CN110259407A - A kind of machine liquid inner-lock-type compression packer - Google Patents
A kind of machine liquid inner-lock-type compression packer Download PDFInfo
- Publication number
- CN110259407A CN110259407A CN201910640875.0A CN201910640875A CN110259407A CN 110259407 A CN110259407 A CN 110259407A CN 201910640875 A CN201910640875 A CN 201910640875A CN 110259407 A CN110259407 A CN 110259407A
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- lock
- fluid cylinder
- type compression
- sealing
- mechanical
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- 239000007788 liquid Substances 0.000 title claims abstract description 69
- 230000006835 compression Effects 0.000 title claims abstract description 39
- 238000007906 compression Methods 0.000 title claims abstract description 39
- 238000007789 sealing Methods 0.000 claims abstract description 80
- 239000012530 fluid Substances 0.000 claims abstract description 69
- 230000007246 mechanism Effects 0.000 claims abstract description 55
- 238000012856 packing Methods 0.000 claims abstract description 29
- 230000009471 action Effects 0.000 claims abstract description 9
- 239000003292 glue Substances 0.000 claims description 23
- 239000003921 oil Substances 0.000 claims description 15
- 238000004026 adhesive bonding Methods 0.000 claims description 8
- 238000005260 corrosion Methods 0.000 claims description 8
- 239000010687 lubricating oil Substances 0.000 claims description 7
- 239000011148 porous material Substances 0.000 claims description 5
- 238000004873 anchoring Methods 0.000 claims description 3
- 208000002925 dental caries Diseases 0.000 abstract description 3
- 230000007774 longterm Effects 0.000 abstract description 3
- 239000000243 solution Substances 0.000 description 15
- 230000000694 effects Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 125000006850 spacer group Chemical group 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000003801 milling Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000004069 differentiation Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 230000009972 noncorrosive effect Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/126—Packers; Plugs with fluid-pressure-operated elastic cup or skirt
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/126—Packers; Plugs with fluid-pressure-operated elastic cup or skirt
- E21B33/1265—Packers; Plugs with fluid-pressure-operated elastic cup or skirt with mechanical slips
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/129—Packers; Plugs with mechanical slips for hooking into the casing
- E21B33/1295—Packers; Plugs with mechanical slips for hooking into the casing actuated by fluid pressure
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Sealing Devices (AREA)
- Earth Drilling (AREA)
Abstract
A kind of machine liquid inner-lock-type compression packer, sealing mechanism is conciliate including cock, twin-stage fluid cylinder, liquid locking-valve, interior middle pipe, central tube, lower balance mechanism, the orderly connection combination of above-mentioned all parts successively constitutes multiple cavitys for having independent action, each cavity is linked together to form closed cavity, closed cavity is arranged between top connection and lower contact, wherein, closed cavity includes annular chamber, upper fluid cylinder chamber, lower fluid cylinder chamber, lower counter balance pocket and deblocking chamber；Liquid locking-valve is arranged at top connection or lower contact, and using the Incoercibility of liquid, solve mechanical lock moves back tooth phenomenon；This packer further includes that mutually independent mechanical internal lock mechanism and mechanical outer lock mechanism wherein another set of mechanism can work on after a set of failure mechanisms maintain long-term effectiveness；Retaining mechanism is applied in combination inside and outside twin-stage fluid cylinder and machinery, and packing element is made to realize secondary Bidirectional-squeezing, reduces the rollback of mechanical internal lock mechanism away from improving two way alternate bearing capacity of the invention.
Description
Technical field
The invention belongs to oil exploitation field of mechanical technique, are related to a kind of machine liquid inner-lock-type compression packer.
Background technique
In the complete well of field of petroleum exploitation, oil production by layer and note CO2In equal operations, packer is commonly used to separate oil reservoir, close
Seal oil jacket annulus, suspension down-hole string etc..
In note CO2The anti-corrosion effect that packer is improved in well, such as the resistance to CO of patent2Corrosion type Y443 packer (application number
200920170741.9), the purpose is to provide CO2Guarantee injection air seal, while resistance to CO again in injection well2Corrosion, using double
To slips, frame mode that is hydraulic base sealed and boring milling deblocking；The part of product uses non-corrosive material, material cost height, difficult processing
Height is spent, using milling mode is bored, activity duration length, process are more, costly for deblocking.
