CN101705823A - Delayed coagulation well cementation method of high-pressure gas underground gas storage wells - Google Patents
Delayed coagulation well cementation method of high-pressure gas underground gas storage wells Download PDFInfo
- Publication number
- CN101705823A CN101705823A CN200910216137A CN200910216137A CN101705823A CN 101705823 A CN101705823 A CN 101705823A CN 200910216137 A CN200910216137 A CN 200910216137A CN 200910216137 A CN200910216137 A CN 200910216137A CN 101705823 A CN101705823 A CN 101705823A
- Authority
- CN
- China
- Prior art keywords
- gas storage
- well
- storage well
- well device
- gas
- 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
Images
Abstract
The invention relates to a delayed coagulation well cementation method of high-pressure gas underground gas storage wells, comprising the following steps of: A. drilling well; B. grouting: grouting retarding cement slurry to the bottom of a well cylinder and an annular space between the outer wall of a drill stem and the wall of the well cylinder through an inner cavity of the drill stem from down to top until the retarding cement slurry overflows the ground; C. installing a storage well device: lifting the drill stem, sinking the gas storage well device to the well cylinder filled with retarding cement slurry to a set position of the well cylinder, and completing filling of the cement slurry; D. and testing pressure: carrying out pressure test on the gas storage well device for 4 hours; lifting the gas storage well device and repeating the operations from step A to step D when pressure test is not qualified; and completing well cementation when the pressure test is qualified. The well cementation method has good well cementation quality, the combination of the gas storage well device and the wall of the well cylinder is firm, and the gas storage well has good sealing performance, high security and strong reliability, thereby the possibility of accidents of air leak, and the like is greatly reduced.
Description
Technical field
The present invention relates to a kind of delayed coagulation well cementation method in the high-pressure gas storage well building course.
Background technology
Natural gas is as the alternative energy source not only environmental protection but also economy of oil, and in China's development rapidly, its purposes is very extensive.The well for storage of high pressure gas that stores compressed natural gas is other caissons relatively, have safely, and plurality of advantages such as risk is low is widely used in places such as CNG (compressed natural gas) Vehicle Fueling Station, city gas peak regulation station; Particularly included in 2002 since the national standard standard, in whole nation development rapidly, at gas station, peak regulation station, well for storage of high pressure gas has replaced gas bomb, gasholder substantially.
Well cementation is as the critical process that influences safety in the gas storage well building course, and the cementing quality quality will directly influence the safety and the reliability of well for storage.Existing well shaft fixing technology has two classes:
One, the outer annular space well cementation of flexible pipe band, its way mainly is: bundle the flexible pipe band earlier on the outer wall of gas storage well device, after the drilling well, the totally enclosed gas storage well device in bottom is sunk in the pit shaft, and then by the flexible pipe band in the outer annular space of the outer wall of well bore wall and gas storage well device, pump into cement paste from bottom to top gradually, overflow ground until cement paste, cement is promptly finished well cementation after doing admittedly rapidly.There is following shortcoming in the outer annular space well cementation of this flexible pipe band:
1, Kun Bang flexible pipe band is retained in undergroundly, and the adhesive bond between flexible pipe band and the cement paste is insecure, influences cementing quality; 2, when pumping into cement paste, the flexible pipe band can expand, heave, this expansion will cause the laterally offset of gas storage well device, and make around the outer annular space of well bore wall of gas storage well device outer wall inhomogeneous, can cause the gas storage well device outer wall and the well bore wall in somewhere to be close under the opposite extreme situations, the final feasible cement paste that imports is inhomogeneous, even some position does not have the injection of cement paste, also cause gas storage well device fixing insecure in pit shaft, cementing quality is poor.3, even more seriously be, in the process that the gas storage well device sinks, the flexible pipe band is easy to well bore wall extension, wearing and tearing take place to wipe, thereby the flexible pipe band is broken and opening, cement paste can break and the opening part outflow from this when slip casting, rather than flow out from the bottom mouth of pipe of flexible pipe band, cause the drilling fluid of the outer annular space at the following position of rent to discharge, thereby can't filling water mud at these positions, make the well cementation fixed mass of gas storage well device poor, bring serious potential safety hazard, even can't use.
