CN107313742A - A kind of repeatable expansion type casing external packer utilized - Google Patents
A kind of repeatable expansion type casing external packer utilized Download PDFInfo
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- CN107313742A CN107313742A CN201710390900.5A CN201710390900A CN107313742A CN 107313742 A CN107313742 A CN 107313742A CN 201710390900 A CN201710390900 A CN 201710390900A CN 107313742 A CN107313742 A CN 107313742A
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- expansion cylinder
- valve body
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- 239000000203 mixture Substances 0.000 claims abstract description 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 29
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 28
- 239000004917 carbon fiber Substances 0.000 claims description 28
- 239000007788 liquid Substances 0.000 claims description 18
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 12
- 229910052799 carbon Inorganic materials 0.000 claims description 12
- 239000002131 composite material Substances 0.000 claims description 11
- 239000000835 fiber Substances 0.000 claims description 11
- 239000003822 epoxy resin Substances 0.000 claims description 8
- 229920000647 polyepoxide Polymers 0.000 claims description 8
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 229920002748 Basalt fiber Polymers 0.000 claims description 3
- 239000004677 Nylon Substances 0.000 claims description 3
- 210000000481 breast Anatomy 0.000 claims description 3
- 239000013536 elastomeric material Substances 0.000 claims description 3
- 229920001778 nylon Polymers 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 13
- 238000012545 processing Methods 0.000 abstract description 10
- 238000005516 engineering process Methods 0.000 abstract description 6
- 238000010276 construction Methods 0.000 description 10
- 239000012530 fluid Substances 0.000 description 9
- 238000005520 cutting process Methods 0.000 description 7
- 238000006073 displacement reaction Methods 0.000 description 5
- 238000003466 welding Methods 0.000 description 5
- 230000007797 corrosion Effects 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 4
- 238000005553 drilling Methods 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 238000003754 machining Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000012856 packing Methods 0.000 description 3
- 239000002002 slurry Substances 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 230000002706 hydrostatic effect Effects 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 210000000988 bone and bone Anatomy 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 210000001161 mammalian embryo Anatomy 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
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- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- E21B33/127—Packers; Plugs with inflatable sleeve
- E21B33/1277—Packers; Plugs with inflatable sleeve characterised by the construction or fixation of the sleeve
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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)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The invention belongs to oil field well field of tool, more particularly to a kind of repeatable expansion type casing external packer utilized, the invention provides a kind of repeatable expansion type casing external packer utilized, including connection unit, expansion cell and control unit, described control unit is main by opening valve, shutoff valve and check valve composition, the through hole of the diameter parallel of two axis and intermediate connection tube is provided with valve body, two through holes are by the annular space between intermediate connection tube and expansion cell and the ft connection of the present invention, open valve and shutoff valve is arranged in a through hole, check valve is arranged in another through hole, the inner side of described valve body is provided with topping up pin by screw thread.The present invention by the axis of each valve in valve system with packer diameter parallel, be that processing can be achieved by conventional and process technology, and time-consuming short, the technical merit requirement to workman is greatly reduced.
Description
Technical field
The invention belongs to oil field well technical field of tools, more particularly to a kind of repeatable expansion type casing covering utilized
Every device.
Background technology
External casing packer is a kind of for petroleum industry oil gas well cementing operation or completion tool, is prevented using mechanical system
Or the important means that control oil, gas and water are mutually altered, it is mainly made up of expansion cylinder, intermediate connection tube and valve system etc., by it when going into the well
The appropriate location of sleeve pipe tubing string is connected to, the rise by hydraulic coupling in sleeve pipe expands expansion cylinder, to reach annular space outside control pipe
Purpose.The valve architecture of the external casing packer of current onsite application is complicated, and this valve system installs and uses laterally positioned, i.e.,
The axis direction of valve is vertical in the axial direction of external packer of pipe, therefore processing and manufacturing difficulty is big, and time-consuming, and processing cost is very
It is high.In addition, this valve system must use welding procedure in the fabrication process, not only the requirement to technological level is high, and valve system
Overall bearing capacity can therefore be restricted.
