CN208982006U - Minor diameter hydraulic control compression packer - Google Patents

Abstract

The utility model discloses minor diameter hydraulic control compression packers, including upper center tube, lower center tube, upper packing element, lower rubber cylinder, it further include upper piston mechanism, lower piston mechanism, top connection, lower contact, the upper center tube lower end connects lower center tube upper end by connector sleeve, big housing is set with outside connector sleeve, the upper piston mechanism is sleeved on outside upper center tube, upper packing element is sleeved on upper piston mechanism lower end outer wall, upper packing element lower end connects big outer set upper side by upper small connector sleeve, the lower piston mechanism is sleeved on outside lower center tube, lower rubber cylinder is sleeved on lower piston mechanism upper end outer wall, lower rubber cylinder upper end small connector sleeve under connects big housing lower end, the upper center tube upper end connects top connection, lower center tube lower end connects lower contact.The utility model provides packer setting power using ground hydraulic oil, and pushing packer, piston two-way extruding packing element completes packer setting up and down, realizes that separate layer water injection string is long-acting, reliably sets.

Description

Minor diameter hydraulic control compression packer

Technical field

The utility model relates to downhole packers, specifically minor diameter hydraulic control compression packer.

Background technique

As each elephant passes through very long exploitation, oil field generally enters high water cut viscous heavy crude oil, and waterflooding extraction is as one Kind low cost development technique, is still the development technique that each oil field is applied energetically.Waterflooding extraction is able to maintain formation pressure, is real Existing oilfield stable production, the major measure for improving Development Response of Oilfield.Fine seperated layer water injection has been increasingly becoming oil field upgrading at this stage The dominant technology of effect, each elephant and scientific research institution are mentioned, has carried out a large amount of long-acting separate zone waterflooding technology research, currently, layering Filling the water main downhole tool is layered waterflooding packer, wherein inflatable packer is in water injection string long-term injecting water, well-flushing etc. In the case of pressure oscillation, it is easy to happen string creep and then packing element is caused to fail, existing compression packer is usually adopted With single-piston Uniaxial Compression formula structure, packing element Uniaxial Compression, discontinuity, to realize that packer is reliably set, packer is sat Seal pressure is relatively high toward contact, and long-term high pressure is unfavorable for the long-acting work of packer.

Especially in recent years, it is influenced by the exploitation environment of global " low oil price ", it is desirable that oil field production development realization low cost, Efficiently, long-lived, for this purpose, develop it is a kind of efficiently, reliable, long-lived layered waterflooding packer there is good application prospect.

Chinese patent CN201510484054.4 proposes that four Tubing Packers are compressed in a kind of balanced type double-piston hydraulic control, realizes Layer separating packer bi-directional compression packing element improves packer sealing performance, but unique defect is to set piston only with single-stage, Since single stage piston area is limited, pressure is higher when packer setting, is unfavorable for packer long-term work, in addition, setting pressure Height, the wall thickness such as packer piston are larger, can not apply in minor diameter pit shaft.

The purpose of the utility model is to provide a kind of minor diameter hydraulic control compression packer, the solution prior art, which exists, to be set The problem that pressure is high, packer sealing is not tight, the service life is short.

Utility model content

The purpose of this utility model is to provide minor diameter hydraulic control compression packer, function is to utilize ground hydraulic Oil provides packer setting power, and pushing packer, piston two-way extruding packing element completes packer setting up and down, realizes layering note Water pipe column length effect is reliably set, and extends tubing string working life, to reduce operation maintenance and production cost.

In order to achieve the above objectives, the utility model use following technical solution, minor diameter hydraulic control compression packer, Including upper center tube, lower center tube, upper packing element, lower rubber cylinder, further include upper piston mechanism, lower piston mechanism, top connection, under connect Head, the upper center tube lower end connect lower center tube upper end by connector sleeve, are set with big housing, the upper piston outside connector sleeve Mechanism is sleeved on outside upper center tube, and upper packing element is sleeved on upper piston mechanism lower end outer wall, and upper packing element lower end passes through upper small connection Set connects big outer set upper side, and the lower piston mechanism is sleeved on outside lower center tube, and lower rubber cylinder is sleeved on lower piston mechanism upper end Outer wall, lower rubber cylinder upper end small connector sleeve under connect big housing lower end, and the upper center tube upper end connects top connection, lower center Pipe lower end connects lower contact, and the upper piston mechanism protrudes into inside top connection upper end, and the lower piston mechanism, which protrudes into down lower end, to be connect Head is internal, the top connection offer be connected to upper piston mechanism it is axial on set hydraulic channel and radial upper solution sealing liquid Pressure passageway, the lower contact offer and set hydraulic channel and radial lower solution sealing liquid under the axial direction for being connected to lower piston mechanism Pressure passageway