In order to improve the sealing effect of packer, such as three power bidirectional compression type hydraulic packer (application number of patent
201520848467.1) two fluid cylinder retaining mechanisms, are devised and load hydraulic coupling jointly from the up and down direction of slips, are loaded hydraulic
Power and the mechanical load that pushes of upper tubing string compress packing element, keep packer sealing effect more preferable.Existing defect: using single-stage oil
Cylinder seat envelope, compressing force are small, setting pressure is high, seal and be anchored unstable；Two fluid cylinder retaining mechanisms are all made of tooth engaging conformation,
Exist after setting pressure release and moves back tooth phenomenon；The relevant technical literature " development of two-way three power load gas injection packer " published
Show packing element rollback 1.7mm, reinforces the thrust decline 60% at end；If compressing packing element by tubing string weight, compensates for and move back tooth mistake
The compressing force gone, but loaded load size is restricted by hole deviation, it is unstable.
Summary of the invention
The purpose of the present invention is to provide a kind of machine liquid inner-lock-type compression packers, at least to solve an above-mentioned skill
Art problem.
The technical solution of the application is a kind of machine liquid inner-lock-type compression packer, which is characterized in that including cock, twin-stage
Fluid cylinder, liquid locking-valve, interior middle pipe, central tube, lower balance mechanism conciliate sealing mechanism, and the orderly connection combination of above-mentioned all parts is successively
Multiple cavitys for having independent action are constituted, each cavity is linked together to form closed cavity, and the closed cavity is arranged in top connection
Between lower contact, wherein
The closed cavity includes annular chamber, upper fluid cylinder chamber, lower fluid cylinder chamber, lower counter balance pocket and deblocking chamber；
There is upper inlet opening in the top connection, there is lower inlet opening in lower contact, oil jacket connection is additionally provided at the top connection
Hole；
The closed cavity pours into or injects lubricating oil and anti-corrosion medium by the upper inlet opening of unscrewing cock or liquid locking-valve；
The twin-stage fluid cylinder includes upper piston, upper fluid cylinder, lower piston, lower cylinder sleeve, central tube, manages in glue and gluing pin；
It is integrally fixed to form lower fluid cylinder with gluing pin between pipe and lower cylinder sleeve in the glue.
Preferably, liquid locking-valve is arranged at top connection or lower contact, and the liquid locking-valve includes top connection or the inclined hole of lower contact
Interior feed liquor piston, sealing ring, spring and spring abutment.
Preferably, the cock setting is led in annular chamber radial outer wall in upper piston, thread seal connection；Or setting exists
Upper fluid cylinder leads in fluid cylinder chamber radial outer wall, thread seal connection；Or seat is set under slips to lead to lower counter balance pocket diameter outside
On wall, thread seal connection；Or the outside that deblocking chamber end is led in lower contact is set, thread seal connection.
Preferably, machine liquid inner-lock-type compression packer includes mechanical lock, and the mechanical lock includes mechanical internal lock and machinery
External lock can work independently from each other between the mechanical internal lock and mechanical external lock, and the mechanical internal lock includes central tube, pipe in glue, interior
Circlip and circlip set, the machinery external lock includes upper piston, circlip set, upper fluid cylinder and C-shaped clamp spring.
Preferably, machine liquid inner-lock-type compression packer further includes sealing and anchor, and sealing and anchorage assembly include
Dynamic pressure ring, rubber base pin, upper tapered sleeve, external slips, watt seat pin nail, lower cylinder sleeve and packing element, the sealing and anchor are in twin-stage
It is acted step by step under the promotion of fluid cylinder, successively are as follows: (1) a watt seat pin nail is cut, and external slips are under the promotion of upper tapered sleeve along inclined-plane radial direction
It stretches out and is anchored with internal surface of sleeve pipe, (2) rubber base pin is cut, the deformation of compression cartridge and internal surface of sleeve pipe under the promotion of dynamic pressure ring
Contact forms sealing, and (3) gluing pin is cut, and lower cylinder sleeve is under the promotion of upper fluid cylinder from other side compression seal packing element.
Preferably, machine liquid inner-lock-type compression packer further includes lower balance mechanism, and the lower balance mechanism is arranged close
Envelope and anchor bottom end, the lower balance mechanism include seat under slips, central tube and lower support base, seat under the slips, in
Heart pipe, lower support base form lower counter balance pocket.
Preferably, the machine liquid inner-lock-type compression packer further include solution sealing mechanism, the solution sealing mechanism include top connection,
Unseal seat, closing piece support body, closing piece, lower lock tube and lower contact or lower lock tube connector under pin, interior middle pipe, slips.
