CN200968195Y

CN200968195Y - Permanent type sealing anchoring packer

Info

Publication number: CN200968195Y
Application number: CN 200620036079
Authority: CN
Inventors: 张道鹏; 潘勇; 王忠胜; 向斌
Original assignee: SICHUAN PETROLEUM UNDERGROUND WORKING Co
Current assignee: Underground operation Company, CNPC Sichuan Petroleum Geophysical Prospecting Company
Priority date: 2006-11-02
Filing date: 2006-11-02
Publication date: 2007-10-31
Anticipated expiration: 2016-11-02

Abstract

An eternal sealing anchoring packer is used for oil-gas well trial repairing, production increasing, protection sleeve and well completion exploration, which belongs to the manufacturing technical field of petroleum natural-gas industrial well completion under-well tool and comprises a connector part, an anchoring part, a setting part and a sealing part; wherein, the connector part comprises an upper lifting subs and a lower connector; the anchoring part comprises a slip seat, an upper slip, a lower slip, an upper cone, a lower cone, a cone shear pin, a thread tightening lock-up sleeve, a bullet claw tube, a safety shear pin, a bullet claw unlocking sleeve and a unlocking shear pin; the setting part comprises a cylinder jacket and a piston jacket; the sealing part comprises a central tube, a sealing extension tube, an inserted tube sealing assembly, a sealing component, an inflation-prevention ring group, a separation ring, a rubber column seat and a rubber column. The utility model is characterized in improving the tightness reliability and durance of the packer in the production measure and well completion gas collection process, which provides a novel tool for trial repairing and digging of the old well and the well completion gas exploration process.

Description

Permanent type sealing anchoring packer

Technical field: a kind of permanent type sealing anchoring packer, be used for that the examination of oil gas well is repaiied, well stimulation and the exploitation of protective casing completion, belong to the manufacturing technology field of industrial gas oil completion downhole tool.

Background technology: when exploitation of oil-gas field to the later stage, because the oil gas well production descends or is exhausted, often need this aboveground other payzone tried to repair operation, and these old wells often exist phenomenons such as the well head pressure-bearing is low, casing damage, therefore, when trying to repair operation and completion, must use packer that sleeve pipe is effectively protected, at present, the packer of The field has the Y453 intubate packer of mechanical-set Y211 packer and hydraulic setting etc., but these packers in use also exist shortcoming and defect; (1), the Y211 packer is to rely on the weight compression of tubing string to set, such method is after completion, the weight of tubing string also can make tubing bending, therefore can have a strong impact on the application life of oil pipe, because the bending of oil pipe and the influence of packer self structure can cause jam when well workover pulls out of hole afterwards; (2), with Y453 intubate packer, to carry out perforation, kill job earlier, because needing special-purpose setting tool during packer setting could realize setting, so must packer and special-purpose setting tool be delivered to the down-hole with tubing string, tubing string with special-purpose setting tool after setting trips out well, and tubing string is inserted into the interpolation pipe seal assembly in the packer central tube next time again; Owing to repeatedly play lower tubular column and for a long time existence of these problems of kill-job, the job scheduling that can occasion a delay increases operating cost and to the injury of gas-bearing formation, have in addition can't finish old well examination and repair the operation of taping the latent power.

Summary of the invention: the purpose of this utility model is at the deficiencies in the prior art, adopts the entire combination designing technique, and a kind of permanent type sealing anchoring packer that the packer setting tool and the sealing cannula design of dispersion are one is provided.

The utility model is achieved in that the utility model comprises joint, grappling, sets and seal four parts, comprises that lower slips is sat, gone up to lifting sub, lower contact, central tube, sealing extension, interpolation pipe seal assembly, slips, upward lower cone, protrusion-dispelling tensioner ring group, glue tube base, packing element, spacer ring, screw thread step are tightly ended lock tube, piston bush, cylinder sleeve, safe shear pin, spring claw tube, spring claw unlocking sheath and seal; Described central tube upper end and sealing extension lower end link together by slip spider, and the central tube outside is installed described slips successively, upward lower cone, protrusion-dispelling tensioner ring group, glue tube base, packing element, spacer ring, screw thread go on foot the tight lock tube that ends, and the central tube lower end connects lower contact; The described lifting sub, interpolation pipe seal assembly, spring claw tube gone up links together from top to bottom, interts in central tube, and the spring claw tube lower end is anchored in the lower contact on the cannelure by spring claw unlocking sheath, and spring claw unlocking sheath is axially fixed in the lower contact by the release shear pin; Piston bush is arranged in the annular space of central tube bottom cylindrical and cylinder sleeve inner chamber formation, the interior circle and the cylindrical of piston bush lower end are provided with seal, seal mutually with central tube and cylinder sleeve respectively, the bottom of cylinder sleeve is connected with the upper end of lower contact, the top of cylinder sleeve is enclosed within tight lower end of ending lock tube of screw thread step, is fixed by the safety shear pin.Shoulder also is provided with seal outside the lower contact top, seals mutually with cylinder sleeve.

