CN201756937U

CN201756937U - Oil well thermal recovery packer

Info

Publication number: CN201756937U
Application number: CN2010202501929U
Authority: CN
Inventors: 张力杰; 刘庆峰; 李晓明; 张松
Original assignee: XINLANTIAN SCIENCE AND TECHNOLOGY INDUSTRY Co Ltd SHENYANG CITY
Current assignee: XINLANTIAN SCIENCE AND TECHNOLOGY INDUSTRY Co Ltd SHENYANG CITY
Priority date: 2010-07-07
Filing date: 2010-07-07
Publication date: 2011-03-09
Anticipated expiration: 2020-07-07

Abstract

The oil well thermal recovery packer belongs to the technical field of extracting oil, gas, water, soluble or meltable substances or mineral mud from wells, and more specifically relates to an improvement of the structure of an oil well thermal recovery packer in an oil field. The utility model provides an oil well thermal recovery packer with simple structure, good sealing performance, safety and reliability, and high steam injection efficiency. The utility model includes a compensation pipe, one end of the compensation pipe is connected with the buckle, and the other end is connected with the lower joint, the packer is arranged on the compensation pipe, and a sealing nut is arranged between the upper part of the packer and the compensation pipe. The packer includes a main body surrounding the outside of the compensation pipe. The upper end of the main body is provided with a pressure-bearing cover with a strip groove at the bottom, and the lower end of the main body is provided with a control cover; between the pressure-bearing cover and the control cover from inside to outside A cavity, a temperature-controlled starter and a sealing body are provided, and air holes communicating with the cavity are evenly distributed on the control cover; the lower end of the packer is fixed on the compensating pipe through the first shear screw.

Description

The well thermal recovery packer

Technical field:

The utility model belongs to producing oil, gas, water, solubilized or fusible material or slurry of mineral technical field from well, more particularly, relates to a kind of improvement of well thermal recovery packer construction of oil field.

Background technology:

Thermal packer is a kind of instrument that is used for the oil-field thick-oil steam injection thermal recovery.After installing and using, can seal the space between steam injection string and the sleeve pipe, make elevated temperature heat steam directly inject the stratum; Prevent to scurry on the gas packer with the upper part, thereby protected oil well casing, raising to annotate vapour efficient.

At present, multiple thermal packer is arranged on the market, mostly be mechanical rotating seat envelope and add two kinds of chemicals heat expansion type seat envelopes.Former structure complexity, cost height, job execution difficulty are big, and the deblocking difficulty; Latter's sealing effectiveness is poor, and chemicals is prone to distortion difference when thermal expansion, even local failure, and deblocking not.The distinct issues of promptly existing packer are the deblocking difficulties, Ka Jing very easily occurs, cause workover.

In addition because existing packer sealing weak effect, so when sealing load was big, the seal of packer was annotated vapour end one side at packer and is out of shape the swell increment maximum, between seal and sleeve pipe single face apart from 5mm about; And without any support, seal self intensity can't be born big pressure reduction to seal on annular space top, and therefore when pressure surpassed certain value, seal broke.And existing packer adopts graphite tightrope packing to make seal, and assembling is difficult, sealing effectiveness is poor, unreliable; When annotating vapour, the compensating pipe of packer lower end easily produces violent swing, makes the compensating pipe of packer lower end fragile.

Summary of the invention:

The utility model is exactly at the problems referred to above, overcomes the deficiency that prior art exists, and a kind of simple in structure, good airproof performance, safe and reliable is provided, and annotates the high well thermal recovery packer of vapour efficient.

For reaching above-mentioned purpose of the present utility model, the utility model adopts following technical scheme, the utility model comprises compensating pipe, compensating pipe one end links to each other with the change button, and the other end links to each other with lower contact, and packer is arranged on the compensating pipe, be provided with sealing nut between the top of packer and the compensating pipe, the described packer of its structural feature comprises the main body around the compensating pipe outside, and the upper end of main body is provided with the pressure cap that the bottom has bar-shaped trough, and the lower end of main body is provided with the control lid; Be disposed with cavity, temperature control starter and seal from inside to outside between pressure cap and control lid, described control covers the even pore that communicates with cavity that is furnished with; Screw is cut off on compensating pipe by first in the packer lower end.

As a kind of improvement of the present utility model, between compensating pipe below the sealing nut and main body, be provided with V font sliding ring; Little, the good sealing effect of relative friction forces.

As another kind of improvement the of the present utility model, also be provided with by second on the compensating pipe of packer below and cut off the ring of cutting of screw; Finish when annotating vapour, during steam injection string cooling retraction, as packer card well phenomenon, well head is opened difficulty, can apply certain upper lifting force to steam injection string, makes second to cut off screw and cut off, and steam injection string just can move up and down certain distance like this, is convenient to deblocking.

As a kind of preferred version of the present utility model, lower contact is provided with the guiding protective cap with through hole outward; Acutely swing the packer lower end when annotating vapour, and the guiding protective cap plays position-limiting action, thereby the protection compensating pipe avoids fatigue fracture.

As another kind of preferred version of the present utility model, between main body and pressure cap, be provided with joint ring; Prevent that gas from leaking between main body and pressure cap.

The beneficial effects of the utility model:

1, simple in structure:

Packer of the present utility model comprises the main body around the compensating pipe outside, and the upper end of main body is provided with the pressure cap that the bottom has bar-shaped trough, and the lower end of main body is provided with the control lid; Be disposed with cavity, temperature control starter and seal from inside to outside between pressure cap and control lid, described control covers the even pore that communicates with cavity that is furnished with; Therefore, it is simple in structure.

