CN102400659A - Multifunctional cementer - Google Patents
Multifunctional cementer Download PDFInfo
- Publication number
- CN102400659A CN102400659A CN2010102759598A CN201010275959A CN102400659A CN 102400659 A CN102400659 A CN 102400659A CN 2010102759598 A CN2010102759598 A CN 2010102759598A CN 201010275959 A CN201010275959 A CN 201010275959A CN 102400659 A CN102400659 A CN 102400659A
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- Prior art keywords
- piston
- top connection
- cementing
- central tube
- switch valve
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- 239000004568 cement Substances 0.000 abstract description 11
- 238000000034 method Methods 0.000 abstract description 3
- 239000002002 slurry Substances 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000007547 defect Effects 0.000 abstract 1
- 238000002347 injection Methods 0.000 abstract 1
- 239000007924 injection Substances 0.000 abstract 1
- 210000002445 nipple Anatomy 0.000 description 8
- 238000010276 construction Methods 0.000 description 4
- 239000007788 liquid Substances 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 208000034656 Contusions Diseases 0.000 description 2
- 241001074085 Scophthalmus aquosus Species 0.000 description 2
- 239000012467 final product Substances 0.000 description 2
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007812 deficiency Effects 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
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
Images
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- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The invention discloses a multifunctional cementer, aiming to overcome the defect of well cementation quality accidents caused by high probability of loose closing of a cementing circulation passage and backward flow of cement slurry due to need of closing the cement injection circulation passage by inserting a plug and building pressure after completion of cementing operation of the conventional cementer. An upper joint (1), a central pipe (7) and a lower joint (16) of the cementer are sequentially and fixedly connected from top to bottom to form a fixed pipe string (21); a piston assembly (24) is arranged in an inner hole on the upper end part of the fixed pipe string (21); an outer switch valve (22) is arranged between the upper joint (1) and the lower joint (16) on the outer circle of the fixed pipe string (21); the upper end face of the outer switch valve (22) is in circular-arc surface contact with the lower end face of the upper joint (1); and the lower end of the outer switch valve (22) is fixedly connected with the lower joint (16). The cementer has the beneficial effects of simple and rational structure, easiness in operation, reduced operation processes, increased working efficiency and safety and reliability in opening and closing of the cementing passage.
Description
Affiliated technical field
The present invention relates to a kind of hook-up for cementing of petroleum drilling engineering completion practice, especially relate to a kind of multi-functional cementing device.
Background technology
Implement to use cementing device in top well cementation, the lower screen completion practice at straight well, directional well, horizontal well, can improve cementing quality, reduce construction risk, guarantee for the completion engineering provides reliable technique.
At present, the stage cementing device that uses in the completion construction need be thrown plug mostly and builds the pressure and close circulation canal, the operation of completion cementing well in tubing string.Build the pressure when closing circulation canal throwing plug, because liquid is incompressible, the liquid between blind plate to the plug seat can't be got rid of, and is prone to cause radially that the cementing circulation canal is not closed completely, and influences cementing quality thereby cement paste is poured in down a chimney.Like disclosed Chinese utility model patent on April 21 " stage cementing device " (publication number CN201439701U) in 2010; The top connection of this stage cementing device, seating nipple, lower contact are fixedly connected sequentially from top to bottom; Piston is installed in the bottom of seating nipple; Closure piston is installed in the top of seating nipple, and the piston upper end is positioned at piston with closure piston lower end overlap joint, the radially cementing hole at seating nipple middle part; Piston, closure piston are connected with seating nipple through the shear pin of radially installing; The plug seat is fixedly mounted in the endoporus of closure piston upper end, and outside piston is up big and down small multidiameter, and the upper surface of the cylindrical of piston, the endoporus of seating nipple and lower contact forms annular space; Seating nipple has the raidal drainage hole to be positioned at the annular space lower end, and the seating nipple lower end is equipped with cone valve.This stage cementing device is rational in infrastructure, and easy operating, but when using this stage cementing device needs to throw plug and builds the pressure and just can close the cementing circulation canal, be prone to take place the cementing circulation canal and be not closed completely, thereby cement paste pours in down a chimney the accident generation that influence cementing quality.
