipple joint are connected with deep-well pump bottom valve 1 through the screw thread, 3 lower parts of oil pipe nipple joint are passed through oil pipe coupling 5 and are connected with buffering sand-proof pipe 8, inside lining small oil pipe 9 hangs sealed connection through No. two sealed fixing device 6 with buffering sand-

proof pipe

8, 8 lower part threaded connection of buffering sand-proof pipe has plug 10.

Preferably, the inner diameter of the built-in slag-proof pipe 4 is smaller than that of the oil pipe nipple 3.

Preferably, the built-in slag-proof pipe 4 can be a perforated pipe.

Preferably, the bearing capacity of the plug 10 is 2 MPa.

Preferably, the tubing nipple 3 is connected with the buffering sand control pipe 8 by a tubing coupling 5.

The utility model has the advantages that:

(1) the gas-proof liquid inlet path is long, oil and gas can be fully separated, and the separation effect is good.

(2) The air-proof passage can be lengthened and shortened without limit, and can be adjusted without limit at any time.

(3) The addition of the primary slag prevention system has good slag prevention and sedimentation functions.

(4) The self-made is simple and convenient to use, convenient operation.

(5) Low cost and suitability for large-area popularization and application.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

The parts in the drawings are numbered as follows: 1. a bottom valve; 2. a first suspension sealing and fixing device; 3. An oil pipe nipple; 4. a slag-proof pipe is arranged inside; 5. a tubing coupling; 6. a second suspension sealing and fixing device; 7. a large flower tube is arranged outside; 8. a buffering sand control pipe; 9. lining a small oil pipe; 10. and (5) plugging with a thread.

Detailed Description

The following detailed description of the preferred embodiments of the present invention will be provided in conjunction with the accompanying drawings, so as to enable those skilled in the art to more easily understand the advantages and features of the present invention, and thereby define the scope of the invention more clearly and clearly.

Referring to fig. 1, an embodiment of the present invention includes:

an under-pump gas-tight apparatus for a deep well pump, comprising: the anti-gas pipeline comprises a plug 10, an internal anti-slag pipe 4, an oil pipe short section 3, an internal and external double-layer gas-proof device and an external large perforated pipe 7, wherein the internal and external double-layer gas-proof device comprises a lining small oil pipe 9 and a large-size sediment oil pipe 8, the internal and external double-layer gas-proof channel structure is mainly a gas-proof main body forming part, the lining small oil pipe is connected with a buffer sand-proof pipe 8 in a hanging and sealing mode through a hanging and sealing fixing device 6 in a hanging and sealing mode, the buffer sand-proof pipe 8 is 73mm in outer diameter and 30m in length, and a conventional oil well production oil pipe column is; the inner part of the oil pipe nipple 3 is connected with the built-in slag-proof pipe 4 in a sealing and hanging way through the hanging and sealing fixing device 2, the upper part of the oil pipe nipple is connected with a valve 1 at the bottom of the deep well pump through a screw thread, the lower part of the oil pipe nipple is connected with the external large perforated pipe 7 through an oil pipe coupling, the lower part of the internal and external double-layer gas-proof channel is in threaded connection with a plug 10, the plug 10 is in plug 10 gauge low pressure, the plug can bear 2MPa, the bottom of the internal and external double; the external diameter of the built-in slag preventing pipe 6 is 32mm, the length of the built-in slag preventing pipe is 600mm, the built-in slag preventing pipe is connected with the built-in sealing suspension of the external oil pipe nipple 5, the built-in slag preventing pipe 4 is a small perforated pipe, the aperture is 3mm, the hole interval is 3mm, and the effective length of the hole part is 500 mm; a 4-layer structure of 40-mesh copper wire cloth is wound outside the eyelet part, and the oil pipe nipple 3 has the outer diameter of 73mm and the length of 1000 mm; the external large perforated pipe 7 is provided with a sand-proof liquid inlet hole 7, the outer diameter is 73mm, and the length is 1500 mm; the aperture of the perforated pipe is 5mm, the hole interval is 8mm, and the effective length of the hole part is 1200 mm. Whether the copper wire cloth is wound for protection is additionally arranged according to the requirement, if the copper wire cloth is additionally arranged according to the requirement, a 60-mesh copper wire cloth 4-layer structure is wound outside the eyelet part, and a large external perforated pipe 7 and a small lining oil pipe 9 form an air-tight oil inlet channel.

