CN2467788Y

CN2467788Y - Cleanable well packer

Info

Publication number: CN2467788Y
Application number: CN 01209818
Authority: CN
Inventors: 张宝有
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-02-13
Filing date: 2001-02-13
Publication date: 2001-12-26
Anticipated expiration: 2011-02-13

Abstract

The utility model relates to a packer in a casing tube for the layered water distribution of an oil field, which belongs to the field of a hydraulic compression-type well-washing packer. The packer solves the problems that the seal sitting of the compression-type well-washing packer needs an oil tube column to seal, the seal is not good after the well is washed for multiple times, and the bearing capacity is not strong. The utility model is characterized in that a seal sitting mechanism is provided with a sealing air cavity which can be moved and can be compressed. The utility model is suitable for the use of the layered water distribution of an oilfield water injection well, can avoid to install a death water faucet, and reduces the testing work load of a throwing and salvaging packer.

Description

A kind of washing well packer

The utility model relates to the interior packer of sleeve pipe that the layering water distribution of a kind of oil field is used, and belongs to waterpower compression washing well packer.

At present, the washing well packer that uses on the oil field, connect with injection well downhole flow regulator, suppress when setting at the washing well packer, casing string must seal, could form pressure reduction in the top and bottom that set piston of washing well packer, thrust is compressed packing element and is realized setting in the generation, and this just requires in the casing string mouth of must feigning death of the blanking plug in the injection well downhole flow regulator, blanking plug is pulled out behind the washing well packer setting again, change cock, drop in the injection well downhole flow regulator in the casing string, just can carry out water filling, like this, promptly increase workload, influenced water filling again; In addition, " protruding " type via hole packing on the well-flushing piston of this washing well packer easily stung the application life that badly influences the washing well packer by water when well-flushing, and this washing well packer is to deposit the packing element seal and pressure bearing, and bearing capacity is not strong.

The purpose of this utility model is exactly that the seal that does not need the casing string sealing can produce pressure reduction, well-flushing piston when providing a kind of setting at above-mentioned the deficiencies in the prior art is difficult for the waterpower compression washing well packer bad by the water thorn, that bearing capacity is strong.

The utility model reaches by the following technical programs: this washing well packer comprises top connection, the well-flushing piston bush, the well-flushing piston, inner central tube, exterior central tube, the pressure-bearing joint, spacer ring, promote spacer ring, packing element, set shear pin, clip spring seat, jump ring, the deblocking shear pin, cylinder jacket, set piston bush, overcoat, lower contact, it is characterized in that: have thread connection between the inner central tube of flowing hole and the clip spring seat, and by " O " type packing_seal, the outside cylinder jacket that has the card tooth that is with in clip spring seat upper end, and by " O " type packing_seal, be inserted with in the cylinder jacket lower end and set piston bush, and be equipped with sealed packing between the two, the inside and outside wall that sets piston bush respectively with inner central tube, be equipped with sealed packing between the overcoat, cylinder jacket with set piston bush and can be made into one.

Above-mentioned washing well packer, the via hole packing cross section on its well-flushing piston is " O " type, and it is built-in with steel frame; The sulfuration of described washing well packing element end has the copper umbrella.

The utility model has the following advantages than prior art: because cylinder jacket, set piston bush, inner central tube and clip spring seat all are equipped with sealed packing each other, thereby form one compressible, annular seal space movably, even tubing string internal and external pressure balance, as long as the tubing string internal pressure is greater than the pressure of sealing air in the annular seal space with when setting the pressure that shear pin cuts off, cylinder jacket and set piston bush and can cut off and set shear pin and move the compression packing element on together and realize setting, thereby do not need the casing string sealing can set the washing well packer, reduced a large amount of test pulling work; Because " O " type via hole packing of steel frame is arranged in the employing of the sealing on the well-flushing piston, strengthened the intensity of its sealed packing again, thus difficult bad when the well-flushing piston moves via hole by the water under high pressure thorn, the sealing and the application life thereof of having improved the well-flushing piston; In addition, its packing element end sulfuration has the copper umbrella, makes above-mentioned washing well packer bearing capacity strengthen.

Fig. 1 is a structure chart of the present utility model.

