CN2189200Y - Arrangement for cementing casings into boreholes with combined double sleeves - Google Patents
Arrangement for cementing casings into boreholes with combined double sleeves Download PDFInfo
- Publication number
- CN2189200Y CN2189200Y CN 94202811 CN94202811U CN2189200Y CN 2189200 Y CN2189200 Y CN 2189200Y CN 94202811 CN94202811 CN 94202811 CN 94202811 U CN94202811 U CN 94202811U CN 2189200 Y CN2189200 Y CN 2189200Y
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- cementing
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- sleeve
- spool
- hole
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Abstract
The utility model discloses a device for cementing casings with combined double sleeves, which belongs to the drilling technical field and can be used for the cementing casing construction in the well cementing work. Because of the creepage of the high-pressure stratum, the sand flow extrusion or other reasons, a sleeve of an oil and gas well is easy to deform or destroy by extrusion. The utility model is a cementing device with combined double sleeves and is used for realizing the cementing technology by combined double sleeves in partial well sections; thus, the strength of the sleeve is improved. The utility model is characterized in that an upper cementing valve on the upper part is composed of a sealing sleeve (3) with a cementing hole (4), and a sealing ring (2). A lower cementing valve on the lower part is composed of a valve sleeve (8) with a cement discharging hole (12) and a pressure balancing hole (11), and a valve core (9).
Description
The utility model belongs to the drilling technique field of oil, natural gas and geology.Be applied in the setting of casing cementing practice of well cementing operation.In the salt rock stratum of down-hole, mud stone layer and other have the stratum of the power of squeezing outside the super-pressure, owing to the wriggling on stratum, shake out extruding or other reason, usually can cause the oil gas casing to be squeezed distortion or squeeze and ruin.As this class accident takes place, and gently then influence the water filling of oil gas well, oil producing operation, increase workover cost; Heavy then cause oil well to be scrapped, have a strong impact on crude output, cause the significant wastage of human, financial, and material resources.The utility model is exactly a kind of double combination casing hook-up for cementing that utilizes, realize double combination casing cementing technology, reach the increase casing strength, satisfy the requirement of the collapse resistance of super-pressure stratum casing string, can effectively prevent sleeve pipe by the crowded device of ruining or being out of shape.
At present, the stratum is squeezed at the wellbore construction scene outside high pressure, and the method that solves casing collapse or distortion has two kinds.A kind of is to adopt off-gauge special heavy casing well cementation, increases the collapse resistance of sleeve pipe; Second method is, protective casing down earlier, and protective casing plays production string then by high pressure formation.Two-layer sleeve pipe improves the anti-outer ability of squeezing, and need carry out twice well cementing operation like this.Two kinds of methods all have unsurmountable shortcoming.Adopt special heavy casing, improved the sleeve pipe collapse resistance, shortcoming is the weight that has increased casing string, has increased cased difficulty, causes many difficulties for later underground work, has improved the manufacturing cost of sleeve pipe.Protective casing under adopting earlier, the back is production string down, in high pressure formation well section bilayer sleeve and double-deck cement sheath is arranged, and has good anti-outer crowded effect.Shortcoming is to cement the well at twice, under protective casing must surpass the degree of depth on super-pressure stratum, bring difficulty to drilling well work, casing programme is complicated more; Need increase thousands of meters protective casing during well cementation.Drilling cost and well cementation cost all increase considerably.
The purpose of design double combination casing hook-up for cementing is used during at super-pressure subterranean wells section setting of casing.Improve the sleeve pipe collapse resistance that is positioned at the super-pressure stratum, the crimp of prevention sleeve pipe changes earlier one deck protective casing down, descends one deck production string again, carries out the conventional method of twice well cementing operation.Realize a well cementing operation, finish the well cementation work of bilayer sleeve.Overcome the casing programme complexity of tradition well cementation, the shortcoming that cost is high.
The utility model mainly is made up of valve under valve in the cementing and the cementing.Valve is made up of sealing shroud, joint ring and short sleeve in the cementing, and the cementing hole is arranged on the sealing shroud.Joint ring will seal between short sleeve and the sealing shroud.Screw thread is arranged at the sealing shroud bottom.Valve is made up of valve pocket, spool and central tube under the cementing, and draining mud hole and pressure compensation opening are arranged on the valve pocket.Spool can slide in valve pocket, can open draining mud hole to lower slider.Screw thread is arranged at overcoat top.In the cementing under valve and the cementing valve all be to adopt engage thread to connect with outer layer sleeve.During well cementing operation, valve in the cementing is installed in the top of outer layer sleeve, valve is installed in the bottom of outer layer sleeve under the cementing.
