CN101532375B - Method for recycling for failure of stage cementing unit and sealed circulation device - Google Patents
Method for recycling for failure of stage cementing unit and sealed circulation device Download PDFInfo
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- CN101532375B CN101532375B CN 200910020667 CN200910020667A CN101532375B CN 101532375 B CN101532375 B CN 101532375B CN 200910020667 CN200910020667 CN 200910020667 CN 200910020667 A CN200910020667 A CN 200910020667A CN 101532375 B CN101532375 B CN 101532375B
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Abstract
The invention discloses a method for recycling for failure of a stage cementing unit used in petroleum industry and a sealed circulation device. After the stage cementing unit is failed, a new cementing circulating channel is built in a shaft to ensure successful implementation of the whole well completion process, and reduce loss to the minimum after the tool has problems. The method comprises that: the sealed circulation device is used to rebuild a cementing well cementation circulation channel in the shaft when the stage cementing unit is opened in advance or cannot be opened normally, thereby ensuring smooth implementation of the well completion process. The device comprises an underground sealing plug and a well head sealing joint, wherein a drilling column is connected between the underground sealing plug and the well head sealing joint; the underground sealing plug ensures that an open sliding sleeve can be opened or sealed once again to carry out construction of an expansion sealing tube external packer; and the well head sealing joint ensures circulation of slurry, sticking prevention of production casting and prevention of wall collapse.
Description
Technical field
Patent of the present invention relates to the method and apparatus of petroleum oil well completion well cementation stage cementing; Particularly the stage cementing device method for recycling for failure and the sealing EGR; After stage cementing device lost efficacy; In pit shaft, set up new cementing circulation canal, guarantee the successful implementation of whole well-completing process, the loss after instrument is gone wrong is reduced to minimum.
Background technology
Along with the extensive use of domestic water horizontal well, the horizontal well completion technology is universal day by day, has become the important support technology that promotes the oil field stable development.In the process of application level well completion technique exploitation, along with a large amount of uses of stage cementing device in constructing at the scene, some problems unavoidably appear in instrument itself, directly influence the completion construction effect.The main problem that exists has:
1, stage cementing device is opened in being lowered to process in advance, and external packer of pipe does not also set;
2, after stage cementing device is lowered into design attitude, suppress to the stage cementing device operating pressure, stage cementing device can't be opened.
When first kind of situation takes place, owing to external packer of pipe does not set, if directly carry out cementing operation; To form cement sheath and mix the slurry band at screen section, and stop up oil flow channel, the later stage can only be remedied through carrying out perforation at sieve tube segment; Not only cause screen casing to scrap; And the reduction productivity of hydrocarbon, economic loss is huge, finally causes the failure of bore hole sand control completion technology.If trip out casing string, probably because wellbore instability causes tubing string to meet card, so that full well is scrapped.
When second kind of situation takes place, construct after can carrying out opening the well cementation passage behind the perforation, but this scheme has been destroyed the cased well body structure, has stayed hidden danger, has increased the perforation operating expenses, causes cost waste.
Stage cementing device is opened with stage cementing device in advance can't open both of these case; Seriously hindered the smooth implementation of horizontal well screen casing crest water flooding mud well-completing process; Be badly in need of a kind of simple and reliable instrument of development in the site operation; After stage cementing device loses efficacy, remedied construction, to guarantee the successful implementation of whole well-completing process, the loss after instrument is gone wrong drops to bottom line.
Summary of the invention
The purpose of this invention is to provide stage cementing device method for recycling for failure and sealing EGR; When stage cementing device occurs opening situation about perhaps can not normally open in advance; In pit shaft, set up new cementing circulation well cementation passage, effectively reduce the economic loss that the stage cementing device fault causes.
Use the present technique solution can reach above-mentioned purpose:
The stage cementing device method for recycling for failure when stage cementing device is opened in advance or can not normally be opened, uses the sealing EGR, in pit shaft, rebulids the cementing well circulation canal:
A: when stage cementing device is opened in advance; Use the down-hole sealing plug insertion in the sealing EGR to open in the sliding sleeve; The sealing blind plate is above, the space of the following production string of stage cementing device; The cementing well circulation canal of the above well section of blind plate is set up in the expand construction of tube sealing external packer;
B: when stage cementing device can not normally be opened; Use the down-hole sealing plug to insert and opens in the sliding sleeve, utilize drill string to apply the pressure of the drill, make and open the circulation port that line displacement under the sliding sleeve is opened stage cementing device; In pit shaft, set up the cementing well circulation canal, guarantee the well-completing process smooth implementation.