Summary of the invention
After overcoming existing cementing device completion cementing job; Need the throwing plug to build the pressure and close the cementing circulation canal; Be prone to take place the cementing circulation canal and be not closed completely, thereby cement paste pours in down a chimney the deficiency that influences the generation of cementing quality accident, the present invention provides a kind of multi-functional cementing device.This multi-functional cementing device has reduced flow charts such as throwing plug, brill plug, shortens completion period; Be difficult to close the drawback of circulation canal when having solved bruising, effectively improved cementing quality and job execution efficient.
The technical solution adopted for the present invention to solve the technical problems is: the top connection of multi-functional cementing device, central tube, lower contact from top to bottom are fixedly connected sequentially and form the stationary pipes string; The endoporus of stationary pipes string upper end is equipped with piston assembly; Between the top connection of stationary pipes string cylindrical and the lower contact outer switch valve is installed; Outer switch valve upper surface contacts with top connection lower surface arc surface, and outer switch valve lower end is fixedly connected with lower contact.
The endoporus of stationary pipes string is up big and down small shoulder hole; The closure piston of piston assembly, piston are installed in the stationary pipes string from top to bottom successively; Closure piston is axially fixed in the top connection by the shear pin I that radially installs; Piston is axially fixed on the central tube by the shear pin II that radially installs, the radially cementing hole on the piston closing center pipe; The anti-turn screw front end of radially installing in the top connection is positioned at the axial elongated slot lower end of closure piston; Central tube lower end endoporus ladder limits the downward sliding position of piston.The shear strength of shear pin II is less than the shear strength of shear pin I.In the jump ring groove of closure piston upper end excircle jump ring is installed, on the top connection inner hole wall of the axial elongated slot correspondence position of closure piston the jump ring groove is arranged.
Close sliding sleeve, adapter sleeve, the sheath of outer switch valve are from top to bottom installed successively; Close sliding sleeve and be fixedly connected with adapter sleeve, the sheath lower end is fixedly connected with lower contact, and sheath upper end endoporus is inserted in the bottom of adapter sleeve; On the lower surface of adapter sleeve and the central tube cylindrical between the lower contact axle spring is installed.Close in the annular space between sliding sleeve middle part endoporus and the said central tube cylindrical outer piston is installed; Closing of annular space upper end has radial direction through hole on the sliding sleeve, on the central tube of annular space bottom radial direction through hole is arranged.
The arc cam of top connection lower surface inserts outer switch valve upper end and closes in the circular groove of sliding sleeve upper surface.
The invention has the beneficial effects as follows that simple and reasonable, easy operating reduces operation procedure, increases work efficiency, the cementing passage is opened, closed safe is reliable.
Description of drawings
Fig. 1 is the multi-functional cementing device structural representation of the present invention.
Fig. 2 closes cementing hole sketch map after the cementing of the multi-functional cementing device of the present invention automatically.
Fig. 3 throws plug to close cementing hole sketch map after the cementing of the multi-functional cementing device of the present invention.
Among the figure: 1. top connection, 2. plug seat, 3. shear pin I, 4. jump ring, 5. closure piston, 6. anti-turn screw, 7. central tube; 8. sliding sleeve is 9. closed in the cementing hole, 10. piston, 11. outer pistons, 12. shear pin II, 13. adapter sleeves; 14. spring, 15. sheaths, 16. lower contacts, 17. plugs, 18. jump ring grooves, 19. annular spaces; 20. radial direction through hole, 21. stationary pipes strings, 22. outer switch valves, 23. radial direction through hole, 24. piston assemblies, 25. axial elongated slots.
The specific embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is described further.But what those skilled in the art should know is to the invention is not restricted to the listed specific embodiment, as long as spirit according to the invention all should be included in protection scope of the present invention.Before narration application the present invention carried out construction operation, described was the initial confined state of multi-functional cementing device.
Referring to Fig. 1.The top connection 1 of the multi-functional cementing device of the present invention, central tube 7, lower contact 16 from top to bottom are fixedly connected sequentially and form stationary pipes string 21, and the external screw thread at central tube 7 two ends is connected with the internal thread of top connection 1, lower contact 16 respectively; The endoporus of stationary pipes string 21 upper ends is equipped with piston assembly 24; Outer switch valve 22 is installed between the top connection 1 of stationary pipes string 21 cylindricals and the lower contact 16.Outer switch valve 22 upper surfaces contact with top connection 1 lower surface arc surface, and normally the outer switch valve of the arc cam of joint 1 lower surface insertion 22 upper ends are closed in the circular groove of sliding sleeve 9 upper surfaces.Outer switch valve 22 lower ends are fixedly connected with lower contact 16.
