CN105781478B - A kind of unlimited hydraulic fluid power expansion type casing external packer assembly - Google Patents
A kind of unlimited hydraulic fluid power expansion type casing external packer assembly Download PDFInfo
- Publication number
- CN105781478B CN105781478B CN201610207615.0A CN201610207615A CN105781478B CN 105781478 B CN105781478 B CN 105781478B CN 201610207615 A CN201610207615 A CN 201610207615A CN 105781478 B CN105781478 B CN 105781478B
- Authority
- CN
- China
- Prior art keywords
- valve
- expansion
- expansion cylinder
- hydraulic fluid
- fluid power
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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 DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/06—Valve arrangements for boreholes or wells in wells
- E21B34/08—Valve arrangements for boreholes or wells in wells responsive to flow or pressure of the fluid obtained
Abstract
The invention belongs to oil field well field of tool, a kind of more particularly to unlimited hydraulic fluid power expansion type casing external packer assembly, the invention provides a kind of unlimited hydraulic fluid power expansion type casing external packer assembly, including connection unit, expansion cell and control unit, described control unit is mainly 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, by routine and process technology processing can be achieved, and time-consuming short, the technical merit requirement to worker is greatly reduced.
Description
Technical field
The invention belongs to insulated outside oil field well technical field of tools, more particularly to a kind of unlimited hydraulic fluid power expansion type casing
Device assembly.
Background technology
External casing packer is that one kind is used 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 onsite application is complicated at present, and the installation use of this valve system is 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.
The content of the invention
Arrangement of the invention by changing valve system, there is provided a kind of unlimited hydraulic fluid power expansion type casing external packer is total
Into 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 a kind of unlimited hydraulic fluid
Power expansion type casing external packer assembly, including connection unit, expansion cell and control unit, described connection unit mainly by
Upper connecting tube, valve body, intermediate connection tube, joint and lower connecting tube are connected in sequence by screw thread；
Described expansion cell is enclosed on the outside of intermediate connection tube, expansion cell include expansion cylinder retaining ring, expansion cylinder tensioner ring,
Expansion cartridge module and expansion cylinder connection ring, described expansion cartridge module are made up of two expansion cylinder joints and expansion cylinder, expansion cylinder
Both 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, expand the annular space being provided between cartridge module and intermediate connection tube for accommodating liquid；
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, protrude from valve interior wall cantilevered out section is provided with 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 and described closing valve element of the through hole where 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, the present invention by the axis of each valve in valve system with packer diameter parallel, by routine and process technology be
Processing can be achieved, and it is time-consuming short, the technical merit requirement to worker is greatly reduced.
2nd, the high pressure-bearing valve system of high pressure resistant expansion cylinder of the present invention and welding technique, can meet that Oil/gas Well is consolidated
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 uses pressure limiting valve pressure limiting in construction.
3rd, the valve system being made up of check valve, opening valve, shutoff valve, has 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.
4th, otherwise like product of the prior art is opened at 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 as to keep the pressure balance inside and outside expansion cylinder,
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 and open the problem of valve is opened in advance.
5th, 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- closing springs, 5- closing valve elements, 6- valve bodies, 7- topping ups
Pin, 8- open 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,
14- expansion cylinder tensioner rings, 15- expansion cylinders, 16- intermediate connection tubes, 17- expansion cylinder connection rings, 18- joints, connecting tube under 19-, 20-
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 mainly 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, form packer center
Rigid connection structure.
Described expansion cell is enclosed on the outside of intermediate connection tube 16, 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 compositions, the both ends of expansion cylinder 15 vulcanize on two expansion cylinder joints 12.Expansion cylinder joint 12 close to valve body 6 passes through connection
Screw 11 is connected with valve body 6, rotary valve 6 during in order to assemble, smoothly completes assembly work.Another expansion cylinder joint 12
It is connected by screw thread with expansion cylinder connection ring 17, compared with existing pin connected mode, further ensures the firm of connection
Property.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
Shoulder, described expansion cylinder connection ring 17 are inserted in and leaned against on described shoulder from the side of joint 18, expansion cartridge module and centre
The annular space for accommodating liquid is provided between connecting 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 16, two through holes are by the ring between intermediate connection tube 16 and 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 individual through hole.It is an extremely common mechanical processing technique to process above-mentioned through hole, and technology difficulty is low, and man-hour is short, because
Processing cost is substantially reduced compared with prior art for this.
