CN108868691A - A kind of pressure-controlled multipurpose test valve - Google Patents
A kind of pressure-controlled multipurpose test valve Download PDFInfo
- Publication number
- CN108868691A CN108868691A CN201810610842.7A CN201810610842A CN108868691A CN 108868691 A CN108868691 A CN 108868691A CN 201810610842 A CN201810610842 A CN 201810610842A CN 108868691 A CN108868691 A CN 108868691A
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- 238000012360 testing method Methods 0.000 title claims abstract description 25
- 239000007788 liquid Substances 0.000 claims description 29
- 239000012530 fluid Substances 0.000 claims description 25
- 239000012224 working solution Substances 0.000 claims description 15
- 238000010008 shearing Methods 0.000 claims description 14
- 230000037361 pathway Effects 0.000 claims description 12
- 238000006243 chemical reaction Methods 0.000 claims description 6
- 210000002583 cell-derived microparticle Anatomy 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 abstract description 7
- 238000010276 construction Methods 0.000 abstract 1
- 230000001351 cycling effect Effects 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002775 capsule Substances 0.000 description 1
- 230000005465 channeling Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008450 motivation Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/06—Valve arrangements for boreholes or wells in wells
- E21B34/08—Valve arrangements for boreholes or wells in wells responsive to flow or pressure of the fluid obtained
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Safety Valves (AREA)
Abstract
The invention discloses a kind of pressure-controlled multipurposes to test valve, tool is driven a well by the first order and second level closing well tool is constituted, the drive a well first order top connection of upper tool part of the first order is connected with the second level lower contact of the lower part of second level closing well tool by screw thread, pressure-controlled multipurpose test valve tool is combined into.Pressure-controlled multipurpose test valve is suppressed by annular space, it realizes cycling switch operation, carries out formation testing construction, inside is matched using piston cylinder operator with disconnected pin switch, with pressure release barrel structure, have the characteristics that easy to maintain, at low cost, durability is strong, ground display switch well state.
Description
Technical field
The present invention relates to oil and gas exploration technology field, especially a kind of pressure-controlled multipurpose tests valve, main to use
In hydrocarbon test operation, mode is suppressed using annular circulation, control downhole tool carries out switch well operations, completes test jobs work
Sequence requirement, is formation testing specific purpose tool.
Background technique
Used test switch well tool is mainly tri- kinds of MFE, APR, STV, and MFE test valve is that tubing string lifts from the top and puts down formula behaviour
Make, not applicable for high-pressure well, gas well etc., APR, STV test valve as the operation of annular space pressing type, and internal motivation is mentioned by nitrogen capsule
For, structure is complicated, and maintenance difficulties are big, at high cost, and ground can not the operation of display switch well whether succeed, cause use scope by
Limit.
Summary of the invention
The technical problem to be solved by the invention is to provide a kind of oil and gas well testings to switch well tool, easy to operate, structure
Relatively easy, maintenance is convenient, improves cost performance and use scope.
In order to solve the above-mentioned technical problem, the technical solution adopted by the present invention is that：A kind of pressure-controlled multipurpose test valve, by
Drive a well tool and second level closing well tool of the first order is constituted,
The drive a well structure of tool of the first order is：First order working solution feed pathway is located at first order inlet connector sheet
On body, it is reserved with first order inlet connector annular space through-hole on first order inlet joint body, under first order inlet connector
Portion is connected by screw thread with first order lower contact, and first order inlet connector top passes through sap cavity body connector in screw thread and the first order
It is connected, forms first order fluid inside junction and convert chamber, be fixed with blind plugging, first order pin inside first order inlet connector
Shearing disk, first order piston have first order piston hole on first order piston, and first order piston lower portion is placed in inside blind plugging, blind
Stifled to play sealing first order piston centre channeling, first shear pin one end is fixed on first order pin shearing disk, separately
One end is placed in first order piston cut groove, there is first order pressure release cylinder sliding block, the first order inside first order pressure release cylinder liquid inlet joint
There is first order pressure release cylinder sliding block inner via hole on pressure release cylinder slider body, first order pressure release cylinder liquid inlet joint lower part passes through screw thread and the
Sap cavity body connector is connected in level-one, and top and the outer fluid chamber connector of the first order, first order pressure release cylinder, first order top connection pass through silk
Button is sequentially connected, and first order central tube is placed in the outer fluid chamber connector of the first order, first order pressure release cylinder, in first order top connection, the
