CN108086941A - Selective cementing unit - Google Patents
Selective cementing unit Download PDFInfo
- Publication number
- CN108086941A CN108086941A CN201711279468.9A CN201711279468A CN108086941A CN 108086941 A CN108086941 A CN 108086941A CN 201711279468 A CN201711279468 A CN 201711279468A CN 108086941 A CN108086941 A CN 108086941A
- Authority
- CN
- China
- Prior art keywords
- ball seat
- tube body
- cementing unit
- selectivity
- unit according
- 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.)
- Granted
Links
- 238000001727 in vivo Methods 0.000 claims description 3
- 239000011148 porous material Substances 0.000 claims description 3
- 239000004744 fabric Substances 0.000 claims 1
- 239000004568 cement Substances 0.000 abstract description 22
- XQCFHQBGMWUEMY-ZPUQHVIOSA-N Nitrovin Chemical compound C=1C=C([N+]([O-])=O)OC=1\C=C\C(=NNC(=N)N)\C=C\C1=CC=C([N+]([O-])=O)O1 XQCFHQBGMWUEMY-ZPUQHVIOSA-N 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 238000013475 authorization Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001351 cycling effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005649 metathesis reaction Methods 0.000 description 1
- 210000002445 nipple Anatomy 0.000 description 1
- 239000007787 solid Substances 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
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices or the like
-
- 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
- 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
-
- 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
- E21B2200/00—Special features related to earth drilling for obtaining oil, gas or water
- E21B2200/04—Ball valves
Landscapes
- 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 present invention relates to a kind of selective cementing units.The selection cementing unit includes tube body, in tube body first the second ball seat of ball seat is equipped with along the axially spaced-apart of tube body, selective cementing unit further includes the spring for being used to support the second ball seat, first ball seat is fixedly connected with tube body, second ball seat can be along the axial movement of tube body, circulation port is additionally provided on tube body, second ball seat has the close stance for closing circulation port during movement and is moved to bottom with the open position in ON cycle hole, the tube body is additionally provided with pressurizing port between the open position of the first ball seat and the second ball seat, and tube body is equipped with packer in the outside of pressurizing port.When filling cement, second ball seat is subject to the pressure of cement to be moved to the bottom of cementing unit, circulation port is opened, cement passes through between circulation port sleeve pipe and the borehole wall, so as to selectively fill cement to the annular space on packer top, it realizes the well cementing operation to annular space more than packer, packer lower part is avoided cement plug occur.
Description
Technical field
The present invention relates to a kind of selective cementing units.
Background technology
Well cementing operation is the tripping in casing into well, and the construction of the annular space injection cement between wellbore and casing is made
Industry is the important operation in drilling process, and its main purpose is the casing in protection and support oil/gas well, insulates oil, gas and water
Wait stratum.Selective injection cement is selective well cementing operation in a certain section of annular space between casing and wellbore,
Selectivity well cementation can make to keep optimal connection condition between oil-gas Layer and pit shaft, while oil reservoir is controlled to go out sand, prevent the borehole wall from collapsing
It collapses.
Authorization Notice No. is CN205858270U, and authorized announcement date is that the Chinese utility model patent of 2017.01.04 discloses
A kind of selective cementing unit, the selection cementing unit include casing inner tube and casing outer tube, casing inner tube, casing outer tube
Upper end equipped with upper slider and upper diaphragm valve, in the lower end of casing inner tube, casing outer tube equipped with lower slider and lower diaphragm valve,
There is the passage for connecting diaphragm valve and lower diaphragm valve between casing inner tube and casing outer tube.
For above-mentioned selectivity cementing unit using double-layer sleeve structure, the cement of well cementation can be by between two layers of casing
Passage bypasses payzone, realizes the purpose for the selectivity well cementation cemented the well above payzone with lower section.But above-mentioned selectivity
Cementing unit is in well cementing process, partially due to the gravity metathesis of cement, water can be formed in casing part below packer
The bod influences subsequent production operation, and the path clearance between bilayer sleeve is smaller, and pressure is larger when filling cement, solid
It easily leads to and builds the pressure during well operations, leakage stratum can be pressed when serious.