Top at outer layer sleeve increases valve in the cementing, increases valve under the cementing in the bottom of outer layer sleeve, makes to form an independently space between production string and the outer layer sleeve.In when well cementation, the space of hundred meters of this hop counts can be shifted to an earlier date grout injection, then this section centre there is the bilayer sleeve of cement to transfer to halite layer, mud stone layer or other has the stratum that high pressure squeezes power outward.Carry out conventional cementing at last.The sleeve pipe that is in high pressure formation like this is a double combination casing, and anti-extrusion ability has reached the intensity of the bilayer sleeve of well cementation at twice.Use thousands of meters protective casing less, reduced the well cementation cost.
In order to improve the sealing performance of spool, can on the internal diameter of spool and external diameter, increase joint ring.
In order to make spool under situation about not being stressed, recover original position, be provided with spring in the bottom of spool.
Because the distance of the double-deck combination of outer layer sleeve and production string has hundreds of rice long, and is not crooked in order to make production string, can remain on the center of outer layer sleeve, between outer layer sleeve and production string, be provided with centralizer.
Description of drawings: accompanying drawing 1 is after finishing well cementation, the solid schematic diagram on super-pressure stratum, down-hole of double combination casing hook-up for cementing.Valve in the cementing (14) is installed in the top of outer layer sleeve (5).Valve under the cementing (15) is installed in the bottom of outer layer sleeve (5).The length of outer layer sleeve (5) can be according to the decision of down-hole geological condition, and general length is about 200 meters.Accompanying drawing 2 is complete section schematic diagrames of double combination casing hook-up for cementing.The structure of double combination casing hook-up for cementing and the installation site of each parts have been shown.Accompanying drawing 2 is embodiment of the present utility model, is not full content of the present utility model.
Embodiment: with 178,140 double combination casing hook-up for cementings is example, describes.Be 178 millimeters just when adopting outer layer sleeve (5), when production string (6) is 140 millimeters well cementation, employed double combination casing hook-up for cementing.The bottom of sealing shroud (3) and outer layer sleeve (5) adopt thread connection in the valve in the cementing (14).Two cementing holes, the side of sealing shroud (3) (4), the diameter in hole are 50 millimeters.What the sealing between sealing shroud (3) and the short sleeve (1) was adopted is rubber seal ring (2).Overcoat (8) top of valve under the cementing (15) connects with outer layer sleeve (5), also adopts thread connection.There is spool (9) last two the draining mud holes of overcoat (8) (12) overcoats (8) inside.Spool (9) can be gone up at central tube (7) and slide, and spool (9) can be opened draining mud hole (12) to lower slider.Pressure compensation opening (11) is arranged on the overcoat (8), reduce the upper and lower slip resistance of spool (9).When the operation of needs double-layer water injection mud, inject water under high pressure mud from cementing hole (4), enter the annular space between outer layer sleeve (5) and the production string (6).It is descending to promote spool (9), opens draining mud hole (12), and pressure compensation opening (11) exhaust air or liquid reduce the pressure in the valve under the cementing simultaneously.Annular space between outer layer sleeve (5) and production string (6) is full of cement paste, stops cement injection, and annular space pressure reduces, and spool (9) moves up under the promotion of spring (10), closes draining mud hole (12).At last the double combination casing hook-up for cementing is sent into the predetermined degree of depth in down-hole, carried out the conventional cementing operation.When outer layer sleeve (5) and production string (6) were long, in order to guarantee the concentricity of two-layer sleeve pipe, a centralizer (13) can be assembled for ten meters in every interval.
Claims (4)
1, a kind of double combination casing hook-up for cementing, valve (15) is formed under valve in the cementing (14) and the cementing, it is characterized in that: valve in the cementing (14) is by sealing shroud (3), joint ring (2) and short sleeve (1) are formed, cementing hole (4) is arranged on the sealing shroud (3), screw thread is arranged at sealing shroud (3) bottom, valve under the cementing (15) is by valve pocket (8), spool (9) and central tube (7) are formed, draining mud hole (12) and pressure compensation opening (11) are arranged on the valve pocket (8), spool (9) can slide in valve pocket (8), screw thread is arranged at valve pocket (8) top, and valve (15) all is to adopt engage thread to connect with outer layer sleeve (5) under valve in the cementing (14) and the cementing.
2, double combination casing hook-up for cementing as claimed in claim 1 is characterized in that: on the internal diameter of spool (9) and the external diameter joint ring is arranged.