Two, utilize drilling rod to realize the direct circulation well cementation, its way mainly is: 1), after the drilling well, trip out drilling rod, the gas storage well device of bottom opening is sunk to pit shaft.2), after pulp and plugging device are installed in the drilling rod bottom, again drilling rod is put into the gas storage well device, by operation, make the pulp of its bottom and the grout outlet of plugging device relative with the opening of gas storage well device to drilling rod.3), the inner chamber by drilling rod hollow and grout outlet thereof are in the annular space of the well bore wall of gas storage well bottom of device and gas storage well device outer wall then, grout injection progressively overflows ground until cement paste from bottom to top.4), fill slurry after, charge into clear water by identical path to gas storage well bottom again the sealing surface of gas storage well bottom opening and the pulp of drilling rod and the block head sealing surface of plugging device cleaned.5), clean finish after, by the operation drilling rod, the block head of the band rubber seal of pulp and plugging device is combined closely in the sealing of gas storage well bottom of device, realize the bottom seal of caisson.6), seal after, cement will solidify immediately, finish well cementation.There is following shortcoming in this drilling rod circulation well cementation mode:
1, the residual cement of the sealing surface of the bottom opening sealing surface of gas storage well device and block head difficulty clean up, influence the airtight quality of gas storage well; Simultaneously rinse water very easily enters the shaft bottom annular space and mixes with cement paste and formed rare mixed slurry, influences cementing quality, and corrodes the gas storage well device.
2, after the slip casting, realize the sealing shutoff by the block head that the operation drilling rod makes plugging device with the opening of gas storage well bottom of device, owing to run of steel deflection inequality, its contraposition is difficult for, it is big to screw operation easier, seal damages easily, and packing torque is uncontrollable and influence airtight quality.
3, the rubber seal on block head is used the back aging easily and make gas storage well occur leaking at gas storage well, and is caused gas storage well to scrap because of repairing in the shaft bottom.
More than two kinds of well cementation modes all can cause the cementing quality of gas storage well device poor, sealing is bad, leak air, and make gas storage well scrap or application life low, use a period of time promptly to occur leaking and gas storage well is scrapped or caused serious security incident.
Summary of the invention
Purpose of the present invention just provides a kind of delayed coagulation well cementation method of well for storage of high pressure gas, the cementing quality of this kind cementing method is good, the gas storage well device is firm with combining of well bore wall, and the good seal performance of gas storage well device, safe, the good reliability of gas storage well greatly reduce the possibility that security incidents such as gas leakage take place.
The present invention realizes its goal of the invention, and the technical scheme that is adopted is: the delayed coagulation well cementation method of well for storage of high pressure gas the steps include:
A, drilling well get out the pit shaft of gas storage well with the drill bit of drilling well drilling bar front end;
B, slip casting link to each other the upper port of drilling rod inner chamber with slush pump, in the annular space of inner chamber between wellbore bottom and drilling-rod external wall and well bore wall by slush pump and drilling rod, progressively inject extended slurry from bottom to top, fill up annular space, overflow ground until extended slurry;
C, storage well Unit Installation trip out drilling rod, the cylindraceous gas storage well device of diameter greater than drilling rod sunk in the pit shaft that is full of extended slurry, and make gas storage well device outer wall and well bore wall annular space around the gap identical or basic identical, when the gas storage well device sinks, gas storage well device extruding extended slurry, make the extended slurry overflow, when the gas storage well bottom of device is sink to the pit shaft desired location, finish the filling of cement paste;
After D, pressure testing sealed the wellhead assembly of gas storage well device, the air inlet port by the gas storage well device charged into clear water in the gas storage well device again, and is pressurized to 37.5MPa by hydraulic test pump, continue 4 hours, carry out pressure testing;
Gas storage well device hydraulic pressure reduces during as pressure testing, illustrates that then the gas storage well device produces crack, crackle, and pressure testing is defective, trips out the gas storage well device, treat that extended slurry solidifies after, repeat the operation in above A-D step;
The gas storage well device remains stable water pressure during as pressure testing, illustrates that then the gas storage well device does not produce crack, crackle, and the intensity pressure testing is qualified, waits for peacefully extended slurry and solidifies, and promptly finishes well cementation.
Compared with prior art, the invention has the beneficial effects as follows:
One, adopts the grouting of drilling rod inner chamber, than adopting the grouting of flexible pipe band, avoided flexible pipe band and cementitious insecure, the cementing quality that reason causes such as to split poor because of wiping hanging breaking for gas storage well device skew and flexible pipe band, the position of gas storage well device just, cement paste in outer annular space is filled closely, and the gas storage well device is firm with combining of well bore wall, and cementing quality is good.
