A kind of oil leakage packer

Abstract

A separate measurement oil leakage packer, wherein an upper joint is installed at the upper end of a center tube, a lower joint is installed at the lower end of the center tube, an upper sleeve is sleeved on the outer periphery of the upper joint and the center tube, an unsealing shearing nail is arranged between the upper joint and the upper sleeve, an oil leakage hole is provided on the upper joint, the upper sleeve part is connected to a rubber tube seat tube, a side rubber tube and a plurality of middle rubber tubes are sleeved on the outer periphery of the rubber tube seat tube from top to bottom, a clamping tooth is sleeved on the lower part of the rubber tube seat tube, a threaded connection is adopted between the rubber tube seat tube and the clamping tooth, a rubber tube lower seat is installed at the lower part of the rubber tube seat tube, a clamping sleeve and a connecting sleeve are installed at the lower part of the rubber tube lower seat, a cone sleeve is installed at the center tube, a lower liquid cylinder is installed at the lower part of the connecting sleeve, and the lower liquid cylinder and the lower joint are positioned by the sealing shearing nail; a liquid outlet hole is provided at the position of the center tube at the lower liquid cylinder. The present invention provides an oil leakage hole on the upper joint, so that the present invention can discharge the oil in the pipe column while completing the separate measurement, thereby improving the use performance of the separate measurement packer.

Description

Technical Field

[0001] The invention relates to a packer used in the oil field production field, in particular to a separate oil leakage packer. Background Art

[0002] At present, after the test of the sub-test packer, the unsealing is generally done by lifting the tubing string to cut off the unsealing shear pins and then releasing the rubber cylinder to unseal, so that the oil in the tubing string cannot leak out. Summary of the invention

[0003] The purpose of the present invention is to solve the problems existing in the background technology and provide a separate oil leakage packer. When unsealing, the center tube is lifted up to cut off the unsealing shear nail, and then the oil leakage hole on the upper joint is opened to drain the oil. While draining the oil, the cone sleeve installed on the center tube retracts the teeth to make the teeth separate from the sleeve, so that the rubber tube rebounds and releases to unseal.

[0004] A separate oil leakage packer, comprising an upper joint, a sealing shear pin, a first O-ring, an upper sleeve, a second O-ring, a central tube, a rubber sleeve seat sleeve, a side rubber sleeve, a spacer, an intermediate rubber sleeve, a rubber sleeve lower seat, a third O-ring, a clamping tooth, a clamping sleeve, a taper sleeve, a connecting sleeve, a fourth O-ring, a fifth O-ring, a lower liquid cylinder, a sealing shear pin and a lower joint;

[0005] The upper joint is installed at the upper end of the center tube, and the lower joint is installed at the lower end of the center tube. The upper sleeve is sleeved on the outer periphery of the upper joint and the center tube. An unsealing shear nail is arranged between the upper joint and the upper sleeve. An oil drain hole is opened on the upper joint. The oil drain hole on the upper joint and the upper sleeve are sealed by a first O-ring. The upper joint and the center tube, and the upper sleeve and the center tube are sealed by a second O-ring. The upper sleeve is connected to the rubber tube seat tube.

[0006] A side rubber cylinder and several middle rubber cylinders are sleeved on the outer circumference of the rubber cylinder seat tube from top to bottom, and spacers are arranged between the side rubber cylinder and the middle rubber cylinder and between two adjacent middle rubber cylinders. A tooth is sleeved on the lower part of the rubber cylinder seat tube, and the rubber cylinder seat tube and the tooth are connected by thread. A rubber cylinder lower seat is installed at the lower part of the rubber cylinder seat tube, and the rubber cylinder seat tube and the rubber cylinder lower seat are sealed with a third O-ring. A ferrule and a connecting sleeve are installed at the lower part of the rubber cylinder lower seat, and a cone sleeve is installed at the center tube. The center tube and the cone sleeve are connected by thread, and the cone sleeve is located between the center tube and the ferrule; a lower liquid cylinder is installed at the lower part of the connecting sleeve, and the lower liquid cylinder and the center tube are sealed by a fourth O-ring, and the lower liquid cylinder and the lower joint are sealed by a fifth O-ring. A sealing shear pin is arranged between the lower liquid cylinder and the lower joint, and the lower liquid cylinder and the lower joint are positioned by the sealing shear pin; a liquid outlet is provided at the position of the center tube located at the lower liquid cylinder.

[0007] The working principle and process of the present invention are:

[0008] 1. Sealing: Apply pressure from the center tube, the sealing shear pins are cut off, and the oil flows out from the outlet hole at the bottom of the center tube, pushing the lower hydraulic cylinder upward, and at the same time pushing the connecting sleeve, ferrule, and rubber tube lower seat upward. During the upward movement of the ferrule, the inner teeth of the ferrule mesh with the outer teeth at the bottom of the teeth, and at the same time, the rubber tube lower seat compresses the side rubber tube and the middle rubber tube to expand outward to achieve sealing.

[0009] 2. Unsealing: When unsealing, lift the pipe column to cut off the unsealing shear pin. At this time, the oil drain hole on the upper joint opens, and the oil in the pipe column flows out from the oil drain hole. At the same time, as the center pipe goes up, the cone sleeve installed on the center pipe retracts the teeth at the bottom of the teeth and disengages them. The side rubber tube and the middle rubber tube rebound and release to achieve unsealing.

[0010] The beneficial effects of the present invention are:

[0011] The invention has an oil drain hole on the upper joint, so that the invention can drain the oil in the pipe column while completing the sub-test, thereby improving the use performance of the sub-test packer. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a cross-sectional view of an embodiment of the present invention;

[0013] Figure 2 is an upper sectional view of an embodiment of the present invention;

[0014] Figure 3 is a cross-sectional view of a lower section of an embodiment of the present invention;

[0015] Figure 4 yes Figure 3 A-A section view in. DETAILED DESCRIPTION

[0016] like Figures 1 to 4 As shown, a separate oil leakage packer comprises an upper joint 1, an unsealing shear pin 2, a first O-ring 3, an upper sleeve 4, a second O-ring 5, a central tube 6, a rubber tube seat sleeve 7, a side rubber tube 8, a spacer 9, an intermediate rubber tube 10, a rubber tube lower seat 11, a third O-ring 12, a locking tooth 13, a ferrule 14, a taper sleeve 15, a connecting sleeve 16, a fourth O-ring 17, a fifth O-ring 18, a lower liquid cylinder 19, a sealing shear pin 20 and a lower joint 21;

[0017] An upper joint 1 is installed at the upper end of the center tube 6, and a lower joint 21 is installed at the lower end of the center tube 6. An upper sleeve 4 is sleeved on the outer periphery of the upper joint 1 and the center tube 6. An unsealing shear nail 2 is arranged between the upper joint 1 and the upper sleeve 4. An oil drain hole 22 is opened on the upper joint 1. The oil drain hole 22 on the upper joint 1 and the upper sleeve 4 are sealed by a first O-ring 3. The upper joint 1 and the center tube 6, and the upper sleeve 4 and the center tube 6 are sealed by a second O-ring 5. The upper sleeve 4 is connected to the rubber tube seat tube 7. A side rubber tube 8 and a plurality of middle rubber tubes 10 are sleeved on the outer periphery of the rubber tube seat tube 7 from top to bottom. A spacer 9 is arranged between the side rubber tube 8 and the middle rubber tube 10 and between two adjacent middle rubber tubes 10. A tooth 13 is sleeved on the lower part of the rubber tube seat tube 7. The rubber tube seat tube 7 and the tooth 13 are connected by a threaded connection. A rubber cartridge lower seat 11 is installed at the lower part of the rubber cartridge seat tube 7, and the rubber cartridge seat tube 7 and the rubber cartridge lower seat 11 are sealed with a third O-ring 12, a ferrule 14 and a connecting sleeve 16 are installed at the lower part of the rubber cartridge lower seat 11, a tapered sleeve 15 is installed at the center tube 6, and the center tube 6 and the tapered sleeve 15 are threadedly connected, and the tapered sleeve 15 is located between the center tube 6 and the ferrule 14; a lower liquid cylinder 19 is installed at the lower part of the connecting sleeve 16, and the lower liquid cylinder 19 and the center tube 6 are sealed with a fourth O-ring 17, and the lower liquid cylinder 19 and the lower joint 21 are sealed with a fifth O-ring 18, and a sealing shear pin 20 is arranged between the lower liquid cylinder 19 and the lower joint 21, and the sealing shear pin 20 is used to position the lower liquid cylinder 19 and the lower joint 21; a liquid outlet 23 is provided at the position of the center tube 6 located at the lower liquid cylinder 19.