Level-one pressure release cylinder sliding block top is connected with first order central tube, and lower part is connected with first order piston；
The structure of the second level closing well tool is：Second level lower contact lower inside is fixed with the shearing of second level pin
Disk has second level piston inside the lower contact of the second level, there is second level piston hole, the second shear pin on the piston only of the second level
One end is fixed on the pin shearing disk of the second level, and the other end is placed in the piston cut groove of the second level, and third level working solution feed liquor is logical
Road is located on second level pressure release cylinder ontology, and it is logical that pressure release cylinder liquid inlet joint annular space in the second level is reserved on second level pressure release cylinder ontology
Hole, second level pressure release cylinder liquid inlet joint lower part are connected by screw thread with second level lower contact, and second level stream is formed inside junction
Body converts chamber, there is pressure release cylinder sliding block in the second level inside second level pressure release cylinder liquid inlet joint, top and second level external shunt connector, the
Second level pressure release cylinder housing, second level top connection are sequentially connected by screw thread, and pressure release cylinder liquid inlet joint ontology in the second level is reserved with
Second level pressure release cylinder sliding block inner via hole is reserved with second level top connection annular space through-hole, pressure release cylinder inner sleeve on second level top connection ontology
Lower part is connected with pressure release cylinder lower sleeve gasket, top with pressure cylinder upper sleeve gasket by screw thread, and second level external shunt connector, second are placed in
Inside the ectosome that grade pressure release cylinder housing, second level top connection are constituted, second level ring wall channel, pressure release cylinder lower sleeve gasket lower part are formed
It is connected with inside second level pressure release cylinder liquid inlet joint by screw thread, pressure release cylinder upper sleeve gasket passes through screw thread phase with second level top connection
Even, by screwed connection, connector upper inside, second level central tube are placed in by second tap on the second level in the second level
The chamber that grade pressure release cylinder liquid inlet joint, pressure release cylinder lower sleeve gasket, pressure release cylinder inner sleeve, pressure cylinder upper sleeve gasket, second level top connection are constituted
Internal portion, second level central tube lower part are connected with second level pressure release cylinder sliding block, and top is connected with tap lower part in the second level；
It is connect under the first order top connection for upper tool part that the first order is driven a well and the second level of the lower part of second level closing well tool
Head is connected by screw thread, is combined into pressure-controlled multipurpose test valve tool.
The beneficial effects of the invention are as follows：Mechanical structure is simple, reliable performance, and easy maintenance, ground can reality switch well works
The test of work switchs well.
Detailed description of the invention
Fig. 1 is that the first order of the present invention pressure-controlled multipurpose test valve drives a well the structural schematic diagram of tool.
Fig. 2 is the structural schematic diagram of the second level closing well tool of the pressure-controlled multipurpose test valve of the present invention.
In figure：1 first order lower contact, 2 first order inlet connectors, sap cavity body connector in 3 first order, the 4th level-one pressure release
Cylinder liquid inlet joint, the outer fluid chamber connector of 5 first order, 6 first order pressure release cylinders, 7 first order top connections, 8 blind pluggings, 9 first order pins
Shearing disk, 10 first order pistons, 11 first order pressure release cylinder sliding blocks, 12 first order central tubes, 13 second level lower contacts, 14 second level
Pressure release cylinder liquid inlet joint, 15 second level external shunt connectors, 16 second level pressure release cylinder housings, 17 pressure release cylinder inner sleeves, on 18 second level
Connector, 19 second level pressure release cylinder lower sleeve gaskets, 20 second level pressure release cylinder upper sleeve gaskets, 21 second level pistons, 22 second level pins
Shearing disk, 23 second level top connection annular space through-holes, 24 second level pressure release cylinder sliding blocks, 25 second level central tubes, in 26 second level point
Flow connector, 27 first shear pins, 28 first order working solution feed pathways, 29 second level working solution feed pathways, 30 first order
Inlet connector annular space through-hole, 31 second level pressure release cylinder liquid inlet joint annular space through-holes, 32 first order piston holes, 33 second level are living
Through-hole is filled in, 34 first order fluids convert chamber, and 35 second level fluids convert chamber, 36 second level ring wall channels, 37 first order pressure release cylinders
Sliding block inner via hole, 38 second level pressure release cylinder sliding block inner via holes, the outer fluid chamber connector inner via hole of 39 first order, 40 third level working solutions
Feed pathway, 47 second shear pins.