The content of the invention
It is an object of the invention to provide a kind of selective cementing unit, to solve selectivity well cementation dress of the prior art
It puts the casing cement plug formed below the problem of.
In order to solve the above-mentioned technical problem, the technical solution of selective cementing unit of the invention is：
Scheme 1：A kind of selectivity cementing unit including tube body, is set along the axially spaced-apart of tube body there are two ball seat in tube body, two
Ball seat is the first ball seat close to its bottom and the second ball seat at the top of tube body, and the second ball seat has to make the first ball
The pitching of seat by passage, selective cementing unit further includes the spring for being used to support the second ball seat, the first ball seat and tube body
Be fixedly connected, the second ball seat can along the axial movement of tube body, be additionally provided on tube body for plus cemented circulation port, the second ball seat
During movement there is the close stance for closing circulation port and moved to bottom with the open position in ON cycle hole, the tube body
Pressurizing port is additionally provided between the open position of the first ball seat and the second ball seat, tube body is equipped with packer in the outside of pressurizing port.
The advantageous effect of the technical solution is：The first ball seat and the second ball seat are equipped at intervals in tube body, the second ball seat leads to
Spring supporting is crossed, when filling cement, the second ball seat is subject to the bottom of pressure to the selective cementing unit of cement to move, Xun Huan
Hole is opened, and cement passes through between circulation port sleeve pipe and the borehole wall, so as to selectively empty to the annular on packer top
Between fill cement, realize the well cementing operation to annular space more than packer, packer lower part avoided cement plug occur, the choosing
Selecting property cementing unit is simple in structure, good reliability.
Scheme 2：Selective cementing unit according to scheme 1, the outer circumferential surface of second ball seat and the inner wall of tube body
It is slidingly sealed cooperation.The outer circumferential surface of second ball seat can realize the closing and unlatching to circulation port, simple in structure.
Scheme 3：Selective cementing unit according to scheme 1 or 2, top pressure is assemblied in respectively at the both ends of the spring
On one ball seat and the second ball seat.The direct top pressure of spring is assemblied between the first ball seat and the second ball seat, rationally utilizes the first ball seat,
Reduce the in vivo structure of pipe.
Scheme 4：Selective cementing unit according to scheme 1 or 2, the tube body in the first ball seat and the second ball seat it
Between be equipped with limitation the second ball seat stroke position limiting structure.Position limiting structure limits the stroke of the second ball seat, avoids spring-compressed excessive
And generate damage.
Scheme 5：Selective cementing unit according to scheme 4, the position limiting structure are the limit coaxially arranged with tube body
Position set.Stop collar is simple in structure, is easily installed.
Scheme 6：Selective cementing unit according to scheme 5, the stop collar are abutted close to one end of the first ball seat
On the first ball seat, the intercommunicating pore of communicating pipe in vivo pipeline and pressurizing port is additionally provided on the stop collar.Stop collar is connected to
On first ball seat, the first ball seat is made to bear the pressure of the second ball seat together with stop collar, enhance the bearing capacity of stop collar.
Scheme 7：Selective cementing unit according to scheme 1 or 2 passes through pin between first ball seat and tube body
Connection.The cost of pin is low, and connection is simple and reliable.
Scheme 8：Selective cementing unit according to scheme 1 or 2 is additionally provided with bushing, the cycling on the tube body
Hole is the endoporus of bushing.Bushing can reduce abrasion of the grains of sand in cement to tube body, increase the service life of tube body.
Description of the drawings
Fig. 1 is the structure diagram of the embodiment 1 of the selective cementing unit of the present invention.
