CN2906045Y - Packer - Google Patents

Abstract

Disclosed is a packer characterized in that the rubber cylinder expands under the pressure from the oil pipe to seal the annular space of the tubing and casing. The pressure inside the rubber cylinder assembly chamber remains unchanged under the effect of a check valve and the packer is anchored on a tube all along. The busywork being required for next time, the casing string is raised and the deblocking ring is cut off. In this case, the thimble will move upward with the casing string and force the check valve to open, the pressure inside the rubber cylinder will be released, the rubber cylinder will shrink; the packer will be unblocked and the casing string can be retrieved. The rubber cylinder assembly, after expansion, will firmly attached to the casing inner wall, and sealed to the annular spaces of the tubing and casing. The anchorage force between the rubber cylinder and the casing pipe is strong enough to prevent relative movement, so firm packing is ensured. Without slips, the rubber cylinder assembly will not cause damage to the casing pipe and has good sealing effect. Deblocking of the packer is realized via cutting off the shearing ring and the force applied thereupon can be determined according to actual demands, the deblocking is reliable. The utility model has the advantages of that no pipe string weight packing is needed; the rod and the tube avoid bend and partial wear; no limitation is placed upon the level of the packer and the multiple completion packer is allowed in one oil well.

Description

Packer

One, technical field

The utility model is the laminated distributor under well oil tool of oil field oil recovery usefulness, is a kind of packer.Belong to engineering goods.

Two, background technology

Implement layering card water blockoff oil recovery technique, envelope is fallen high aquifer, is the effective way that the control well water rises.Layering card water blockoff will adopt packer, existing packer kind is more, packer in every mouthful of well must adopt the packer of one-level band slips, play support tube column, as Y221, Y211 etc. all is slips type packer, this class slips type packer set makes the tubing string that supports that sleeve pipe generation plastic strain could be firm by the high rigidity slips on the packer, and packing element sealing tube post weight compression packing element is realized.Therefore, the packer that can satisfy oil-separating layer at present damages sleeve pipe easily, causes drilling pipe bending, rod and tube partial-wear occurs, and packer glides, problems such as the low and deblocking difficulty of success rate.

Three, summary of the invention

The purpose of this utility model is a kind of packer of design, does not need tubing string weight seat envelope, does not damage sleeve pipe, and good airproof performance supports reliably, can multistagely use.

The purpose of this utility model is achieved in that the packing element assembly is arranged at the top connection bottom, packing element assembly bottom connects with single current valve body top, ball-and-seat, thimble are installed in the single current valve body, the single current valve body lower portion is cut ring set top with deblocking and is connected, interior pipe top connects with top connection is inner down, packing element assembly, single current valve body, deblocking are cut annulate shaft and are sleeved on outside the interior pipe, deblocking is cut annulate shaft and is cut between the ring set at interior pipe and deblocking, deblocking is cut ring set and is contained in deblocking and cuts on the annulate shaft, interior pipe bottom connects with the retaining joint, and deblocking is cut the ring set bottom and connected with lower contact.Constant pressure arrangement is installed in packing element assembly bottom.Deblocking is cut ring can be made into the pin shape.

The beneficial effects of the utility model are: suppress be honored as a queen packing element assembly expansion of seat, be close to and seal up oil casing annular space on the internal surface of sleeve pipe, enough big anchorage force is arranged between packing element assembly and the sleeve pipe, make between packer and the sleeve pipe and can not produce relative motion, therefore seat secures solid, because the packing element assembly does not have slips, so do not damage sleeve pipe, good airproof performance.Under the effect of ball-and-seat, after not suppressing, packing element assembly chamber pressure remains unchanged, and packing element can not shrink, and packer is anchored on the sleeve pipe all the time.Deblocking realizes that by cutting off ring or pin the shearing force size can be determined as requested, so deblocking is reliable.Do not need tubing string weight seat envelope, do not have the crooked eccentric wear problem of rod tube, packer progression is unrestricted in the same well, can multistagely use, and layering quantity is many.