The upper piston mechanism includes level-one upper piston, second level upper piston, upper support sleeve, the upper support sleeve threaded upper ends Top connection is connected, the second level upper piston upper semisection protrudes into support sleeve, and the level-one upper piston upper semisection protrudes into top connection Interior, level-one upper piston lower semisection, which enters in upper support sleeve, to be withstood on second level upper piston upper surface, the level-one upper piston upper semisection External wall of upper portion be evagination land, evagination land outer wall and top connection inner wall seal, level-one upper piston lower semisection outer wall and upper branch Support set inner wall sealing, it is described on set the evagination land upper surface that hydraulic channel lower end is connected to level-one upper piston, the upper solution Sealing liquid pressure passageway is connected to the evagination land lower end surface of level-one upper piston, and second level upper piston upper surface is by upper support sleeve inner wall Chuck limit, second level upper piston outer wall and upper support sleeve inner wall seal, and the upper support sleeve lower end is fixed by setting shear pin On second level upper piston, the second level upper piston lower end outer wall and upper small connector sleeve inner wall are sealed.

The upper packing element is sleeved on the step surface of second level upper piston lower semisection outer wall, and upper packing element tune is arranged in upper packing element lower end Ring is saved, upper packing element adjusts ring and is threadedly coupled with upper small connector sleeve.

The lower piston mechanism includes level-one lower piston, second level lower piston, lower support sleeve, the lower support sleeve lower thread Lower contact is connected, the second level lower piston lower semisection protrudes into lower support sleeve, and the level-one lower piston lower semisection protrudes into lower contact Interior, level-one lower piston upper semisection, which enters in lower support sleeve, to be withstood on second level lower piston lower end surface, the level-one lower piston lower semisection Lower part outer wall be evagination land, evagination land outer wall and lower contact inner wall seal, level-one lower piston upper semisection outer wall and lower branch The sealing of support set inner wall, sets the evagination land lower end surface that hydraulic channel upper end is connected to level-one lower piston, the lower solution under described Sealing liquid pressure passageway is connected to the evagination land upper surface of level-one lower piston, and second level lower piston lower end surface is by lower support sleeve inner wall Chuck limit, second level lower piston outer wall and lower support sleeve inner wall seal, and the lower support set upper side is fixed by setting shear pin On second level lower piston, second level lower piston upper end outer wall small connector sleeve inner wall under is sealed.

The lower rubber cylinder is sleeved on the step surface of second level lower piston upper semisection outer wall, and lower rubber cylinder tune is arranged in lower rubber cylinder upper end Ring is saved, lower rubber cylinder adjusts ring small connector sleeve under and is threadedly coupled.

The top connection upper end connect with box cupling, it is described on set hydraulic channel upper end and be provided with and connect with liquid controling pipe line NPT connector sets hydraulic channel lower end and is provided with the NPT connector connecting with liquid controling pipe line under described.

The utility model has the advantages that compared with prior art

Minor diameter hydraulic control compression packer, when needing removing seal for packer, only from ground, well head lays down control hydraulic oil Pressure, laminated distributor under well packer are transferred to unset state, are honored as a queen to the complete solution of packer, other productions such as anti-flushing well may be implemented Management measure operation.

The technology can realize that packer is reliably set under pressure in lower set, while upper and lower piston two-way squeezes Packing element, promotes packer sealing performance, final to realize that packer is reliable, Long Campaign Life, realizes that the long-acting layering in oil field is infused Water reduces oil field development production cost.

Detailed description of the invention

Fig. 1 is the minor diameter hydraulic control compression packer structural schematic diagram of the utility model.

In figure: box cupling 1, top connection 2, upper center tube 3-1, lower center tube 3-2, level-one upper piston 4, upper support sleeve 5, second level Upper piston 6, upper packing element 7-1, spacer ring 8-1, spacer ring 8-2, upper packing element adjust ring 9-1, upper small connector sleeve 10-1, connector sleeve 11, big Housing 12, under small connector sleeve 10-2, lower rubber cylinder adjust ring 9-2, lower rubber cylinder 7-2, second level lower piston 13, lower support sleeve 14, level-one Lower piston 15, sets shear pin 17 at lower contact 16.