Two, be full of extended slurry by the outer annular space of drilling rod inner chamber between drilling-rod external wall and well bore wall earlier, sink to the gas storage well device of bottom totally-enclosed (rather than bottom opening) again, owing to do not need sealing operation is carried out in the gas storage well shaft bottom, it is simple to operate, and do not need the bottom is not cleaned and can be formed mixed slurry in wellbore bottom yet, further guaranteed cementing quality yet.The more important thing is that because the gas storage well device is totally enclosed, do not need it to be carried out the seal operation of down-hole, the sealing of gas storage well device improves greatly, has fundamentally guaranteed the safety of gas storage well device again.
Three, adopt extended slurry, can make at the gas storage well device and install, extended slurry does not all solidify fully when going forward side by side the horizontal high voltage pressure testing, both guaranteed that the gas storage well device had adequate time to adjust the installation site, avoided also simultaneously that cement solidifies when pressure testing, the gas storage well device makes the problem of cementing quality variation because of the expansion of trace and contraction, further guaranteed the quality of well cementation. and because the high pressure pressure testing does not influence the quality of well cementation, therefore the inventive method is promptly carried out direct high pressure pressure testing after the gas storage well device installs, more can guarantee gas storage well device sealing in normal working conditions, also guarantee the security performance of gas storage well device.
The setting time of above-mentioned retarded cement is greater than the time sum of described B, C, D three steps operation.Like this, can guarantee that cement does not all solidify, and whole cement operations is carried out smoothly in the whole process of the installation of gas storage well device, pressure testing, also avoided simultaneously the gas storage well device when pressure testing, to make the problem of cementing quality variation, guaranteed the quality of well cementation because of the expansion of trace and contraction.
Below in conjunction with accompanying drawing and concrete embodiment, the present invention is further detailed explanation.
Description of drawings
Fig. 1 is pit shaft and the drilling rod sectional structure schematic diagram of the present invention when carrying out slip casting (slip casting is to half position of pit shaft).
Fig. 2 is that the present invention finishes the gas storage well device after the well cementation and the sectional structure schematic diagram of pit shaft.
The specific embodiment
Embodiment
Fig. 1 and Fig. 2 illustrate, and a kind of specific embodiment of the present invention is: the delayed coagulation well cementation method of well for storage of high pressure gas, and its concrete steps are:
A, drilling well get out the pit shaft 2 of gas storage well with the drill bit of drilling well drilling bar 1 front end;
B, slip casting link to each other the upper port of drilling rod 1 inner chamber with slush pump, in the annular space 3 of inner chamber between wellbore bottom 2a and drilling rod 1 outer wall and pit shaft 2 walls by slush pump and drilling rod 1, progressively inject extended slurry 4 from bottom to top, fill up annular space 3, overflow ground 5 until extended slurry 4;
C, storage well Unit Installation trip out drilling rod 1, the cylindraceous gas storage well device 6 of diameter greater than drilling rod sunk in the pit shaft 2 that is full of extended slurry 4, and make gas storage well device 6 outer walls and pit shaft 2 walls annular space 3 ' around the gap identical or basic identical, when gas storage well device 6 sinks, gas storage well device 6 extruding extended slurries 4, make extended slurry 4 overflows, when gas storage well device 6 bottoms are sink to pit shaft 2 desired locations (being wellbore bottom or close wellbore bottom), finish the filling of cement paste 4;
After D, pressure testing sealed the wellhead assembly of gas storage well device 6, the air inlet port by gas storage well device 6 charged into clear water in gas storage well device 6 again, and is pressurized to 37.5MPa by hydraulic test pump, continue 4 hours, carry out pressure testing;
Gas storage well device 6 hydraulic pressure reduce during as pressure testing, illustrate that then gas storage well device 6 produces cracks, crackle, and pressure testing is defective, after tripping out (taking-ups) gas storage well device and treating that extended slurry 4 solidifies, repeat the operation that above A-D goes on foot;
Gas storage well device 6 remains stable water pressure during as pressure testing, illustrates that then gas storage well device 6 does not produce crack, crackle, and the intensity pressure testing is qualified, waits for peacefully extended slurry 4 and solidifies, and promptly finishes well cementation.