The sealing EGR comprises down-hole sealing plug and well head seal nipple, is connected drill string between down-hole sealing plug and the well head seal nipple; The well head seal nipple comprises drill pipe nipple, axle sleeve and casing nipple, and drill pipe nipple is provided with centre bore, and casing nipple is connected with axle sleeve, axle sleeve is installed in the middle part cylindrical of drill pipe nipple.The down-hole sealing plug that is connected in the lowermost end of drill string guarantees to open again to open sliding sleeve or seal opens sliding sleeve, the construction of the tube sealing external packer that expands.The well head seal nipple that is connected in the drill string top guarantees mud circulation, prevents sticking card production string, prevents that the borehole wall from collapsing.
The present invention has following significant effect and advantage:
1, when stage cementing device is opened in advance; Adopt that sealing plug salable blind plate in down-hole is above, stage cementing device open the production string space below the sliding sleeve; After the sealed packer of implementing to expand is constructed; Can normally carry out follow-up cementing operation, stage cementing device opened fault in advance effectively remedy.
2, when the opening sliding sleeve and can not normally open of stage cementing device with hydraulic pressure, adopt the circulation through hole of down-hole sealing plug mechanical type positive opening stage cementing device, it is reliable to guarantee that stage cementing device uses, and sets up normal cementing well circulation canal.
3, in the work progress that makes a trip, can connect the well head seal nipple at well head at any time, the mud in the open-hole annulus is circulated, stopped the complicated of down-hole accident.
4, this sealing EGR simplicity of design is used reliably, has simplified construction technology, has shortened construction period, has guaranteed the normal enforcement of follow-up well-completing process.The economic loss that causes the stage cementing device fault is reduced to minimum, effectively reduces cost of production.
Description of drawings
Fig. 1 is the structural representation of down-hole sealing plug among the present invention.
Fig. 2 is the structural representation of well head seal nipple among the present invention.
Fig. 3 is the use principle sketch map of down-hole sealing plug among the present invention.
The specific embodiment
Below in conjunction with embodiment the present invention is done further detailed description: referring to Fig. 3; The stage cementing device method for recycling for failure; When stage cementing device is opened in advance or can not normally be opened, use the sealing EGR, in pit shaft, rebulid the cementing well circulation canal.When stage cementing device is opened in advance, use the down-hole sealing plug insertion in the sealing EGR to open in the sliding sleeve 12, seal.Circulation port 11 is opened with upper drill production string annular isolation; The space of sealing blind plate more than 14, the following production string 9 of stage cementing device; Well head connection well head seal nipple; The construction of the bloated tube sealing external packer 13 of row is compressed in the cementing truck forehand, sets up the cementing well circulation canal of blind plate 14 above well sections.When stage cementing device can not rely on hydraulic pressure normally to open; Using the down-hole sealing plug to insert opens in the sliding sleeve 12; Utilize drill string to apply the pressure of the drill, make and open the circulation port 11 that 12 times line displacements of sliding sleeve are opened stage cementing device, in pit shaft, set up the cementing well circulation canal.Well head seal nipple in the sealing EGR is placed well head, be connected with production string 9 at any time, realize the mud circulation between production string 9 and the sealing EGR.The below of blind plate 14 is screen casing 15 and flushing valve 16, and the bottommost of pit shaft is at the bottom of the open hole well 17.
Referring to Fig. 1 and Fig. 2; The sealing EGR comprises down-hole sealing plug and well head seal nipple; Be connected drill string between down-hole sealing plug and the well head seal nipple, the down-hole sealing plug is connected in the lowermost end of drill string, and the well head seal nipple is connected in the top of drill string; By drill string the down-hole sealing plug is connected with the well head seal nipple, has formed the hydraulic channel of bloated tube sealing external packer 13.The down-hole sealing plug comprises header body 1 and seal 2, and header body 1 is provided with centre bore, and its cylindrical is provided with step, and step below cylindrical is installed seal 2.The step of header body 1 cylindrical cooperates with the upper surface of opening sliding sleeve 12 interior circles, the below cylindrical of its step and interior round cooperation of opening sliding sleeve 12.The top external diameter of header body 1 step is slightly larger than the internal diameter of opening sliding sleeve 12, is slightly less than the internal diameter of closing obturating plug 10 again.The well head seal nipple comprises drill pipe nipple 3, axle sleeve 5 and casing nipple 7, and drill pipe nipple 3 is provided with centre bore, and casing nipple 7 is connected with axle sleeve 5, is installed in the middle part cylindrical of drill pipe nipple 3.Seal 6 is installed between drill pipe nipple 3 and the axle sleeve 5, is prevented the leakage of mud, casing nipple 7 and production string 9 screwed connections.Assistor 4 also is housed on axle sleeve 5; Assistor 4 can be boosting-rod or afterburning handwheel; Even can not be directly installed on the axle sleeve 5, temporarily with iron staff etc. insert in the jack of axle sleeve 5 also can, mainly be being connected of well head seal nipple and production string 9 for ease.