Specific embodiment

The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work Every other embodiment obtained, fall within the protection scope of the utility model.

Referring to Fig. 1, the utility model provides a kind of technical solution: minor diameter hydraulic control compression packer, including box cupling 1, top connection 2, upper center tube 3-1, lower center tube 3-2, level-one upper piston 4, upper support sleeve 5, second level upper piston 6, upper packing element 7- 1, spacer ring 8, upper packing element adjust ring 9-1, upper small connector sleeve 10-1, connector sleeve 11, big housing 12, under small connector sleeve 10-2, lower glue Cylinder adjusts ring 9-2, lower rubber cylinder 7-2, second level lower piston 13, lower support sleeve 14, level-one lower piston 15, lower contact 16, sets shear pin 17。

The box cupling 1 is threadedly coupled with top connection 2, and 2 lower end of top connection is threadedly coupled with upper center tube 3-1, described 11 upper end of connector sleeve is connect with upper center tube 3-1 lower thread, and 11 lower end of connector sleeve is connect with lower center tube 3-2 threaded upper ends, The lower end lower center tube 3-2 is threadedly coupled with lower contact 16, and upper 5 upper end of support sleeve is threadedly coupled with top connection 2, top connection 2 Lower end is withstood on 5 outer wall step surface of support sleeve, and the level-one upper piston 4 is located at the annular space of top connection 2 and upper center tube 3-1, It can be moved axially along upper center tube 3-1,6 upper end of second level upper piston is withstood on the step surface of 5 inside of support sleeve, simultaneously 4 lower end of level-one upper piston withstands on 6 upper surface of second level upper piston, and upper packing element 7-1 is sleeved on 6 lower end step surface of second level upper piston, institute It states and is placed with spacer ring 8-1 among packing element 7-1, the lower end upper packing element 7-1 is provided with packing element and adjusts ring 9-1, the gluing Cylinder adjusts the lower end ring 9-1 and is threadedly coupled with upper small connector sleeve 10-1, the upper lower end small connector sleeve 10-1 and big 12 screw thread of housing Connection, the upper lower end small connector sleeve 10-1 are withstood on big 12 upper end step face of housing, and the second level upper piston 6 is in upper center tube 3-1 It is moved axially in upper small connector sleeve 10-1 annular space along packer.12 lower end of big housing small connector sleeve 10-2 screw thread under connects Connect, under the upper end small connector sleeve 10-2 withstand on big 12 lower end step surface of housing, the lower end small connector sleeve 10-2 and lower rubber cylinder under described It adjusts ring 9-2 to be threadedly coupled, the lower rubber cylinder 7-2 withstands on lower rubber cylinder and adjusts on the end face ring 9-2, is provided among lower rubber cylinder 7-2 Spacer ring 8-2, the lower rubber cylinder 7-2 are sleeved on 13 upper end step face of second level lower piston, and lower 14 upper end of support sleeve withstands on two On grade 13 lower end outside step surface of lower piston, lower 14 lower end of support sleeve is threadedly coupled with lower contact 16, the lower contact 16 It is withstood on lower 14 lower end outside step surface of support sleeve on the outside of upper end, the next stage piston 15 is located at lower center tube 3-2 and connects under First 16 annular space, next stage piston 15 can be moved axially along lower center tube 3-2.

The top connection 2 and upper center tube 3-1, upper center tube 3-1 and connector sleeve 11, connector sleeve 11 and lower center tube 3-2, Lower center tube 3-2 and lower contact 16 are provided with sealing ring and retaining ring.

Between the level-one upper piston 4 and top connection 2, between level-one upper piston 4 and upper support sleeve 5, second level upper piston 6 with Two seals and retaining ring are provided between upper support sleeve 5, between second level upper piston 6 and upper small connector sleeve 10-1.

It lives between the level-one lower piston 15 and lower contact 16, between level-one lower piston 15 and lower support sleeve 14, under second level Between plug 13 and lower support sleeve 14, second level lower piston 13 and under be provided with two seals and gear between small connector sleeve 10-2 Circle.

The upper second piston 6 initially connect limit by setting shear pin with upper support sleeve 5, and the lower second piston 13 is under Support sleeve 14 is by setting shear pin connection limit.

The upper second piston 6 carries out lower limit by connector sleeve 12, carries out upper limit, institute by step surface in upper support sleeve 5 It states upper level piston 4 and lower limit is carried out by upper 6 upper surface of second piston, upper limit is carried out by 2 inner side step face of top connection.