The sealing means of the wellhead assembly of gas storage well device 6 is a prior art, is generally the mechanical seal that repeats of flange or engage thread.
The setting time of this routine extended slurry 4 is greater than described B, C, the time sum of D three steps operation. common B, C, the operating time in three steps of D was at 10-20 hour, according to different geological conditionss, well depth is different and different. gas storage well device 6 of the present invention more convenient operation in order to make it sink to pushing extended slurry 4 when sinking, simply, poured into an amount of clear water in the gas storage well device 6 in the past, make gas storage well device 6 add the buoyancy of the weight of water, the operation easier of the hanging device in the time of can reducing gas storage well device 6 like this and sink to greater than 4 pairs of gas storage well devices 6 of extended slurry.
Claims (2)
1. the delayed coagulation well cementation method of well for storage of high pressure gas the steps include:
A, drilling well get out the pit shaft (2) of gas storage well with the drill bit of drilling well drilling bar (1) front end;
B, slip casting link to each other the upper port of drilling rod (1) inner chamber with slush pump, in the annular space (3) of inner chamber between wellbore bottom (2a) and drilling rod (1) outer wall and pit shaft (2) wall by slush pump and drilling rod (1), progressively inject extended slurry (4) from bottom to top, fill up annular space (3), overflow ground (5) until extended slurry (4);
C, storage well Unit Installation trip out drilling rod (1), the cylindraceous gas storage well device (6) of diameter greater than drilling rod sunk in the pit shaft (2) that is full of extended slurry (4), and make gas storage well device (6) outer wall and pit shaft (2) wall annular space (3 ') around the gap identical or basic identical, when gas storage well device (6) sinks, gas storage well device (6) extruding extended slurry (4), make extended slurry (4) overflow, when gas storage well device (6) bottom is sink to pit shaft (2) desired location, finish the filling of cement paste (4);
After D, pressure testing sealed the wellhead assembly of gas storage well device (6), the air inlet port by gas storage well device (6) charged into clear water in gas storage well device (6) again, and is pressurized to 37.5MPa by hydraulic test pump, continue 4 hours, carry out pressure testing;
Gas storage well device (6) hydraulic pressure reduces during as pressure testing, illustrates that then gas storage well device (6) produces crack, crackle, and pressure testing is defective, trips out the gas storage well device, treat that extended slurry (4) solidifies after, repeat the A-D operation in step;
Gas storage well device (6) remains stable water pressure during as pressure testing, illustrates that then gas storage well device (6) does not produce crack, crackle, and the intensity pressure testing is qualified, waits for peacefully extended slurry (4) and solidifies, and promptly finishes well cementation.
2. the delayed coagulation well cementation method of a kind of well for storage of high pressure gas according to claim 1 is characterized in that: the time sum that the setting time of described retarded cement was operated greater than described B, C, three steps of D.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910216137XA CN101705823B (en) | 2009-11-03 | 2009-11-03 | Delayed coagulation well cementation method of high-pressure gas underground gas storage wells |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910216137XA CN101705823B (en) | 2009-11-03 | 2009-11-03 | Delayed coagulation well cementation method of high-pressure gas underground gas storage wells |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101705823A true CN101705823A (en) | 2010-05-12 |
| CN101705823B CN101705823B (en) | 2012-05-23 |
Family
ID=42376072
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910216137XA Expired - Fee Related CN101705823B (en) | 2009-11-03 | 2009-11-03 | Delayed coagulation well cementation method of high-pressure gas underground gas storage wells |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101705823B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102536247A (en) * | 2010-12-30 | 2012-07-04 | 中国华冶科工集团有限公司 | Construction method of still-water cement grout pad |
| CN103255768A (en) * | 2013-05-15 | 2013-08-21 | 河北建设勘察研究院有限公司 | Grouting construction method of engineering well after bottom wall in pipe is sealed |
| CN107288578A (en) * | 2017-08-17 | 2017-10-24 | 李建峰 | One kind only takes hot ground hot hole solid hole plugging device and the method for not fetching water |