Below in conjunction with accompanying drawing the utility model is described further: by washing well packer shown in Figure 1, the top connection 1 that has flowing hole 30 is threaded with inner central tube 3 upper ends that have flowing hole 34, top connection 1 and the outside, exterior central tube 12 upper end that has a circulation port 31 are with well-flushing piston 4 jointly, " O " type packing 6 of well-flushing piston 4 built-in steel frames, and the intrinsic cap 5 that is equipped with in its lower end, top connection 1 and the well-flushing piston 4 outer well-flushing piston bushs 2 that are with, well-flushing piston bush 2 and top connection 1 thread connection, outside, exterior central tube 12 lower end is with pressure-bearing joint 8 successively, the packing element 9 of band umbrella, spacer ring 10, packing element 11, the promotion spacer ring 13 of band circulation port 33, wherein pressure-bearing joint 8 and exterior central tube 12 thread connection, " " is housed between the two " type packing 7; thread connection between inner central tube 3 lower ends and the clip spring seat 15; and by " O " type packing_seal; outside, clip spring seat 15 upper end is with the cylinder jacket 19 that promotes spacer ring 13 and have the card tooth respectively; wherein promote spacer ring 13 and be fixed on the clip spring seat 15 by setting shear pin 14; clip spring seat 15 and cylinder jacket 19 are by " O " type packing_seal, clip spring seat 15 lower ends are with jump ring 17, and it is spacing by retaining cap 18, retaining cap 18 is fixed on the clip spring seat 15 by deblocking shear pin 16, cylinder jacket 19 outsides are with overcoat 21, be inserted with in cylinder jacket 19 lower ends and set piston bush 20, and be equipped with sealed packing between the two, the inside and outside wall that sets piston bush 20 respectively with inner central tube 3, be equipped with sealed packing between the overcoat 21, overcoat 21 and inner central tube 3 lower ends respectively with lower contact 22 thread connection; Cylinder jacket 19, set between piston bush 20, clip spring seat 15 and the inner central tube 3 and to form removable, a compressible sealing air chamber.

During actual the use, with oil pipe this instrument is sent into the precalculated position, down-hole, inject highly pressurised liquid in the oil pipe, highly pressurised liquid acts on the bottom surface that sets piston bush 20 by the flowing hole on the inner central tube 3 34, highly pressurised liquid acts on the bottom surface of cylinder jacket 19 by the gap between the cock hole on the injection well downhole flow regulator and overcoat 21 and the cylinder jacket 19 simultaneously, they promote together to move on the cylinder jacket 19 to cut off and promote to set shear pin 14 on the spacer ring 13, compress packing element (9 simultaneously, 11), make its expansion, at this moment the card tooth on jump ring 17 and the cylinder jacket 19 locks together, prevent that cylinder jacket 19 from returning, realized packer setting; When stopping annotating the back well-flushing, pressure release in the oil pipe, annular space between sleeve pipe and oil pipe injects flushing fluid, flushing fluid promotes to move on well-flushing piston 4 and built-in steel frame " O " the type packing 6 thereof, open circulation canal, make flushing fluid on exterior central tube 12 circulation port 31 and in annular space between the exterior central tube (3,12), from the circulation port 32 of exterior central tube 12 lower ends, promote empty 33 outflows of circulation on the spacer ring 13, reach the purpose of well-flushing; When stopping washing water filling, the water under high pressure in the oil pipe acts on the well-flushing piston 4 by the flowing hole in the top connection 1 30, promotes 4 times horizontal resets of well-flushing piston, can carry out the layering water distribution after reaching sealing; During deblocking, on carry tubing string, when the frictional force of packing element (9,11) and internal surface of sleeve pipe during, cut off shear pin 16 greater than the shearing resistance of deblocking shear pin 16, reach the purpose of deblocking.

Claims

1, a kind of washing well packer, comprise top connection (1), well-flushing piston bush (2), well-flushing piston (4), inner central tube (3), exterior central tube (12), pressure-bearing joint (8), spacer ring (10), set shear pin (14), promote spacer ring (13), clip spring seat (15), jump ring (17), deblocking shear pin (16), cylinder jacket (19), set piston bush (20), overcoat (21), lower contact (22), it is characterized in that: have thread connection between inner central tube (3) lower end of flowing hole (34) and the clip spring seat (15), and by " O " type packing_seal, the outside cylinder jacket (19) that has the card tooth that is with in clip spring seat (15) upper end, and by " O " type packing_seal, be inserted with in cylinder jacket (19) lower end and set piston bush (20), and be equipped with sealed packing between the two, the inside and outside wall that sets piston bush (20) respectively with inner central tube (3), overcoat is equipped with sealed packing between (21).

2, washing well packer according to claim 1 is characterized in that: sealed packing (6) inside on the well-flushing piston (4) is equipped with steel frame, and its cross section is " O " type.

3, washing well packer according to claim 1 is characterized in that: the sulfuration of packing element (9) end has the copper umbrella.