CN215718606U

CN215718606U - Telescopic rubber tube of packer

Info

Publication number: CN215718606U
Application number: CN202121905844.2U
Authority: CN
Inventors: 张琳; 张立显
Original assignee: Daqing Zhenglida Petroleum Machinery Fitting Co ltd
Current assignee: Daqing Zhenglida Petroleum Machinery Fitting Co ltd
Priority date: 2021-08-16
Filing date: 2021-08-16
Publication date: 2022-02-01
Anticipated expiration: 2031-08-16

Abstract

The utility model relates to a packer telescopic rubber cylinder, belonging to a downhole tool accessory used in the field of oil extraction in an oil field, wherein a rubber cylinder main body consists of a telescopic section I at one end, an extension section and a telescopic section II at the other end; the nesting section I is nested and connected with the connector I, the nesting section II is nested and connected with the connector II, and annular convex-concave grooves are arranged on the nesting surfaces of the nesting section I and the connector II in a tight fit manner; stretch and expand the radial from outer to interior by outer glue film, thread clamping layer and interior glue film in proper order and constitute of section, outer glue film in be equipped with the spring coil, stretch and expand the interior external surface equipartition of section and be equipped with annular groove. The packer telescopic rubber cylinder is reasonable in structural design, the reinforced metal ring is additionally arranged in the position, at the connecting head, of the rubber cylinder main body, the stability between the rubber cylinder main body and the connecting head is improved, and the service life is prolonged. Meanwhile, the rubber sleeve has the anti-creep characteristic, also has the wear-resisting, temperature-resisting, pressure-resisting, corrosion-resisting and fatigue-resisting characteristics of the common expansion rubber sleeve, and prolongs the service life of the rubber sleeve.

Description

Telescopic rubber tube of packer

Technical Field

The utility model belongs to downhole tool accessories used in the field of oil extraction in oil fields, and particularly relates to a packer telescopic rubber cylinder.

Background

Along with the continuous increase of the operation depth of the oil well, the temperature and the pressure of the existing oil-water well are high, and the performance requirement index of underground tool accessories is higher and higher. When the packer rubber barrel is used in an oil field, after the packer rubber barrel is compressed by high-pressure fluid, the packer rubber barrel can be expanded to be tightly attached to a well pipe or a well wall, so that the packing effect is realized, and operations such as water injection, fracturing, acidification, testing and the like are performed. The rubber sleeve in the prior art basically meets the actual requirement, but along with the continuous exploitation of the earth petroleum resources, the petroleum on the surface layer of the crust is increasingly reduced, so that the petroleum exploitation is shifted to a deeper layer of the crust (the depth is 3000 + 8000 m), along with the continuous increase of the oil exploitation depth, the temperature in the oil exploitation well is higher and higher, the oil exploitation device can generate physical phenomena such as thermal expansion and cold contraction along with the continuous change of the temperature and the pressure, the oil exploitation tool which enters thousands of meters on the ground surface can creep up and down, the oil exploitation equipment is unstable in work, the process conditions are difficult to control, and the service life of the oil exploitation tool is reduced. In addition, the connection stability between the existing packer rubber cylinder main body and the connector is not enough, and the packer rubber cylinder is easy to damage and short in service life.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects of the prior art and provides a packer telescopic rubber cylinder.

The packer telescopic rubber cylinder comprises a rubber cylinder main body, wherein the rubber cylinder main body consists of a telescopic section I at one end, an expansion section and a telescopic section II at the other end; the nesting section I is nested and connected with the connector I, the nesting section II is nested and connected with the connector II, and annular convex-concave grooves are arranged on the nesting surfaces of the nesting section I and the connector II in a tight fit manner; stretch and expand the radial from outer to interior by outer glue film, thread clamping layer and interior glue film in proper order and constitute of section, outer glue film in be equipped with the spring coil, stretch and expand the interior external surface equipartition of section and be equipped with annular groove.

As a further improvement of the utility model, more than two metal rings are arranged in the nesting section I and the nesting section II.

As a further improvement of the utility model, the specifications of the connector I and the connector II are the same, and the outer diameter of the extending section is not less than that of the connector I.

As a further improvement of the utility model, the outer end surfaces of the connector I and the connector II are both provided with threads.

The packer telescopic rubber cylinder is reasonable in structural design, and the rubber cylinder is composed of a telescopic section and an expansion section, so that the rubber cylinder can retract freely by elasticity after being unsealed; the reinforced metal ring is added in the position of the rubber cylinder main body at the connector, so that the stability between the rubber cylinder main body and the connector is improved, and the service life is prolonged. Particularly, the rubber sleeve has the anti-creep characteristic and also has the wear-resisting, temperature-resisting, pressure-resisting, corrosion-resisting and fatigue-resisting characteristics of the common expansion rubber sleeve, so that the service life of the rubber sleeve is prolonged, and the oil exploitation cost is reduced.