In addition, during packer work, it is often necessary to stop the several months even more than 1 year in underground, and existing steel is insulated
Device can not only be difficult to dismounting and change packing element, and the size essence of each key structure after long-time installation by serious corrosion
Degree cannot guarantee that therefore, existing packer is used only once mostly, it is impossible to reused, and then causes packer
Application cost remains high.
The content of the invention
The present invention by changing the arrangement of valve system there is provided a kind of repeatable expansion type casing external packer utilized,
To solve the problems mentioned in the above background technology.
Technical problem solved by the invention is realized using following technical scheme：The invention provides the repeatable profit of one kind
Expansion type casing external packer, including connection unit, expansion cell and control unit, described connection unit are main by upper
Connecting tube, valve body, intermediate connection tube, joint and lower connecting tube are connected in sequence by screw thread, wherein, valve body, middle connection
Pipe and joint are made by carbon fibre composite；
The side wall for each part being made up of carbon fibre composite is double-deck carbon fiber structural, and every layer of carbon fiber structural is equal
It is made up of the carbon fiber bundle that being bonded by epoxy resin, wherein, constitute the length of each stock carbon fiber bundle of internal layer carbon fiber structural
Degree direction is consistent with the axis direction of packer, and each stock carbon fiber bundle for constituting outer layer carbon fiber structural is spirally wound on internal layer
The outside of carbon fiber structural；
Added in described epoxy resin for improving the short basalt fiber of epoxy resin intensity, by carbon fiber composite
Expect that screw thread and groove structure on each part being made are required to be processed by formed in mould mode；
Described expansion cell is enclosed on the outside of intermediate connection tube, expansion cell include expansion cylinder retaining ring, expansion cylinder tensioner ring,
Cartridge module and expansion cylinder connection ring are expanded, described expansion cartridge module is made up of two expansion cylinder joints and expansion cylinder, expansion cylinder
Two ends vulcanize on two expansion cylinder joints, be connected close to the expansion cylinder joint of valve body by connecting screw with valve body, it is another
Individual expansion cylinder joint is connected by screw thread with expansion cylinder connection ring, and expansion cylinder retaining ring and expansion cylinder tensioner ring are sleeved on expansion cartridge module
Outside, shoulder is provided with the outside of described joint, described expansion cylinder connection ring is inserted in from joint side and leaned against described
Shoulder on, annular space for accommodating liquid is provided between expansion cartridge module and intermediate connection tube；
Described control unit is mainly made up of opening valve, shutoff valve and check valve, be provided with valve body two axis with
The through hole of the diameter parallel of intermediate connection tube, two through holes are by the annular space between intermediate connection tube and expansion cell
With the ft connection of the present invention, open valve and shutoff valve is arranged in a through hole, check valve is arranged on another through hole
It is interior, open valve and shutoff valve is encapsulated in valve body by pressure cap, opening valve includes opening valve element, open valve pocket and opening pin, beats
Valve opening core is connected by opening pin with opening valve pocket, and shutoff valve includes closing valve element, closes spring and safety pin, closes valve element
Afterbody is provided with slide bar, and slide bar passes through the circular hole at pressure cap center and is arranged on by safety pin on pressure cap, described closing spring
It is enclosed on slide bar and between the head of pressure cap and closing valve element；
The inner side of described valve body is provided with topping up pin by screw thread, and the axis of topping up pin is perpendicular to opening valve or shutoff valve
Axis, be provided with protrude from valve interior wall cantilevered out section on topping up pin, topping up pin is provided centrally with blind hole, and blind hole is with opening
Space connection between valve and shutoff valve, the distance between the bosom of blind hole and the axis of valve body are less than in the minimum of valve body
Footpath；
A pressure ring is provided with the outside of the end of valve body, upper connecting tube, pressure ring is arranged on the end of valve body, pressure by bolt
Position corresponding with shutoff valve and check valve is respectively arranged with liquid pass hole on ring.
The expansion cylinder tap points adjacent with valve body are welded on intermediate connection tube.Between described opening valve element and opening valve pocket
Seal is provided with, sealing is provided between the inwall of the through hole where described closing valve element and described closing valve element
Part.The liquid direction of crossing of described check valve is by outside to the inside of the present invention.The head of described closing valve element with it is described
The afterbody for opening valve element offsets.Described expansion cylinder is made up of elastomeric material, and expansion cylinder is internally provided with high pressure resistant reinforcement bone
Frame.Described high pressure resistant web frame is made up of steel wire or nylon material.
