CN203531847U - High-pressure bypass safety valve for downhole testing - Google Patents
High-pressure bypass safety valve for downhole testing Download PDFInfo
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- CN203531847U CN203531847U CN201320663698.6U CN201320663698U CN203531847U CN 203531847 U CN203531847 U CN 203531847U CN 201320663698 U CN201320663698 U CN 201320663698U CN 203531847 U CN203531847 U CN 203531847U
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- bypass
- holes
- splined mandrel
- high pressure
- urceolus
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Abstract
The utility model discloses a high-pressure bypass safety valve for downhole testing, wherein the high-pressure bypass safety valve is used in formation testing projects of high temperature and high pressure exploratory wells and development wells. A safe disengaging mechanism of the safety valve is connected with a high-pressure bypass mechanism and installed at the upper portion of a splined mandrel with a hole, the high-pressure bypass mechanism is installed at the lower portion of the splined mandrel with the hole, a straight key and a lug of the outer circle of the upper portion of the splined mandrel with the hole are matched with a spline outer cylinder of the safe disengaging mechanism to achieve the disengaging function, a bypass outer cylinder of the high-pressure bypass mechanism is provided with a bypass hole, and the bypass hole is matched with a bypass hole in the lower portion of the splined mandrel with the hole to achieve the bypass function. The high-pressure bypass safety valve for downhole testing solves the problems that in the testing on high temperature and high pressure wells, pressure relief and leakage of bypasses holes occur easily and control difficulty of a reverse buckle of a blocked pipe column is high, reduces shut-in of wells for pressure relief or reworking caused by leakage of the bypass holes in the formation testing process, improves testing success rate, lowers construction cost and is good in use effect.
Description
Technical field
The utility model belongs to the formation testing parts of the exploration and development well of petroleum industry, downhole testing high pressure full by-pass relief valve particularly, in the formation testing engineering of HTHP prospect pit and development well, use, in minimizing formation testing process, closing well pressure release or bypass thorn leak doing over again of causing, improve test success rate, reduce construction cost.
Background technology
Formation testing is in petroleum industry, to find in time and effective ways and the important means of accurate evaluation exploration and development well oil-gas Layer, the bypass that existing conventional formation tester is equipped with is to design by the thinking of bearing forward pressure reduction, by the rubber seal and the seal nipple that are enclosed within on support axle, formed, the interior realization of sealing surface that sealing ring during compression on support axle enters seal nipple seals, and sealing ring during stretching on support axle and seal nipple are separated and realize bypass.The less than one of this bypass is the outer unshielded easy damage of the rubber seal on support axle; The 2nd, the ability that has a pressure reduction face making progress and bear reverse differential pressure is low, in the formation testing process for hp-ht well, when shut in to build up pressure is during higher than annular space head of liquid, bypass easily opens pressure release or sealing ring thorn leaks, cause test data defective and do over again, extend construction period, increased operating expenses.If there is test string, blocked, the difficulty that back-off is controlled in the safety joint being equipped with is larger, and stuck pipe post usually can not be opened from desired position, has increased the workload of follow-up.
Summary of the invention
The purpose of this utility model is to provide downhole testing high pressure full by-pass relief valve for conventional formation tester, solve that existing conventional formation tester bypass pressure release thorn in hp-ht well test leaks and the problem that back-off difficulty is large is controlled in safety joint, in minimizing formation testing process, closing well pressure release or bypass thorn leak doing over again of causing, improve test success rate, reduce operating expenses.
Technical solution of the present utility model is: the safe arming mechanism of downhole testing high pressure full by-pass relief valve is connected with high pressure bypass mechanism, and safe arming mechanism is arranged on the top of splined mandrel with holes, the bottom that high pressure bypass mechanism is arranged on splined mandrel with holes; The straight key of splined mandrel with holes top cylindrical and lug coordinate with the spline urceolus of safe arming mechanism to realize frees function, and the bypass urceolus of high pressure bypass mechanism is provided with by-pass prot and coordinates and realize bypass function with the by-pass prot of splined mandrel with holes bottom.