Four, description of drawings

Accompanying drawing is the assembling drawing of the utility model embodiment.

Five, the specific embodiment

Below in conjunction with accompanying drawing embodiment of the present utility model is described.

Among the figure: the 1st, top connection, the 2nd, the packing element assembly, the 3rd, interior pipe, the 4th, constant pressure arrangement, the 5th, ball-and-seat, the 6th, thimble, the 7th, the single current valve body, the 8th, deblocking is cut annulate shaft, and the 9th, deblocking is cut ring, and the 10th, deblocking is cut ring set, and the 11st, retaining connects, and the 12nd, lower contact.1 time outside of top connection connects with packing element assembly 2 tops, packing element assembly 2 bottoms connect with single current valve body 7 tops, ball-and-seat 5, thimble 6 are installed in the single current valve body 7, single current valve body 7 bottoms are cut ring set 10 tops with deblocking and are connected, 1 time inner connection of interior pipe 3 tops and top connection, packing element assembly 2, single current valve body 7, deblocking are cut annulate shaft 8 and are sleeved on outside the interior pipe 3, deblocking is cut annulate shaft 8 and is cut between the ring set 10 at interior pipe 3 and deblocking, deblocking is cut ring 9 and is sleeved on deblocking and cuts on the annulate shaft 8, interior pipe 3 bottoms connect with retaining joint 11, and deblocking is cut ring set 10 bottoms and connected with lower contact 12.Constant pressure arrangement 4 is installed in packing element assembly 2 bottoms.Deblocking is cut ring 9 can be made into the pin shape.

The utility model is with the design attitude in the oil well casing under the tubing string, when going into the well under the effect of constant pressure arrangement 4, the packing element chamber pressure is low, packing element is not expanded, after projected depth, suppress in oil pipe down, pressure enters through the pressure transmission hole of interior pipe 3, through ball-and-seat 5, outer wall along interior pipe 3 reaches in the packing element assembly 2, makes the packing element expansion, seals up oil casing annular space, and be anchored on the sleeve pipe, after not suppressing, under the effect of ball-and-seat 5, packing element assembly 2 chamber pressures remain unchanged, packing element can not shrink, and packer is anchored on the sleeve pipe all the time.Workover treatment next time is when needing deblocking, the upper lifting pipe post, and pipe 3 in driving, retaining joint 11 are up, cut off deblocking and cut ring (or pin) 9, deblocking is cut annulate shaft 8, thimble 6 in company with up, and thimble 6 backs down the valve ball of ball-and-seat 5, and the pressure in the packing element discharges, packing element shrinks, the packer deblocking, and tubing string can propose.

Packing element assembly 2 tops can not connect with 1 time outside of top connection yet, and connect with interior pipe 3 tops.

Claims (3)

1, a kind of packer, packing element assembly (2) is arranged, it is characterized in that: packing element assembly (2) is arranged at top connection (1) bottom, packing element assembly (2) bottom connects with single current valve body (7) top, ball-and-seat (5) is installed in the single current valve body (7), thimble (6), single current valve body (7) bottom is cut ring set (10) top with deblocking and is connected, interior pipe (3) top connects with top connection (1) is inner down, packing element assembly (2), single current valve body (7), deblocking is cut annulate shaft (8) and is sleeved on outside the interior pipe (3), deblocking is cut annulate shaft (8) and is cut between the ring set (10) at interior pipe (3) and deblocking, deblocking is cut ring (9) and is sleeved on deblocking and cuts on the annulate shaft (8), interior pipe (3) bottom connects with retaining joint (11), and deblocking is cut ring set (10) bottom and connected with lower contact (12).

2, packer according to claim 1 is characterized in that: constant pressure arrangement (4) is installed in packing element assembly (2) bottom.

3, packer according to claim 1 is characterized in that: deblocking is cut ring (9) can be made into the pin shape.

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