CN2282060Y

CN2282060Y - Compressed self sealed thermal packer

Info

Publication number: CN2282060Y
Application number: CN 96223336
Authority: CN
Inventors: 陈卫星; 雷厚勇; 张振荣
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-12-26
Filing date: 1996-12-26
Publication date: 1998-05-20
Anticipated expiration: 2006-12-26

Abstract

The utility model relates to a compressed self-sealed thermal recovery packer, being composed of a tubing coupling, a sealing rubber cylinder, a short connecter, a lower joint, etc. The short connecter is a cylinder body, screw threads are arranged outside the upper and the lower ends, and through holes are arranged at the middle and the lower parts; the sealing rubber cylinder is sheathed on the upper part of the short connecter, and an exicrcle is made into an irregular zigzag; a piston sleeve is sheathed on the middle to lower part of the short connecter, and a guide sleeve is sheathed outside; the upper end of a reducer union is internally connected with the short connecter and is externally connected with the guide sleeve, and a sliding valve core is sheathed in the lower part of the reducer union; the lower union is externally connected with the lower part of reducer union, and is internally connected with a valve seat which is sheathed with a reset spring. The utility model has the advantages of short time for seat sealing, good sealing performance, easy unsealing, high heat utilization rate, repeated use AND reliable work.

Description

The self-styled thermal packer of a kind of compression

The utility model belongs to the improvement of petroleum industry heavy crude heat extraction packer.

At present, the jam phenomenon often takes place in China's heavy crude heat extraction packer, and sealing is poor, and heat-energy losses is serious; so both be unfavorable for protective casing, inapplicable again layer steam injection, and exist the seat envelope complicated from the thermal packer of external import; the deblocking difficulty, cost height, problems such as after-sale service inconvenience.Domestic existing a kind of self-sealing thermal packer, its relies on thermometal expansion shrinkage to change big characteristics and promotes cartridge and carry out seat envelope and deblocking automatically voluntarily.Though this thermal packer seat seals, deblocking is easy, long, seat envelope weak effect of this packer set time, and can't judge its envelope situation from well head.

The purpose of this utility model is that development is a kind of simple in structure, with low cost, and not only easily but also quick, its seat envelope effect was good, and can repair the heavy crude heat extraction packer of use repeatedly for seat envelope, deblocking.This packer has the function of compression and self-packing packer concurrently; can not only realize the automatic compression mount envelope of cartridge, and can reach the perfect condition of first the notes vapour of being honored as a queen, improve heat utilization efficiency widely; protect production string effectively, prolonged the application life of oil well.Simultaneously as a kind of monitoring means, the quality that can the monitoring results quality and the damaged condition of instlated tubular.

To achieve these goals, the self-styled thermal packer of the compression that the utility model provides is made up of tubing coupling, cartridge, short circuit, fairlead, piston bush, lower contact etc.Short circuit is a cylinder, the two ends external process has screw thread up and down, and the middle and lower part is processed with through hole, and cartridge is enclosed within short circuit top, and the cartridge cylindrical is processed as irregular zigzag.Piston bush is enclosed within the middle and lower part of short circuit, is with fairlead outward.The inline short circuit in reducer union upper end, outreach and overlap sliding valve core fairlead, bottom in, lower contact outreaches the reducer union lower end, inline valve seat, and valve seat is with back-moving spring, piston bush is that cylinder, centre have several through holes, an end to be processed with the endoporus step, be processed with seal groove at bore area, fairlead is a cylinder, and an end endoporus is processed with screw thread, the other end is smooth circular hole, the bottom of smooth circular hole is processed with screw, and two is processed with seal groove, and its top is processed with through hole.The inside and outside screw thread that all is processed with in reducer union upper end, fenestra is processed with screw thread outside the lower end.Sliding valve core is down spherosome or bullet, goes up with cylinder, and cylindrical edge is processed with through hole.

Figure of description: Fig. 1 is the self-styled thermal packer structural representation of a kind of compression

Description of drawings:

1 tubing coupling, 2 top boards, 3 cartridge

4 lower platens, 5 piston bush 6 " O " type circles

7 " O " type circle, 8 short circuits 9 cut off

10 fairleads, 11 reducer unions, 12 sliding valve cores are glad

13 lower contacts, 14 springs, 15 valve seats

Below in conjunction with Figure of description (1) the utility model is described in further detail:

When oil well is annotated vapour, sliding valve core [12] is gone up end pressure and is increased suddenly, its pressure differential overcomes the elastic force of spring [14], promoting sliding valve core [12] draws close to valve seat [15], billiard table or frustum up to sliding valve core [12] match with the chamfering of valve seat [15] endoporus, pass through by liquid (vapour) body, pressure in the tubing string constantly increases with the injection of steam like this, cut off it up to the pressure that produces in piston bush [5] bottom and cut off [9], piston bush [5] is risen along short circuit [8], compression seal packing element [3] seat is sealed sleeve pipe, the annular space that packing heat pipe and sleeve pipe are formed, meanwhile, several through holes are in the bad good sleeve pipe of cartridge [3] seat in the middle of the piston bush [5], they and short circuit [8], several through holes in the middle of the fairlead [10] are capable to become a communication passage, allows institute's steam injection flow into the stratum from passage, has so just reached the purpose of the notes of being honored as a queen earlier; Simultaneously, when playing instlated tubular, because descending need of piston bush [5] overcome faint fluid column resistance, so deblocking is very easy to, can not cause the jam phenomenon, simultaneously, spring [14] recovers elastic force, the sliding valve core [12] of upspringing allows the liquid in the tubing string flow into the stratum, and avoids polluting well head.

The self-styled thermal packer of compression is a kind of packer that has self-sealing, compression effect concurrently, distinctly with present thermal packer is: after seat is sealed cartridge earlier by the steam that injects the shaft bottom, allow institute's steam injection just can enter oil reservoir then; During deblocking, only need carry instlated tubular, the just automatic deblocking of its packer.After tripping out the back and change its cartridge from the shaft bottom, can repeat again to go into the well, can reduce the cost input widely like this.Simultaneously, it have simple in structure, reliable operation, easy to maintenance, cheap be that present any thermal packer is incomparable.

Claims

The self-styled thermal packer of compression it by: tubing coupling [1], cartridge [2], short circuit [8], lower contact [13] etc. are formed, it is characterized in that short circuit [8] is a cylinder, the upper/lower terminal external process has screw thread, in, the bottom is processed with through hole, cartridge [3] is enclosed within short circuit [8] top cylindrical and is processed as irregular zigzag; Piston bush [5] is enclosed within the middle and lower part of short circuit [8], is with fairlead [10] outward; Reducer union [11] upper end inline short circuit [8] outreaches fairlead [10], cover sliding valve core [12] in the bottom; Lower contact [13] outreaches reducer union [11] bottom, inline valve seat [15]; Valve seat [15] is with back-moving spring [14].
2. the self-styled thermal packer of a kind of compression according to claim 1 is characterized in that piston bush [5] is a cylinder, and there are several through holes the centre, and an end is processed with the endoporus step, is processed with seal groove at bore area.
3. the self-styled thermal packer of a kind of compression according to claim 1 and 2, it is characterized in that fairlead [10] is a cylinder, one end endoporus is processed with screw thread, the other end is smooth circular hole, the bottom of smooth circular hole is processed with screw, and two is processed with seal groove, fairlead [10] top is processed with through hole.
4. the self-styled thermal packer of a kind of compression according to claim 1 and 2 is characterized in that the inside and outside circle in reducer union [11] upper end all is processed with screw thread, and fenestra is processed with screw thread outside the lower end.
5. the self-styled thermal packer of a kind of compression according to claim 1 and 2 is characterized in that being spherosome or bullet under the sliding valve core [12], upward is cylinder, and cylindrical edge is processed with through hole.