The utility model discloses a use method:

gaseous flow direction is upflow, the flow direction of liquid is downflow, fluid when the oil gas layer gets into behind the pit shaft, flow upward along the pit shaft, when the flow through get into external big floral tube, because the effect of the gravity of water, at first produce the separation of oil gas, most gas is along the annular space rebound of oil jacket, a small amount of gas gets into the annular space of inside and outside double-deck gas defense device, flow the in-process in the annular space, because the route of flowing through is longer, produce the secondary separation in the annular space, gas is along the annular space upflow of double-deck gas defense pipe, spill over and get into the annular space of oil jacket, continue upflow and accomplish the separation. Most of the gas is separated out through the secondary separation effect, so that the good gas-proof effect is achieved.

Adopt the utility model discloses a when the device operates:

(1) the method comprehensively solves the practical problems that the oil well cannot normally produce in a long way due to frequent air lock, the operation period is short and the like when seven, nine and eleven hot-drive and hot-throughput oil extraction operations of the residual oil production plant are carried out. Through 50 well tests and application, the effect is remarkable, the problem of frequent air lock in the prior art is solved, the maintenance-free period of the oil well exceeds 450 days, and is prolonged by about 170 days compared with about 280 days in the prior art.

(2) The problem of burning the pumps by air lock and screw pump dry pumping of part of oil production wells in urban areas, residential areas and high-point gas cap areas is solved, the problem of burning the pumps by dry pumping of the screw pump is particularly outstanding, the number of the pumps by dry pumping of the screw pump is reduced by about 30 pumps every year, and the economic loss is avoided by 9 ten thousand yuan.

(3) The method has the advantages that the method has high gas content for more than 10 wells, and meanwhile, the well barrel is easy to produce sand, so that the experiment and application are carried out, a very good experiment effect is obtained, and an obvious effect is achieved. The application prospect is good.

The above only is the embodiment of the present invention, not limiting the patent scope of the present invention, all the equivalent structures or equivalent processes that are used in the specification and the attached drawings or directly or indirectly applied to other related technical fields are included in the patent protection scope of the present invention.

Claims

1. The utility model provides a gas-tight device under deep-well pump which characterized in that includes: a pipe plug (10), a built-in slag-proof pipe (4), an oil pipe short section (3), an internal and external double-layer gas-proof device, the inner and outer double-layer gas-proof device comprises a lining small oil pipe (9), a buffering sand-proof pipe (8) and an external large perforated pipe (7), the external big perforated pipe (7) is provided with a sand-proof liquid inlet hole, the inside of the oil pipe nipple (3) is connected with the internal slag-proof pipe (4) in a sealing and hanging way through a first hanging and sealing fixing device (2), the outer part of the oil pipe nipple (3) is connected with a valve (1) at the bottom of the deep-well pump through a screw thread, the lower part of the oil pipe nipple (3) is connected with a buffering sand control pipe (8) through an oil pipe coupling (5), the lining small oil pipe (9) and the buffering sand prevention pipe (8) are connected in a hanging and sealing mode through a second hanging and sealing fixing device (6), and the lower portion of the buffering sand prevention pipe (8) is connected with a plug (10) in a threaded mode.

2. The deep-well pump down gas-tight apparatus of claim 1, wherein: the inner diameter of the built-in slag-proof pipe (4) is smaller than that of the oil pipe nipple (3).

3. The deep-well pump down gas-tight apparatus of claim 1, wherein: the built-in slag-proof pipe (4) is a perforated pipe.

4. The deep-well pump down gas-tight apparatus of claim 1, wherein: the bearing capacity of the plug (10) is 2 MPa.

5. The pump down gas-proof device of the deep well pump according to claim 1, characterized in that the tubing nipple (3) is connected with the buffering sand control pipe (8) by a tubing coupling (5).