When stage cementing device was opened in advance, concrete construction sequence was following:
1, be lowered to sealing EGR of the present invention before, the mud in the open-hole annulus 8 that fully circulates keeps well unobstructed.
2, be lowered to the sealing EGR, this sealing EGR pressed following connection from bottom to top: down-hole sealing plug+drill string+well head seal nipple.Be lowered in the process according to the engineering time, collapse with the borehole wall for preventing sticking card production string 9, can be at any time the well head seal nipple on drill string top be connected with production string 9, realize the sealing between this sealing EGR and the production string 9, circulating mud prevents.
3, visit the end: slowly transfer last root drilling rod, test adds the pressure of the drill and visits the end, and it is errorless to check real depth sounding degree.
4, suppress with the little discharge capacity of cementing truck, expansion tube external packer 13 normally uses stage cementing device.
5, trip out the sealing EGR: trip out in the process of this device,, collapse with the borehole wall, well head seal nipple circulating mud can be connected at any time on the drill string top, again the well head seal nipple is pulled down at last for preventing sticking card production string 9 according to the engineering time.
6, the big discharge capacity circulating mud of stock pump that grafts clay carries out well cementing operation after the adjustment mud property.
When stage cementing device can not normally be opened; The step of header body 1 cylindrical directly is positioned to open on the sliding sleeve 12; Utilize drill string to apply certain the pressure of the drill and cut off the shop bolt of opening on the sliding sleeve 12; Thereby make and open 12 times line displacements of sliding sleeve and open stage cementing device circulation port 11, trip out this sealing EGR, carry out normal cementing operation.In the process of down-hole sealing plug that plays this sealing EGR and drill string; Connect the well head seal nipple at well head; Can realize the sealing between drill string and production string 9 annular spaces, in the process that makes a trip, at any time open-hole annulus 8 carried out mud circulation, avoid in removing the process of drill string, taking place the accident of open-hole annulus 8 cave-ins and the sticking card of sleeve pipe; And then the well head seal nipple pulled down, continue to trip out whole tubing strings.Concrete construction sequence is following:
1, be lowered to the sealing EGR, this device is from bottom to top by following connection: down-hole sealing plug+drill string is to well head.
2, visit the end: slowly transfer last root drilling rod, test adds the pressure of the drill and visits the end, and it is errorless to check real depth sounding degree.
3, open stage cementing device: utilize drill string to apply the pressure of the drill, cut off the shop bolt of opening on the sliding sleeve 12 and make it descending, set up the cementing well circulation canal with circulation port 11.
4, carry a drilling rod on, connect the well head seal nipple on the drill string top, tubular column structure is: down-hole sealing plug+drill string+well head seal nipple.Thoroughly mud in the circulation well prevents that sticking card production string 9 from collapsing with the borehole wall.
5, trip out the sealing EGR, trip-out process is according to the engineering time, collapses with the borehole wall for preventing sticking card production string 9, can connect the well head seal nipple at well head at any time, circulating mud, and then the well head seal nipple pulled down, continue to trip out whole tubing strings.
6, the big discharge capacity circulating mud of stock pump that grafts clay carries out well cementing operation after the adjustment mud property.
According to above-mentioned construction, utilize the sealing EGR, accomplish remedial measure to the inefficacy stage cementing device, guarantee that stage cementing device normally uses, accomplish follow-up construction.
Claims (7)
1. the stage cementing device method for recycling for failure when stage cementing device is opened in advance or can not normally be opened, uses the sealing EGR, in pit shaft, rebulids the cementing well circulation canal:
A. when stage cementing device is opened in advance; Use the down-hole sealing plug insertion in the sealing EGR to open in the sliding sleeve (12); Sealing blind plate (14) is above, the space of the following production string of stage cementing device (9); The cementing well circulation canal of the above well section of blind plate (14) is set up in the expand construction of tube sealing external packer (13);
B. when stage cementing device can not normally be opened; Using the down-hole sealing plug to insert opens in the sliding sleeve (12); Utilize drill string to apply the pressure of the drill, make and open the circulation port (11) that line displacement under the sliding sleeve (12) is opened stage cementing device, in pit shaft, set up the cementing well circulation canal.
2. stage cementing device method for recycling for failure according to claim 1; The well head seal nipple that it is characterized in that sealing in the EGR places well head; At any time be connected with production string (9), realize the mud circulation between production string (9) and the sealing EGR.
3. the sealing EGR of special-purpose claim 1 is characterized in that this device comprises down-hole sealing plug and well head seal nipple, is connected drill string between down-hole sealing plug and the well head seal nipple; The well head seal nipple comprises drill pipe nipple (3), axle sleeve (5) and casing nipple (7), and drill pipe nipple (3) is provided with centre bore, and casing nipple (7) is connected with axle sleeve (5), axle sleeve (5) is installed in the middle part cylindrical of drill pipe nipple (3).