It is respectively marked in figure：1. internal thread；2. tube body；3. the second pitching；4. the second ball seat；5. circulation port；6. spring；7. limit
Position set；8. packer；9. pressurizing port；10. the first ball seat；11. the first pitching；12. external screw thread；13. pin；14. bushing.
Specific embodiment
The embodiment 1 of the selective cementing unit of the present invention is as shown in Figure 1, selective cementing unit includes tube body 2, tube body
2 top is equipped with internal thread 1, bottom is equipped with external screw thread 12, internal thread 1 and external screw thread 12 respectively with the internal thread of casing and outer spiral shell
Line is identical, to be connected with casing.
Tube body 2 is set along its axially spaced-apart there are two ball seat, and two ball seats are the first ball seat 10 close to the bottom of tube body 2
With the second ball seat 4 at the top of the tube body, the second ball seat 4 have to make the first pitching 11 of the first ball seat 10 by it is logical
Road.Selective cementing unit further includes the spring 6 for being used to support the second ball seat 4, and in the embodiment, 6 top pressure of spring is assemblied in
Between one ball seat 10 and the second ball seat 4.First ball seat 10 is fixedly connected with tube body 2 by pin 13, and the second ball seat 4 can be along pipe
The axial movement of body 2, in other embodiments, the first ball seat 10 and tube body 2 by rivet interlacement or can also be welded to connect.
Be additionally provided with bushing 14 on tube body 2, the endoporus of bushing 14 be for adding cemented circulation port 5, in this embodiment, 14 edge of bushing
There are four the circumferential direction of tube body 2 is uniformly distributed, in other embodiments, bushing 14 can also be omitted, the radial through-hole on tube body 2 is
Circulation port.Second ball seat 4 has the close stance for closing circulation port 5 during movement and is moved to bottom with ON cycle hole
5 open position, the outer circumferential surface of the second ball seat 4 are slidingly sealed cooperation with the inner wall of tube body 2, and the second ball seat 4 is real by its outer circumferential surface
Now to the open and close of circulation port 5.Tube body 2 is additionally provided with pressurizing port between the open position of the first ball seat 10 and the second ball seat 4
9, the outside of pressurizing port is equipped with packer 8, in this embodiment, there are four the circumferential direction of pressurizing port 9 along tube body 2 is uniformly distributed.
It is additionally provided with to limit the /V knot of 4 stroke of the second ball seat between the first ball seat 10 and the second ball seat 4 in tube body 2
Structure, in this embodiment, position limiting structure are the stop collar 7 coaxially arranged with tube body 2, and stop collar 7 is close to the one of the first ball seat 10
End is connected on the first ball seat 10, and the first ball seat 10 can be made to bear the pressure of the second ball seat 4, enhancing limit together with stop collar 7
The bearing capacity of position set 7；The intercommunicating pore of the pipeline and pressurizing port 9 in connection tube body 2 is additionally provided on stop collar 7, in other implementations
In example, position limiting structure can also be omitted, the stroke of the second ball seat 4 is controlled by control plus cemented pressure.
Tube body 2 when in use, is connected on set by the selective cementing unit of the present invention by internal thread 1 and external screw thread 12
Guan Shang, a pipe nipple as casing, down toward setting position, the first pitching 11 are put into casing, the first pitching 11 falls with casing
On the first ball seat 10 and separate the annular space between casing and the borehole wall, operating personnel suppress from ground into casing, pressure
Packer 8 is set by pressurizing port 9, so as to annular space between closed casing and the borehole wall, continues to put into the into casing
Two pitchings 3, the second pitching 3 fall on the second ball seat 4, and cement is filled into casing, and the second ball seat 4 overcomes under the pressure of cement
The pressure of spring 6 moves down, and so as to open circulation port 5, cement enters the casing and well on 8 top of packer by circulation port 5
Annular space between wall so as to selectively realize well cementing operation to the annular space on 8 top of packer, is treated to the second ball seat
After 4 pressure release, the second ball seat 4 is sprung back under the action of the pressure of spring 6, so as to close circulation port 5, prevents cement from falling
Casing is poured into, is waited after theing cement solidifies, the second pitching 3, the second ball seat 4, the first pitching 11, the first ball seat are polished off by junk mill
10, you can carry out subsequent completion practice.