Drawings

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

Detailed Description

The packer telescopic rubber cylinder of the utility model is further explained with reference to fig. 1.

Example 1

The packer telescopic rubber cylinder comprises a rubber cylinder main body 1, wherein the rubber cylinder main body 1 consists of a telescopic section I2 at one end, an expansion section 3 and a telescopic section II 4 at the other end; the nesting section I2 is connected with the connector I5 in a nesting and overlapping mode, the nesting section II 4 is connected with the connector II 6 in a nesting and overlapping mode, and annular convex-concave grooves are formed in the nesting and overlapping surfaces of the nesting section II 4 and the connector II 6 and are in tight fit; stretch and expand section 3 and radially from outer to interior constitute by outer glue film 7, double-layered line layer 8 and interior glue film 9 in proper order, outer glue film 7 in be equipped with spring coil 11, all be equipped with the metal loop 10 more than two in intussusception section I2 and the intussusception section II 4.

Example 2

The packer telescopic rubber cylinder comprises a rubber cylinder main body 1, wherein the rubber cylinder main body 1 consists of a telescopic section I2 at one end, an expansion section 3 and a telescopic section II 4 at the other end; intussusception section I2 overlaps mutually with connector I5 and overlaps and be connected, intussusception section II 4 overlaps mutually with connector II 6 and overlaps and be connected, intussusception section I2 all is equipped with the becket above two 10 with intussusception section II 4 in, and have annular convex-concave groove tight fit on mutual cover face of piling up, connector I5 is the same with II 6 specifications of connector, stretch the external diameter that expands section 3 and be not less than connector I5's external diameter, connector I5 and II 6's of connector outer end surface all are equipped with the screw thread. Stretch and expand section 3 radially from outer to interior constitute by outer glue film 7, double-layered line layer 8 and interior glue film 9 in proper order, the line at double-layered line layer 8's both ends is 6 ~ 10 layers, the line at middle part is 4 ~ 8 layers, its aim at makes the extension of middle part expand the power and be greater than the extension of both ends and expand the power.

The outer rubber layer 7 is internally provided with a spring ring 11, the spring ring 11 is in a retraction state when the rubber sleeve main body 1 does not work, and expands along with the expansion of the extension section when the work is performed to seal the sleeve. Stretch and expand the interior, the surface of section 3 and all be equipped with annular groove 12, annular groove 12 has realized that the packing element is stretching to expand the section 3 prevent creeping, the device prevent creeping characteristic realize through stretching the annular groove 12 that expands section 3 promptly, when the device is located the pit below, to the intraductal high-pressure liquid that dashes into of center, the expansion of section 3 that stretches of packing element forms in close contact with the wall of a well, produce huge frictional force between annular groove 12 and the wall of a well this moment, thereby utilize this frictional force can prevent the device's upper and lower wriggling and reach the upper and lower drunkenness that restricts the oil recovery instrument.

Stretch and expand section 3 and wholly be the contraction state when not using, annular groove 12's effect lies in that better realization is stretched the inflation that expands section 3 and is returned and restore to the throne, the inside liquid of packer directly contacts with interior glue film, when interior glue film inflation, stretch and expand spring coil 11 in section 3 thereupon inflation, form the support to outer glue film, improve holistic intensity and reduce the possibility of rupture, institute's spring coil 11 is the heliciform, spring coil 11 also can promote simultaneously and stretch the pressure release that expands section 3 and contract the performance.

Claims

1. A packer telescopic rubber cylinder comprises a rubber cylinder main body (1), wherein the rubber cylinder main body (1) is composed of a telescopic section I (2) at one end, an extension section (3) and a telescopic section II (4) at the other end; the device is characterized in that the nesting section I (2) is connected with the connector I (5) in a nesting and overlapping mode, the nesting section II (4) is connected with the connector II (6) in a nesting and overlapping mode, and annular convex-concave grooves are arranged on the nesting and overlapping surfaces of the nesting and overlapping sections and are in tight fit with each other; the stretching section (3) is sequentially composed of an outer rubber layer (7), a wire clamping layer (8) and an inner rubber layer (9) from outside to inside in the radial direction, and a spring ring (11) is arranged in the outer rubber layer (7); the inner surface and the outer surface of the extending section (3) are uniformly distributed with annular grooves (12).

2. A packer telescopic rubber sleeve according to claim 1, characterised in that more than two metal rings (10) are provided in each of the telescoping section i (2) and the telescoping section ii (4).

3. The packer telescopic rubber sleeve as claimed in claim 1 or 2, characterized in that the connector I (5) and the connector II (6) have the same specification, and the outer diameter of the expanding section (3) is not less than the outer diameter of the connector I (5).

4. The packer telescopic packing element of claim 1 or 2, wherein the outer end surfaces of the connector i (5) and the connector ii (6) are provided with threads.