| CN107313747A (en) * | 2017-08-17 | 2017-11-03 | 李建峰 | One kind only takes hot ground hot hole pore-fixing device and the method for not fetching water |
| CN109139114A (en) * | 2018-09-25 | 2019-01-04 | 广州码云互联网科技有限公司 | High pressure underground gas well emits monitoring device on sinking |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2637880Y (en) * | 2003-08-01 | 2004-09-01 | 成都市川油科技发展有限公司 | Cathode protection anticorrusion high pressure gas storage well device |
| CN2646544Y (en) * | 2003-09-28 | 2004-10-06 | 成都市川油科技发展有限公司 | Clip connecting double-valve high-pressure gas underground storage well pumping equipment |
| CN101215967B (en) * | 2008-01-21 | 2010-06-02 | 四川川油天然气科技发展有限公司 | High pressure underground gas well shaft fixing method |
-
2009
- 2009-11-03 CN CN200910216137XA patent/CN101705823B/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102536247A (en) * | 2010-12-30 | 2012-07-04 | 中国华冶科工集团有限公司 | Construction method of still-water cement grout pad |
| CN102536247B (en) * | 2010-12-30 | 2014-07-30 | 中国华冶科工集团有限公司 | Construction method of still-water cement grout pad |
| CN103255768A (en) * | 2013-05-15 | 2013-08-21 | 河北建设勘察研究院有限公司 | Grouting construction method of engineering well after bottom wall in pipe is sealed |
| CN107288578A (en) * | 2017-08-17 | 2017-10-24 | 李建峰 | One kind only takes hot ground hot hole solid hole plugging device and the method for not fetching water |
| CN107313747A (en) * | 2017-08-17 | 2017-11-03 | 李建峰 | One kind only takes hot ground hot hole pore-fixing device and the method for not fetching water |
| CN109139114A (en) * | 2018-09-25 | 2019-01-04 | 广州码云互联网科技有限公司 | High pressure underground gas well emits monitoring device on sinking |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101705823B (en) | 2012-05-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110230309B (en) | Karst area bridge karst cave pile foundation construction method | |
| AU2020101047A4 (en) | Method for filling underground cavity in bedrock by grouting and hydraulic filling device | |
| CN107722954B (en) | Plugging agent for fractured leakage of drilling well, plugging slurry and plugging construction method | |
| CN109339736B (en) | Solid-liquid two-phase hole sealing device and process for gas extraction drilling | |
| CN102242633B (en) | Method for replacing tail brush in extra large diameter shield driving under high water pressure condition | |
| CN201172828Y (en) | Well-covering device for dewatering well | |
| CN103334444B (en) | A kind of method for blocking of foundation pit dewatering well pressure release type | |
| CN101705823B (en) | Delayed coagulation well cementation method of high-pressure gas underground gas storage wells | |
| CN109681262B (en) | Method for improving gas drilling extraction concentration in broken coal body | |
| CN107620312A (en) | High hydraulic pressure precipitation well construction and hydrostatic slip casting method for blocking in a kind of Metro station excavation | |
| CN106639971B (en) | A kind of high pressure-bearing method for blocking of perforation holes | |
| CN105350953A (en) | Measuring method for coal seam gas pressure in complicated geological condition | |
| CN110080771B (en) | Method for preventing rock burst by modifying energy release of deep-well high-stress main roadway coal pillar | |
| CN104763436A (en) | Method and device for receiving pipe jacking machine under condition of high water pressure complicated geological conditions | |
| CN102200002A (en) | method and device for sealing upward hole at high pressure by sections | |
| CN107905760A (en) | From anchoring, self-sealing, the integrated apparatus of high pressure water injection pressure break and control method | |
| CN205152995U (en) | Local seepage processing apparatus of underground continuous wall | |
| CN207660586U (en) | From anchoring, the integrated apparatus of self-sealing, high pressure water injection pressure break | |
| CN104948133A (en) | Grouting plugging device suitable for high-pressure mass-flow gushing water and technology thereof | |
| CN102168433A (en) | Grouting repairing method of water stopping curtain | |
| CN105421475A (en) | Air bag type curtain leakage blocking device and method | |
| CN205205845U (en) | Gasbag formula curtain seepage plugging device | |
| CN202927358U (en) | A steel liner repair structure of a large-diameter concrete non-bearing pipeline fissure | |
| CN110410030B (en) | Composite material application repairing pipe column and method | |
| CN101979820A (en) | Process for sealing elevation drill hole water-stopping sleeves |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120523 Termination date: 20161103 |