The endoporus of stationary pipes string 21 is up big and down small shoulder hole, and has three ladders at least.Piston assembly 24 mainly comprises closure piston 5, piston 10 etc., and closure piston 5, piston 10 are installed in the endoporus of stationary pipes string 21 from top to bottom successively.Closure piston 5 is axially fixed in the top connection 1 by the shear pin I 3 that radially installs, and piston 10 is axially fixed on the central tube 7 by the shear pin II 12 that radially installs; The shear strength of shear pin II 12 is less than the shear strength of shear pin I 3.Being lower than slightly on the central tube 7 of piston 10 upper surfaces has radially cementing hole 8, on the central tube 7 of a little higher than piston 10 lower surfaces radial direction through hole 23 is arranged, and piston 10 radially cementing hole 8 is closed with radial direction through hole 23.Central tube 7 lower end endoporus ladders limit piston 10 downward sliding positions.
There is axial elongated slot 25 at closure piston 5 cylindricals middle part; Anti-turn screw 6 front ends of radially installing in the top connection 1 are positioned at the lower end of axial elongated slot 25, and axially elongated slot 25 limits closure piston 5 and moves axially distance.In the jump ring groove of closure piston 5 upper end excircles jump ring 4 is installed, on top connection 1 inner hole wall of axial elongated slot 25 correspondence positions of closure piston 5 jump ring groove 18 is arranged.
Outer switch valve 22 mainly comprises closes sliding sleeve 9, adapter sleeve 13, sheath 15, spring 14 etc., closes sliding sleeve 9, adapter sleeve 13, sheath 15 and from top to bottom installs successively; Close sliding sleeve 9 and be fixedly connected with adapter sleeve 13, sheath 15 lower ends are fixedly connected with lower contact 16, and insert in the sheath 15 upper end endoporus bottom of adapter sleeve 13.On central tube 7 cylindricals between the lower surface of adapter sleeve 13 and the lower contact 16 axle spring 14 is installed.Close sliding sleeve 9 upper ends and central tube 7 cylindricals are slidingly matched, close the upper surface of sliding sleeve 9 and radially cementing hole 8 equal height on the central tube 7 or lower slightly.
Closing between sliding sleeve 9 middle part endoporus and central tube 7 cylindricals is annular space 19, and outer piston 11 is installed in the annular space 19; The upper end of outer piston 11 with close sliding sleeve 9 endoporus and be slidingly matched, bottom and central tube 7 cylindricals are slidingly matched; Closing of annular space 19 upper ends has radial direction through hole 20 on the sliding sleeve 9, on the central tube 7 of annular space 19 bottoms radial direction through hole 23 is arranged, and outer piston 11 is in the radial direction through hole 20 that will close on the sliding sleeve 9 when upper and closes; Outer piston 11 is in when the next closes the radial direction through hole on the central tube 7 23.
In order to improve the multi-functional cementing device of the present invention after accomplishing cementing job, the reliability that can effectively close the cementing hole is equipped with plug seat 2 in closure piston 5 upper ends.The outer lug boss of plug seat 2 is stuck between top connection 1 inner convex platform and closure piston 5 upper surfaces.
In order to guarantee that the multi-functional cementing device of the present invention has excellent sealing performance, top connection 1 and closure piston 5, central tube 1 and close between the contact surface of sliding sleeve 9, piston 10, outer piston 11 radial direction seal ring is installed.Top connection 1 is equipped with holding screw with central tube 7, sheath 15 with the threaded connection place of lower contact 15, prevents that screw thread from releasing.
Use the multi-functional cementing device of the present invention and implement cementing job,
At first; The multi-functional cementing device of the present invention of assembled is connected on the well cementation pipe string; Usually this well cementation pipe string is fixedly connected sequentially and is formed by guide shoe, screen casing, blind plate, external packer of pipe, multi-functional cementing device, sleeve pipe from bottom to up, and the pipe string of will cementing the well is lowered to pit shaft to design attitude.