Preferably, machine liquid inner-lock-type compression packer further includes emptying mechanism, and the emptying mechanism includes top connection
Oil jacket intercommunicating pore, sealing ring and upper piston.
Preferably, it can be worked independently from each other between the liquid locking-valve, mechanical internal lock and mechanical external lock, the liquid locking-valve can be with machine
Tool internal lock and mechanical external lock, are respectively combined setting.
Machine liquid inner-lock-type compression packer provided by the present application, including two sets of mutually independent machine liquid retaining mechanisms and double
Grade fluid cylinder, twin-stage fluid cylinder it is in the same direction, synchronous, respectively to slips and packing element implement thrust complete it is primary setting；Repressurization upper liquid
From another side compression packing element of packing element and locking, tooth when compensating for primary setting is moved back away from foring secondary setting, packing element is realized cylinder
Bi-directional compression, the reliability of sealing are greatly improved；Liquid locking-valve is set at the inlet of annular chamber, it is fast after setting pressure release
Speed is closed, and forms liquid lock, using the Incoercibility of liquid, solve mechanical lock moves back tooth phenomenon；It can be filled in annular chamber
Lubricating oil ensure that the reliability of the long-term underground work of tool, solve influence of the corrosion and scaling to tool reliability.
Detailed description of the invention
Fig. 1 is schematic structural view of the invention；
Fig. 2 is structure enlargement diagram at A in Fig. 1；
Fig. 3 is structure enlargement diagram at B in Fig. 1；
Fig. 4 is structure enlargement diagram at C in Fig. 1；
Fig. 5 is structural schematic diagram at forced action type solution sealing mechanism lower contact；
Fig. 6 is liquid locking-valve structural schematic diagram at lower contact.
Specific embodiment
Present invention will be further explained below with reference to the attached drawings and examples.
The present invention provides a kind of machine liquid inner-lock-type compression packers, referring to Fig. 1 to Fig. 4, including cock 9, twin-stage liquid
Cylinder, liquid locking-valve, interior middle pipe 13, central tube 19, lower balance mechanism conciliate sealing mechanism, the orderly connections of above-mentioned all parts combine according to
Secondary to constitute multiple cavitys for having independent action, each cavity is linked together to form closed cavity, and closed cavity is arranged in 1 He of top connection
Between lower contact 39, wherein
Closed cavity includes annular chamber 40, upper fluid cylinder chamber 41, lower fluid cylinder chamber 42, lower counter balance pocket 43 and deblocking chamber 44；
There is upper inlet opening 1-2 in top connection 1, there is lower inlet opening 39-3 in lower contact 39, oil jacket company is additionally provided at top connection 1
Through-hole 1-1；
Closed cavity pours into or injects lubricating oil and anti-corrosion medium by the upper inlet opening 1-2 of unscrewing cock 9 or liquid locking-valve；
There are gaps to form annular chamber 40 between top connection 1 and upper piston 12, and deblocking chamber 44, annular chamber are equipped at lower contact 39
40 or unseal chamber 44 side be equipped with liquid locking-valve；
Twin-stage fluid cylinder include upper piston 12, upper fluid cylinder 14, lower piston 16, lower cylinder sleeve 18, central tube 19, in glue pipe 20 and on
Glue pin 21；9 outer surface of cock is equipped with the 2nd O sealing ring 5, and cock 9 is threadedly coupled with upper piston 12, and the 2nd O sealing ring 5
Between 12 inner wall of cock outer surface and upper piston；
12 one end of upper piston connects top connection 1, and the other end is inserted in fluid cylinder 14, is equipped between upper piston 12 and upper fluid cylinder 14
4th O sealing ring 15, the 4th O sealing ring 15 are formed to the sealing between upper piston 12 and upper fluid cylinder 14；
Upper fluid cylinder 14 is built-in with the 5th O sealing ring 17, and the 5th O sealing ring 17 is arranged between upper fluid cylinder 14 and lower piston 16,
It is formed to the sealing between upper fluid cylinder 14 and lower piston 16；
Be inserted in fluid cylinder 14 12 threaded one end of upper piston connection 16 one end of lower piston, lower piston 16 be equipped with lower piston into
Liquid mouth 16-1 is connected between 16 other end of lower piston and lower cylinder sleeve 18 by external 4th O sealing ring 15, and 20 one end of pipe is under in glue
It is connected between cylinder sleeve 18 also by external 4th O sealing ring 15, inside is also at 16 one end of lower piston connecting with lower cylinder sleeve 18
Heart pipe 19 is threadedly coupled, and is inserted between 12 one end of the upper piston of fluid cylinder 14 and upper fluid cylinder 14, lower piston 16 and is formed upper fluid cylinder
Chamber 41；
Central tube 19 is equipped with central tube the first inlet 19-1 and central tube the second inlet 19-3,19 outer ring of central tube
It is cased with pipe 20 in glue；
It is integrally fixed to form lower fluid cylinder with gluing pin 21 between pipe 20 and lower cylinder sleeve 18 in glue, pipe 20 passes through built-in in glue
5th O sealing ring 17 is connect with central tube 19, and the 5th O sealing ring is formed to the sealing in glue between pipe 20 and central tube 19, connection
Lower fluid cylinder chamber 42 is formed in 16 one end of lower piston of central tube and central tube 19 and glue between pipe 20.
