Hydraulic oil drainage device

Abstract

The utility model relates to the technical field of oil extraction in oil fields, and particularly discloses a hydraulic type oil drainage device which comprises an upper connector, an outer pipe, a sliding sleeve, a pin, a sealing connector and a central pipe, the sealing connector is sleeved on the outer surface wall of the central pipe, the sliding sleeve is sleeved on the outer surface wall of the central pipe, and the upper connector is sleeved on the outer surface wall of the central pipe. The sliding sleeve is located between the upper connector and the sealing connector, the outer pipe is arranged on the outer surface walls of the sealing connector and the sliding sleeve in a sleeving mode, the upper connector is arranged at the end, away from the sealing connector, of the center pipe, one end of the pin penetrates through the sliding sleeve and is embedded in the outer surface wall of the center pipe, a first oil drainage hole is formed in the outer surface wall of the outer pipe, and a second oil drainage hole is formed in the outer surface wall of the center pipe. The principle of an existing oil pumping pipe column oil drainage technology is broken, the defect that the existing oil pumping pipe column oil drainage technology is poor in oil drainage application reliability in highly-deviated wells, horizontal wells and super-heavy oil and high-condensation-point oil wells is overcome, and clean construction of pump inspection operation is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to oilfield production technology field especially relates to a hydraulic oil drain. BACKGROUND

[0002] At present, oilfield production well pump inspection operation pumping string liquid leaks in the well, which is a necessary measure to strengthen oilfield environmental protection and improve the working environment of workers, and is one of the important links of clean production. The existing pumping string liquid operation oil drain technology mainly includes impact type oil drain and pull type oil drain.

[0003] However, in the prior art, the impact type oil drain and the pull type oil drain have unreliability in releasing the pumping string liquid operation for high deviation wells, horizontal wells and super heavy oil wells and high condensate oil wells, and are easy to pollute the ground well site. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a hydraulic oil drain, which aims to solve the technical problem that the impact type oil drain and the pull type oil drain in the prior art have unreliability in releasing the pumping string liquid operation for high deviation wells, horizontal wells and super heavy oil wells and high condensate oil wells, and are easy to pollute the ground well site.

[0005] To achieve the above-mentioned purpose, the utility model adopts a hydraulic oil drain, which comprises an upper joint, an outer pipe, a sliding sleeve, a pin, a sealing joint and a central pipe. The sealing joint is sleeved on the outer wall of the central pipe. The sliding sleeve is sleeved on the outer wall of the central pipe. The upper joint is sleeved on the outer wall of the central pipe. The sliding sleeve is located between the upper joint and the sealing joint. The outer pipe is sleeved on the outer walls of the sealing joint and the sliding sleeve. The upper joint is provided at the end of the central pipe away from the sealing joint, and the upper joint is embedded between the outer pipe and the central pipe. One end of the pin penetrates the sliding sleeve and is embedded in the outer wall of the central pipe. The outer wall of the outer pipe has a first oil drain hole. The outer wall of the central pipe has a second oil drain hole.

[0006] The upper joint has a plurality of first O-shaped sealing rings. The first O-shaped sealing rings are respectively sleeved on the outer wall of the upper joint and are respectively located between the upper joint and the outer pipe.

[0007] The sliding sleeve has a plurality of second O-shaped sealing rings and a plurality of third O-shaped sealing rings. The second O-shaped sealing rings are respectively sleeved on the outer wall of the sliding sleeve and are respectively located between the sliding sleeve and the outer pipe. The third O-shaped sealing rings are respectively embedded in the inner side of the sliding sleeve, and the third O-shaped sealing rings are respectively located between the central pipe and the sliding sleeve.

[0008] The sealing joint has a plurality of fourth O-shaped sealing rings and a plurality of fifth O-shaped sealing rings, the plurality of fourth O-shaped sealing rings are respectively sleeved on the outer wall of the sealing joint and are respectively located between the sealing joint and the outer pipe, and the plurality of fifth O-shaped sealing rings are respectively embedded on the inner side of the sealing joint and are respectively located between the sealing joint and the central pipe.

[0009] The water-type oil drain device has the advantages that the existing oil pumping pipe column oil draining technical principle is broken, the defects of poor reliability of the existing oil pumping pipe column oil draining technology in the application of oil draining of high-inclination wells, horizontal wells and super-thick oil and high-coagulation oil wells are avoided, and clean construction of pump inspection operation is realized. BRIEF DESCRIPTION OF DRAWINGS

[0010] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings required to be used in the following embodiment or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0011] Figure 1 is a structural schematic view of a water-type oil drain device of the present application.

[0012] 1-upper joint, 2-outer pipe, 3-sliding sleeve, 4-pin, 5-sealing joint, 6-central pipe, 7-first oil drain hole, 8-second oil drain hole, 9-first O-shaped sealing ring, 10-second O-shaped sealing ring, 11-third O-shaped sealing ring, 12-fourth O-shaped sealing ring, 13-fifth O-shaped sealing ring. DETAILED DESCRIPTION

[0013] Please refer to Figure 1 The utility model provides a kind of water-type oil drain device, including upper joint 1, outer pipe 2, sliding sleeve 3, pin 4, sealing joint 5 and central pipe 6, the sealing joint 5 is sleeved in the outer wall of the central pipe 6, the sliding sleeve 3 is sleeved in the outer wall of the central pipe 6, the upper joint 1 is sleeved in the outer wall of the central pipe 6, the sliding sleeve 3 is between the upper joint 1 and the sealing joint 5, the outer pipe 2 is sleeved in the outer wall of the sealing joint 5 and the sliding sleeve 3, the upper joint 1 is set with the central pipe 6 away from the one end of the sealing joint 5, and the upper joint 1 is embedded between the outer pipe 2 and the central pipe 6, the pin 4 one end is through the sliding sleeve 3 and is embedded in the outer wall of the central pipe 6, the outer wall of the outer pipe 2 has first oil drain hole 7, the outer wall of the central pipe 6 has second oil drain hole 8.