Beneficial effects of the present invention are：
1st, each main components in the present invention are made of carbon fiber, compared with traditional steel design, carbon fiber
With many excellent performances such as antirust, light weight, corrosion-resistant, after packer long-time use, each main components still will not
Corrosion and damage, will not also die in an accident or political incident to dismantle because of rust, after packer takes out, it is only necessary to change packing element and indivedual annexes can be by packer
Recycling, saves the use cost of packer.
2nd, the present invention by the axis of each valve in valve system with packer diameter parallel, be by conventional and process technology
Processing can be achieved, and it is time-consuming short, the technical merit requirement to workman is greatly reduced.
3rd, the high pressure-bearing valve system of high pressure resistant expansion cylinder of the present invention and welding technique, can meet Oil/gas Well and consolidate
The limiting pressure standard of well construction operation, therefore the pressure size in construction is not particularly limited.And conventionally, as
The bearing capacity of same device is limited, it usually needs use pressure limiting valve pressure limiting in construction.
4th, the valve system being made up of check valve, opening valve, shutoff valve, with the work(to the automatic compensation of environmental pressure and balance
Can, so the present invention does not do particular/special requirement to the density of drilling fluid, cementing slurry displacement fluid.And in the prior art, it is desirable to
Medium pipe inside and outside differential pressure as caused by density is generally no greater than 5MPa, and this is difficult to meet field requirement.
5th, otherwise like product of the prior art is opened in assembling, it is necessary to fill oily or other liquid in device
Valve can be opened in advance., can be in packer and the check valve that the present invention is set has connected the inside of annular space and packer outside sleeve pipe
While with sleeve pipe G.I.H, the liquid in annular space is introduced in expansion cylinder, so that the pressure balance inside and outside expansion cylinder is kept,
This structure improve, not only avoid existing external casing packer assembling when as caused by valve pocket and expansion cylinder internal-filling liquid not
Certainty, and avoid producing the problem of opening valve is opened in advance.
6th, valve of the invention by two groups of separate valve groups into, simple in construction, easy to process and welding technique, because
This weldability energy no requirement (NR) to material, and bearing strength is big.
Brief description of the drawings
Fig. 1 is the structural representation of the present invention；
Fig. 2 is to open the partial enlarged drawing at valve and shutoff valve.
In figure, the upper connecting tubes of 1-, 2- pressure rings, 3- safety pins, 4- closes spring, and 5- closes valve element, 6- valve bodies, 7- topping ups
Pin, 8- opens valve element, and 9- opens valve pocket, and 10-, which is opened, to be sold, 11- connecting screws, 12- expansion cylinder joints, 13- expansion cylinder retaining rings,
Connecting tube, 20- under 14- expansion cylinder tensioner rings, 15- expansion cylinders, 16- intermediate connection tubes, 17- expansion cylinder connection rings, 18- joints, 19-
Check valve, 21- pressure caps.
Embodiment
The present invention is described further below in conjunction with accompanying drawing：
The present embodiment includes connection unit, expansion cell and control unit, and described connection unit is main by upper connecting tube
1st, valve body 6, intermediate connection tube 16, joint 18 and lower connecting tube 19 are connected in sequence by screw thread, constitute packer center
Rigid connection structure.Wherein, valve body 6, intermediate connection tube 16 and joint 18 are made by carbon fibre composite；
Each part being made up of carbon fibre composite is hollow revolving meber, and the side wall of each part is double-deck carbon fiber
Structure, every layer of carbon fiber structural is made up of the carbon fiber bundle that being bonded by epoxy resin, wherein, constitute internal layer carbon fiber knot
The length direction of each stock carbon fiber bundle of structure is consistent with the axis direction of packer, constitutes each stock carbon of outer layer carbon fiber structural
Fibre bundle is spirally wound on the outside of internal layer carbon fiber structural.Two layers of Carbon fibe beam causes each part in two sides of axial and circumferential
To enough intensity is obtained, so as to ensure that each part will not ftracture along the gap between carbon fiber bundle.