Specific embodiment
Invention is further described in detail with reference to the accompanying drawings and detailed description：
As shown in Figure 1, 2, the present invention 1, a kind of pressure-controlled multipurpose test valve, drive a well tool by the first order and the second level is closed
Well tool is constituted,
The drive a well structure of tool of the first order is：First order working solution feed pathway 28 is located at first order inlet connector
On 2 ontologies, first order inlet connector annular space through-hole 30, first order inlet are reserved on 2 ontology of first order inlet connector
2 lower part of connector is connected by screw thread with first order lower contact 1, and 2 top of first order inlet connector passes through in screw thread and the first order
Sap cavity body connector 3 is connected, and forms first order fluid inside junction and converts chamber 34, is fixed with inside first order inlet connector 2
Blind plugging 8, first order pin shearing disk 9, first order piston 10 have first order piston hole 32, the first order on first order piston 10
10 lower part of piston is placed in inside blind plugging 8, and blind plugging 8 is played the role of sealing 10 central passage of first order piston, the first shear pin 27
One end is fixed on 9 on first order pin shearing disk, and the other end is placed in 10 cut groove of first order piston, first order pressure release cylinder 4 into
There is first order pressure release cylinder sliding block 11 inside liquid connector, has in first order pressure release cylinder sliding block on 11 ontology of first order pressure release cylinder sliding block and lead to
Hole 37,4 liquid inlet joint lower part of first order pressure release cylinder are connected by screw thread with sap cavity body connector 3 in the first order, top and the first order
Outer fluid chamber connector 5, first order pressure release cylinder 6, first order top connection 7 are sequentially connected by screw thread, and first order central tube 12 is placed in
The outer fluid chamber connector 5 of the first order, first order pressure release cylinder 6, in first order top connection 7,11 top of first order pressure release cylinder sliding block and the
Primary centre pipe 12 is connected, and lower part is connected with first order piston 10；
The structure of the second level closing well tool is：Lower contact 13 lower inside in the second level is fixed with the shearing of second level pin
Disk 22 has second level piston 21 inside second level lower contact 13, has second level piston hole 33 on 21 ontology of second level piston,
Second shear pin, 47 one end is fixed on second level pin shearing disk 22, and the other end is placed in 21 cut groove of second level piston,
Third level working solution feed pathway 40 is located on 14 ontology of second level pressure release cylinder, and is reserved on 14 ontology of second level pressure release cylinder
Second level pressure release cylinder liquid inlet joint annular space through-hole 31,14 liquid inlet joint lower part of second level pressure release cylinder pass through screw thread and second level lower contact
13 are connected, and form second level fluid inside junction and convert chamber 35, have the second level to let out inside second level pressure release cylinder liquid inlet joint 14
Pressure cylinder sliding block 24, top and second level external shunt connector 15, second level pressure release cylinder housing 16, second level top connection 18 pass through screw thread
It is sequentially connected, 14 ontology of second level pressure release cylinder liquid inlet joint is reserved with second level pressure release cylinder sliding block inner via hole 38, connects on the second level
Be reserved with second level top connection annular space through-hole 23 on first 18 ontology, 17 lower part of pressure release cylinder inner sleeve and pressure release cylinder lower sleeve gasket 19, on
Portion is connected with pressure cylinder upper sleeve gasket 20 by screw thread, and second level external shunt connector 15, second level pressure release cylinder housing 16, second are placed in
Inside the ectosome that grade top connection 18 is constituted, second level ring wall channel 36 is formed, 19 lower part of pressure release cylinder lower sleeve gasket is let out with the second level
14 inside of pressure cylinder liquid inlet joint is connected by screw thread, and pressure release cylinder upper sleeve gasket 20 is connected with second level top connection 18 by screw thread,
Tap 26 is by screwed connection 18 upper inside of connector on the second level in the second level, and second level central tube 25 is placed in by the
Second level pressure release cylinder liquid inlet joint 14, pressure release cylinder inner sleeve 17, pressure cylinder upper sleeve gasket 20, connects on the second level pressure release cylinder lower sleeve gasket 19
First 18 inside cavities constituted, 25 lower part of second level central tube are connected with second level pressure release cylinder sliding block 24, in top and the second level
26 lower part of tap is connected；
It is connect under the first order top connection 7 for upper tool part that the first order is driven a well and the second level of the lower part of second level closing well tool
First 13 are connected by screw thread, are combined into pressure-controlled multipurpose test valve tool.