2, good airproof performance, notes vapour efficient height:

Because temperature control starter of the present utility model has adopted bimetal leaf, to the thermotonus sensitivity, when steam injecting temperature changed, seal action in time was with sleeve pipe and packer sealing; Therefore good airproof performance is annotated vapour efficient and is improved.

3, safe and reliable:

Because the upper end of the utility model packer body is provided with the pressure cap that the bottom has bar-shaped trough, when the packer internal pressure reached certain value, pressure cap fluting position and the synchronous dilatating and deformable of seal prevented the damage of packer.

Description of drawings:

Fig. 1 is a structural representation of the present utility model;

Fig. 2-1 is the structural representation of pressure cap;

Fig. 2-2 is the right view of Fig. 2-1;

Fig. 3-1 is the structural representation of control lid;

Fig. 3-2 is the right view of Fig. 3-1;

Fig. 4-1 is the structural representation of guiding protective cap;

Fig. 4-2 is the right view of Fig. 4-1;

Fig. 5 is the stereogram of Fig. 1;

1 buckle in the accompanying drawing for becoming, 2 for compensating pipe, 3 for sealing nut, 4 for pressure cap, 5 for joint ring, 6 for V font sliding ring, 7 for main body, 8 for the temperature control starter, 9 for bar-shaped trough, 10 for seal, 11 for cavity, 12 for spacing ring, 13 for the control lid, 14 for pore, 15 for packer, 16 be that first to cut off screw, 17 be that second to cut off screw, 18 be that lower contact, 20 is the protective cap that leads for cutting ring, 19.

The specific embodiment:

The utility model comprises compensating pipe 2, compensating pipe 2 one ends link to each other with change button 1, the other end links to each other with lower contact 19, packer 15 is arranged on the compensating pipe 2, be provided with sealing nut 3 between the top of packer 15 and the compensating pipe 2, described packer 15 comprises the main body 7 around compensating pipe 2 outsides, and the upper end of main body 7 is provided with the pressure cap 4 that the bottom has bar-shaped trough 9, and the lower end of main body 7 is provided with control and covers 13; Be disposed with cavity 11, temperature control starter 8 and seal 10 at pressure cap 4 and control from inside to outside between cover 13, spare on the described control lid 13 and be furnished with the pore 14 that communicates with cavity 11; Packer 15 lower ends are cut off screw 16 by first and are fixed on the compensating pipe 2.

Temperature control starter 8 is to be made of high temperature resistant bimetal leaf; Be the enforceable routine techniques of those skilled in the art.Seal 10 adopts the poly-tetrafluoro synthetic materials of corrosion-and high-temp-resistant to constitute.

Can a spacing ring 12 be set in the cavity 11 between main body 7 and the temperature control starter 8, be used for controlling the position of temperature control starter 8.

The concrete course of work below in conjunction with description of drawings packer of the present utility model:

Begin to inject vapours, vapours is injected vapours in the oil well through steam injection string and compensating pipe 2.When steam pressure progressively improves, institute's gas injection is known from experience by the control of packer 15 lower ends and is covered pore 14 on 13, enters into cavity 11; Because temperature raises, temperature control starter 8 starts, and realizes the sealing between packer 15 and sleeve pipe, makes packer 15 upper and lower sides form pressure differential.When seal 10 stressed expansions, its upper end holding capacity is bigger, can open protection seal 10 and have the pressure cap 4 of bar-shaped trough 9 this moment.When the compensating pipe 2 in temperature rising, the main body 7 was subjected to thermal stretching owing to steam injection string, first cuts off screw 16 was cut off, and packer 15 is relative with bobbin seal static; Compensating pipe 2 seals by V font sliding ring 6 with packer 15; Thereby both protected the sealing of packer 15, and made steam injection string obtain flexible compensation again.After notes vapour was finished, temperature control starter 8 and seal 10 were realized deblocking along with the reduction of temperature and pressure is reclaimed automatically; On carry steam injection string and compensating pipe 2, regain packer 15 and fulfil assignment.

Claims

1. Oil well thermal recovery packer, including compensation pipe (2), one end of the compensation pipe (2) is connected with the variable button (1), and the other end is connected with the lower joint (19), and the packer (15) is set on the compensation pipe (2), a sealing nut (3) is provided between the upper part of the packer (15) and the compensation pipe (2), and the feature is that the packer (15) includes a The main body (7), the upper end of the main body (7) is provided with a pressure bearing cover (4) with a strip groove (9) at the bottom, and the lower end of the main body (7) is provided with a control cover (13); ) and the control cover (13) are sequentially provided with a cavity (11), a temperature control starter (8) and a sealing body (10) from the inside to the outside, and the control cover (13) is evenly distributed with the cavity (11) connected air holes (14); the lower end of the packer (15) is fixed on the compensating pipe (2) by the first shear screw (16).

2. The oil well thermal recovery packer according to claim 1, characterized in that a V-shaped sliding sealing ring (6) is provided between the compensation pipe (2) and the main body (7) located below the sealing nut (3) .

3. The oil well thermal recovery packer according to claim 1, characterized in that the compensation pipe (2) below the packer (15) is provided with a shear ring (18) fixed by the second shear screw (17) .

4. The oil well thermal recovery packer according to claim 1, characterized in that the lower joint (19) is provided with a guide protective cap (20) with a through hole.

5. The oil well thermal recovery packer according to claim 1, characterized in that a sealing ring (5) is arranged between the main body (7) and the pressure bearing cover (4).