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, first, playing centralizing function so that closing valve element can smoothly act, second, 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
The axis of valve closing, is provided with protrude from the inwall of valve body 6 cantilevered out section on topping up pin 7, and topping up pin 7 is provided centrally with blind hole, blind
Hole connects 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, 3 first stress of safety pin 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 closed to remote
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 acts on.
It should be noted that during construction, due to density variation between displacement fluid and drilling fluid, cementing slurry be present, lead
Cause topping up pin 7 to cut the outer annular space of rear sleeve and pressure difference be present 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
It is bigger 1MPa than above-mentioned 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 equipment manufacturing costs
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
6 end, position corresponding with shutoff valve and check valve is respectively arranged with liquid pass hole on 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, is advantageous to the centering of valve body 6 and expansion cylinder joint 12 during 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, and 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 it is uncertain caused by valve pocket and the internal-filling liquid of expansion cylinder 15 in assembling, 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 so as 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, ensures
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, by routine and process technology
Processing is realized, and it is time-consuming short, the technical merit requirement to worker 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 that Oil/gas Well is consolidated
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 uses pressure limiting valve pressure limiting in construction.
By check valve, open valve, the valve system that shutoff valve is formed, there is 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 unlimited hydraulic fluid power expansion type casing external packer assembly, including connection unit, expansion cell and control unit, its
It is characterised by：Described connection unit is by upper connecting tube (1), valve body (6), intermediate connection tube (16), joint (18) and lower connection
Pipe (19) is connected in sequence by screw thread；
Described expansion cell is enclosed on the outside of intermediate connection tube (16), 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 by two expansion cylinder joints (12) and
Expansion cylinder (15) forms, and the both ends of expansion cylinder (15) vulcanize on two expansion cylinder joints (12), close to the expansion cylinder of valve body (6)
Joint (12) is connected by connecting screw (11) with valve body (6), and another expansion cylinder joint (12) is connected by screw thread and expansion cylinder
Connect ring (17) to be connected, expansion cylinder retaining ring (13) and expansion cylinder tensioner ring (14) are sleeved on the outside for expanding cartridge module, described joint
(18) shoulder is provided with the outside of, described expansion cylinder connection ring (17) is inserted in from joint (18) side and leans against described shoulder
On, expand the annular space being provided between cartridge module and intermediate connection tube (16) for accommodating liquid；
Described control unit is made up of opening valve, shutoff valve and check valve (20), and two axis are provided with valve body (6) with
Between connecting tube (16) diameter parallel through hole, ring of two through holes by intermediate connection tube (16) between expansion cell
Shape space and the ft connection of unlimited hydraulic fluid power expansion type casing external packer assembly, open valve and shutoff valve is passed through installed in one
In through hole, check valve (20) is arranged in another through hole, opens valve and shutoff valve is encapsulated in valve body (6) by pressure cap (21)
It is interior, open valve include open valve element (8), open valve pocket (9) and open pin (10), open valve element (8) by open pin (10) and
Valve pocket (9) connection is opened, shutoff valve includes closing valve element (5), closes spring (4) and safety pin (3), closes the tail of valve element (5)
Portion is provided with slide bar, and slide bar passes through the circular hole at pressure cap (21) center and is arranged on by safety pin (3) on pressure cap (21), described
Spring (4) is closed to be enclosed on slide bar and 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
The axis of shutoff valve, protrude from valve body (6) inwall cantilevered out section is provided with 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 connect, 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) end, position corresponding with shutoff valve and check valve is respectively arranged with liquid pass hole on pressure ring (2).
A kind of 2. unlimited hydraulic fluid power expansion type casing external packer assembly according to claim 1, it is characterised in that：With valve
Adjacent expansion cylinder joint (12) point of body (6) is welded on intermediate connection tube (16).
A kind of 3. unlimited hydraulic fluid power expansion type casing external packer assembly according to claim 1, it is characterised in that：It is described
Opening valve element (8) and open and be provided with seal between valve pocket (9), the through hole where described closing valve element (5) it is interior
Seal is provided between wall and described closing valve element (5).
A kind of 4. unlimited hydraulic fluid power expansion type casing external packer assembly according to claim 1, it is characterised in that：It is described
The liquid direction crossed of check valve (20) be outside to the inside by unlimited hydraulic fluid power expansion type casing external packer assembly.