The present invention selective cementing unit embodiment 2, with embodiment 1 difference lies in：Stop collar in embodiment 1
One end is connected on the first ball seat, and in the present embodiment, stop collar can also be arranged between the first ball seat and the second ball seat, is led to
The structures such as pin or rivet are crossed to be fixed on tube body.
The present invention selective cementing unit embodiment 3, with embodiment 1 difference lies in：In embodiment 1, /V knot
Structure is stop collar, in the present embodiment, position limiting structure or the interior land or the stop block that are arranged on inboard wall of tube body.
The present invention selective cementing unit embodiment 4, with embodiment 1 difference lies in：The one of spring in embodiment 1
Direct top pressure is held to be assemblied on the first ball seat, in the present embodiment, can also separately set bullet between the first ball seat and the second ball seat
Spring abutment, spring top pressure are assemblied between the first ball seat and spring base.
The present invention selective cementing unit embodiment 5, with embodiment 1 difference lies in：Second ball seat in embodiment 1
Outer circumferential surface and the inner wall of tube body be slidingly sealed cooperation, by the open and close in the outer circumferential surface control loop hole of the second ball seat,
In this embodiment, can also be set at the circumference of the second ball seat along the axially extending ring baffle of tube body, ring baffle can
It can also be wholely set with being fixedly connected by pin with the second ball seat with the second ball seat.
Claims (8)
1. a kind of selectivity cementing unit, it is characterised in that：Set along the axially spaced-apart of tube body that there are two balls including tube body, in tube body
Seat, two ball seats are the first ball seat close to its bottom and the second ball seat at the top of tube body, and the second ball seat, which has, to be used for
Make the pitching of the first ball seat by passage, selective cementing unit further includes the spring for being used to support the second ball seat, the first ball
Seat is fixedly connected with tube body, and the second ball seat can be additionally provided on tube body for adding cemented circulation port along the axial movement of tube body,
Second ball seat has the close stance for closing circulation port during movement and is moved to bottom with the open position in ON cycle hole,
The tube body is additionally provided with pressurizing port between the open position of the first ball seat and the second ball seat, and tube body is equipped with envelope in the outside of pressurizing port
Every device.
2. selectivity cementing unit according to claim 1, it is characterised in that：The outer circumferential surface and tube body of second ball seat
Inner wall be slidingly sealed cooperation.
3. selectivity cementing unit according to claim 1 or 2, it is characterised in that：The both ends difference top pressure of the spring
It is assemblied on the first ball seat and the second ball seat.
4. selectivity cementing unit according to claim 1 or 2, it is characterised in that：The tube body is in the first ball seat and
The position limiting structure of the second ball seat stroke of limitation is equipped between two ball seats.
5. selectivity cementing unit according to claim 4, it is characterised in that：The position limiting structure be and the coaxial cloth of tube body
The stop collar put.
6. selectivity cementing unit according to claim 5, it is characterised in that：The stop collar is close to the one of the first ball seat
End is connected on the first ball seat, and the intercommunicating pore of communicating pipe in vivo pipeline and pressurizing port is additionally provided on the stop collar.
7. selectivity cementing unit according to claim 1 or 2, it is characterised in that：Between first ball seat and tube body
It is connected by pin.
