CN203867463U - Short section for lowering casing pipe without filling drilling fluid for oil drilling - Google Patents
Short section for lowering casing pipe without filling drilling fluid for oil drilling Download PDFInfo
- Publication number
- CN203867463U CN203867463U CN201420104693.4U CN201420104693U CN203867463U CN 203867463 U CN203867463 U CN 203867463U CN 201420104693 U CN201420104693 U CN 201420104693U CN 203867463 U CN203867463 U CN 203867463U
- Authority
- CN
- China
- Prior art keywords
- casing pipe
- drilling fluid
- short section
- pipe
- pipe nipple
- 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.)
- Expired - Fee Related
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Abstract
The utility model relates to a short section for lowering a casing pipe without filling drilling fluid for oil drilling. The short section solves the problems that casing pipe lowering construction needs to be interrupted in the drilling fluid filling procedure during casing pipe lowering, time is wasted, and the casing pipe is more possibly clamped due to fixation of the casing pipe. According to the technical scheme, the short section is mainly composed of a short section body, a closing sliding bushing, a positioning shear pin, a single-flow valve assembly, an upper circulation hole and a lower circulation hole. According to the short section body, the lower portion of a steel tube is sealed and cut into a tip guiding shoe, the single-flow valve assembly is arranged in the middle of the steel tube, the upper circulation hole is formed in the part, above the single-flow valve assembly, of the body, the lower circulation hole is formed in the part, below the single-flow valve assembly, of the body, the upper portion of the body is provided with a bearing base concaved inwards, and the top of the body is provided with a connecting thread. The closing sliding bushing is a T-shaped hollow cylinder steel tube. The short section body is connected with the closing sliding bushing through the positioning shear pin. Thus, pressure outside the casing pipe and pressure in the casing pipe are balanced in the casing pipe lowering process, cement paste can still be prevented from flowing back after well cementation, and successful well cementation is achieved.
Description
Technical field
This is practical relates to a kind of oil drilling and exempts from drilling fluid charge pipe nipple with setting of casing.
Background technology
In oil drilling setting of casing well cementing process, the substructure of general bunch tube is the combination of guide shoe+eddy flow punching sleeve pipe+ball-and-seat+bunch tube.In cased process, due to the effect of ball-and-seat, drilling fluid can not be back in sleeve pipe, and along with being constantly lowered to of sleeve pipe, sleeve pipe inside and outside differential pressure can be increasing.Squeezed bad in order to prevent sleeve pipe, the sleeve pipe that is often lowered to some will be filled drilling fluid one time in sleeve pipe.After complete under sleeve pipe, property of drilling fluid is adjusted in first circulation, and at this moment drilling fluid can be set up forward circulation to casing annulus by ball-and-seat in sleeve pipe.Then prepare cement paste and with drilling fluid, cement paste forward circulation in sleeve pipe replaced to casing annulus, drilling fluid and cement paste are separated with well cementation plug, replace last, well cementation plug is sitting on ball-and-seat, in sleeve pipe, be drilling fluid entirely, casing annulus is cement paste entirely, and cementing operation finishes.Although it is high that the density ratio drilling fluid of cement paste is wanted, due to the effect of ball-and-seat, cement paste can not be back in sleeve pipe.Drilling fluid charge program in setting of casing process need to be interrupted setting of casing process, has not only wasted the time, cutting ferrule more likely occurs because sleeve pipe is static and run affairs former.
Summary of the invention
The object of the utility model instrument is exactly the pressure balance keeping in oil drilling setting of casing process inside and outside sleeve pipe, thereby without drilling fluid charge; And in well cementing process, with after drilling fluid displacing complete cement paste, can reach equally and prevent the object that cement paste refluxes and realize and cement the well successfully, so both saved the time, can prevent that again the cutting ferrule causing because sleeve pipe is static runs affairs former.
Its technical scheme is: mainly by pipe nipple body, close sliding sleeve, position shearing pin, ball-and-seat assembly, cocycle hole, lower circulation port and form, described pipe nipple body is that a steel pipe bottom is shut and cut as tip guiding footwear; There is ball-and-seat assembly at middle part, and circulation time allows drilling fluid forward flow, can prevent that cement paste from returning after well cementation; Above ball-and-seat assembly, on body, have two symmetrical cocycle holes, in setting of casing process, drilling fluid enters inside pipe casing by circulation port and reaches sleeve pipe inside and outside differential pressure balance, in circulating fluid process in order to circulating fluid; Below ball-and-seat assembly, on body, have two same symmetrical lower circulation ports, in circulating fluid process, allow drilling fluid to loop forward circulation by lower circulation port; The cradle inwardly concaving is arranged at pipe nipple body top, in order to support, closes sliding sleeve; Connecting thread is arranged at pipe nipple top; Described close the cylinder steel pipe that sliding sleeve is a T font hollow, middle hydrophthalmia is used for setting up circulation; Close sliding sleeve lower outside and pipe nipple body inner side and coordinate to seal cocycle hole, pipe nipple body with close sliding sleeve and be connected with position shearing pin.