A kind of 5. unlimited hydraulic fluid power expansion type casing external packer assembly according to claim 1, it is characterised in that：It is described
Closing valve element (5) head and the afterbody of described opening valve element (8) offset.
A kind of 6. unlimited hydraulic fluid power expansion type casing external packer assembly according to claim 1, it is characterised in that：It is described
Expansion cylinder (15) be made up of elastomeric material, expansion cylinder (15) is internally provided with high pressure resistant web frame.
A kind of 7. unlimited hydraulic fluid power expansion type casing external packer assembly according to claim 6, it is characterised in that：It is described
High pressure resistant web frame be made up of steel wire or nylon material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610207615.0A CN105781478B (en) | 2016-04-06 | 2016-04-06 | A kind of unlimited hydraulic fluid power expansion type casing external packer assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610207615.0A CN105781478B (en) | 2016-04-06 | 2016-04-06 | A kind of unlimited hydraulic fluid power expansion type casing external packer assembly |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105781478A CN105781478A (en) | 2016-07-20 |
| CN105781478B true CN105781478B (en) | 2017-12-29 |
Family
ID=56395696
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610207615.0A Active CN105781478B (en) | 2016-04-06 | 2016-04-06 | A kind of unlimited hydraulic fluid power expansion type casing external packer assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105781478B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107313742A (en) * | 2017-05-27 | 2017-11-03 | 大庆市晟威机械制造有限公司 | A kind of repeatable expansion type casing external packer utilized |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2532232Y (en) * | 2002-01-30 | 2003-01-22 | 大庆石油管理局 | Balance pressure difference type sleeve external packer |
| CN2654847Y (en) * | 2003-11-11 | 2004-11-10 | 新疆石油管理局钻井工艺研究院 | External packer for casing |
| US8066065B2 (en) * | 2009-08-03 | 2011-11-29 | Halliburton Energy Services Inc. | Expansion device |
| CN202000956U (en) * | 2011-02-18 | 2011-10-05 | 东营百华石油技术开发有限公司 | External casing packer |
| DK2570588T3 (en) * | 2011-09-13 | 2015-06-29 | Welltec As | An annular barrier with aksialkraftmekanisme |
| CN102747979A (en) * | 2012-08-01 | 2012-10-24 | 山东胜油固井工程技术有限公司 | Bidirectional self-locking type external casing packer |
-
2016
- 2016-04-06 CN CN201610207615.0A patent/CN105781478B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN105781478A (en) | 2016-07-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| NO331859B1 (en) | Apparatus for relieving fluid pressure in annulus between nested feeding tubes | |
| CN202266237U (en) | Stage cementing device for oil well completion | |
| CN101929317A (en) | Undersize-hole oil pipe plugging device | |
| US6810955B2 (en) | Gas lift mandrel | |
| CN107701147A (en) | A kind of annular pressure downhole control valve | |
| CN102061901B (en) | Compensation type multi-purpose annular blowout preventer | |
| CN101956540B (en) | Novel drill rod valve | |
| CN105781478B (en) | A kind of unlimited hydraulic fluid power expansion type casing external packer assembly | |
| CN201902192U (en) | Float valve type underground blowout preventer | |
| CN102650200A (en) | Shot-free unidirectional blocking valve | |
| CN106089085A (en) | A kind of machinery vertical drilling tool | |
| CN101440702B (en) | Sieve tube well completion method under insufficient balance condition and temporary blocking type sieve tube | |
| CN201843567U (en) | Tubing plug capable of passing small hole | |
| CN108999589B (en) | Downhole blowout preventer for workover operation | |
| CN108240205A (en) | Down-hole casing twin-stage bores expansion device and its operational method | |
| US4306624A (en) | System for preventing hydrate plug formation in gas wells | |
| CN105239956A (en) | Wedge type sealer | |
| CN201723196U (en) | Self-sealing setting ball seat | |
| CN202090848U (en) | Operating pipe column for plugging water underground | |
| CN209687456U (en) | Minor diameter gradually deblocking Packer for blocking water | |
| CN101881142B (en) | Self-sealing setting ball seat | |
| CN111894559B (en) | Inner channel decompression restrictor | |
| CN209483229U (en) | Completion tubular column and production system | |
| CN220828233U (en) | Double-pipe water injection pipe column for high-temperature deep well | |
| CN107313742A (en) | A kind of repeatable expansion type casing external packer utilized |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |