CN207470150U - A kind of low deblocking power minor diameter can not well-flushing compression packer - Google Patents

Abstract

The utility model belong to a kind of low deblocking power minor diameter can not well-flushing compression packer, which includes discharging using double release plungers, and the pressure of compression packer packing element is big, and sealing is more reliable；Packing element uses stainless steel protection umbrella to make packing element, and when bearing pressure difference, shoulder protrudes to fall to fill in; the thrust that the top-down pressure differential born using double dummy pistons balance packing element is generated; so as to reduce the deblocking power of deblocking pin, packer is made to be easier to unseal.The utility model employs the design of double release plungers, packing element vulcanization stainless steel protection umbrella and double compensating cylinders; make conventional packer is extremely difficult to cut pin deblocking, tubing string plays the phenomenon that out not causing to injure again to casing deformation well or casing amendment reinforcing well and is addressed.

Description

A kind of low deblocking power minor diameter can not well-flushing compression packer

Technical field

The utility model belongs to Water in Water Shutoff in Oil Field technical field of tools more particularly to a kind of low deblocking power minor diameter can not well-flushing Compression

Formula packer.

Background technology

At present, sleeve in oil field deformation well or casing amendment reinforcing well oil well delamination water blockoff or well seperated layer water injection use normal Pony packer is advised, since packer diameter of cylinder becomes smaller, the thrust that packing element is born when bearing interlayer pressure difference increases Big several times since the thrust that the packing element of conventional compact formula packer is born is acted directly on deblocking pin, cause to solve The deblocking power of offset nail is very big, it is extremely difficult to cut pin deblocking, tubing string rises out does not reinforce well to casing deformation well or casing amendment It causes to injure again.

Invention content

The technical issues of in order to solve to deposit in background technology, it is not washable that the utility model provides a kind of low deblocking power minor diameter Well compression packer, to solve the problems mentioned in the above background technology.

The technical issues of the utility model solves is realized using following technical scheme：Low deblocking power minor diameter is not washable Well compression packer includes top connection, the upper housing of top connection lower part outer wall thread connection, and upper housing lower end connects upper housing, on Housing lower end is connected with pressure-bearing set, and top connection lower inner wall is threadedly coupled the inner thread of central tube, central tube and lower contact Connection, the interior clamp spring that is equipped with of ring cavity between upper housing and central tube are hung, and clamp spring is hung and clamp spring is equipped in the slot of outer wall, under clamp spring is hung For portion's inner wall by unsealing the upper interstage sleeve of shear pin connection, upper interstage sleeve inner wall is connected with exterior central tube, clamp spring hang the upper housing of lower section with it is outer Dummy piston is installed, upper pressure-bearing is covered in the ring cavity between the upper housing and exterior central tube of top in the ring cavity between central tube Section and lower dummy piston be installed on lower dummy piston, saves and is threadedly coupled under section and lower dummy piston on lower dummy piston, above hold Side packing element, spacer ring, middle packing element, lower pressure-bearing set, lower pressure-bearing set and exterior central tube spiral shell are cased on exterior central tube below pressing sleeve successively Line connects, and lower pressure-bearing set outside is fixedly connected with the outer wall thread company of lower housing, lower housing lower end and lower contact by discharging shear pin It connects, upper release plunger and release plunger is equipped in lower ring cavity between housing and exterior central tube, release plunger is connected in top Seal stopper ring, seal stopper ring lower section are equipped with fixed piston.

The beneficial effects of the utility model are：The utility model employs double release plungers and solves because tool diameter reduces What is generated suppresses the problem of promotion reduces, and ensures that packing element reliably seals；It is to solve packing element pressure that packing element, which has vulcanized stainless steel protection umbrella, Shoulder, which protrudes, during contracting falls to fill in, and influences sealing effect；Purpose using double compensating cylinders is that balance packing element generates under upper differential pressure action Downward thrust, be effectively protected deblocking pin, with it is relatively low deblocking power can unseal, avoid because deblocking pin setting The excessive extremely difficult cutting pin deblocking of diameter, tubing string rise not come out and cause to hinder again to casing deformation well or casing amendment reinforcing well Evil.

Description of the drawings

Fig. 1 is the structure diagram of the utility model.

In figure：1- top connections, the upper housings of 2-, 3- central tubes, 4- clamp springs, 5- clamp springs are hung, the upper interstage sleeves of 6-, 7- deblocking shear pins, The upper dummy pistons of 8-, housing in 9-, 10- exterior central tubes save under 11- on dummy piston, save under dummy piston under 12-, held on 13- Pressing sleeve, 14- sides packing element, 15- spacer rings, packing element in 16-, pressure-bearing set under 17-, 18- release shear pins, the upper release plungers of 19-, 20- are close Block ring, 21- fixed pistons, housing under 22-, release plunger under 23-, 24- lower contacts, stainless steel plate under 25-.

Specific embodiment

The utility model is described further below in conjunction with attached drawing：

Low deblocking power minor diameter can not well-flushing compression packer include top connection 1,1 lower part outer wall thread connection of top connection Upper housing, 2, housing 9 in upper 2 lower end of housing connection, middle 9 lower end of housing is connected with pressure-bearing set 13,1 lower inner wall spiral shell of top connection Line connects central tube 3, and central tube 3 connect with the inner thread of lower contact 24, set in the ring cavity between upper housing 2 and central tube 3 There is clamp spring to hang 5, clamp spring is hung and is equipped with clamp spring 4 in the slot of 5 outer walls, and clamp spring hangs 5 lower inner walls by unsealing the upper interstage sleeve of the connection of shear pin 7 6, upper 6 inner wall of interstage sleeve is connected with exterior central tube 10, stops two dummy pistons using the shoulder on exterior central tube 10 and upper interstage sleeve 6 Balance is completed, has balanced the immense pressure of the pressure difference on packing element, and suppress rear clamp spring 4 and hung over upper housing 2 and prevented together Only packing element retroversion is allowed to keep excellent sealing, and deblocking shear pin 7 is made to be in low load condition always.Clamp spring hangs the upper housing 2 of 5 lower sections Upper dummy piston 8, the middle housing 9 and exterior central tube 10 of upper 13 top of pressure-bearing set are installed in the ring cavity between exterior central tube 10 Between ring cavity in be equipped on lower dummy piston under section 11 and lower dummy piston and save 12, section 11 and lower balance on lower dummy piston Section 12 is threadedly coupled under piston, is provided in dummy piston 8 and middle housing 9 and is provided on lower dummy piston in upper housing 2 The dummy piston of 12 composition of section under section 11 and lower dummy piston, there is provided two counter balance pockets to reach double equilibrium functions, it is therefore an objective to really Guarantor unseals shear pin 7 on packing element and is not cut under differential pressure action.It is cased with side successively on the exterior central tube 10 of upper 13 lower section of pressure-bearing set Packing element 14, spacer ring 15, middle packing element 16, lower pressure-bearing set 17, lower pressure-bearing set 17 are threadedly coupled with exterior central tube 10, outside lower pressure-bearing set 17 Side is fixedly connected with lower housing 22 by discharging shear pin 18, and lower 22 lower end of housing is connect with the outer wall thread of lower contact 24, lower housing Upper release plunger 19 and lower release plunger 23 are equipped in ring cavity between 22 and exterior central tube 10, is connected in lower 23 top of release plunger Seal stopper ring 20 is connected to, 20 lower section of seal stopper ring is equipped with fixed piston 21, and fixed piston 21 is threadedly coupled with central tube 3.It is fixed Inlet opening is set on the central tube 3 of the top of piston 21, thus inlet opening is entered by fixed piston 21 and upper liquid when suppressing In the admission chamber that release plunger 19 forms, upper release plunger 19 to be pushed to move ahead, move ahead jointly with lower release plunger 23, double promotions Purpose be to make up to generate, double promotions under pressure-bearing set 17 insufficient to the thrust of packing element due to the diminution of lower 23 area of release plunger It cuts release shear pin 18 and compresses packing element, make packing element and the swollen envelope of internal surface of sleeve pipe, achieve the purpose that excellent sealing.

Packing element 14 outer surface of upper in side is covered with stainless steel plate 25.25 opposite side packing element 14 of stainless steel plate plays the work of umbrella With during being compressed due to packing element, the compression of packing element shoulder is easily generated in the both ends of packing element and the gap of casing, and plug is existing As partial rubber, which is filled in gap, influences packing element sealing, in this regard, the shoulder of the side packing element 14 of both sides has been vulcanized stainless steel plate 25, effectively prevent the generation of this phenomenon.

There are three links when in use for packer：

1. central tube water filling is suppressed packer setting：This packer in normal work, suppress in central tube 3 by water filling, liquid Body pushes upper release plunger 19 and lower 23 uplink of release plunger, this power to be applied to down hold by 3 lower part Liang Ge holes feed liquor of central tube On pressing sleeve 17 and exterior central tube 10, infer that release shear pin 18 continues to move ahead, compression packing element makes the swollen envelope of packer.At this point, swollen envelope The forward buttless thread for having hung over upper housing top 2 of packer clamp spring 4 on.

2. the tool set bears interlayer fluctuation pressure difference in underground packing element：It is huge when tool bears pressure difference in well Downward thrust push the packing element of swollen envelope, this power is made to act on deblocking shear pin 7, if without other measures, and The less than normal of 7 diameter design of shear pin is unsealed, just there is the possibility being pulled off.But at the same time, the inlet opening on upper housing 2 and China and foreign countries Inlet opening also feed liquor on set 9, pushes two dummy piston uplinks, withstands on 10 boss of interstage sleeve 6 and exterior central tube respectively respectively On, pin is protected, balances pressure difference thrust downward caused by packing element, is effectively protected deblocking shear pin 7.

3. tubing string is risen outside well：During lift pipe string, due to being provided with the protection of two compensating cylinders, the diameter of shear pin 7 is unsealed Design it is just smaller, during such upper lifting pipe post, it is easy to just cut pin and unseal and propose outside well.So as to significantly increase Tool and is unlikely to the secondary damage that Ka Jing causes well in the adaptability of underground.In addition, it is also alleviated to ground operating equipment Work load.

The utility model employs release plunger 19 and lower release plunger 23 and double promotions is carried out to packing element, side packing element 14 Shoulder has vulcanized stainless steel plate 25, and there is provided save 12 groups under section 11, lower dummy piston on upper dummy piston 8 and lower dummy piston Into lower dummy piston.By above-mentioned setting, realize and blocked up in sleeve in oil field deformation well or casing amendment reinforcing well oil well delamination In use, in the case where bearing interlayer pressure difference thrust increase several times, deblocking shear pin 7 also can be low negative for water or well seperated layer water injection It works in the case of lotus.It avoids since the upper pressure difference thrust that the packing element of conventional compact formula packer is born directly acts on On deblocking pin 7, the deblocking power design for causing deblocking pin 7 is very big, it is extremely difficult to cut the phenomenon that pin unseals, it is therefore prevented that Tubing string rises not come out and causes to injure again to casing deformation well or casing amendment reinforcing well.

Claims (2)

1. a kind of low deblocking power minor diameter can not well-flushing compression packer, including top connection (1), top connection (1) lower part outer wall Housing (2) in threaded connection, housing (9) in upper housing (2) lower end connection, middle housing (9) lower end are connected with pressure-bearing set (13), Top connection (1) lower inner wall is threadedly coupled central tube (3), and central tube (3) is connect with the inner thread of lower contact (24), upper housing (2) clamp spring is equipped in the ring cavity between central tube (3) and hangs (5), clamp spring is hung in the slot of (5) outer wall and is equipped with clamp spring (4), clamp spring It hangs (5) lower inner wall and is connected with exterior central tube (10) by unsealing interstage sleeve (6) in shear pin (7) connection, upper interstage sleeve (6) inner wall, block Spring is hung in the ring cavity between upper housing (2) and exterior central tube (10) below (5) and is equipped with dummy piston (8), upper pressure-bearing set (13) it is equipped in the ring cavity between middle housing (9) and exterior central tube (10) above on lower dummy piston and saves (11) and lower balance (12) are saved under piston, (12) threaded connection, upper pressure-bearing set (13) lower section are saved under section (11) and lower dummy piston on lower dummy piston Exterior central tube (10) on be cased with side packing element (14), spacer ring (15), middle packing element (16), lower pressure-bearing set (17), lower pressure-bearing set successively (17) it is threadedly coupled with exterior central tube (10), lower housing is fixedly connected with by discharging shear pin (18) on the outside of lower pressure-bearing set (17) (22), lower housing (22) lower end is connect with the outer wall thread of lower contact (24), between lower housing (22) and exterior central tube (10) Upper release plunger (19) and lower release plunger (23) are equipped in ring cavity, seal stopper ring is connected in lower release plunger (23) top (20), fixed piston (21) is equipped with below seal stopper ring (20).

2. the low deblocking power minor diameter of one kind according to claim 1 can not well-flushing compression packer structure, feature exists In：Side packing element (14) outer surface of upper is covered with stainless steel plate (25).