Pressure-controlled multipurpose test valve tool is connected in Oil testing tubing string.After packer setting, formation fluid warp
By formation fluid via inside first order lower contact 1, first order inlet connector annular space through-hole 30 enter first order fluid convert
Chamber 34 is enclosed in first order fluid conversion chamber 34 by first order piston 10, and formation fluid can not flow into tubing string.Annular space is suppressed,
Working solution enters from first order working solution feed pathway 28, pushes first order piston 10, reaches that the first shear pin 27 is predetermined to be cut
After cutting value, first order piston 10 cuts the first shear pin 27, and first order piston 10 moves upwards, on first order piston hole 32
First order fluid conversion 34 position of chamber is moved to, is linked up with first order fluid conversion chamber 34, formation fluid flows into first order piston 10
Inside, via inside first order pressure release cylinder sliding block 11, inside first order central tube 12, second level piston hole 33, the second level flow
Body conversion chamber 35, second level pressure release cylinder liquid inlet joint annular space through-hole 31, second level ring wall channel 36, second level top connection annular space are logical
Hole 23 to top tubing string realizes the function that drives a well.First order piston 10 pushes first order pressure release cylinder sliding block 11 to move upwards simultaneously, makes
Second level working solution feed pathway 29 is connected to first order pressure release cylinder sliding block inner via hole 37, by outside the first order in fluid chamber connector
Through-hole 39 enters first order pressure release cylinder 6, ground moment pressure release, so that ground shows out that active well is completed.
When carrying out closing well operation, annular space is suppressed, and working solution enters from second level working solution feed pathway 29, by first
Grade pressure release cylinder 6, after pushing second level piston 21, reaching the predetermined shear force of the second shear pin 47, second level piston 21 cuts the
Two shear pins 47, second level piston 21 move upwards, and second level piston hole 33 is by 14 envelope of second level pressure release cylinder liquid inlet joint
It closes, blocks inside formation fluid entering tool, realize closing well function.
Second level piston 21 pushes second level pressure release cylinder sliding block 24 to move upwards simultaneously, makes third level working solution feed pathway
40 are connected to second level pressure release cylinder sliding block inner via hole 38, and into space in pressure release cylinder inner sleeve 17, ground moment pressure release, ground is shown
Active well is closed to complete.
In conclusion the contents of the present invention are not limited in the above embodiments, the knowledgeable people in same area can
Can propose other embodiments easily within technological guidance's thought of the invention, but this embodiment is included in this hair
Within the scope of bright.
Claims (1)
1. a kind of pressure-controlled multipurpose tests valve, which is characterized in that tool is driven a well by the first order and second level closing well tool is constituted,
The drive a well structure of tool of the first order is：First order working solution feed pathway (28) is located at first order inlet connector
(2) on ontology, first order inlet connector annular space through-hole (30), the first order are reserved on first order inlet connector (2) ontology
Inlet connector (2) lower part is connected by screw thread with first order lower contact (1), and first order inlet connector (2) top passes through silk
Button is connected with sap cavity body connector (3) in the first order, and first order fluid conversion chamber (34), first order inlet are formed inside junction
Blind plugging (8), first order pin shearing disk (9), first order piston (10) are fixed with inside connector (2), on first order piston (10)
Have first order piston hole (32), first order piston (10) lower part is placed in blind plugging (8) inside, and the sealing first order is played in blind plugging (8)
The effect of piston (10) central passage, the first shear pin (27) one end are fixed on first order pin shearing disk (9), and the other end is set
In in first order piston (10) cut groove, there is first order pressure release cylinder sliding block (11) inside first order pressure release cylinder (4) liquid inlet joint,
There are first order pressure release cylinder sliding block inner via hole (37), first order pressure release cylinder (4) liquid inlet joint on level-one pressure release cylinder sliding block (11) ontology
Lower part is connected by screw thread with sap cavity body connector (3) in the first order, and top is let out with the outer fluid chamber connector (5) of the first order, the first order