The lower second piston 13 carries out upper limit by connector sleeve 20, carries out lower limit by step surface in lower support sleeve 14, The next stage piston 15 carries out upper limit by lower 13 lower end surface of second piston, carries out lower limit by 16 inner side step face of lower contact Position.

Upper center tube 3-1 is threadedly coupled with top connection 2, and by sealing ring, retaining ring sealing, 4 upper end of upper level piston with 2 inside annular space of top connection forms mating connection, lower end and upper 5 upper end of support sleeve and forms mating connection, and passes through sealing ring, retaining ring Sealing；Upper 6 upper end of second piston and upper 5 lower end inside of support sleeve, which are formed, to be cooperatively connected, upper double by sealing ring, retaining ring sealing Packing element 7-1 and spacer ring 8-1 is sleeved at 6 lower end step surface of second piston, and upper second piston 6 is formed with upper small connector sleeve 10-1 It is cooperatively connected, and by sealing ring, retaining ring sealing, upper double packing element 7-1 adjust ring 9-1 and upper small connector sleeve 10-1 spiral shell by upper packing element Line length of action adjusts packing element original shape position.After the lower end upper center tube 3-1 is connect with connector sleeve 11, big housing 12 is connected Then the small connector sleeve 10-2 under is inserted in lower rubber cylinder and adjusts ring 9-2, lower double packing element 7-2 and spacer ring 8-2 and lower second piston 13, lower 13 upper end of second piston small connector sleeve 10-2 under, which is formed, to be cooperatively connected, and is inserted in lower support in lower 13 lower end of second piston Set 14, lower 13 lower end of second piston and lower support sleeve 14, which are formed, to be cooperatively connected, then is inserted in next stage below lower support sleeve 14 and lives Plug 15,15 upper end of next stage piston and lower support sleeve 14, which are formed, to be cooperatively connected, and finally loads onto lower contact in the lower end lower center tube 3-2 16,15 lower end of next stage piston is cooperatively connected with formation on the inside of lower contact 16.Finally, load onto two groups set shear pin 16-1,16-2, In top connection connected pipes box cupling 1.

Tool is connect with top connection 2, lower contact 16 respectively with separate layer water injection string tripping in predetermined position, by liquid controling pipe line, Every layer of hydraulic control compression packer is successively put on, liquid controling pipe line is fixed on oil-pipe external wall, is pierced by from production tree always, completes The tripping in of hydraulic control compression packer.

The top connection 2 is threadedly coupled with upper center tube 3-1, and the lower end upper center tube 3-1 is threadedly coupled with connector sleeve 11, even 11 lower end of female connector is threadedly coupled with lower center tube 3-2, and the lower end lower center tube 3-2 is threadedly coupled with lower contact 16, level-one upper piston 4 Upper end is located in upper center tube 3-1 and the annular space of top connection 2, and upper support sleeve 5 is connect by screw thread with 2 lower end of top connection, second level 6 upper end of upper piston is against on the step surface of 5 inside of support sleeve, is set packing element 7-1 and is sleeved on 6 lower end outside of second level upper piston On step surface, there is spacer ring 8-1 among packing element 7-1, the lower end packing element 7-1 and upper packing element adjust ring 9-1 upper-end contact, adjust ring 9-1 Lower end is connected through a screw thread with the upper end small connector sleeve 10-1, is adjusted ring 9-1 by upper packing element and is limited packing element along packer axis Shaped position, the lower end small connector sleeve 10-1 are connect by screw thread with big 12 threaded upper ends of housing.Symmetrically, big 12 lower end of housing with Small connector sleeve 10-2 threaded upper ends connection, the lower end small connector sleeve 10-2 adjust ring 9-2 threaded upper ends with lower rubber cylinder and connect, set down Packing element 7-2 is sleeved on 13 outside step surface of second level lower piston, and lower rubber cylinder adjusts ring 9-2 and connects with the upper surface lower rubber cylinder 7-2 is set Touching, and ring 9-2 adjusted by lower rubber cylinder control and set lower rubber cylinder 7-2 along packer axis shaped position, lower second piston 13 Lower end is withstood on the step surface of 14 lower end inside of support sleeve, and next stage piston 15 is in lower center tube 3-2, lower contact 16, support sleeve In the annular space of 14 compositions, sets shear pin and control support sleeve 5 and second level upper piston 6, support sleeve 14 and second level lower piston respectively 13 initial position.