Each main components of packer are made of carbon fibre composite, compared with steel, carbon fibre composite
On the premise of the basic performance of packer is met, also with the excellent properties such as antirust, light weight, corrosion-resistant, even if for a long time
In the adverse circumstances of underground, also can the dimensional accuracy of easy removal and part be not damaged so that packer can be with
It is used repeatedly, reduces the cost put into during using packer.
For structure tools such as the helicitic textures and groove that are further ensured that on each part being made of carbon fibre composite
There are enough shearing strengths, improve the design safety factor (DSF) of part, it is necessary to be added in described epoxy resin for improving ring
The short basalt fiber of oxygen mechanical strength of resin.Meanwhile, the structure such as screw thread and groove is required to be added by formed in mould mode
Work, mould molding is processed into after embryo material, can carry out the last adjustment of parts size precision by machining mode again.Herein never
It can be processed by machining means, because machining can cut off carbon fiber bundle, the integrality of carbon fiber be destroyed, so as to lead
The intensity of part is caused to have a greatly reduced quality.
It should also be noted that, compared with traditional machining mode, using formed in mould mode production packer
Part, the processing efficiency of part can be significantly improved, so as to effectively improve the overall processing efficiency of packer.
Described expansion cell is enclosed on the outside of intermediate connection tube, and expansion cell includes expansion cylinder retaining ring 13, expansion cylinder is swollen
Ring 14, expansion cartridge module and expansion cylinder connection ring 17, described expansion cartridge module is by two expansion cylinder joints 12 and expansion cylinder 15
Composition, the two ends of expansion cylinder 15 vulcanize on two expansion cylinder joints 12.Expansion cylinder joint 12 close to valve body 6 is by connecting spiral shell
Silk 11 is connected with valve body 6, and rotary valve 6 during in order to assemble smoothly complete assembly work.Another expansion cylinder joint 12 leads to
Cross screw thread with expansion cylinder connection ring 17 to be connected, compared with existing pin connected mode, further ensure the steadiness of connection.
Expansion cylinder retaining ring 13 and expansion cylinder tensioner ring 14 are sleeved on the outside of expansion cartridge module, and the outside of described joint 18 is provided with platform
Shoulder, described expansion cylinder connection ring 17 is inserted in and leaned against on described shoulder from the side of joint 18, and expansion cartridge module and centre connect
The annular space for accommodating liquid is provided between adapter 16.
Described control unit is mainly made up of opening valve, shutoff valve and check valve 20, and two axis are provided with valve body 6
With the through hole of the diameter parallel of intermediate connection tube, two through holes are by the annular between intermediate connection tube 16 and expansion cell
Space and the ft connection of the present invention, open valve and shutoff valve is arranged in a through hole, and check valve 20 is arranged on another
In through hole.The above-mentioned through hole of processing is an extremely common mechanical processing technique, and technology difficulty is low, and man-hour is short, therefore
Processing cost is substantially reduced compared with prior art.
Open valve and shutoff valve is encapsulated in valve body 6 by pressure cap 21, opening valve includes opening valve element 8, opens the and of valve pocket 9
Pin 10 is opened, valve element 8 is opened and is connected by opening pin 10 with opening valve pocket 9, shutoff valve includes closing valve element 5, closes the and of spring 4
Safety pin 3.The afterbody for closing valve element 5 is provided with slide bar, and slide bar passes through the circular hole at the center of pressure cap 21 and is arranged on by safety pin 3
On pressure cap 21, described closing spring 4 is enclosed on slide bar and between the head of pressure cap 21 and closing valve element 5.The work of slide bar
With there is two, one has been centralizing function so that closing valve element can smoothly act, and two be the diameter of section by adjusting slide bar
The difference in areas for the bearing area for opening the both sides of valve element 5 can be adjusted, and then plays the work that adjustment safety pin 3 cuts limit pressure
With.
The inner side of described valve body 6 is provided with topping up pin 7 by screw thread, and the axis of topping up pin 7 is perpendicular to opening valve or pass
It is provided with protrude from the inwall of valve body 6 cantilevered out section on the axis of valve closing, topping up pin 7, topping up pin 7 is provided centrally with blind hole, blind
Hole is connected with opening the space between valve and shutoff valve, and the distance between the bosom of blind hole and the axis of valve body 6 are less than valve
The minimum diameter of body 6.