As a preferred solution, liquid locking-valve includes top connection 1 or is arranged at lower contact as shown in Figure 6, specific to wrap
Including feed liquor piston 3, spring 6 and the spring abutment 8 in the inclined hole of lower contact 39,3 outer surface of feed liquor piston is equipped with the 2nd O sealing ring 5, and second
The realization of O sealing ring 5 sets the sealing between feed liquor piston 3 and top connection 1 or between lower contact 39, feed liquor piston 3 and spring abutment 8 respectively
The both ends in inclined hole, one end of one end connection feed liquor piston 3 of spring 6 are set, the other end of spring 6 connects spring abutment 8, the spring
Seat 8 is threadedly coupled with inclined bore ends, and feed liquor piston 3 is equipped with lead channel 3-1.
As a preferred solution, machine liquid inner-lock-type compression packer includes mechanical lock, and mechanical lock includes in machinery
Lock and mechanical external lock, can work independently from each other between mechanical internal lock and mechanical external lock；Mechanical internal lock includes central tube 19, manages in glue
20, internal jump ring 27 and circlip set 28,19 outer ring of central tube are successively arranged pipe 20 and circlip set 28 in glue, pipe 20 in glue from the top down
It is threadedly coupled with circlip set 28, forms first annular space in glue between pipe 20 and circlip set 28, internal jump ring 27 is arranged in the first ring
In shape space, internal jump ring 27 can be strutted radially, and central tube 19 is equipped with the outer pawl 19-2 of central tube, and the internal tooth of internal jump ring 27 is in
The outer pawl 19-2 of heart pipe is mutually matched engagement, and pipe 20 pushes internal jump ring 27 mobile in glue, the internal tooth and central tube 19 of internal jump ring 27
Outer pawl 19-2 engagement, circlip set 28 retract when its outer inclined-plane 28-1 lock internal jump ring 27；
Mechanical external lock includes upper piston 12, circlip set 11, upper fluid cylinder 14 and C-shaped clamp spring 10,12 outer ring of upper piston successively from
On be inserted in circlip set 11 and upper fluid cylinder 14 downwards, circlip set 11 is threadedly coupled with upper fluid cylinder 14, and circlip covers between 11 and upper fluid cylinder 14
The second annular space is formed, C-shaped clamp spring 10 is arranged in the second annular space, and C-shaped clamp spring 10 can be strutted radially, on upper piston 12
Equipped with pawl 12-1 outside upper piston, the internal tooth of C-shaped clamp spring 10 matches with the outer pawl 12-1 of upper piston to be engaged, and upper fluid cylinder 14 is run
When, circlip set 11 drives C-shaped clamp spring 10 mobile, and the internal tooth of C-shaped clamp spring 10 is engaged with the outer pawl 12-1 on upper piston 12, upper liquid
C-shaped clamp spring 10 is locked when cylinder 14 retracts.