3, double combination casing hook-up for cementing as claimed in claim 1 is characterized in that: ring-type centralizer (13) is arranged in the middle of outer layer sleeve (5) and the production string (6).
4, as claim 1 or 2 or 3 described double combination casing hook-up for cementings, it is characterized in that: spring (10) is arranged at the bottom of spool (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94202811 CN2189200Y (en) | 1994-02-17 | 1994-02-17 | Arrangement for cementing casings into boreholes with combined double sleeves |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94202811 CN2189200Y (en) | 1994-02-17 | 1994-02-17 | Arrangement for cementing casings into boreholes with combined double sleeves |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2189200Y true CN2189200Y (en) | 1995-02-08 |
Family
ID=33822483
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94202811 Expired - Fee Related CN2189200Y (en) | 1994-02-17 | 1994-02-17 | Arrangement for cementing casings into boreholes with combined double sleeves |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2189200Y (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101243239B (en) * | 2005-06-24 | 2013-07-17 | 瓦克I/P公司 | Oil gas well drilling system and method for grouting in the system |
| CN103917739A (en) * | 2011-08-31 | 2014-07-09 | 派瑞根韩德尔股份有限公司 | Wave-inducing device, casing system and method for cementing a casing in a borehole |
| CN106320983A (en) * | 2016-11-08 | 2017-01-11 | 贵州高峰石油机械股份有限公司 | Method and device for running casing in ultra-deep water whiling drilling |
| CN106414893A (en) * | 2014-02-18 | 2017-02-15 | 新钻机公司 | Well head stabilizing device and method |
| CN108005611A (en) * | 2017-11-30 | 2018-05-08 | 中国石油集团渤海钻探工程有限公司 | Pawl shell type stage cementing device |
| CN105804690B (en) * | 2014-12-30 | 2018-08-21 | 新疆中核天山铀业有限公司 | In-situ leaching process drilling inverse water mud device |
| CN110439478A (en) * | 2019-07-18 | 2019-11-12 | 中国石油天然气集团有限公司 | Inner layer sleeve is the pipe in pipe casing being threadedly coupled and its assembly method |
-
1994
- 1994-02-17 CN CN 94202811 patent/CN2189200Y/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101243239B (en) * | 2005-06-24 | 2013-07-17 | 瓦克I/P公司 | Oil gas well drilling system and method for grouting in the system |
| CN103917739A (en) * | 2011-08-31 | 2014-07-09 | 派瑞根韩德尔股份有限公司 | Wave-inducing device, casing system and method for cementing a casing in a borehole |
| CN103917739B (en) * | 2011-08-31 | 2017-10-20 | 派瑞根韩德尔股份有限公司 | Ripple inducing device, cannula system and the method for abutment sleeve in the wellbore |
| CN106414893A (en) * | 2014-02-18 | 2017-02-15 | 新钻机公司 | Well head stabilizing device and method |
| US10151166B2 (en) | 2014-02-18 | 2018-12-11 | Neodrill As | Well head stabilizing device and method |
| CN106414893B (en) * | 2014-02-18 | 2019-11-22 | 新钻机公司 | Well head stabilising arrangement and method |
| CN105804690B (en) * | 2014-12-30 | 2018-08-21 | 新疆中核天山铀业有限公司 | In-situ leaching process drilling inverse water mud device |
| CN106320983A (en) * | 2016-11-08 | 2017-01-11 | 贵州高峰石油机械股份有限公司 | Method and device for running casing in ultra-deep water whiling drilling |
| CN108005611A (en) * | 2017-11-30 | 2018-05-08 | 中国石油集团渤海钻探工程有限公司 | Pawl shell type stage cementing device |
| CN108005611B (en) * | 2017-11-30 | 2020-03-24 | 中国石油集团渤海钻探工程有限公司 | Claw sleeve type stage cementing device |
| CN110439478A (en) * | 2019-07-18 | 2019-11-12 | 中国石油天然气集团有限公司 | Inner layer sleeve is the pipe in pipe casing being threadedly coupled and its assembly method |
| CN110439478B (en) * | 2019-07-18 | 2022-03-29 | 中国石油天然气集团有限公司 | Double-layer combined sleeve structure with inner-layer sleeve in threaded connection and assembling method thereof |
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| C57 | Notification of unclear or unknown address | ||
| DD01 | Delivery of document by public notice |
Addressee: Well Drilling Inst., North China Petroleum Administrative Office Document name: Letter of authorization |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |