CN2365393Y

CN2365393Y - Packer

Info

Publication number: CN2365393Y
Application number: CN 99207783
Authority: CN
Inventors: 李勇; 崔奋; 陈振杰; 刘德基; 赵杨民
Original assignee: Drilling Art And Production Inst Tuha Petroleum Exploration And Development Co
Current assignee: Drilling Art And Production Inst Tuha Petroleum Exploration And Development Co
Priority date: 1999-04-14
Filing date: 1999-04-14
Publication date: 2000-02-23
Anticipated expiration: 2009-04-14

Abstract

The utility model provides a packer, particularly a bidirectional slip packer which seals and unseals by adopting a mechanical method. The packer is mainly composed of a self-locking mechanism, an upper (lower) slip, an upper (cone) body and a rubber cylinder. The existing defect of the prior art is overcome effectively. The utility model has the advantages of compact device structure, exact action, reliable seal and convenient unsealing, and the unsealing force has no relationship with the supported working pressure.

Description

A kind of packer

The utility model relates to a kind of separator that oil-gas field development is used, and its bearing capacity and deblocking power are irrelevant.

Oil-gas field development is to certain phase, and workloads such as machinery card blocking layer position, the acidifying of branch (choosing) layer increase gradually.The bi-directional slip packer that such operation is at present adopted, mainly be by hydraulic base sealed, its deblocking power is relevant with bearing capacity, deblocking power is leaned on the shear pin number or is cut ring size and determine, to some operation (as shutoff water layer, gas-lift production etc.), has increased operation procedure and difficulty by hydraulic base sealed packer, improve bearing capacity, need to increase shear pin number or increase and cut ring size, this tends to increase the deblocking load, cause packer exist can not deblocking danger.

The purpose of this utility model is: a kind of packer is provided, adopts the bi-directional slip packer of mechanical system seat envelope, deblocking.It can guarantee effectively that bearing capacity and deblocking power have nothing to do, thereby overcomes the defective that prior art exists.

Fig. 1. the utility model structural representation

Fig. 2. the utility model center tube structure schematic diagram

Fig. 3. J-shaped hook structure schematic diagram on the utility model

Fig. 4. be the A-A sectional drawing of Fig. 3

Fig. 5. be the expanded view of Fig. 3

Fig. 6. the utility model upper cone structural representation

Fig. 7. be the A-A sectional view of Fig. 6

Fig. 8. the utility model seal assembly half section structural representation

Fig. 9. the utility model seat be honored as a queen the self-locking mechanism lock shaft upwards move the part (during the tubing string pressure-bearing of top) schematic diagram

Figure 10. the utility model seat be honored as a queen the self-locking mechanism lock shaft upwards move the part (during the tubing string tension of top) schematic diagram

Describe the utility model in detail below in conjunction with accompanying drawing. Such as Fig. 1, central tube 2 upper ends connect top connection 1, be set with successively self-locking mechanism assembly, upper slips assembly, upper cone assembly, packing element, lower cone downwards Assembly, lower slips assembly and lower contact.

Wherein: the self-locking mechanism assembly is that pressure cap 3 is comprising spring 4 and is sleeved on top connection 1 and the central tube 2, is provided with jump ring 5 between pressure cap 3 and central tube 2.

The upper slips assembly is a suit upper slips seat 6 on the central tube 2, and upper slips seat 6 connects upper slips 7, and is provided with slips spring 8 and upper slips inner spring 9 in the chamber of upper slips 7.

The upper cone assembly is to be sleeved on that J-shaped hook 13 and shear pin 12 on cone support ring 10 between central tube 2 and the upper slips 7, the jump ring 11 and interconnective upper cone 14, upper cone 15 get on the right track shear pin 16, glue tube base 17, screw 18, the pressure ring 19, the seal assemblies 20 that are included in the glue tube base 17 constitute.

Packing element is served as reasons several sections and is sleeved on the long rubber bush 21 on the glue tube base 17, short rubber bush 23 and spacer ring 22 formations.

Lining 25 is sleeved on the central tube 2, and its upper end is connected with the lower end of glue tube base 17 is repeatedly wrong, and lower cone 24 is sleeved on the lining 25; Lining 25 be provided with jump ring 33 bottom.

The lower slips assembly is made up of the lower slips 26 and brake pad 29, the lower slips seat 31 that are sleeved on the lining 25.Wherein lower slips seat 31 directly is enclosed within on the lining 25, and its outside connects brake pad 29, is provided with screw 27 and last gland 28 at an upper portion thereof; Its middle part is provided with down gland 32.Be provided with brake pad spring 30 in the chamber between brake pad 29 and lower slips 31; Its underpart is connected with the lower contact 35 that is provided with lower railway shear pin 34.

As Fig. 2, the outer wall of central tube 2 is the tube wall of a plurality of steps, which is provided with shear pin hole 40; Its middle part outer wall is the polygon tube wall 41 that four planes are arranged.

As Fig. 3, Fig. 4, Fig. 5, last J-shaped hook 13 is provided with shear pin hole 42, has J-shaped groove 43 on its tube wall, forms uniform groove continuously at cylindrical 360 degree.

As Fig. 6, Fig. 7, the top of upper cone 14 is a conehead 44; Upper cone 14 is provided with six vertically to the vertical slot 45 of its underpart.

As Fig. 8, seal assembly 20 is made of steel body 46 clamping joint rings 47 and support ring 48.

As Fig. 9, for self-locking mechanism of the present utility model when the tubing string pressurized of top, the self-locking mechanism lock shaft state that moves up; As Figure 10, for self-locking mechanism of the present utility model when the tubing string tension of top, the self-locking mechanism lock shaft state that moves up.