Advantage of the present utility model and beneficial effect are: the interpolation pipe seal assembly of employing interts the integral structure of structure in central tube and sealing, setting mechanism, make set, perforation, acidifying and completion gas production operation, one time lower tubular column just can be finished, simplified construction technology, accelerated the operation process, have the advantage that reduces operating cost, and tap the latent power and the completion gas producing technology provides a kind of new tool for old well tries to repair; Prove, to have sealing reliability and the persistent characteristics of the packer of raising in well stimulation and completion gas production process by the interior sealing anchoring structure that interpolation pipe seal assembly, spring claw tube, lower contact, spring claw unlocking sheath are formed through field trial.

Description of drawings

Fig. 1 is the utility model cross-sectional view.

The specific embodiment: provide most preferred embodiment of the present utility model below in conjunction with accompanying drawing: the utility model is made up of joint, grappling, the structure that sets and seal four parts, and blank area comprises lifting sub 1 and lower contact 22; Anchor portion comprises slips seat 3, upper slips 5 and lower slips 14, upper cone 7 and lower cone 12, cone shear pin 13, tight lock tube 15, spring claw tube 16, safe shear pin 17, spring claw unlocking sheath 23, the release shear pin 24 of ending of screw thread step; Set part and comprise cylinder sleeve 18, piston bush 19; Hermetic unit comprises central tube 6, sealing extension 2, interpolation pipe seal assembly 4,

seal

20 and 21, protrusion-dispelling tensioner ring group 8, spacer ring 11, glue tube base 9, packing element 10;

Erection sequence of the present utility model is: the upper end of central tube 6 is connected by slip spider 3 with sealing extension 2 lower ends, the outside of central tube 6 is installed slips 5 successively and lower slips 14, upper cone 7 and lower cone 12, protrusion-dispelling tensioner ring group 8, glue tube base 9, packing element 10, spacer ring 11, screw thread step are tightly ended lock tube 15, and upper and lower slips 5 and 14 external shafts are to evenly offering eight stress grooves; The lower end of central tube 6 connects lower contact 22, cylindrical at central tube 6 axially is provided with the shear pin groove, upper/

lower cone

7 and 12 is axially fixed on the shear pin groove of central tube 6 by cone shear pin 13, central tube 6 bottoms are provided with pressure transmission hole, be provided with radial clearance between central tube 6 and the spring claw tube 16, be symmetrical arranged 4～6 axial grooves in spring claw tube 16 bottoms; Protrusion-dispelling tensioner ring group 8 be installed on upper/

lower cone

7 and 12 and glue tube base 9 between, be provided with shoulder at the upper and lower end cylindrical of packing element 10, glue tube base 9 is installed on the shoulder of packing element 10, spacer ring 11 is installed on the centre of packing element 10; Last lifting sub 1 is connected with interpolation pipe seal assembly 4, spring claw tube 16 is connected with interpolation pipe seal assembly 4, form top-down connection, be enclosed within the central tube 6 after connecting, interpolation pipe seal assembly 4 is " V " type bi-directional combination packing_seal structure, interior circle in lower contact 22 has cannelure, spring claw tube 16 lower ends are anchored on by spring claw unlocking sheath 23 on the interior cannelure of lower contact 22, and spring claw unlocking sheath 23 is axially fixed in the lower contact 22 by release shear pin 24; Between the inner chamber of the bottom of central tube 6 cylindrical and cylinder sleeve 18, constitute an annular space, piston bush 20 is installed in the annular space of central tube 6 bottom cylindricals and cylinder sleeve 18 inner chambers formation, the lower end inside and outside circle of piston bush 19 is provided with

seal

20 and 21, and seal 20 seals with central tube 6 and cylinder sleeve 18 mutually with 21; Cylinder sleeve 18 bottoms connect the upper end of lower contact 22, and the upper end of cylinder sleeve 18 is enclosed within tight lower end of ending lock tube 15 of screw thread step, and fixing by safety shear pin 17, shoulder is provided with seal 20 outside lower contact 22 tops, and seal 20 seals mutually with cylinder sleeve 18;

During construction, the lower end of lower contact 22 connects oil pipe and special-purpose setting ball seat, from throwing steel ball in the well head oil pipe to special-purpose setting ball seat, in oil pipe, suppress, the axial groove of pressure through spring claw tube 16 lower ends passes to the bottom of central tube 6, and be delivered in the cylinder sleeve 18 that piston bush 19 is housed by the pressure transmission hole on the central tube 6, piston bush 19 is under the effect of pressure, upwards promote the tight lock tube 15 that ends of screw thread step and cut off safe shear pin 17, distending lower slips 14, and promote lower slips 14 to the up internal surface of sleeve pipe that is close to, when continuing to be pressurized to certain pressure, cut off cone shear pin 13, compression packing element 10 until distending upper slips 5, is stuck on the internal surface of sleeve pipe it, simultaneously, the screw thread step, the tight lock tube 15 that ends was locked with central tube 6, so far, had formed the two way seal grappling between packer and the sleeve pipe; When pressure reached setting value, the interior cover of special-purpose setting ball seat and steel ball are sprained fell the shaft bottom, the oil pipe pressure release, and packer is finished and is set;

When the operation of needs well workover lift pipe string, throw steel ball on spring claw unlocking sheath 23, sprain to press and cut off release shear pin 24, destroy spring claw unlocking sheath 23, the upper lifting pipe post, contracting in spring claw tube 16 bottoms loses grappling, thereby realizes pulling out of hole smoothly.

Claims

1, a kind of permanent type sealing anchoring packer comprises joint, grappling, sets and seals four parts, and it is characterized in that: blank area comprises lifting sub and lower contact; Anchor portion comprises slips seat, upper slips and lower slips, upper cone and lower cone, cone shear pin, tight lock tube, spring claw tube, safe shear pin, spring claw unlocking sheath, the release shear pin of ending of screw thread step; Set part and comprise cylinder sleeve, piston bush; Hermetic unit comprises central tube, sealing extension, interpolation pipe seal assembly, seal, protrusion-dispelling tensioner ring group, spacer ring, glue tube base and packing element:

A. the upper end of described central tube is connected by slip spider with sealing extension lower end, upper slips and lower slips, upper cone and lower cone, protrusion-dispelling tensioner ring group, glue tube base, packing element, spacer ring, the tight lock tube that ends of screw thread step are housed in the outside of central tube, the lower end of central tube connects lower contact, and upper/lower cone is axially fixed on the shear pin groove of central tube by the cone shear pin;

B. described protrusion-dispelling tensioner ring group is installed between upper/lower cone and the glue tube base, and glue tube base is installed on the shoulder of packing element, and spacer ring is installed on the centre of packing element;

C. the described lifting sub of going up is connected with the interpolation pipe seal assembly, spring claw tube is connected with the interpolation pipe seal assembly, the spring claw tube lower end is anchored on the interior cannelure of lower contact by spring claw unlocking sheath, spring claw unlocking sheath is axially fixed in the lower contact by the release shear pin, and piston bush is installed in the annular space of central tube bottom cylindrical and cylinder sleeve inner chamber formation;

D. described cylinder sleeve bottom connects the upper end of lower contact, and the upper end of cylinder sleeve is enclosed within tight lower end of ending lock tube of screw thread step, is fixed by the safety shear pin.

2, permanent type according to claim 1 sealing anchoring packer is characterized in that: at described upper and lower slips external shaft to evenly offering 8 stress grooves.

3, permanent type sealing anchoring packer according to claim 1, it is characterized in that: the cylindrical at described central tube axially is provided with the shear pin groove, be provided with pressure transmission hole in the central tube bottom, an annular space is arranged between the inner chamber of the bottom of central tube cylindrical and cylinder sleeve, between central tube and spring claw tube, be provided with radial clearance, be symmetrically arranged with 4～6 axial grooves in described spring claw tube bottom.

4, permanent type sealing anchoring packer according to claim 1, it is characterized in that: described interpolation pipe seal assembly is " V " type bi-directional combination packing_seal structure.

5, permanent type sealing anchoring packer according to claim 1, it is characterized in that: the upper and lower end cylindrical of described packing element is provided with shoulder.

6, permanent type according to claim 1 sealing anchoring packer, it is characterized in that: shoulder is provided with seal outside the described lower contact top, has cannelure at the interior circle of lower contact.

7, permanent type sealing anchoring packer according to claim 1, it is characterized in that: the lower end inside and outside circle of described piston bush is provided with seal.