CN207229058U

CN207229058U - A kind of packer

Info

Publication number: CN207229058U
Application number: CN201720709255.4U
Authority: CN
Inventors: 王成; 陈琦
Original assignee: TAICANG UNION TECH PRECISION MACHINERY Co Ltd
Current assignee: TAICANG UNION TECH PRECISION MACHINERY Co Ltd
Priority date: 2017-06-19
Filing date: 2017-06-19
Publication date: 2018-04-13
Anticipated expiration: 2027-06-19

Abstract

A kind of packer of the utility model, a kind of packer, includes casing, base tube and expanded rubber.Wherein, casing coaxial sleeve is arranged on outside base tube, and has gap between casing and base tube；Expanded rubber is wrapped circumferentially around on the outer wall of base tube, and wherein expanded rubber meets oil expansion.The packer of the utility model, which has, meets oily self-sealing function, simple in structure, meets the self-styled characteristic of oil using expanded rubber and realizes sealing, sealing effect and pressure-resistant effect are above conventional packer.

Description

A kind of packer

Technical field

Oil recovery technique field is the utility model is related to, it is more particularly to a kind of that there is the packer for meeting oily self-sealing function.

Background technology

Packer is one of common instrument in oil recovery technique field.Packer is used for being layered in petroleum production engineering, reduces Wel packing plug water construction process, can conveniently realize no killing well operation without open flow, and two-way can bear high pressure, use Long lifespan.With the deep understanding to oil reservoir, it is imperative that thick oil pay is taped the latent power, while also proposes higher to downhole packer It is required that.Conventional packer is mostly mechanical, it is necessary to be compressed with external force, sealing medium is realized sealing after expanding, it is most from Seal pack device uses cup packer, the sealing of packer is realized mainly by the interference fit of leather cup and casing, when going into the well Stress is big, and leather cup is easy to wear and scratches, so as to lose leakproofness.

Therefore, it is badly in need of a kind of packer simple in structure, functional, service life length of exploitation.

Utility model content

The defects of in order to overcome in the presence of the prior art, the utility model provide it is a kind of have meet oily self-sealing function Packer, the packer construction is simple, meets the self-styled characteristic of oil using expanded rubber and realizes sealing, sealing effect and pressure-resistant effect It is above conventional packer.

A kind of packer of foundation the utility model, comprising casing, base tube and expanded rubber, wherein,

Casing coaxial sleeve is arranged on outside base tube, and has gap between casing and base tube；

Expanded rubber is wrapped circumferentially around on the outer wall of base tube, and wherein expanded rubber meets oil expansion.

Further, packer is also comprising the end-rings for being arranged at the both ends of expanded rubber in the axial direction, wherein end Ring set is arranged on base tube, and end-rings are fixed on base tube by fixed screw.

Further, packer also includes and is arranged inside end-rings and is sheathed on the baffle ring on base tube and sealing ring, Baffle ring is disposed adjacent with sealing ring.

Further, sealing ring is made of EPDM.

Further, also comprising inner tube of the base tube inner wall sleeve on base tube is close to, expanded rubber is wrapped in interior packer On the outer wall of pipe.

Further, expanded rubber EPDM.

Due to being used in upper technical solution, the utility model has the following advantages that compared with prior art：

It is gap when going into the well 1. having gap in normal state between the casing and base tube of the packer of the utility model Coordinate, wearing resistance is minimum, is not easy to be worn or scratches.

2. the utility model realizes the self sealss of packer using the characteristic of expanded rubber chance oil expansion,

3. EPDM (ethylene propylene diene rubber) chemical stability is good used by expanded rubber in the utility model, wearability, Elasticity, oil resistivity is excellent and price is relatively low, can realize good oil expansion function, and of low cost.

Brief description of the drawings

Fig. 1 is the sectional view of one embodiment of packer of the utility model；

Fig. 2 is the schematic diagram of the packer shown in Fig. 1.

Description of reference numerals：

1 casing, 2 base tubes, 3 end-rings, 4 fixed screws, 5 baffle rings, 6 sealing rings, 7 expanded rubbers, 8 inner tubes.

Embodiment

In order to make the purpose of the utility model, technical solutions and advantages more clearly understood with reference to specific embodiments The utility model is further elaborated.It should be appreciated that specific embodiment described herein is only used for explaining this reality With new, it is not used to limit the utility model.

Figures 1 and 2 show that one embodiment according to the utility model.As shown in the figure, the packer include casing 1, Base tube 2 and expanded rubber 7.Wherein, 1 coaxial sleeve of casing is arranged on the outside of base tube 2, and between having between casing 1 and base tube 2 Gap, the two is clearance fit.Expanded rubber 7 is then circumferentially wrapped on the outer wall of one section of base tube 2, and expanded rubber 7 with Also there is gap between casing.Expanded rubber 7 in the utility model has the characteristic for meeting oil expansion, when running into oil, expansion Rubber 7 gradually expands, and gradually contacts casing 1 by and be expanded to and be fitted close with casing 1, so that by casing axial two Side seal every.In the embodiment of the utility model, expanded rubber 7 can be selected EPDM and be made.

In the embodiment of the utility model, packer also includes and is arranged at the both ends of expanded rubber 7 in the axial direction End-rings 3.Wherein end-rings 3 are sheathed on base tube 2, and are fixed on by fixed screw on base tube 2, so that by expanded rubber 7 are fixed on base tube 2.

Preferably, baffle ring 5 and sealing ring 6 can be set in the inside of end-rings 3.The baffle ring 5 that is wherein disposed adjacent and close Seal 6 is closely sheathed on base tube 2, to prevent from flowing between base tube 2 and expanded rubber 7 comprising the fluid including oil.At this In the embodiment of utility model, sealing ring 6 can be made of EPDM.

It is further preferred that packer can also include inner tube 8 of the inner wall sleeve of subsidy base tube 2 on base tube 2, expansion Rubber 7 is then wrapped in inner tube 8, is directly in contact to avoid expanded rubber 7 with base tube 2.

It is clearance fit compared with the packer of the prior art, when the packer of the utility model is gone into the well, wearing resistance pole It is small, it is not easy to be worn or scratches.And test result indicates that after expanded rubber runs into oil made of the EPDM, can slowly expand, Casing 1 can be touched when the 11st day, reached most tight fit with casing 1 at the 21st day, so as to fulfill sealing, by casing 1 Axial both ends packing, and can be with pressure-resistant 15Mpa.

Above example only expresses the embodiment of the utility model, its description is more specific and detailed, but can not Therefore it is interpreted as the limitation to the utility model patent scope.It should be pointed out that for those of ordinary skill in the art For, without departing from the concept of the premise utility, various modifications and improvements can be made, these belong to this practicality New protection domain.Therefore, the protection domain of the utility model patent should be determined by the appended claims.

Claims

A kind of 1. packer, it is characterised in that comprising casing, base tube and expanded rubber, wherein,

Described sleeve pipe coaxial sleeve is arranged on outside the base tube, and has gap between described sleeve pipe and the base tube；

The expanded rubber is wrapped circumferentially around on the outer wall of the base tube, is expanded wherein the expanded rubber meets oil.
2. packer according to claim 1, it is characterised in that the packer also includes and is arranged at the expanded rubber The end-rings at both ends in the axial direction, wherein the end of the collar is arranged on the base tube, and the end-rings pass through admittedly Determine screw to be fixed on the base tube.
3. packer according to claim 2, it is characterised in that the packer is also included and is arranged in the end-rings The portion and baffle ring and sealing ring being sheathed on the base tube, the baffle ring are disposed adjacent with the sealing ring.
4. packer according to claim 3, it is characterised in that the sealing ring is made of EPDM.
5. packer according to claim 1, it is characterised in that the packer, which also includes, is close to the base tube inner wall sleeve Inner tube on the base tube, the expanded rubber are wrapped on the outer wall of said inner tube.
6. according to the packer any one of claim 1-5, it is characterised in that the expanded rubber is EPDM.