As a preferred solution, machine liquid inner-lock-type compression packer further includes sealing and anchor, sealing and
In twin-stage fluid cylinder bottom end, sealing and anchorage assembly include lower cylinder sleeve 18, central tube 19, pipe 20 in glue, for anchor setting
One spacer ring 23-1, the second spacer ring 23-2 and dynamic pressure ring 24, upper tapered sleeve 26, circlip set 28, watt seat pin nail 29, connect rubber base pin 25
Seat 35 under outbound nail 30, external slips set 31, leaf spring 32, external slips 33, packing element, screw 34 and slips, packing element include the first packing element
22-1, the second packing element 22-2 and third packing element 22-3；
Successively cover the first packing element 22-1, the first spacer ring 23-1, the second packing element 22-2, in glue on 20 outer ring of pipe from the top down
Two spacer ring 23-2, third packing element 22-3, dynamic pressure ring 24 and upper tapered sleeve 26, circlip set 28 are threadedly coupled with 20 bottom end of pipe in glue,
The axial movement of dynamic pressure ring 24 is controlled, circlip set 28 is fixedly connected between upper tapered sleeve 26 with rubber base pin 25；
Dynamic pressure ring 24 is connect with upper 26 threaded one end of tapered sleeve, and external slips 33 are placed in wild card after being fixed with leaf spring 32 with screw 34
In watt set 31, for 33 sets of the external slips on central tube 19,29, connecting pin are followed closely with watt seat pin respectively in one end of external slips set 31
30 connect with upper 26 other end of tapered sleeve, and external slips cover 31 other ends and connect with the connecting pin 30 of seat 35 under slips.
Sealing and anchor act step by step under the promotion of twin-stage fluid cylinder, successively are as follows: first is that a watt seat pin nail 29 is cut,
External slips 33 are extended radially out along inclined-plane under the promotion of upper tapered sleeve 26 and are anchored with internal surface of sleeve pipe, second is that rubber base pin 25 is cut,
Dynamic pressure ring 24 pushes lower compression cartridge deformation to contact to form sealing with internal surface of sleeve pipe, third is that gluing pin 21 is cut, under
Cylinder sleeve 18 is under the promotion of upper fluid cylinder 14 from other side compression seal packing element.
As a preferred solution, machine liquid inner-lock-type compression packer further includes lower balance mechanism, lower balance mechanism
It is arranged in sealing and anchor bottom end, lower balance mechanism includes seat 35 under slips, central tube 19 and lower support base 36, under slips
Seat 35, central tube 19, lower support base 36 form lower counter balance pocket 43；
The 5th O sealing ring 17 built in 35 one end of seat cooperates with the sealing of central tube 19 under slips, and the other end and external 4th O are close
The lower support base 36 of seal 15 seals cooperation, and lower support base 36 is threadedly coupled with 19 bottom end of central tube, and lower support base 36 is arranged
Under slips in seat 35, lower counter balance pocket 43 is connected to the second inlet of central tube 19-3, and 35 bottom end of seat is equipped with lower lock under slips
Set 37.
As a preferred solution, the setting of cock 9 is led in 40 radial outer wall of annular chamber in upper piston 12, thread seal
Connection；Or setting is led in upper 41 radial outer wall of fluid cylinder chamber in upper fluid cylinder 14, thread seal connection；Or seat is set under slips and is led to
In 43 radial outer wall of downward counter balance pocket, thread seal connection；Or the outside that deblocking 44 end of chamber is led in lower contact 39, screw thread are set
It is tightly connected.In the present embodiment, cock is that setting is led in 40 radial outer wall of annular chamber in upper piston 12, thread seal connection,
And cock 9 pours into lubricating oil by unscrewing cock 9 in the top end of annular chamber 40, annular chamber 40.
As a preferred solution, which further includes solution sealing mechanism, Xie Fengjigoubao
Include top connection 1, deblocking pin 4, the first O sealing ring 2, the 3rd O sealing ring 7, interior middle pipe 13, lower lock tube connector 45, closing piece support body
46 and lower contact 39；By twin-stage fluid cylinder, sealing and anchor, the locking of machine liquid and lower balance mechanism it is orderly be assembled into one it is whole
Body；The top connection 1 of built-in O sealing ring 2 penetrates inner hole after being threadedly coupled with interior middle pipe 13, the external O sealing ring 7 of top connection 1 with it is upper
Piston 12 is cooperatively connected, and the lower contact 39 of built-in O sealing ring 2 is threadedly coupled with interior middle pipe 13 and props up closing piece 38, outside lower contact 39
It sets O sealing ring 7 and the sealing of lower support base 36 cooperates, seat 35 is threadedly coupled with lower lock tube 37 and locks closing piece 38, lower lock under slips
The outer inclined-plane of set 37 is contacted with the outer inclined-plane 39-2 of lower contact 39, and deblocking pin 4 is fixed by upper piston 12 and top connection 1, by it
It is integrally attached between the top connection 1 and lower contact 39 of solution sealing mechanism.The advantages of program: (1) 35 inner cavity of seat under slips is utilized
The thrust for balancing an oil cylinder alleviates 38 bearing capacity of closing piece, improves the reliability of deblocking；(2) deblocking pin 4 is solely subjected to
The shearing force for mentioning tubing string solves the fatigue damage of pulsating stress generation, extends underground service life, improve packer
Reliability.
Fig. 5 is a kind of forced action type solution sealing mechanism of alternative Fig. 4 structure, and solution sealing mechanism, which includes top connection 1, passes through built-in the
One O sealing ring 2 is threadedly coupled with interior middle pipe 13, and interior middle pipe 13 is arranged in lower piston 16 and central tube 19, and runs through upper piston
16 and central tube 19, the external 3rd O sealing ring 7 of top connection 1 connect with upper piston 12, the first O sealing ring 2 built in closing piece support body 46
It is threadedly coupled with interior middle pipe 13, closing piece support body 46 is equipped with closing piece 38, and closing piece support body 46 is for propping up closing piece 38, closing piece support body 46
External 3rd O sealing ring 7 cooperates with the sealing of lower support base 36, and seat 35 is threadedly coupled with lower lock tube connector 45 and locks lock under slips
Block 38, the built-in O sealing ring 2 of lower lock tube connector 45 and the extension annular surface 46-2 of closing piece support body 46 are sealed and are cooperated, and unseal pin 4
Upper piston 12 and top connection 1 is fixed, and sealing and anchor are arranged between top connection 1 and closing piece support body 46, the closing piece
Support body 46 is equipped with reducing slot 46-1, and deblocking chamber 44 is equipped between lower support base 36 and closing piece support body 46.The advantages of program is to solve
After offset nail 4 is sheared, lower part tubing string drive seat 35 under lower lock tube connector 45, slips, sealing and anchor, the locking of machine liquid and
The direct downlink of lower cylinder sleeve 18, deblocking are reliable；Deficiency is that the shear-type load of deblocking pin 4 will be prevented with lower part tubing string weight-matched
It is cut during going into the well, the shear-type load for unsealing pin 4 is big.
The machine liquid inner-lock-type compression packer further includes emptying mechanism as a preferred method, and emptying mechanism includes
Top connection 1, upper piston 12 and the 4th O sealing ring 15 pass through the 4th O in the top connection 1 in two end slots of oil jacket intercommunicating pore 1-1
Sealing ring 15 and the cooperation of upper piston 12 seal.
Liquid locking-valve, mechanical internal lock in the present embodiment, mechanical external lock can respectively, independent work, can also any two group
It closes and is arranged, after a set of failure mechanisms, another set of mechanism can work on, and maintain the long-term effectiveness of retaining mechanism；
Liquid locking-valve quick closedown forms liquid lock, and due to the Incoercibility of liquid, solve mechanical lock moves back tooth phenomenon；
Liquid valve structure is simple, easily manufactures, and does not interfere with each other when working with mechanical interlock mechanism, the Adding Way letter of lubricating oil in annular chamber
It is single, it can be used and pour into and the modes such as low pressure injection；
Lubricating oil or impregnating fluid are injected in annular chamber 40, common material manufacture can be selected, the surface of each working chamber does not connect
Touch corrosive medium, mating surface non-scaling, corrosion；It is dynamic to solve each mechanism completion deblocking for the reliability for improving separation and anchoring
The reliability of work.
Twin-stage fluid cylinder and mechanical lock are applied in combination, and so that packing element is realized secondary Bidirectional-squeezing, reduce mechanical internal lock mechanism
Rollback away from improving two way alternate bearing capacity of the invention；Secondary setting use fluid cylinder compresses, and pressing force is reliable and stable,
Improve the ability for adapting to hole deviation.