Beneficial effect is: in setting of casing process, kept the pressure balance inside and outside sleeve pipe, thereby without drilling fluid charge; And in well cementing process, with after the complete cement paste of drilling fluid displacing, can reach equally and prevent the object that cement paste refluxes and realize and cementing the well successfully, so both saved the time, can prevent again the cutting ferrule causing because sleeve pipe is static run affairs therefore, have significant Social benefit and economic benefit.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is further illustrated.
Fig. 1 is the structure chart of this pipe nipple.
Fig. 2 is the setting of casing state design sketch of this pipe nipple.
Fig. 3 is the recurrent state design sketch of this pipe nipple.
Fig. 4 is the closed condition design sketch of this pipe nipple.
1. connecting threads in figure, 2. close sliding sleeve, 3. cocycle hole, and 4. ball-and-seat assembly, 5. guiding footwear, 6. position shearing pin, 7. cradle, 8. descends circulation port.
The specific embodiment
1-4 by reference to the accompanying drawings, to this practical being further described: this instrument forms and comprises: pipe nipple body, close sliding sleeve, position shearing pin, ball-and-seat assembly, upper and lower circulation port etc., be connected after pipe nipple assembles with bunch tube bottom.In setting of casing process, sleeve pipe is inside and outside forms a linker because circulation port is connected, and the drilling fluid outside sleeve pipe can flow into inside pipe casing consistent with the outer liquid level of sleeve pipe, thereby has kept the balance of sleeve pipe external and internal pressure.Descended the adjustment property of drilling fluid that can circulate after sleeve pipe.In well cementing process, when drilling fluid displacing cement paste, well cementation plug is replaced to closing on sliding sleeve, pressure continues to raise, and position shearing pin is cut off, and well cementation plug falls together with closing sliding sleeve, cocycle hole is closed, in sleeve pipe, be drilling fluid entirely, casing annulus is cement paste entirely and can not be back in sleeve pipe, and cementing operation finishes.Use after the utility model, in setting of casing process, kept the pressure balance inside and outside sleeve pipe, thereby without drilling fluid charge; And in well cementing process, with after the complete cement paste of drilling fluid displacing, can reach equally and prevent the object that cement paste refluxes and realize and cementing the well successfully, so both saved the time, can prevent again the cutting ferrule causing because sleeve pipe is static run affairs therefore, have significant Social benefit and economic benefit.
Claims (1)
1. an oil drilling is exempted from drilling fluid charge pipe nipple with setting of casing, it is characterized in that: mainly by pipe nipple body, close sliding sleeve, position shearing pin, ball-and-seat assembly, cocycle hole, lower circulation port and form, described pipe nipple body is that a steel pipe bottom is shut and cut as tip guiding footwear; There is ball-and-seat assembly at middle part, and circulation time allows drilling fluid forward flow, can prevent that cement paste from returning after well cementation; Above ball-and-seat assembly, on body, have two symmetrical cocycle holes, in setting of casing process, drilling fluid enters inside pipe casing by circulation port and reaches sleeve pipe inside and outside differential pressure balance, in circulating fluid process in order to circulating fluid; Below ball-and-seat assembly, on body, have two same symmetrical lower circulation ports, in circulating fluid process, allow drilling fluid to loop forward circulation by lower circulation port; The cradle inwardly concaving is arranged at pipe nipple body top, in order to support, closes sliding sleeve; Connecting thread is arranged at pipe nipple top; Described close the cylinder steel pipe that sliding sleeve is a T font hollow, middle hydrophthalmia is used for setting up circulation; Close sliding sleeve lower outside and pipe nipple body inner side and coordinate to seal cocycle hole, pipe nipple body with close sliding sleeve and be connected with position shearing pin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420104693.4U CN203867463U (en) | 2014-03-05 | 2014-03-05 | Short section for lowering casing pipe without filling drilling fluid for oil drilling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420104693.4U CN203867463U (en) | 2014-03-05 | 2014-03-05 | Short section for lowering casing pipe without filling drilling fluid for oil drilling |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203867463U true CN203867463U (en) | 2014-10-08 |
Family
ID=51648433
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420104693.4U Expired - Fee Related CN203867463U (en) | 2014-03-05 | 2014-03-05 | Short section for lowering casing pipe without filling drilling fluid for oil drilling |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203867463U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106320981A (en) * | 2015-07-07 | 2017-01-11 | 北京中煤矿山工程有限公司 | Fixed-point sleeve throwing device |
| CN107605430A (en) * | 2017-09-21 | 2018-01-19 | 中国海洋石油总公司 | Anti-return self balancing device is used in one kind well cementation |
-
2014
- 2014-03-05 CN CN201420104693.4U patent/CN203867463U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106320981A (en) * | 2015-07-07 | 2017-01-11 | 北京中煤矿山工程有限公司 | Fixed-point sleeve throwing device |
| CN106320981B (en) * | 2015-07-07 | 2018-07-27 | 北京中煤矿山工程有限公司 | A kind of casing fixed point gets rid of pipe device |
| CN107605430A (en) * | 2017-09-21 | 2018-01-19 | 中国海洋石油总公司 | Anti-return self balancing device is used in one kind well cementation |
| CN107605430B (en) * | 2017-09-21 | 2019-06-18 | 中国海洋石油集团有限公司 | A kind of well cementation anti-return self balancing device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141008 Termination date: 20150305 |
|
| EXPY | Termination of patent right or utility model |