[0018] The working principle and process of this embodiment are:

[0019] 1. Sealing: Apply pressure from the center tube 6, the sealing shear pin 20 is cut off, and the oil flows out from the outlet hole 23 at the bottom of the center tube 6, pushing the lower cylinder 19 upward, and at the same time pushing the connecting sleeve 16, the ferrule 14, and the lower seat 11 of the rubber tube upward. During the upward movement of the ferrule 14, the inner teeth of the ferrule 14 mesh with the outer teeth at the bottom of the tooth 13, and at the same time, the lower seat 11 of the rubber tube compresses the side rubber tube 8 and the middle rubber tube 10 to expand outward to achieve sealing.

[0020] 2. Unsealing: When unsealing, lift the pipe column and cut off the unsealing shear pin 2. At this time, the oil drain hole 22 of the upper joint 1 opens, and the oil in the pipe column flows out from the oil drain hole 22. At the same time, as the center pipe 6 goes up, the cone sleeve 15 installed on the center pipe 6 retracts the teeth at the lower part of the teeth 13 to disengage, and the side rubber tube 8 and the middle rubber tube 10 rebound and release to achieve unsealing.

Claims

1. A separate oil leakage packer, characterized in that: It comprises an upper joint (1), an unsealing shear pin (2), a first O-ring (3), an upper sleeve (4), a second O-ring (5), a center tube (6), a rubber tube seat tube (7), a side rubber tube (8), a spacer (9), an intermediate rubber tube (10), a rubber tube lower seat (11), a third O-ring (12), a locking tooth (13), a ferrule (14), a cone sleeve (15), a connecting sleeve (16), a fourth O-ring (17), a fifth O-ring (18), a lower liquid cylinder (19), a sealing shear pin (20) and a lower joint (21); An upper joint (1) is installed at the upper end of the center tube (6), and a lower joint (21) is installed at the lower end of the center tube (6). An upper sleeve (4) is sleeved around the outer periphery of the upper joint (1) and the center tube (6). An unsealing shear nail (2) is arranged between the upper joint (1) and the upper sleeve (4). An oil drain hole (22) is opened on the upper joint (1). The oil drain hole (22) on the upper joint (1) and the upper sleeve (4) are sealed by a first O-ring (3). The upper sleeve (4) is provided between the upper joint (1) and the center tube (6). The second O-ring (5) is sealed between the upper sleeve (4) and the center tube (6). The lower part of the upper sleeve (4) is connected to the rubber tube seat tube (7). The outer circumference of the rubber tube seat tube (7) is sleeved with a side rubber tube (8) and two middle rubber tubes (10) from top to bottom. A spacer (9) is arranged between the side rubber tube (8) and the middle rubber tube (10) and between two adjacent middle rubber tubes (10). The lower part of the rubber tube seat tube (7) is sleeved with a clamping tooth (13). A clamping tooth (13) is used between the rubber tube seat tube (7) and the clamping tooth (13). A threaded connection is provided, wherein a rubber cartridge lower seat (11) is installed at the lower part of the rubber cartridge seat tube (7), a third O-ring (12) is used to seal between the rubber cartridge seat tube (7) and the rubber cartridge lower seat (11), a ferrule (14) and a connecting sleeve (16) are installed at the lower part of the rubber cartridge lower seat (11), a center tube (6) is installed with a tapered sleeve (15), a threaded connection is adopted between the center tube (6) and the tapered sleeve (15), and the tapered sleeve (15) is located between the center tube (6) and the ferrule (14); a ferrule (14) is provided at the lower part of the connecting sleeve (16). A lower liquid cylinder (19) is installed at the bottom, the lower liquid cylinder (19) and the center tube (6) are sealed by a fourth O-ring (17), the lower liquid cylinder (19) and the lower joint (21) are sealed by a fifth O-ring (18), a sealing shear pin (20) is arranged between the lower liquid cylinder (19) and the lower joint (21), and the lower liquid cylinder (19) and the lower joint (21) are positioned by the sealing shear pin (20); and a liquid outlet hole (23) is opened at the center tube (6) at the position of the lower liquid cylinder (19).

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