The minor diameter hydraulic control compression packer, with, to after predetermined depth, passing through ground hydraulic under separate layer water injection string Pump is suppressed, and high pressure liquid pressure oil is transferred on packer piston 4,6,13,15 through liquid controling pipe line, and high pressure liquid pressure oil squeezes out packer liquid After the air of keyholed back plate line, pressure persistently rises, upper piston 4,6 and the cutting of lower piston 13,15 is pushed to set shear pin, and piston continues to move Dynamic, squeeze packer packing element 7-1,7-2 realize that packer setting, the packer are set by second piston completion, lesser seat Sealing pressure can be realized packer and set completely, upper lower piston simultaneously, Bidirectional-squeezing set packing element, packing element uniform force has Conducive to packer long-term work, after the completion of packer setting, the seperated layer water injection of tubing string can be realized.

Between the level-one upper piston 4 and top connection 2, sealing ring is set between level-one upper piston 4 and upper support sleeve 5, one Grade upper piston 4 can be moved axially in 2 inner wall of top connection；Between the second level upper piston 6 and upper support sleeve 5, second level upper piston 6 Sealing ring is set with upper small connector sleeve 10-1, second level upper piston 6 can be moved axially along upper center tube 3-1 outer wall.

Between the level-one lower piston 15 and lower contact 16, sealing is set between level-one lower piston 15 and lower support sleeve 14 Circle, level-one lower piston 15 can be moved axially in 16 inner wall of lower contact；Between the second level lower piston 13 and lower support sleeve 14, two Sealing ring is arranged in grade lower piston 13 small connector sleeve 10-2 under, and second level lower piston 13 can axially be moved along lower center tube 3-2 outer wall It is dynamic.

The second piston 6 is connect with support sleeve 5, second piston 13 with support sleeve 14 by setting shear pin, when piston 6,13 Inside and outside oil pressure pressure difference sets shear pin cutting when being greater than the switch DP of design, avoid tool packing element 7-1,7-2 during tripping in It sets and packing element is caused to wear.

The top connection 2 is provided with the NPT connector and oil flow channel connecting with liquid controling pipe line.

The lower contact 16 is provided with the NPT connector and oil flow channel connecting with liquid controling pipe line.

The minor diameter hydraulic control compression packer, when needing removing seal for packer, only from ground, well head lays down control liquid Oil pressure, laminated distributor under well packer i.e. be transferred to unset state, be honored as a queen to the complete solution of packer, may be implemented anti-flushing well etc. other Production management measure operation.

Working principle: when seperated layer water injection, by being suppressed manually to pressure pump to wellhead fluid control line, when hydraulic fluid pressure reaches When to certain pressure, hydraulic oil pushes the cutting of second piston 6,13 to set shear pin, piston 6,13 to mobile in the middle part of packer, squeezes Packing element 7-1,7-2, packing element 7-1,7-2 expand outwardly to the casing of packer outer layer under external force extruding, packing element 7-1, 7-2 is badly deformed set after, tubing string is completed each layer and is effectively separated, and well head water filling can be carried out.

When needing anti-flushing well, by wellhead fluid control line pressure release, packing element 7-1,7-2 under natural resiliency effect by Step restores to the original state, and after packing element 7-1,7-2 restore completely, the anti-flushing well process for carrying out tubing string is filled the water by casing.

Minor diameter hydraulic control compression packer uses two-stage piston two-way and compresses packing element structure, realizes packer rubber Cylinder uniform stressed is set, packer sealing performance boost completely, sets pressure lesser that packer can be realized is completely close Envelope improves packer working life, and then reducing packer damage causes separate-layer string to be realized, avoids later period operating cost, Guarantee the long-acting water filling reliability in oil field, realizes that low cost development provides effective technical support for oil field.

In the description of the present invention, it should be understood that temporald eixis or positional relationship are based on the figure Orientation or positional relationship is merely for convenience of description the utility model, rather than the device or element of indication or suggestion meaning must There must be specific orientation, be constructed and operated in a specific orientation, therefore should not be understood as limiting the present invention.

While there has been shown and described that the embodiments of the present invention, for the ordinary skill in the art, It is understood that these embodiments can be carried out with a variety of variations in the case where not departing from the principles of the present invention and spirit, repaired Change, replacement and variant, the scope of the utility model is defined by the appended claims and the equivalents thereof.