[0014] Further, the upper joint 1 has a plurality of first O-shaped sealing rings 9, which are respectively sleeved on the outer wall of the upper joint 1 and are respectively located between the upper joint 1 and the outer pipe 2.

[0015] Further, the sliding sleeve 3 has a plurality of second O-shaped sealing rings 10 and a plurality of third O-shaped sealing rings 11, the plurality of second O-shaped sealing rings 10 are respectively sleeved on the outer wall of the sliding sleeve 3 and are respectively located between the sliding sleeve 3 and the outer pipe 2, and the plurality of third O-shaped sealing rings 11 are respectively embedded on the inner side of the sliding sleeve 3 and are respectively located between the central pipe 6 and the sliding sleeve 3.

[0016] Further, the sealing joint 5 has a plurality of fourth O-shaped sealing rings 12 and a plurality of fifth O-shaped sealing rings 13, the plurality of fourth O-shaped sealing rings 12 are respectively sleeved on the outer wall of the sealing joint 5 and are respectively located between the sealing joint 5 and the outer pipe 2, and the plurality of fifth O-shaped sealing rings 13 are respectively embedded on the inner side of the sealing joint 5 and are respectively located between the sealing joint 5 and the central pipe 6.

[0017] In the embodiment, during the pump inspection operation, the sucker rod string is first pulled out, then water is injected into the tubing string to pressurize, when the pressure is higher than the shearing pressure of the pin 4, the pin 4 is cut off by the sliding sleeve 3 and the central pipe 6, the sliding sleeve 3 moves downward until the sliding sleeve 3 contacts the sealing joint 5, at this time, the first oil drain hole 7 and the second oil drain hole 8 are connected to realize the oil drain operation, the plurality of first O-shaped sealing rings 9, the plurality of second O-shaped sealing rings 10, the plurality of third O-shaped sealing rings 11, the plurality of fourth O-shaped sealing rings 12 and the plurality of fifth O-shaped sealing rings 13 are sealed to ensure that the liquid does not enter the sealed cavity, the plurality of first O-shaped sealing rings 9 seal the upper joint 1 and the outer pipe 2, the second O-shaped sealing rings 10 and the third O-shaped sealing rings 11 seal the outer pipe 2, the sliding sleeve 3 and the central pipe 6, and the fourth O-shaped sealing rings 12 and the fifth O-shaped sealing rings 13 seal the outer pipe 2, the sealing joint 5 and the central pipe 6, which breaks the existing tubing string oil drain technology principle and avoids the poor reliability of the existing tubing string oil drain technology in high-inclination wells, horizontal wells and super-heavy oil and high-coagulation oil wells, and realizes clean construction of the pump inspection operation.

[0018] The above only discloses a preferred embodiment of the utility model, of course, cannot limit the utility model right scope with this, the person skilled in the art can understand that all or part of the processes of the above-mentioned embodiment are implemented, and the equivalent changes made according to the utility model claim still belong to the range covered by the utility model.

Claims

1. A hydraulic oil drain device, characterized in that, comprising an upper joint, an outer tube, a sliding sleeve, a pin, a sealing joint and a central tube, the sealing joint is sleeved on the outer wall of the central tube, the sliding sleeve is sleeved on the outer wall of the central tube, the upper joint is sleeved on the outer wall of the central tube, the sliding sleeve is located between the upper joint and the sealing joint, the outer tube is sleeved on the outer wall of the sealing joint and the sliding sleeve, the upper joint is arranged away from the end of the central tube and the sealing joint, and the upper joint is embedded between the outer tube and the central tube, one end of the pin penetrates the sliding sleeve and is embedded in the outer wall of the central tube, the outer wall of the outer tube has a first oil drain hole, and the outer wall of the central tube has a second oil drain hole.

2. The hydraulic oil drain device of claim 1, characterized in that, the upper joint has a plurality of first O-rings, and the plurality of first O-rings are respectively sleeved on the outer wall of the upper joint and are respectively located between the upper joint and the outer tube.

3. The hydraulic oil drain device of claim 1, characterized in that, the sliding sleeve has a plurality of second O-rings and a plurality of third O-rings, the plurality of second O-rings are respectively sleeved on the outer wall of the sliding sleeve and are respectively located between the sliding sleeve and the outer tube, and the plurality of third O-rings are respectively embedded in the inner side of the sliding sleeve and are respectively located between the central tube and the sliding sleeve.

4. The hydraulic oil drain device of claim 1, characterized in that, the sealing joint has a plurality of fourth O-rings and a plurality of fifth O-rings, the plurality of fourth O-rings are respectively sleeved on the outer wall of the sealing joint and are respectively located between the sealing joint and the outer tube, and the plurality of fifth O-rings are respectively embedded in the inner side of the sealing joint and are respectively located between the sealing joint and the central tube.

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