Compared with prior art, the utlity model has following advantage and good result of use: the utility model combines high pressure bypass mechanism and safe arming mechanism together, replaced safety joint and bypass valve in conventional formation tester, simple in structure, easy to maintenance, use cost is low.High pressure bypass mechanism of the present utility model and safe arming mechanism share a splined mandrel with holes, and latus rectum is large, inner without pressure reduction face, no matter shut in to build up pressure how, all can not produce the upper top power that causes by-pass prot to open; No matter two groups of seals of high pressure bypass mechanism are opened or are closed in by-pass prot, and O RunddichtringO, all the time in protection state, is difficult for sustaining damage; High pressure bypass mechanism adopts two groups of seals, forms Radial Combinations sealing and fit clearance little, and bearing capacity is high, and operating pressure is 105MPa, and operating temperature is 200 ℃, can meet the test needs of current all hp-ht wells.Safe arming mechanism of the present utility model adopts the ways of relief of " dextrorotation+endwisely slipping ", and the free travel that endwisely slips is large, and while freeing operation, free point is obvious, is convenient to control, and combines can guarantee that stuck pipe post opens from desired position with dextrorotation tubing string back-off.The utility model has solved in hp-ht well test that the easy pressure release thorn of by-pass prot leaks and stuck pipe post back-off is controlled the problem that difficulty is large, improved the accuracy of test technology success rate and test data, reduce test and done over again, reduced operating expenses, there is good result of use and economic benefit.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
The specific embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail.Referring to Fig. 1, the safe arming mechanism of downhole testing high pressure full by-pass relief valve is connected with high pressure bypass mechanism, and safe arming mechanism is arranged on the top of splined mandrel 2 with holes, the bottom that high pressure bypass mechanism is arranged on splined mandrel 2 with holes; The straight key of splined mandrel 2 top cylindricals with holes and lug coordinate with the spline urceolus 6 of safe arming mechanism to realize frees function, and the bypass urceolus 3 of high pressure bypass mechanism is provided with by-pass prot and coordinates with the by-pass prot of splined mandrel with holes 2 bottoms
realexisting bypass function.The body top of splined mandrel 2 with holes is provided with straight key, a middle part and is provided with the upwards corresponding lug arranging of the identical and footpath of two axial upper-lower positions, straight key and
oneindividual lug is the top cylindrical that is arranged in splined mandrel 2 with holes in alignment from low to high; The bottom of splined mandrel 2 with holes is at least provided with three by-pass prots, is evenly distributed on the body of bottom.Safe arming mechanism comprises spline urceolus 6 and frees stop nut 5, and the inner circle of freeing stop nut 5 is provided with that straight key keyway coordinates with the straight key of splined mandrel 2 with holes, cylindrical is provided with left hand thread; The top inner circle of spline urceolus 6 is provided with left hand thread and frees that stop nut 5 connects, two lugs of the corresponding splined mandrel 2 with holes of middle part inner circle arrange two groups of straight keys and coordinate with lug.High pressure bypass mechanism comprises bypass urceolus 3 and bypass seal nipple 4, and bypass urceolus 3 is set on the body of lug below of splined mandrel 2 with holes, and bypass seal nipple 4 is threaded, is inserted on the bottom body of splined mandrel 2 with holes with bypass urceolus 3.The bottom internal diameter of bypass urceolus 3 is greater than top internal diameter, top cylindrical is provided with screw thread and is connected with spline urceolus 6, on bypass urceolus 3 bottom cylindrical shells, is provided with by-pass prot, and the inner circle of by-pass prot below is provided with screw thread and is connected with bypass seal nipple 4.The top inner circle of bypass seal nipple 4 is provided with two groups of seals, is respectively supporting ring 7 and O RunddichtringO 9, and the by-pass prot of splined mandrel 2 with holes is formed to sealing.The bottom body of splined mandrel 2 with holes is provided with by-pass prot, can be communicated with the by-pass prot on bypass urceolus 3.When splined mandrel 2 with holes is in down stroke, its by-pass prot is positioned at the below of 4 liang of group seals of bypass seal nipple in sealing state; When splined mandrel 2 with holes is in up stroke, its by-pass prot is positioned at the top of two groups of seals and aligns with the by-pass prot on bypass urceolus 3, inside and outside connection realizes bypass function.The top cylindrical of splined mandrel 2 with holes is threaded with top connection 1 and sealing ring 8 is housed.
While carrying out hp-ht well formation testing, other parts of this high pressure full by-pass relief valve and formation tester are linked together and gone into the well, under the tubing string weight effect of its underpart
, this high pressure full by-pass relief valve is in extended state, and the by-pass prot of splined mandrel with holes 2 bottoms goes upward to the top of two groups of seals that supporting ring 7 forms with O RunddichtringO 9 and aligns with the by-pass prot on bypass urceolus 3, inside and outside connection realizes bypass function.
underpacker pressure foot on well casing post is honored as a queen the utility model in compressive state, the by-pass prot of splined mandrel with holes 2 bottoms comes downwards to the belows of two groups of sealings of supporting ring 7 and O RunddichtringO 9 compositions, bypass function is closed and realizes sealing, no matter bypass is opened or is closed, O RunddichtringO 9 is subject to the protection of supporting ring 7 and splined mandrel with holes 2 bottoms all the time, is difficult for sustaining damage.When the tubing string below the utility model is freed by calorie requirement, up and down tubing string is determined the free travel of splined mandrel 2 with holes, to tubing string, apply right-hand torque, by free travel, put on repeatedly and put tubing string and stuck pipe post can be freed open from the utility model, splined mandrel with holes 2 and free stop nut 5 and trip out in well in company with top tubing string, the tubing string that makes to stay in well reduces to minimum quantity, is convenient to follow-up.
Claims (7)
1. downhole testing high pressure full by-pass relief valve, is characterized in that, safe arming mechanism is connected with high pressure bypass mechanism, and safe arming mechanism is arranged on the top of splined mandrel with holes, the bottom that high pressure bypass mechanism is arranged on splined mandrel with holes; The straight key of splined mandrel with holes top cylindrical and lug coordinate with the spline urceolus of safe arming mechanism, and the bypass urceolus of high pressure bypass mechanism is provided with by-pass prot and coordinates with the by-pass prot of splined mandrel with holes bottom.
2. downhole testing high pressure full by-pass relief valve as claimed in claim 1, is characterized in that, the body top of described splined mandrel with holes is provided with straight key, a middle part and is provided with the upwards corresponding lug arranging of the identical and footpath of two axial upper-lower positions, straight key and
oneindividual lug is the top cylindrical that is arranged in splined mandrel with holes in alignment from low to high; The bottom of splined mandrel with holes is at least provided with three by-pass prots, is evenly distributed on the body of bottom.
3. downhole testing high pressure full by-pass relief valve as claimed in claim 2, it is characterized in that, described safe arming mechanism comprises that spline urceolus and free stop nut, the inner circle of freeing stop nut are provided with that straight key keyway coordinates with the straight key of splined mandrel with holes, cylindrical is provided with left hand thread; The top inner circle of spline urceolus is provided with left hand thread and frees that stop nut connects, two lugs of the corresponding splined mandrel with holes of middle part inner circle arrange two groups of straight keys and coordinate with lug.
4. downhole testing high pressure full by-pass relief valve as claimed in claim 2, it is characterized in that, described high pressure bypass mechanism comprises bypass urceolus and bypass seal nipple, bypass urceolus is set on the body of lug below of splined mandrel with holes, and bypass seal nipple is threaded, is inserted on the bottom body of splined mandrel with holes with bypass urceolus.
5. the downhole testing high pressure full by-pass relief valve as described in claim 1 or 4, it is characterized in that, the bottom internal diameter of described bypass urceolus is greater than top internal diameter, top cylindrical is provided with screw thread and is connected with spline urceolus, on the cylindrical shell of bypass urceolus bottom, be provided with by-pass prot, the inner circle of by-pass prot below is provided with screw thread and is connected with bypass seal nipple.
6. downhole testing high pressure full by-pass relief valve as claimed in claim 5, is characterized in that, the top inner circle of described bypass seal nipple is provided with two groups of seals, is respectively supporting ring and O RunddichtringO
.
7. downhole testing high pressure full by-pass relief valve as claimed in claim 1 or 2 or 3 or 4, is characterized in that, the top cylindrical of described splined mandrel with holes is threaded with top connection and sealing ring is housed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320663698.6U CN203531847U (en) | 2013-10-25 | 2013-10-25 | High-pressure bypass safety valve for downhole testing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320663698.6U CN203531847U (en) | 2013-10-25 | 2013-10-25 | High-pressure bypass safety valve for downhole testing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203531847U true CN203531847U (en) | 2014-04-09 |
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ID=50418069
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320663698.6U Expired - Fee Related CN203531847U (en) | 2013-10-25 | 2013-10-25 | High-pressure bypass safety valve for downhole testing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203531847U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104989322A (en) * | 2015-07-17 | 2015-10-21 | 中国石油集团渤海钻探工程有限公司 | Shear pin type bypass valve |
-
2013
- 2013-10-25 CN CN201320663698.6U patent/CN203531847U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104989322A (en) * | 2015-07-17 | 2015-10-21 | 中国石油集团渤海钻探工程有限公司 | Shear pin type bypass valve |
| CN104989322B (en) * | 2015-07-17 | 2018-10-16 | 中国石油集团渤海钻探工程有限公司 | Shearing pin type bypass valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20151126 Address after: 100029 Beijing Chaoyang District Hui Xin a No. twelve layer 6 Patentee after: SINOPEC OILFIELD SERVICE CORPORATION Patentee after: DOWNHOLE OPERATION COMPANY OF SINOPEC SHENGLI PETROLEUM ENGINEERING CO., LTD. Address before: 100728 Beijing, Chaoyangmen, North Street, No. 22, No. Patentee before: China Petrochemical Group Corp. Patentee before: DOWNHOLE OPERATION COMPANY OF SINOPEC SHENGLI PETROLEUM ENGINEERING CO., LTD. |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140409 Termination date: 20151025 |
|
| EXPY | Termination of patent right or utility model |