CN101713281A

CN101713281A - self-expansion bonding packer

Info

Publication number: CN101713281A
Application number: CN200810157432A
Authority: CN
Inventors: 韩志刚; 李志强; 孙文龙; 豆占锋; 刘景斌
Original assignee: 刘景斌
Priority date: 2008-10-07
Filing date: 2008-10-07
Publication date: 2010-05-26

Abstract

The invention discloses a self-expansion bonding packer, comprising an upper joint, a central pipe, an upper pressure spring, a lower pressure spring, an upper compression ring, a lower compression ring, an expansion adhesive barrel, a distance ring, a slide pipe and a lower joint, wherein the external surface of the expansion adhesive barrel is coated with a layer of bonding cylindrical rubber which can self expand under a certain temperature when contacting with water.The packer is arranged on a tubular column and descends to a preset position in an oil/water well, and the expansion adhesive barrel self expands in water and is boned and fixed on the inner wall of the tubular column to achieve the purposes of sealing sleeves and packing oil layers.If the tubular column is pressed to extend downwards, the upper joint drives the central pipe to descend in the slide pipe to press the upper pressure spring to shrink and the lower pressure spring to extend, thus preventing the expansion adhesive barrel from being shifted and damaged, canceling the tubular column anchoring technolgy and reducing sleeve damage,realizing self expansion of the adhesive barrel and sealing sleeve patch, having good sealing effect, improving waterflooding efficiency and enhancing oil production.

Description

Self-expansion bonding packer

The invention discloses a kind of self-expansion bonding packer.

Background technology

The packer that oil exploitation at present, water filling are used is to utilize the expansion of mechanical compress rubber tube to come Sealed casing pipe, reaches the separation oil reservoir, and seperated layer water injection is recovered the oil.Internal surface of sleeve pipe surface originally is smooth, sealing effectiveness is good, but because sleeve pipe is in the underground burn into scale effect that is subjected to sewage, the surface forms loose concavo-convex body within it, and loose concavo-convex body is difficult for sealing, and bad rubber tube also can be pricked in concavo-convex surface, make packer rubber not be close to internal surface of sleeve pipe and miss, the oil-separating layer failure causes the waterflooding development effect variation, and oil recovery reduces.

Summary of the invention

Task of the present invention is: design a kind of self-expansion bonding packer, solve packer and miss because the uneven rubber of internal surface of sleeve pipe can not be close to the internal surface of sleeve pipe sealing, cause the oil-separating layer failure problem.

The utility model is realized in the following way: self-expansion bonding packer is made up of 1 top connection, 2 central tubes, 3, compression spring, 4 upper press rings, 5 expansion packing elements, 6 spacer rings, 7 times pressure rings, 8, slip pipe, 9 times stage clips, 10 lower contacts.Expansion packing element 5 is rubber bodies cylindraceous, meets water and can expand voluntarily at a certain temperature.When self-expansion bonding packer is installed on the tubing string, be lowered to precalculated position in oil, the well, the expansion packing element expands in water after after a while voluntarily, is adhesively fixed on the casing string inwall, reaches Sealed casing pipe, the oil-separating layer purpose.If the tubing string pressurized extends downwards, it is descending in slip pipe that top connection 1 drives central tube 2, and compressing compression spring 3 shrinks, and descends stage clip 9 elongations simultaneously, and it is unshift to reach protection expansion packing element 5.

Beneficial effect of the present invention

1. realized that packing element self expands, sealing subsidy sleeve pipe, good sealing effect improves the water filling waterflood efficiency, many quarrying oil.2, pressured spring shrinks or elongation, makes the central tube displacement, and the expansion packing element is motionless, has prevented the tubing string wriggling, damages packing element.3. cancellation tubing string grappling technology reduces sleeve pipe and damages.

Description of drawings

Fig. 1 is a kind of assembling schematic diagram of self-expansion bonding packer;

Form by 1 top connection, 2 central tubes, 3 compression springs, 4 upper press rings, 5 expansion packing elements, 6 spacer rings, 7 times pressure rings, 8 slip pipes, 9 times stage clips, 10 lower contacts.

The specific embodiment

The self-expansion bonding packer upper end is top connection (1), top connection (1) is circular steel cylinder, upper end system internal thread connects the top oil pipe, system external screw thread in lower end connects the internal thread of central tube (2), central tube (2) is the externally threaded steel pipe of two ends band, dress slip pipe (8) in the central tube (2), stage clip (3), (9) up and down.Stage clip (3), (9) are contained in slip pipe (8) two ends up and down, slip pipe (8) is a tubular body, two ends system external screw thread, slip pipe (8) are gone up suit upper press ring (4), expansion packing element (5), spacer ring (6), pressure ring (7) down, and are connected to form an integral body with the internal thread of pressure ring up and down.Pressure ring (3) is circular steel cylinder up and down, inboard system internal thread.Spacer ring (6) is 2-3 a circular steel cylinder, is placed on expansion packing element (5) two ends, plays centralizing function.Expansion packing element (5) is a 3-4 expanded rubber body cylindraceous, and the expanded rubber external surface is coated with one deck convered structure, the expanded rubber body can be automatically in water the uniform temperature expansion bonding to the convex-concave surface of internal surface of sleeve pipe, reach the seal isolation oil reservoir.Because the expanded rubber body is the rubber bodies material, when construction proposes tubing string again the rubber bodies surface breakdown extracted and get final product.

Claims

1. one kind by top connection (1), central tube (2), compression spring (3), upper press ring (4), expansion packing element (5), spacer ring (6), following pressure ring (7), slip pipe (8), following stage clip (9), the self-expansion bonding packer that lower contact (10) is formed, it is characterized in that: top connection (1), top connection is circular steel cylinder, upper end system internal thread connects the top oil pipe, system external screw thread in lower end connects the internal thread of central tube (2), central tube (2) is the externally threaded steel pipe of two ends band, dress slip pipe (8) in the central tube (2), on, following stage clip (3), (9), stage clip (3) up and down, (9) be contained in slip pipe (8) two ends, slip pipe (8) is a tubular body, two ends system external screw thread, slip pipe (8) is gone up suit upper press ring (4), expansion packing element (5), spacer ring (6), following pressure ring (7), and with up and down, the internal thread of pressure ring is connected to form an integral body, on, following pressure ring (3) is circular steel cylinder, inboard system internal thread.Spacer ring (6) is 2-3 a circular steel cylinder, is placed on expansion packing element (5) two ends, and expansion packing element (5) is a 3-4 expandable rubber body cylindraceous, and the expanded rubber external surface is coated with one deck convered structure.