Embodiment: in packer was gone into the well process, lower railway screw 34 hung on the J-shaped hook of lower slips seat 31, and the polygon tube wall 41 on the central tube 2 can be avoided packer seat envelope midway.Behind the packer G.I.H precalculated position, the upper lifting pipe post, tubing string is transferred in dextrorotation again, lower railway screw 34 skids off from the J-shaped hook of lower slips seat 31, because the frictional force effect of brake pad 29 and internal surface of sleeve pipe, relative displacement takes place with lower slips 26 in central tube 2, and lower cone 24 struts lower slips 26 and sting on internal surface of sleeve pipe, and central tube 2 continues to move down.Cone support ring 10 enters in the upper cone 14, and upper slips 7 contact upper cones 14 backs are strutted and sting on internal surface of sleeve pipe; The screw 16 that gets on the right track simultaneously enters J-shaped hook 13, pressure cap 3 is pressed on the upper slips seat 6, the sealing surface of central tube 2 contacts with seal assembly 20, continue to transfer tubing string, central tube 2, upper slips 7, upper cone 14, last J-shaped hook 13, the screw 16 that gets on the right track, glue tube base 17 move down when being equal to, and the compression packing element is finished the seat envelope.

After the packer set, form self-locking by last J-shaped hook, the screw that gets on the right track, cone support ring, last (descending) cone, length (weak point) packing element, last (descending) slips, pressure cap, spring etc., and bear and press or press down.After the packer set, if eliminate the effect of tubing string weight, tubing string is in free state, and compressed packing element has open trend, lower cone is produced downward active force born by lower slips, glue tube base is produced active force upwards act on the upper slips.If be stretched (pulling force is less than urgent release force) this moment, central tube drives to go up on the J-shaped hook and moves, and when the screw that gets on the right track was in J-shaped hook bottom dead centre, central tube was static relatively.Because the effect of spring, pressure cap still exists for the pretightning force of upper slips, so packer still can deblocking.Active force to packer when in like manner packer bears pressure reduction acts on the lower slips, and the active force to packer when bearing down pressure reduction acts on the upper slips.

The utility model has two kinds of deblocking modes, a kind of is normal deblocking, puts down tubing string earlier, carries in the dextrorotation then, the screw that gets on the right track is thrown off from last J-shaped hook, continue the upper lifting pipe post, jump ring brings out the cone support ring from upper cone, and the cone support ring brings out upper slips again, throw off with upper cone, continue the upper lifting pipe post, lower cone and lower slips are thrown off, and finish the packer deblocking.Another kind of deblocking mode is emergent deblocking, and direct upper lifting pipe post is cut off the shear pin that is connected between J-shaped hook and the central tube, realization packer deblocking.During the normal deblocking of the utility model, tubing string is not subjected to extra deblocking power, so deblocking power is irrelevant with the operating pressure of being born.

The utility model has the advantages that: 1. apparatus structure compactness, action are accurately. 2. setting reliable, deblocking Convenient. 3. deblocking power is irrelevant with the operating pressure of bearing.

Claims

1. packer, comprise formations such as (descending) joint, slips, packing element, brake pad, joint ring, it is characterized in that: central tube (2) upper end connects top connection (1), successively suit self-locking mechanism assembly, upper slips assembly, upper cone assembly, packing element, lower cone assembly, lower slips assembly and lower contact downwards;

Wherein: the self-locking mechanism assembly is that pressure cap (3) is comprising spring (4) and is sleeved on top connection (1) and the central tube (2), is provided with jump ring (5) between pressure cap (3) and central tube (2); The upper slips assembly is that central tube (2) is gone up suit upper slips seat (6), and upper slips seat (6) connects upper slips (7), and is provided with slips spring (8) and upper slips inner spring (9) in the chamber of upper slips (7); The upper cone assembly for be sleeved on cone support ring (10) between central tube (2) and the upper slips (7), jump ring (11) go up J-shaped hook (13) and shear pin (12) and interconnective upper cone (14), upper cone (15) get on the right track shear pin (16), glue tube base (17), screw (18), be included in the interior pressure ring (19) of glue tube base (17), seal assembly (20) formation; Packing element is served as reasons several sections and is sleeved on the long rubber bush (21) on the glue tube base (17), short rubber bush (23) and spacer ring (22) formation; Lining (25) is sleeved on the central tube (2), and its upper end is connected with the lower end of glue tube base (17) is repeatedly wrong, and lower cone (24) is sleeved on the lining (25); Lining (25) be provided with jump ring (33) bottom; The lower slips assembly is made up of the lower slips (26) and brake pad (29), the lower slips seat (31) that are sleeved on the lining (25); Wherein lower slips seat (31) directly is enclosed within lining (on 259, its outside connects brake pad (29), is provided with screw (27) and last gland (28) at an upper portion thereof; Its middle part is provided with down gland (32); Be provided with brake pad spring (30) in the chamber between brake pad (29) and lower slips (31); Its underpart is connected with the lower contact that is provided with lower railway shear pin (34) (35).

2. a kind of packer according to claim 1 is characterized in that: the outer wall of central tube (2) is the tube wall of a plurality of steps, which is provided with shear pin hole (40); Its middle part outer wall is the polygon tube wall (41) that four planes are arranged.

3. a kind of packer according to claim 1 is characterized in that: go up J-shaped hook (13) and be provided with shear pin hole (42), have J-shaped groove (43) on its tube wall, form uniform groove continuously at cylindrical 360 degree.

4. a kind of packer according to claim 1 is characterized in that: the top of upper cone (14) is a conehead (44); Upper cone (14) is provided with six vertically to the vertical slot (45) of its underpart.

5. a kind of packer according to claim 1 is characterized in that: seal assembly (20) is made of steel body (46) clamping joint ring (47) and support ring (48).