8. selectivity cementing unit according to claim 1 or 2, it is characterised in that：Bushing, institute are additionally provided on the tube body
State the endoporus that circulation port is bushing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711279468.9A CN108086941B (en) | 2017-12-06 | 2017-12-06 | Selective well cementing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711279468.9A CN108086941B (en) | 2017-12-06 | 2017-12-06 | Selective well cementing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108086941A true CN108086941A (en) | 2018-05-29 |
| CN108086941B CN108086941B (en) | 2020-03-06 |
Family
ID=62174167
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711279468.9A Active CN108086941B (en) | 2017-12-06 | 2017-12-06 | Selective well cementing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108086941B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111508318A (en) * | 2020-04-27 | 2020-08-07 | 王泽斌 | Counter is got ready to self-defined subregion |
| CN112593894A (en) * | 2020-12-24 | 2021-04-02 | 山西晋城无烟煤矿业集团有限责任公司 | Multi-purpose multi-stage discontinuous well cementation method for preventing pollution of production layer |
| CN113266306A (en) * | 2021-06-25 | 2021-08-17 | 洲际海峡能源科技有限公司 | Automatic opening cement umbrella for well cementation and use method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4872510A (en) * | 1988-09-30 | 1989-10-10 | Baker Hughes Incorporated | Subterranean well casing float tool |
| CN2620081Y (en) * | 2003-05-21 | 2004-06-09 | 刘爱军 | Side through type automatic slurry-irrigation sleeve float coupling |
| CN2687311Y (en) * | 2004-03-09 | 2005-03-23 | 苗在朝 | Drilling cementation water injection mud non-return valve |
| CN2861469Y (en) * | 2005-12-09 | 2007-01-24 | 天津理工大学 | Packer with expansion guiding ring |
| CN201024982Y (en) * | 2007-04-28 | 2008-02-20 | 中国石油天然气股份有限公司 | A concrete extrusion and injection control tool |
| CN201024977Y (en) * | 2007-05-10 | 2008-02-20 | 辽河石油勘探局 | A multi-function concrete injection well fixing device |
| CN204060620U (en) * | 2014-08-06 | 2014-12-31 | 大庆市永晨石油科技有限公司 | Well cementation pitching sliding sleeve |
-
2017
- 2017-12-06 CN CN201711279468.9A patent/CN108086941B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4872510A (en) * | 1988-09-30 | 1989-10-10 | Baker Hughes Incorporated | Subterranean well casing float tool |
| CN2620081Y (en) * | 2003-05-21 | 2004-06-09 | 刘爱军 | Side through type automatic slurry-irrigation sleeve float coupling |
| CN2687311Y (en) * | 2004-03-09 | 2005-03-23 | 苗在朝 | Drilling cementation water injection mud non-return valve |
| CN2861469Y (en) * | 2005-12-09 | 2007-01-24 | 天津理工大学 | Packer with expansion guiding ring |
| CN201024982Y (en) * | 2007-04-28 | 2008-02-20 | 中国石油天然气股份有限公司 | A concrete extrusion and injection control tool |
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| CN204060620U (en) * | 2014-08-06 | 2014-12-31 | 大庆市永晨石油科技有限公司 | Well cementation pitching sliding sleeve |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111508318A (en) * | 2020-04-27 | 2020-08-07 | 王泽斌 | Counter is got ready to self-defined subregion |
| CN112593894A (en) * | 2020-12-24 | 2021-04-02 | 山西晋城无烟煤矿业集团有限责任公司 | Multi-purpose multi-stage discontinuous well cementation method for preventing pollution of production layer |
| CN112593894B (en) * | 2020-12-24 | 2022-06-03 | 山西晋城无烟煤矿业集团有限责任公司 | Multi-purpose multi-stage discontinuous well cementation method for preventing pollution of production layer |
| CN113266306A (en) * | 2021-06-25 | 2021-08-17 | 洲际海峡能源科技有限公司 | Automatic opening cement umbrella for well cementation and use method thereof |
| CN113266306B (en) * | 2021-06-25 | 2022-04-29 | 洲际海峡能源科技有限公司 | Automatic opening cement umbrella for well cementation and use method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108086941B (en) | 2020-03-06 |
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