Before topping up pin 7 is destroyed, it can play when preventing setting of casing, the surge pressure of drilling fluid enters the effect of valve pocket.Apply
In man-hour, the cantilevered out end of topping up pin 7 is severed from inside pipe casing with for cement plug, blind hole becomes through hole, and inside pipe casing is with opening
Valve pocket is connected, and displacement fluid, which enters, opens valve pocket；During set overpressure is stepped up, the first stress of safety pin 3 is cut
It is disconnected, close the release of valve element 5 and moved under pressure to away from the direction for opening valve；Pressure continues to raise, when opening valve pocket
When interior pressure reaches the cutting limiting value for opening pin 10, open the stress of pin 10 and cut, open valve element 8 and discharge and to away from closing
The direction motion of valve element 5, opens valve and opens, displacement fluid enters in expansion cylinder 15, expands expansion cylinder 15 and expansion cylinder tensioner ring 14.
After the pressure in sleeve pipe discharges, close valve element 5 and moved in the presence of spring 4 is closed to close to the direction for opening valve, and then
Cut off and cross liquid passage at topping up pin 7, so as to completely cut off sleeve pipe and the space in expansion cylinder, realize that packing is acted on.
It should be noted that during construction, due to there is density variation between displacement fluid and drilling fluid, cementing slurry, leading
Cause topping up pin 7 to cut the outer annular space of rear sleeve and there is pressure difference with opening in valve pocket, to prevent safety pin 3 from being cut under the differential pressure action
It is disconnected, by adjusting the sectional area of safety pin 3 or closing the effective pressure area of valve element 5, the cutting pressure of safety pin 3 is set as
Than the above-mentioned big 1MPa of pressure difference.The cutting pressure for opening pin 10 is set as 15-20MPa with same method, the scope was both protected
Opening pin 10 is demonstrate,proved and has been unlikely to unexpected cutting, allowd again and open the relatively easy cutting of pin 10 to save device fabrication cost
And construction cost.
The end of valve body 6, the outside of upper connecting tube 1 are provided with a pressure ring 2, and it is to install each valve on protection valve body 6 that it, which is acted on,
End face, prevent from being damaged, at the same for close the afterbody of valve element 5 slide bar activity space is provided.Pressure ring 2 is arranged on valve body by bolt
Position corresponding with shutoff valve and check valve is respectively arranged with liquid pass hole on 6 end, pressure ring 6.
The expansion cylinder joint 12 point adjacent with valve body 6 is welded on intermediate connection tube 16.So that expansion cylinder joint 12 and centre
Connecting tube 16 has good centering, the centering of valve body 6 and expansion cylinder joint 12 when being conducive to assembling.
Seal, the described insertion closed where valve element 5 are provided between described opening valve element 8 and opening valve pocket 9
Seal is provided between the inwall in hole and described closing valve element 5.
The liquid direction of crossing of described check valve 20 is by outside to the inside of the present invention.Like product of the prior art exists
, it is necessary to fill oily or other liquid in device during assembling, otherwise opening valve can open in advance.And the check valve that the present invention is set
20 have connected the inside of the annular space and packer outside sleeve pipe, can be while packer is with sleeve pipe G.I.H, by annular space
Liquid is introduced in expansion cylinder 15, so as to keep the pressure balance inside and outside expansion cylinder 15, this structure is improved, and is not only avoided existing
External casing packer in assembling due to uncertain caused by valve pocket and the internal-filling liquid of expansion cylinder 15, and avoid producing opening
The problem of valve is opened in advance.
The head of described closing valve element 5 and the afterbody of described opening valve element 8 offset.After the cutting of safety pin 3, open
Before pin 10 is cut, when the liquid column hydrostatic pressure of casing annulus is more than liquid column hydrostatic pressure in sleeve pipe, in the presence of pressure difference, close
The oriented trend for playing valve opening position motion of valve element 5, offsets due to closing valve element 5 with opening both valve elements 8, so closing valve element 5
Promote and open valve element 8 to participate in cutting the action for opening pin 10 so that the action for opening valve element 8 is more reliable.
Described expansion cylinder 15 is made up of elastomeric material, and expansion cylinder 15 is internally provided with high pressure resistant web frame, it is ensured that
The load performance of expansion cylinder 15.Described high pressure resistant web frame is made up of steel wire or nylon material.
The present invention by the axis of each valve in valve system with packer diameter parallel, pass through conventional and process technology
Processing is realized, and it is time-consuming short, the technical merit requirement to workman is greatly reduced.
The high pressure-bearing valve system of high pressure resistant expansion cylinder 15 of the present invention and welding technique, can meet Oil/gas Well and consolidate
The limiting pressure standard of well construction operation, therefore the pressure size in construction is not particularly limited.And conventionally, as
The bearing capacity of same device is limited, it usually needs use pressure limiting valve pressure limiting in construction.
The valve system being made up of check valve, opening valve, shutoff valve, with the function to the automatic compensation of environmental pressure and balance,
So the present invention does not do particular/special requirement to the density of drilling fluid, cementing slurry displacement fluid.And in the prior art, it is desirable to medium
Pipe inside and outside differential pressure is generally no greater than 5MPa as caused by density, and this is difficult to meet field requirement.
The valve of the present invention by two groups of separate valve groups into, simple in construction, easy to process and welding technique, therefore
Weldability energy no requirement (NR) to material, and bearing strength is big.
Claims (7)
1. a kind of repeatable expansion type casing external packer utilized, including connection unit, expansion cell and control unit, it is special
Levy and be：Described connection unit is main by upper connecting tube (1), valve body (6), intermediate connection tube (16), joint (18) and lower company
Adapter (19) is connected in sequence by screw thread, wherein, valve body (6), intermediate connection tube (16) and joint (18) are by carbon fiber
Composite is made；
The side wall for each part being made up of carbon fibre composite is double-deck carbon fiber structural, and every layer of carbon fiber structural is served as reasons
The carbon fiber bundle that epoxy resin is bonded is made, wherein, constitute the length side of each stock carbon fiber bundle of internal layer carbon fiber structural
Consistent to the axis direction with packer, each stock carbon fiber bundle for constituting outer layer carbon fiber structural is spirally wound on internal layer carbon fibre
Tie up the outside of structure；
Added in described epoxy resin for improving the short basalt fiber of epoxy resin intensity, by carbon fibre composite system
Into each part on screw thread and groove structure be processed by formed in mould mode；
Described expansion cell is enclosed on the outside of intermediate connection tube, and expansion cell includes expansion cylinder retaining ring (13), expansion cylinder tensioner ring
(14), expansion cartridge module and expansion cylinder connection ring (17), described expansion cartridge module is by two expansion cylinder joints (12) and expansion
Cylinder (15) composition, the two ends of expansion cylinder (15) vulcanize on two expansion cylinder joints (12), close to the expansion cylinder joint of valve body (6)
(12) it is connected by connecting screw (11) with valve body (6), another expansion cylinder joint (12) passes through screw thread and expansion cylinder connection ring
(17) it is connected, expansion cylinder retaining ring (13) and expansion cylinder tensioner ring (14) are sleeved on the outside for expanding cartridge module, described joint (18)
Outside be provided with shoulder, described expansion cylinder connection ring (17) is inserted in and leaned against on described shoulder from joint (18) side,
The annular space for accommodating liquid is provided between expansion cartridge module and intermediate connection tube (16)；
Described control unit is mainly made up of opening valve, shutoff valve and check valve (20), and two axis are provided with valve body (6)
With the through hole of the diameter parallel of intermediate connection tube, ring of two through holes by intermediate connection tube (16) between expansion cell
Shape space and the ft connection of the present invention, open valve and shutoff valve is arranged in a through hole, and check valve (20) is arranged on another
In one through hole, open valve and shutoff valve and be encapsulated in by pressure cap (21) in valve body (6), open valve include opening valve element (8),
Open valve pocket (9) and open pin (10), open valve element (8) and be connected by opening pin (10) with opening valve pocket (9), shutoff valve includes
Close valve element (5), close spring (4) and safety pin (3), the afterbody for closing valve element (5) is provided with slide bar, and slide bar passes through pressure cap
(21) circular hole at center and by safety pin (3) be arranged on pressure cap (21) on, described closing spring (4) is enclosed on slide bar and position
Between the head of pressure cap (21) and closing valve element (5)；
The inner side of described valve body (6) is provided with topping up pin (7) by screw thread, the axis of topping up pin (7) perpendicular to open valve or
It is provided with protrude from valve body (6) inwall cantilevered out section on the axis of shutoff valve, topping up pin (7), topping up pin (7) are provided centrally with
Blind hole, blind hole and the space opened between valve and shutoff valve are connected, between the axis of the bosom of blind hole and valve body (6) away from
From the minimum diameter less than valve body (6)；
A pressure ring (2) is provided with the outside of the end of valve body (6), upper connecting tube (1), pressure ring (2) is arranged on valve body by bolt
(6) position corresponding with shutoff valve and check valve is respectively arranged with liquid pass hole on end, pressure ring (2).
2. a kind of repeatable expansion type casing external packer utilized according to claim 1, it is characterised in that：With valve body
(6) adjacent expansion cylinder joint (12) point is welded on intermediate connection tube (16).
3. a kind of repeatable expansion type casing external packer utilized according to claim 1, it is characterised in that：Described
Open and be provided with seal, the inwall of the through hole where described closing valve element (5) between valve element (8) and opening valve pocket (9)
Seal is provided between described closing valve element (5).
4. a kind of repeatable expansion type casing external packer utilized according to claim 1, it is characterised in that：Described
The liquid direction of crossing of check valve (20) is by outside to the inside of the present invention.
5. a kind of repeatable expansion type casing external packer utilized according to claim 1, it is characterised in that：Described
The head and the afterbody of described opening valve element (8) for closing valve element (5) offset.
6. a kind of repeatable expansion type casing external packer utilized according to claim 1, it is characterised in that：Described
Expansion cylinder (15) is made up of elastomeric material, and expansion cylinder (15) is internally provided with high pressure resistant web frame.
7. a kind of repeatable expansion type casing external packer utilized according to claim 6, it is characterised in that：Described
High pressure resistant web frame is made up of steel wire or nylon material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| US20030037932A1 (en) * | 2001-08-27 | 2003-02-27 | Brett Guillory | Drillable inflatable packer & methods of use |
| EP1757770A1 (en) * | 2005-08-25 | 2007-02-28 | Services Petroliers Schlumberger (Sps) | Method and apparatus to set a plug in a wellbore |
| CN101539010A (en) * | 2008-03-18 | 2009-09-23 | 陶亮 | Thermal-prestressed fusion casing for heavy-oil thermal recovery process, and using method thereof |
| CN103906886A (en) * | 2011-10-07 | 2014-07-02 | 艾尼股份公司 | Tubular apparatus for the continuous completion of hydrocarbon wells, and corresponding laying method |
| CN105745300A (en) * | 2013-11-18 | 2016-07-06 | 路博润油田解决方案公司 | Method to consolidate solid materials during subterranean treatment operations |
| CN105781478A (en) * | 2016-04-06 | 2016-07-20 | 大庆昊运橡胶制品有限公司 | Pressure-limit-free hydraulic expansion type external casing packer assembly |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030037932A1 (en) * | 2001-08-27 | 2003-02-27 | Brett Guillory | Drillable inflatable packer & methods of use |
| EP1757770A1 (en) * | 2005-08-25 | 2007-02-28 | Services Petroliers Schlumberger (Sps) | Method and apparatus to set a plug in a wellbore |
| CN101539010A (en) * | 2008-03-18 | 2009-09-23 | 陶亮 | Thermal-prestressed fusion casing for heavy-oil thermal recovery process, and using method thereof |
| CN103906886A (en) * | 2011-10-07 | 2014-07-02 | 艾尼股份公司 | Tubular apparatus for the continuous completion of hydrocarbon wells, and corresponding laying method |
| CN105745300A (en) * | 2013-11-18 | 2016-07-06 | 路博润油田解决方案公司 | Method to consolidate solid materials during subterranean treatment operations |
| CN105781478A (en) * | 2016-04-06 | 2016-07-20 | 大庆昊运橡胶制品有限公司 | Pressure-limit-free hydraulic expansion type external casing packer assembly |
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Application publication date: 20171103 |