When this packer set, pressure fluid is through the upper inlet opening 1-2 of the top connection 1 or lower inlet opening 39-3 of lower contact 39 and liquid
The lead channel 3-1 of locking-valve enters annular chamber 40, respectively by lower piston inlet opening 16-1, central tube the first inlet 19-1 and in
Heart pipe the second inlet 19-3 enters upper fluid cylinder chamber 41, lower fluid cylinder chamber 42, lower counter balance pocket 43 and deblocking chamber 44, solves sealing mechanism in ring
Shape chamber 40 and the lower holding balance of the deblocking effect of chamber 44, upper fluid cylinder 14, lower fluid cylinder push sealing mechanism integrally to move under hydraulic action
Dynamic, a watt seat pin nail 29 is cut first under the action of upper tapered sleeve 26,33 diameter of external slips under the conical surface impetus of upper tapered sleeve 26
It contacts to form anchoring with internal surface of sleeve pipe to stretching out, pressure continues to increase, and rubber base pin 25 is cut, and dynamic pressure ring 24 moves up compression the
It contacts to form sealing with internal surface of sleeve pipe after three packing element 22-3, the second packing element 22-2 and the first packing element 22-1 deformation, pipe 20 pushes away in glue
Dynamic internal jump ring 27 moves forward, and i.e. realization mechanical internal lock is engaged with pawl 19-2 outside the central tube of central tube 19, and circlip set 11 drives C-shaped
Circlip 10 is mobile, and the internal tooth of C-shaped clamp spring 10 engages with the outer pawl 12-1 of the upper piston on upper piston 12 and realizes mechanical external lock, moves
Pressure ring 24 stops when compressing packing element to position 20-1；Pressure continues growing fluid cylinder 14 and lower cylinder sleeve 18 is pushed to move ahead upper rubber base pin
21 are cut and then compress packing element, and mechanical external lock moves ahead engagement, pressure stabilizing certain time completion seat when design value is arrived in pressure rise
Envelope, lead channel 3-1 is closed in recycling to the feed liquor piston 3 after pressure release in liquid locking-valve rapidly under spring 6 and fluid power effect, forms liquid
The position of lock, mechanical inside and outside lock and upper and lower oil cylinder etc. remains unchanged.
It is as follows to unseal the course of work, above mentions tool, the assemblys such as twin-stage fluid cylinder, sealing and anchor and lower balance mechanism
Motionless with casing-contact, the outer pawl 19-2 of central tube 19 drives internal jump ring 27 to move up, and internal jump ring 27 loses circlip and covers 28 inner cones
Face 28-1 coupling mechanism force, internal jump ring 27 are softened, inner central tube 13 solve sealing mechanism and twin-stage fluid cylinder, sealing and anchor and under
The main bodys such as balance mechanism generate relative displacement, and after deblocking pin 4 is cut, solution sealing mechanism is integrally moved up, in lower contact 39
The O sealing ring at end, which enters in big annular distance 36-1, loses sealing, and the high pressure mixing liquid in closing chamber leaks into oil jacket annulus, and closing piece 38 is fallen
Enter in the reducing slot 39-1 of lower contact 39, oil jacket intercommunicating pore 1-1 is opened, and seat 35, which loses, under slips supports downlink to pass through connecting pin
30, external slips set 31 drives 33 downlink of external slips, disengages with the lower conical surface of upper tapered sleeve 26, passes through under the recycling power effect of packing element 22
Connecting pin 30,31 drive external slips 33 of external slips set move up, and open with the epicone emaciated face of seat 35 under slips, external slips 33 exist
It is recycled under the action of leaf spring 32, realizes deblocking.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, the first, second equal words
It is only intended to the differentiation of title, is not the limitation to technical term, for those skilled in the art, the present invention can have
Various modifications and variations.All within the spirits and principles of the present invention, any modification, equivalent replacement, improvement and so on, should all
It is included within protection scope of the present invention.
Claims (9)
1. a kind of machine liquid inner-lock-type compression packer, which is characterized in that including cock, twin-stage fluid cylinder, liquid locking-valve, interior middle pipe,
Central tube, lower balance mechanism conciliate sealing mechanism, and the orderly connections of above-mentioned all parts, which combines successively to constitute, multiple has independent action
Cavity, each cavity is linked together to form closed cavity, and the closed cavity is arranged between top connection and lower contact, wherein
The closed cavity includes annular chamber, upper fluid cylinder chamber, lower fluid cylinder chamber, lower counter balance pocket and deblocking chamber；
There is upper inlet opening in the top connection, has lower inlet opening in lower contact, oil jacket intercommunicating pore is additionally provided at the top connection；
The closed cavity pours into or injects lubricating oil and anti-corrosion medium by the upper inlet opening of unscrewing cock or liquid locking-valve；
The twin-stage fluid cylinder includes upper piston, upper fluid cylinder, lower piston, lower cylinder sleeve, central tube, manages in glue and gluing pin；It is described
It is integrally fixed to form lower fluid cylinder with gluing pin between pipe and lower cylinder sleeve in glue.
