CN2608679Y

CN2608679Y - Expansion type packer

Info

Publication number: CN2608679Y
Application number: CN 03239424
Authority: CN
Inventors: 杨朝杰
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-03-03
Filing date: 2003-03-03
Publication date: 2004-03-31
Anticipated expiration: 2013-03-03

Abstract

The utility model relates to an expansion excluder, pertaining to the oil filed affusion instrument, and comprises an upper contact, a main body, an upper pile casing sliding bush, a gel bed, an inner and an outer central tubes, a lower pile casing unblock bush, a well flushing valve, a lower contact and a one-way valve; a plurality of well flushing water holes are transversely arranged on the side face of the tube wall of the main body; an eccentric hole is longitudinally arranged in the tube wall of the main body between the adjacent two well flushing holes; a water flow hole is arranged in the center of the of the eccentric hole and a liquid flow hole is arranged at the bottom of the eccentric hole; a valve element spring set is arranged in the valve body and is fixed by the pressure cap; a pressure relief mandril is installed at the top of the valve body and is arranged in the eccentric hole; the main body is connected with the upper contact and restricts the valve body; the inner and outer central tubes are respectively connected with the crew threads in the inner wall of the main body; the upper pile casing sliding bush and the lower pile casing unblock bush are respectively connected with the two ends of the gel bed, and cover the top of the outer central tube; the upper pile casing sliding bush plugs in the inner cavity of the main body and is limited by the limit nail; the lower pile casing unblock bush is fixed with the outer central tube; the bottom end of the well flushing valve plugs in the inner cavity of the lower contact; the bottom end of the inner central tube is connected with lower contact by the screw threads.

Description

A kind of inflatable packer

Technical field: the utility model relates to a kind of inflatable packer, belongs to a kind of of oil-field flooding instrument.

Background technology: existing at present inflatable packer kind is a lot, and as K344=114, YC344=114 etc., but all there is very big shortcoming in they.The pressured differential expansion envelope of K344-114 is in case after the oil jacket pressure balance, packing element is regained, and does not reach the purpose of seperated layer water injection.The YC344-114 pressure reduction envelope that expands, after the oil jacket pressure balance, packing element is not regained, but water injection pressure fluctuation and when stopping annotating, and the pressure of high pressure zone easily makes next stage packer deblocking, and separating is honored as a queen will make the packer relatively difficulty of envelope that expands; During anti-flushing well, must make the packer deblocking, the bloated repeatedly envelope of packing element, deblocking shorten the packing element life-span.If reservoir sand impurity is more during deblocking, the deblocking bar is blocked, be difficult for deblocking, cause the accident, increase the oilfield exploitation cost, influence water filling and crude output, increase operating worker labour intensity.

Summary of the invention: the purpose of this utility model is exactly at above-mentioned the deficiencies in the prior art, and a kind of inflatable packer is provided, packing element withdrawal, packer blow-by problem when solving the oil jacket pressure balance; The fluctuation of solution water injection pressure, high pressure zone makes the problem of next stage packer deblocking during termination of pumping; Solve the problem of the necessary first deblocking packer of well-flushing; Solve packing element deblocking, the envelope that expands repeatedly, shorten the packing element problem in application life.