Then, build the pressure in the well cementation pipe string tubing string, the tube sealing external packer that expands prevents that cementing slurry from getting into screen casing.
Continue in tubing string, to pressurize, pressure acts on the piston 10 again, and after the shear pin II 12 with fixed piston 10 and central tube 7 cut off, piston 10 moved down on the interior step end face that is sitting in central tube 7 (be piston 10 is in the next); Open in the radial circulation cement hole 8 that piston 10 moves down on rear center's pipe 7; Liquid promotes to close sliding sleeve 9, adapter sleeve 13 moves down, compression spring 14; Top connection 1 lower surface with close sliding sleeve 9 upper surfaces and be separated from the inside and outside perforation of multi-functional cementing device so far.
At this moment, can carry out cementing job until reaching designing requirement.
After cementing job is accomplished, no longer pressurization in well cementation pipe string; Because the outer cement slurry density of well cementation this moment pipe string (is generally 1.85～1.90g/cm
3) (be generally 1.20～1.30g/cm greater than the mud density in the well cementation pipe string
3); Spring 14, outer piston 11 are under the effect of well cementation pipe string inner and outer ring pneumatics difference; Adapter sleeve 13, to close sliding sleeve 9 up, contacts with top connection 1 lower surface convex spherical up to closing sliding sleeve 9 upper surface matrix balls, closes sliding sleeve 9 (referring to Fig. 2) closed in the radially cementing hole 8 on the central tube 5.
At last, after the outer cement paste of pipe string of waiting to cement the well solidifies, bore the blind plate that removes on the well cementation pipe string, get final product completion.Exempt cargo handling operations such as throwing plug, brill plug, solved the problem that is difficult to close circulation canal when throwing bruising.
If because of construction operation needs, can also adopt throwing plug mode to close cementing hole 8.Promptly in the pipe string, drop into plug 17, pumping plug 17 is seated on the plug seat 2, the pipe string inner sealing of will cementing the well; In well cementation pipe string, suppress, after the shear pin I 3 of fixing closure piston 5 and top connection 1 cut off, closure piston 5 was to lower slider, was sitting in up to the lower surface of closure piston 5 on the upper surface of piston 10 (referring to Fig. 3); At this moment, cementing hole 8 is closed by secondary.Simultaneously, the interior jump ring 4 of jump ring groove that is installed in closure piston 5 cylindricals falls in the jump ring groove 18 of top connection 1 endoporus, and closure piston 5 and top connection 1 lock are one.
After the outer cement paste of pipe string of waiting to cement the well solidifies, bore and remove plug 16 and blind plate, get final product completion.
It should be noted that the foregoing description is example and unrestricted the present invention, those skilled in the art can design a lot of alternate embodiments and not break away from the scope of appended claims.
Claims (7)
1. a multi-functional cementing device comprises top connection, closure piston, piston, lower contact, it is characterized in that: top connection (1), central tube (7), lower contact (16) from top to bottom are fixedly connected sequentially and form stationary pipes string (21); The endoporus of stationary pipes string (21) upper end is equipped with piston assembly (24); Between the top connection (1) of stationary pipes string (21) cylindrical and the lower contact (16) outer switch valve (22) is installed; Outer switch valve (22) upper surface contacts with top connection (1) lower surface arc surface, and outer switch valve (22) lower end is fixedly connected with lower contact (16).
2. according to the said multi-functional cementing device of claim 1; It is characterized in that: the endoporus of said stationary pipes string (21) is up big and down small shoulder hole; The closure piston (5) of piston assembly (24), piston (10) from top to bottom are installed in the stationary pipes string (21) successively; Closure piston (5) is axially fixed in the top connection (1) by the shear pin I (3) that radially installs, and piston (10) is axially fixed on the central tube (7) by the shear pin II (12) that radially installs, the radially cementing hole (8) on piston (10) the closing center pipe (7); Anti-turn screw (6) front end of radially installing in the top connection (1) is positioned at axial elongated slot (25) lower end of closure piston (5); Said central tube (7) lower end endoporus ladder limits piston (10) sliding position downwards.
3. according to the said multi-functional cementing device of claim 2, it is characterized in that: the shear strength of said shear pin II (12) is less than the shear strength of shear pin I (3).
4. according to the said multi-functional cementing device of claim 3; It is characterized in that: in the jump ring groove of said closure piston (5) upper end excircle jump ring (4) is installed, on top connection (1) inner hole wall of axial elongated slot (25) correspondence position of closure piston (5) jump ring groove (18) is arranged.
5. according to the said multi-functional cementing device of claim 1, it is characterized in that: close sliding sleeve (9), adapter sleeve (13), the sheath (15) of said outer switch valve (22) are from top to bottom installed successively; Close sliding sleeve (9) and be fixedly connected with adapter sleeve (13), sheath (15) lower end is fixedly connected with lower contact (16), and sheath (15) upper end endoporus is inserted in the bottom of adapter sleeve (13); On central tube (7) cylindrical between the lower surface of adapter sleeve (13) and the lower contact (16) axle spring (14) is installed.
6. according to the said multi-functional cementing device of claim 5, it is characterized in that: in the said annular space (19) of closing between sliding sleeve (9) middle part endoporus and said central tube (7) cylindrical outer piston (11) is installed; Closing of annular space (19) upper end has radial direction through hole (20) on the sliding sleeve (9), on the central tube (7) of annular space (19) bottom radial direction through hole (23) is arranged.
7. require 1～6 arbitrary said multi-functional cementing device according to aforesaid right, it is characterized in that: the arc cam of said top connection (1) lower surface inserts outer switch valve (22) upper end and closes in the circular groove of sliding sleeve (9) upper surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102759598A CN102400659A (en) | 2010-09-07 | 2010-09-07 | Multifunctional cementer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102759598A CN102400659A (en) | 2010-09-07 | 2010-09-07 | Multifunctional cementer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102400659A true CN102400659A (en) | 2012-04-04 |
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ID=45883262
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010102759598A Pending CN102400659A (en) | 2010-09-07 | 2010-09-07 | Multifunctional cementer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102400659A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106285556A (en) * | 2015-05-12 | 2017-01-04 | 中国石油化工股份有限公司 | Cementing plug and cementing method and the segmented fracturing device of applying it |
| CN107227943A (en) * | 2017-07-21 | 2017-10-03 | 中国石油集团西部钻探工程有限公司 | Tieback inserts cementing assembly |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0581533A2 (en) * | 1992-07-31 | 1994-02-02 | Halliburton Company | Stage cementer and inflation packer apparatus |
| WO2007021198A1 (en) * | 2005-08-18 | 2007-02-22 | Peak Well Solutions As | Device for conducting cementing operations and inflow regulation |
| CN201024976Y (en) * | 2007-05-10 | 2008-02-20 | 辽河石油勘探局 | An automatic close hydraulic pressure hierarchical concrete injection well fixing device |
| CN201439701U (en) * | 2009-06-26 | 2010-04-21 | 大港油田集团有限责任公司 | Stage cementing distributor |
| CN201802350U (en) * | 2010-09-07 | 2011-04-20 | 大港油田集团有限责任公司 | Multifunctional cementing device |
-
2010
- 2010-09-07 CN CN2010102759598A patent/CN102400659A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0581533A2 (en) * | 1992-07-31 | 1994-02-02 | Halliburton Company | Stage cementer and inflation packer apparatus |
| WO2007021198A1 (en) * | 2005-08-18 | 2007-02-22 | Peak Well Solutions As | Device for conducting cementing operations and inflow regulation |
| CN201024976Y (en) * | 2007-05-10 | 2008-02-20 | 辽河石油勘探局 | An automatic close hydraulic pressure hierarchical concrete injection well fixing device |
| CN201439701U (en) * | 2009-06-26 | 2010-04-21 | 大港油田集团有限责任公司 | Stage cementing distributor |
| CN201802350U (en) * | 2010-09-07 | 2011-04-20 | 大港油田集团有限责任公司 | Multifunctional cementing device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106285556A (en) * | 2015-05-12 | 2017-01-04 | 中国石油化工股份有限公司 | Cementing plug and cementing method and the segmented fracturing device of applying it |
| CN107227943A (en) * | 2017-07-21 | 2017-10-03 | 中国石油集团西部钻探工程有限公司 | Tieback inserts cementing assembly |
| CN107227943B (en) * | 2017-07-21 | 2023-07-28 | 中国石油天然气集团有限公司 | Tieback insertion cementing assembly |
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Application publication date: 20120404 |