2. machine liquid inner-lock-type compression packer according to claim 1, which is characterized in that the liquid locking-valve setting connects upper
At head or lower contact, the liquid locking-valve includes feed liquor piston, sealing ring, spring and the spring abutment in top connection or the inclined hole of lower contact.
3. machine liquid inner-lock-type compression packer according to claim 1, which is characterized in that the cock is arranged in upper piston
Lead in annular chamber radial outer wall, thread seal connection；Or setting is led in upper fluid cylinder chamber radial outer wall in upper fluid cylinder, screw thread is close
Envelope connection；Or seat is set under slips and is led in lower counter balance pocket radial outer wall, thread seal connection；Or setting is led in lower contact
Unseal the outside at chamber end, thread seal connection.
4. machine liquid inner-lock-type compression packer according to claim 2, which is characterized in that the packing of machine liquid inner-lock-type compression
Device further includes mechanical lock, and the mechanical lock includes mechanical internal lock and mechanical external lock, can phase between the mechanical internal lock and mechanical external lock
It mutually works independently, the mechanical internal lock includes central tube, pipe, internal jump ring and circlip set in glue, and the machinery external lock includes upper work
Plug, circlip set, upper fluid cylinder and C-shaped clamp spring.
5. machine liquid inner-lock-type compression packer according to claim 1, which is characterized in that further include that sealing and anchoring are total
It include dynamic pressure ring, rubber base pin, upper tapered sleeve, external slips, watt seat pin nail, lower cylinder sleeve and packing element at, the sealing and anchorage assembly,
The sealing and anchor act step by step under the promotion of twin-stage fluid cylinder, successively are as follows: (1) a watt seat pin nail is cut, external slips
It extends radially out under the promotion of upper tapered sleeve along inclined-plane and is anchored with internal surface of sleeve pipe, (2) rubber base pin is cut, and is pushed and is pushed in dynamic pressure ring
The deformation of contracting cartridge contacts to form sealing with internal surface of sleeve pipe, and (3) gluing pin is cut, and lower cylinder sleeve is under the promotion of upper fluid cylinder
From other side compression seal packing element.
6. machine liquid inner-lock-type compression packer according to claim 1, which is characterized in that the machine liquid inner-lock-type compression
Packer further includes lower balance mechanism, and the lower balance mechanism is arranged in sealing and anchor bottom end, the lower balance mechanism
Including seat, central tube and lower support base under slips, seat, central tube, lower support base form lower counter balance pocket under the slips.
7. machine liquid inner-lock-type compression packer described in -6 any claims according to claim 1, which is characterized in that the machine liquid
Inner-lock-type compression packer further includes solution sealing mechanism, and the solution sealing mechanism includes top connection, deblocking pin, interior middle pipe, slips
Lower seat, closing piece support body, closing piece, lower lock tube and lower contact or lower lock tube connector.
8. machine liquid inner-lock-type compression packer according to claim 1, which is characterized in that the machine liquid inner-lock-type compression
Packer further includes emptying mechanism, and the emptying mechanism includes oil jacket intercommunicating pore, sealing ring and the upper piston of top connection.
9. machine liquid inner-lock-type compression packer according to claim 1 or 2 or 4, which is characterized in that the liquid locking-valve, machine
It can be worked independently from each other between tool internal lock and mechanical external lock, the liquid locking-valve can be respectively combined and set with mechanical internal lock and mechanical external lock
It sets.
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| CN201910640875.0A CN110259407B (en) | 2019-07-16 | 2019-07-16 | Mechanical-hydraulic internal locking compression packer |
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| CN201910640875.0A CN110259407B (en) | 2019-07-16 | 2019-07-16 | Mechanical-hydraulic internal locking compression packer |
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| CN110259407A true CN110259407A (en) | 2019-09-20 |
| CN110259407B CN110259407B (en) | 2021-06-15 |
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| CN111734340A (en) * | 2020-08-05 | 2020-10-02 | 东营市正能石油科技有限公司 | Integrated packer for oil field exploitation |
| CN112943153A (en) * | 2019-12-11 | 2021-06-11 | 中国石油天然气股份有限公司 | Two-stage hydraulic cylinder type suspension device capable of being unsealed |
| CN115637952A (en) * | 2022-11-11 | 2023-01-24 | 中国石油天然气股份有限公司 | Gas injection double-seal packer and method |
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