CN87215084U - Compression type small diameter sealing isolator - Google Patents

Abstract

The utility model discloses a compression type small diameter sealing isolator belonging to a downhole packer for the deformation well in oil field. The compression type small diameter sealing isolator solves the technical problem that an upper tubing of the existing packer can upend and rupture under the action of the improved differential pressure. The compression type small diameter sealing isolator is characterized in that an upper and a lower cone station annuluses are arranged on a central tubing and between an upper tubing and a lower tubing, the other end of the upper tubing and the lower tubing is provided with pyramids separately matched with an umbrella bore in an upper and a lower spacing ring bodies. The compression type small diameter sealing isolator is composed of an upper joint, a lower joint, an adjusting ring, the upper spacing ring, the lower spacing ring, the upper tubing, the lower tubing, a central tube, the central tubing, a clamp spring ring, a bearing joint, a working barrel, an upper piston, a lower piston, a screw cap and a sealing member. The compression type small diameter sealing isolator has the advantages of large bearing differential pressure, good packing performance and long time frame, and the tubing can not upend and rupture.

Description

Compression type small diameter sealing isolator

A kind ofly be used for casing deformation well down-hole compression pony packer on the oil field.

Casing deformation well increases along with the prolongation of development time on the oil field, the approaching edge of scrapping of well that the distortion that has is serious.How to make the well that is about to scrap also can carry out water filling, water blockoff work, accomplish twice laid, need pony packer (external diameter is the 95-100 millimeter) packing.The now common differential 451-10 type pony packer that adopts, the loss pressure reduction of borrowing water to chew guarantees the sealing of packer, and needing loss pressure reduction be 5-7 MPa, and this kind packer can only be applied on the water injection well about 1 year application life simultaneously.In addition, the compression pony packer is arranged also, it adopts YS type packing element, and it is low that this kind packer bears pressure reduction, and pressure reduction then produces phenomenons such as the packing element turnup breaks greater than 7 MPa.Problem based on prior art exists proposes the design.

The purpose of this utility model: for overcoming the deficiency that above-mentioned prior art exists, design the frustum ring body and support the compression packing element, i.e. compression pony packer, this packer has overcome the deficiency of above-mentioned packer, is advanced on technical performance.

Figure is that the compression pony packer partly cuts open configuration diagram: upper and lower joint ［ 1,25 ］, adjustable ring ［ 2,24 ］, spacer ring ［ 3 ］, upper and lower packing element ［ 4 ］, central tube ［ 5 ］, upper and lower frustum ring body ［ 6,11 ］, garter spring ［ 7 ］, fixedly pinning ［ 8 ］, middle packing element ［ 9 ］, jump ring ring ［ 10,21 ］, pressure-bearing joint ［ 12 ］, " O " type packing ［ 13,14,17 ］, release pin ［ 15 ］, seating nipple ［ 16 ］, upper and lower piston ［ 18,20 ］ release pin ［ 19 ］, constitute every circlip ［ 22 ］, nut ［ 23 ］.

Prior art is the tubing string that many members consist of, the utility model is improved in the prior art feature base, make its technical performance that raising arranged, its improved technical characterictic is: be set up frustum ring body ［ 6 ］, lower frustum ring body ［ 11 ］ between middle packing element ［ 9 ］ and upper and lower packing element ［ 4 ］, make its frustum ring body small end respectively with upper and lower packing element ［ 4 ］ end contact, large end face contacts with middle packing element ［ 9 ］ both ends of the surface. Near its bottom cannelure is arranged in upper frustum ring body ［ 6 ］ side, at central tube ［ 5 ］ therewith corresponding cannelure is arranged, and the cannelure on upper frustum ring body has four holes, fixedly the head of pinning ［ 8 ］ is stuck in the cannelure of central tube ［ 5 ］, by garter spring hoop jail, frustum ring body ［ 6 ］ is connected with central tube ［ 5 ］. On lower frustum ring body ［ 11 ］ and central tube ［ 5 ］ contact-making surface, it is the rectangular loop groove that there is an axial cross section inherence, hole of lower frustum ring body ［ 11 ］ near big end place, with it relative, at the outer surface of central tube ［ 5 ］ axial cross section being arranged is the cannelure of right angled triangle, the right-angle side of this cannelure axial cross section is vertical with axis, and hypotenuse up; Be bumped into by right-angled trapezium jump ring ring ［ 10 ］ in two cannelures of cooperation, lower frustum ring body ［ 11 ］ is connected on the central tube ［ 5 ］; One male cone (strobilus masculinus) is all arranged at the top of the upper packing element that the design adopts and the bottom of lower rubber cylinder, cooperates with upper and lower spacer ring ［ 3 ］ body inner conical surface respectively.

The packer of structurally taking above-mentioned measure is by after design is down in the well, highly pressurised liquid is from the ground injection string, hydrophthalmia ［ 26 ］ on central tube ［ 5 ］ enters and cuts off release pin ［ 15 ］ in the plunger shaft, fixing pinning ［ 8 ］, it is up to promote pressure-bearing joint ［ 12 ］, the compression packing element makes its diameter become big, on this moment, following frustum ring body ［ 6,11 ］ on awl is gone into respectively, in the lower rubber cylinder ［ 4 ］, its centering packing element ［ 9 ］ that swells is risen support protective effect, even pressure reduction reaches 17MPa, three packing elements can turnup, break, packing oil casing annular space well still; Seating nipple this moment ［ 16 ］ is with in its up process, and the inboard axial cross section in its underpart is that jagged cannelure is stuck on the jump ring ring ［ 21 ］, has realized no extraneous pressure reduction and self-locking.

Advantage of the present utility model: this packer not only is applicable to the well of casing deformation, also is suitable for oil well; It is big to bear pressure reduction, can bear 15-17MPa pressure reduction still not turnup with break; Stability is good, and the packing time is long, is original 3 times.Packer need not extraneous pressure reduction, but self-locking.

Claims (1)

1, a kind of distortion well down-hole compression pony packer that is used on the oil field, by upper and lower joint [1,25], adjustable ring [2,24], upper and lower spacer ring [3], upper and lower packing element [4], central tube [5], middle packing element [9], jump ring ring [21], pressure-bearing joint [12], " O " type packing [13,14,17], release pin [15], seating nipple [16], upper and lower piston [18,20], release pin [19], constitute every circlip [22], nut [23], it is characterized in that:

1) between middle packing element [9] and upper and lower packing element [4], puts frustum ring body [6], following frustum ring body [11];

2) between last frustum ring body [6] and central tube [5], the relative engagement groove is arranged, with fixedly pinning [8] connection, on garter spring [7] hoop;

3) between frustum ring body [11] and central tube [5] the relative engagement groove being arranged down, inserts jump ring ring [10] is arranged in the groove;

4) in upper and lower spacer ring [3] body taper hole is arranged, with the cone match on the upper and lower packing element body [4];

5) upward the small end of frustum ring body [6], following frustum ring body [11] contacts with upper and lower packing element [4] large end face respectively, and the large end face of upper and lower frustum ring body [6,11] contacts with middle packing element [9] both ends of the surface;

6) the triangle annular groove on the central tube [5] is the right-angled triangle annular groove, and hypotenuse up.