Claims (6)

1. minor diameter hydraulic control compression packer, including upper center tube, lower center tube, upper packing element, lower rubber cylinder, which is characterized in that It further include upper piston mechanism, lower piston mechanism, top connection, lower contact, the upper center tube lower end is connected in lower by connector sleeve Heart Guan Shangduan, connector sleeve outside are set with big housing, and the upper piston mechanism is sleeved on outside upper center tube, and upper packing element is sleeved on Piston mechanism lower end outer wall, upper packing element lower end connect big outer set upper side by upper small connector sleeve, and the lower piston mechanism is sleeved on Outside lower center tube, lower rubber cylinder is sleeved on lower piston mechanism upper end outer wall, and the small connector sleeve connection under of lower rubber cylinder upper end is big outer Lower end is covered, the upper center tube upper end connects top connection, and lower center tube lower end connects lower contact, and the upper piston mechanism is stretched upper end Enter inside top connection, the lower piston mechanism protrudes into inside lower contact lower end, and the top connection, which offers, is connected to upper piston machine Hydraulic channel and radial upper deblocking hydraulic channel are set in the axial direction of structure, the lower contact, which offers, is connected to lower piston machine Hydraulic channel and radial lower deblocking hydraulic channel are set under the axial direction of structure.

2. minor diameter hydraulic control compression packer according to claim 1, which is characterized in that the upper piston mechanism includes Level-one upper piston, second level upper piston, upper support sleeve, the upper support sleeve threaded upper ends connect top connection, the second level upper piston Upper semisection protrudes into support sleeve, and the level-one upper piston upper semisection protrudes into top connection, and level-one upper piston lower semisection enters upper It is withstood in support sleeve on second level upper piston upper surface, the external wall of upper portion of the level-one upper piston upper semisection is evagination land, evagination Land outer wall and top connection inner wall seal, and level-one upper piston lower semisection outer wall and upper support sleeve inner wall seal, it is described on set liquid Pressure passageway lower end is connected to the evagination land upper surface of level-one upper piston, and the upper deblocking hydraulic channel is connected to level-one upper piston Evagination land lower end surface, second level upper piston upper surface by upper support sleeve inner wall chuck limit, second level upper piston outer wall It is sealed with upper support sleeve inner wall, the upper support sleeve lower end is fixed on second level upper piston by setting shear pin, in the second level Piston outer wall and upper small connector sleeve inner wall seal.

3. minor diameter hydraulic control compression packer according to claim 2, which is characterized in that the upper packing element is sleeved on two On the step surface of grade upper piston lower semisection outer wall, upper packing element lower end is arranged upper packing element and adjusts ring, and upper packing element adjusts ring and upper little Lian Female connector is threadedly coupled.

4. minor diameter hydraulic control compression packer according to claim 1, which is characterized in that the lower piston mechanism includes Level-one lower piston, second level lower piston, lower support sleeve, the lower support sleeve lower thread connect lower contact, the second level lower piston Lower semisection protrudes into lower support sleeve, and the level-one lower piston lower semisection protrudes into lower contact, under level-one lower piston upper semisection enters It is withstood in support sleeve on second level lower piston lower end surface, the lower part outer wall of the level-one lower piston lower semisection is evagination land, evagination Land outer wall and lower contact inner wall seal, and level-one lower piston upper semisection outer wall and lower support sleeve inner wall seal, and set liquid under described Pressure passageway upper end is connected to the evagination land lower end surface of level-one lower piston, and the lower deblocking hydraulic channel is connected to level-one lower piston Evagination land upper surface, second level lower piston lower end surface by lower support sleeve inner wall chuck limit, second level lower piston outer wall It is sealed with lower support sleeve inner wall, the lower support set upper side is fixed on second level lower piston by setting shear pin, under the second level Outer wall small connector sleeve inner wall under in piston upper end seals.

5. minor diameter hydraulic control compression packer according to claim 4, which is characterized in that the lower rubber cylinder is sleeved on two On the step surface of grade lower piston upper semisection outer wall, lower rubber cylinder upper end is arranged lower rubber cylinder and adjusts ring, and lower rubber cylinder adjusts ring and lower little Lian Female connector is threadedly coupled.

6. minor diameter hydraulic control compression packer described in -5 any one according to claim 1, which is characterized in that connect on described Head upper end is connect with box cupling, it is described on set hydraulic channel upper end and be provided with the NPT connector connecting with liquid controling pipe line, the lower seat Sealing liquid pressure passageway lower end is provided with the NPT connector connecting with liquid controling pipe line.