The technical solution of the utility model is: a kind of inflatable packer by top connection, main body, go up casing sliding sleeve, banking pin, packing element, inner central tube, exterior central tube, casing is separated big envelope, shear pin, flushing valve, step lower contact, valve body, spool, spring, pressure cap, is rushed down the bar that bears down on one and form down; Main body tube wall side laterally has a plurality of well-flushings water hole, in the main body tube wall between adjacent two well-flushing water holes, vertically have inclined to one side hole, the middle part, hole has the water hole that is communicated with the main body endoporus partially, the bottom, hole vertically has liquid pass hole downwards partially, and hole, liquid pass hole are not communicated with the well-flushing water hole partially; Insert in the valve body behind the valve core upper sleeve shock mount, fix with pressure cap, the valve body upper end is installed and is rushed down the bar that bears down on one, and with spiral marking connection, and inserts in the inclined to one side hole; Top connection and main body are to be threaded, and main body inner wall is that step and car have screw thread; Inner central tube, exterior central tube respectively with main body inner wall be threaded, go up the casing sliding sleeve, down casing separate big envelope respectively with the two ends of packing element being sleeved on after being threaded on the exterior central tube, last casing sliding sleeve insertion main body inner chamber, and fix with banking pin; Following casing deblocking is applied mechanically shear pin and is fixed with exterior central tube, and casing deblocking cover is up under the step limits of exterior central tube lower end; Flushing valve is sleeved on the inner central tube, and the flushing valve inner chamber is placed the pressure limiting spring, and flushing valve upper end car has a grade platform, holds down casing and separates big envelope, and insert in the step lower contact inner chamber flushing valve lower end; The inner central tube lower end has the back pressure hole, and inner central tube lower end and step lower contact are to be threaded.A kind of inflatable packer of using when this device can be used as well-flushing.

Above-mentioned a kind of inflatable packer, but the well-flushing water hole that has on the shutoff main body tube wall side.A kind of inflatable packer of using when this device can be used as well-flushing not.

The utility model compared with prior art has following advantage: 1, packer expands and is honored as a queen, and deblocking is not subjected to the influence of stratum interlayer pressure and water injection pressure, seals more reliable.2, during anti-flushing well, packing element is deblocking, the envelope that expands not, prolongs packing element application life.When expanding envelope, last casing sliding sleeve has the certain displacement amount, and it is stressed to reduce the packing element upper end, prolongation packer application life.3, there is the retaining platform exterior central tube lower end, and when packer expanded envelope, following casing deblocking overlapped up limited, shear pin be not subjected to expand envelope power size and cut off, make expand envelope, deblocking of packer more reliable.

Description of drawings: Fig. 1 is the structure chart that can be used for a kind of inflatable packer of well-flushing.Fig. 2 is a kind of inflatable packer structure chart when can be used for well-flushing not.

The specific embodiment: the utility model is done specific descriptions below in conjunction with accompanying drawing: referring to Fig. 1, a kind of inflatable packer by top connection 14, main body 1, go up casing sliding sleeve 3, banking pin 4, packing element 5, inner central tube 6, exterior central tube 7, casing is separated big envelope 8, shear pin 9, flushing valve 10, pressure limiting spring 11, step lower contact 13, is rushed down the bar 15 that bears down on one down, valve body 17, spool 18, spring 19, pressure cap 20 form; Main body 1 tube wall side laterally has a plurality of well-flushings water hole 2, vertically have inclined to one side hole in adjacent two well-flushing water holes in 2 main body 1 tube wall, the middle part, hole has the water hole 16 that is communicated with main body 1 endoporus partially, and the bottom, hole vertically has liquid pass hole downwards partially, and hole, liquid pass hole are not communicated with well-flushing water hole 2 partially; Pocketed springs 19 on the spool 18, insert in the valve body 17, and is fixing with pressure cap 20, and valve body 17 upper ends are installed and rushed down the bar 15 that bears down on one, and to be threaded, then valve body 17 are inserted in the inclined to one side hole; Main body 1 and top connection 14 to be being threaded, and limit the valve body 17 in the inclined to one side hole; Main body 1 inwall is that step and car have screw thread, inner central tube 6, exterior central tube 7 respectively with main body 1 inwall to be threaded; Last casing sliding sleeve 3, down casing is separated big envelope 8 respectively with after packing element 5 two ends are threaded, and is enclosed within on the exterior central tube 7, and last casing sliding sleeve 3 inserts main bodys 1 inner chamber, and fixes with banking pin 4; It is fixing with exterior central tube 7 that following casing is separated big envelope 8 usefulness shear pins 9; To separate big envelope 8 up for casing under the step limits of exterior central tube 7 lower ends; Flushing valve 10 is sleeved on the inner central tube 6, flushing valve 10 inner chambers are placed pressure limiting spring 11, and flushing valve 10 upper end cars have a grade platform, hold down casing and separate big envelope 8, when water filling, when upper strata hydraulic pressure during greater than lower floor's hydraulic pressure, pressure reduction has active force to shear pin 9, and shear pin 9 is cut off, at this moment, the water injection pressure that is entered by back pressure hole 12 makes flushing valve 10 upwards produce a power, cuts down the active force of upper and lower pressure reduction to shear pin 9, prevents that shear pin 9 from cutting off; Insert in the inner chamber of step lower contact 13 flushing valve 10 lower ends; Inner central tube 6 lower ends and step lower contact 13 are to be threaded, and inner central tube 6 lower ends have back pressure hole 12.A kind of inflatable packer of using when this device can be used as well-flushing.