4. sealing EGR according to claim 3 is characterized in that the down-hole sealing plug is connected in the lowermost end of drill string, and the well head seal nipple is connected in the top of drill string.
5. according to claim 3 or 4 described sealing EGRs, it is characterized in that the down-hole sealing plug comprises header body (1) and seal (2), header body (1) is provided with centre bore, and its cylindrical is provided with step, and step below cylindrical is installed seal (2).
6. sealing EGR according to claim 5 is characterized in that the step of header body (1) cylindrical cooperates with the upper surface of opening the interior circle of sliding sleeve (12), the below cylindrical of its step and interior round cooperation of opening sliding sleeve (12).
7. sealing EGR according to claim 3 is characterized in that between drill pipe nipple (3) and the axle sleeve (5) seal (6) being installed, and casing nipple (7) and production string (9) screwed connection also are equipped with assistor (4) on axle sleeve (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910020667 CN101532375B (en) | 2009-04-13 | 2009-04-13 | Method for recycling for failure of stage cementing unit and sealed circulation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910020667 CN101532375B (en) | 2009-04-13 | 2009-04-13 | Method for recycling for failure of stage cementing unit and sealed circulation device |
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| Publication Number | Publication Date |
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| CN101532375A CN101532375A (en) | 2009-09-16 |
| CN101532375B true CN101532375B (en) | 2012-07-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 200910020667 Expired - Fee Related CN101532375B (en) | 2009-04-13 | 2009-04-13 | Method for recycling for failure of stage cementing unit and sealed circulation device |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101718189B (en) * | 2009-12-08 | 2012-10-24 | 安东石油技术（集团）有限公司 | Completed well body structure with temporary plugging function screen pipe and well completion method for injecting cement on top |
| CN109306855A (en) * | 2018-09-18 | 2019-02-05 | 中国石油集团西部钻探工程有限公司 | The completion method for tail of two stage cementing at the top of screen casing |
| CN113803019B (en) * | 2020-06-15 | 2023-04-25 | 中国石油化工股份有限公司 | Well completion method and string for horizontal well |
| CN111827922B (en) * | 2020-07-17 | 2022-11-18 | 江苏赛维斯石油科技有限公司 | Drilling-free stage cementing device |
| CN114075944B (en) * | 2020-08-14 | 2024-03-08 | 中国石油化工股份有限公司 | Device and method for closing circulation hole of stage cementing device |
| CN112855069B (en) * | 2021-01-22 | 2022-06-03 | 德州众凯石油科技有限公司 | Graded cementing device |
| CN116446811B (en) * | 2023-06-15 | 2023-10-24 | 威飞海洋装备制造有限公司 | Underwater wellhead annular sealing assembly running-in device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4883125A (en) * | 1987-12-11 | 1989-11-28 | Atlantic Richfield Company | Cementing oil and gas wells using converted drilling fluid |
| CN2182876Y (en) * | 1994-04-05 | 1994-11-16 | 新疆石油管理局钻井公司 | Conjunction head for two stage cementing |
| CN2228973Y (en) * | 1995-05-27 | 1996-06-12 | 吐哈石油勘探开发会战指挥部钻井工艺研究所 | Wellhead sealed inside pipe cementing tool |
| CN2921266Y (en) * | 2006-04-12 | 2007-07-11 | 中国石化集团胜利石油管理局钻井工艺研究院 | Grouting tool for well completion |
| CN201381824Y (en) * | 2009-04-13 | 2010-01-13 | 中国石油化工股份有限公司胜利油田分公司采油工艺研究院 | Sealed circulation device for stage-cementing device invalidation |
-
2009
- 2009-04-13 CN CN 200910020667 patent/CN101532375B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4883125A (en) * | 1987-12-11 | 1989-11-28 | Atlantic Richfield Company | Cementing oil and gas wells using converted drilling fluid |
| CN2182876Y (en) * | 1994-04-05 | 1994-11-16 | 新疆石油管理局钻井公司 | Conjunction head for two stage cementing |
| CN2228973Y (en) * | 1995-05-27 | 1996-06-12 | 吐哈石油勘探开发会战指挥部钻井工艺研究所 | Wellhead sealed inside pipe cementing tool |
| CN2921266Y (en) * | 2006-04-12 | 2007-07-11 | 中国石化集团胜利石油管理局钻井工艺研究院 | Grouting tool for well completion |
| CN201381824Y (en) * | 2009-04-13 | 2010-01-13 | 中国石油化工股份有限公司胜利油田分公司采油工艺研究院 | Sealed circulation device for stage-cementing device invalidation |
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| CN101532375A (en) | 2009-09-16 |
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Granted publication date: 20120711 Termination date: 20210413 |