During normal water filling, liquid backs down spool 18 through water hole 16, enters annular space between exterior central tube 7 and the packing element 5 through liquid pass hole, makes packing element 5 envelope that expands, even pressure oscillation or stop well, spool 18 seals under the effect of spring 19, and packing element 5 still expands and seals.During well-flushing, liquid is through the annular space between well-flushing water hole 2 and inner central tube 6 and the exterior central tube 7, back down flushing valve 10 and reach the well-flushing purpose, behind the well-flushing during normal water filling, pressure in pressure limiting spring 11 and the inner central tube 6 makes flushing valve 10 playback, during the operation lift pipe string, on carry oil pipe, packing element 5 is cut off shear pin 9 with the friction of sleeve pipe, following casing is separated big envelope 8 to lower slider, hermetic unit glides, packing element 5 chamber pressures are discharged, and packing element 5 is regained, and the upper lifting pipe post is easy, and be difficult for Ka Jing, save cost for oil production.

Referring to Fig. 2, in above-mentioned a kind of inflatable packer, but the well-flushing water hole 2 that has on the shutoff main body 1.A kind of inflatable packer of using when this device can be used as well-flushing not.

Claims

1, a kind of inflatable packer by top connection (14), main body (1), go up casing sliding sleeve (3), banking pin (4), packing element (5), inner central tube (6), exterior central tube (7), casing is separated big envelope (8), shear pin (9), flushing valve (10), pressure limiting spring (11), step lower contact (13), is rushed down the bar that bears down on one (15) down, valve body (17), spool (18), spring (19), pressure cap (20) form; It is characterized in that: main body (1) tube wall side laterally has a plurality of well-flushings water hole (2), vertically have inclined to one side hole in main body (1) tube wall between adjacent two well-flushing water holes (2), the middle part, hole has the water hole (16) that is communicated with main body (1) endoporus partially, the bottom, hole vertically has liquid pass hole downwards partially, and hole, liquid pass hole are not communicated with well-flushing water hole (2) partially; Spool (18) is gone up pocketed springs (19), inserts in the valve body (17), and is fixing with pressure cap (20), and valve body (17) upper end is installed and rushed down the bar that bears down on one (15), being threaded, and valve body (17) inserted in the inclined to one side hole; Main body (1) and top connection (14) to be being threaded, and limit the valve body (17) in the inclined to one side hole; Main body (1) inwall is that step and car have screw thread, inner central tube (6), exterior central tube (7) respectively with main body (1) inwall to be threaded; Last casing sliding sleeve (3), down casing separate big envelope (8) respectively with packing element (5) two ends being threaded, and be sleeved on the exterior central tube (7); Last casing sliding sleeve (3) inserts main body (1) inner chamber, and spacing with banking pin (4); Following casing is separated big envelope (8) and is fixed on the exterior central tube (7) with shear pin (9); It is up that casing is separated big envelope (8) under the step limits on the exterior central tube (7); Inner central tube (6) lower end has back pressure hole (12); Flushing valve (10) is sleeved on the inner central tube (6), and flushing valve (10) inner chamber is placed pressure limiting spring (11), and flushing valve (10) upper end car has a grade platform, holds down casing and separates big envelope (8); Insert in step lower contact (13) inner chamber flushing valve (10) lower end; Inner central tube (6) lower end and step lower contact (13) are to be threaded.

2, a kind of inflatable packer as claimed in claim 1 is characterized in that: the well-flushing water hole (2) that has on the described main body of shutoff (1).