Pressure cylinder (6), first order top connection (7) are sequentially connected by screw thread, and first order central tube (12) is placed in the outer fluid chamber of the first order and connects
Head (5), first order pressure release cylinder (6), in first order top connection (7), first order pressure release cylinder sliding block (11) top and first order center
It manages (12) to be connected, lower part is connected with first order piston (10)；
The structure of the second level closing well tool is：Second level lower contact (13) lower inside is fixed with second level pin shearing disk
(22), have second level piston (21) inside second level lower contact (13), have second level piston logical on second level piston (21) ontology
Hole (33), the second shear pin (47) one end are fixed on second level pin shearing disk (22), and the other end is placed in second level piston
(21) in cut groove, third level working solution feed pathway (40) is located on second level pressure release cylinder (14) ontology, second level pressure release cylinder
(14) second level pressure release cylinder liquid inlet joint annular space through-hole (31), second level pressure release cylinder (14) liquid inlet joint lower part are reserved on ontology
It is connected by screw thread with second level lower contact (13), forms second level fluid conversion chamber (35), second level pressure release inside junction
There is second level pressure release cylinder sliding block (24) inside cylinder liquid inlet joint (14), top is let out with second level external shunt connector (15), the second level
Pressure cylinder housing (16), second level top connection (18) are sequentially connected by screw thread, and second level pressure release cylinder liquid inlet joint (14) ontology is pre-
There are second level pressure release cylinder sliding block inner via hole (38), it is logical that top connection annular space in the second level is reserved on second level top connection (18) ontology
Hole (23), pressure release cylinder inner sleeve (17) lower part and pressure release cylinder lower sleeve gasket (19), top and pressure cylinder upper sleeve gasket (20) pass through screw thread
Be connected, be placed in second level external shunt connector (15), second level pressure release cylinder housing (16), second level top connection (18) constitute ectosome
Inside is formed second level ring wall channel (36), pressure release cylinder lower sleeve gasket (19) lower part and second level pressure release cylinder liquid inlet joint (14)
Inside is connected by screw thread, and pressure release cylinder upper sleeve gasket (20) is connected with second level top connection (18) by screw thread, is divided in the second level
Flowing connector (26), connector (18) upper inside, second level central tube (25) are placed in by the second level on the second level by screwed connection
Pressure release cylinder liquid inlet joint (14), pressure release cylinder lower sleeve gasket (19), pressure release cylinder inner sleeve (17), pressure cylinder upper sleeve gasket (20), the second level
The inside cavity that top connection (18) is constituted, second level central tube (25) lower part are connected with second level pressure release cylinder sliding block (24), top
It is connected with tap in the second level (26) lower part；
The first order is driven a well the second level lower contact of the first order top connection (7) of upper tool part and the lower part of second level closing well tool
(13) it is connected by screw thread, is combined into pressure-controlled multipurpose test valve tool.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810610842.7A CN108868691B (en) | 2018-06-13 | 2018-06-13 | Pressure-controlled multipurpose test valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810610842.7A CN108868691B (en) | 2018-06-13 | 2018-06-13 | Pressure-controlled multipurpose test valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108868691A true CN108868691A (en) | 2018-11-23 |
| CN108868691B CN108868691B (en) | 2020-07-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810610842.7A Active CN108868691B (en) | 2018-06-13 | 2018-06-13 | Pressure-controlled multipurpose test valve |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4907655A (en) * | 1988-04-06 | 1990-03-13 | Schlumberger Technology Corporation | Pressure-controlled well tester operated by one or more selected actuating pressures |
| CN2512907Y (en) * | 2001-10-12 | 2002-09-25 | 大庆油田有限责任公司 | Large flux stratum detector |
| CN201334894Y (en) * | 2009-01-21 | 2009-10-28 | 沈阳大华测控技术有限公司 | Lifting bore testing valve |
| CN202338276U (en) * | 2011-11-25 | 2012-07-18 | 中国石油天然气股份有限公司 | Downhole shut-in test valve |
| CN203114245U (en) * | 2013-03-16 | 2013-08-07 | 中国石油集团渤海钻探工程有限公司 | Primary switching valve under shaft |
| CN104100202A (en) * | 2014-07-07 | 2014-10-15 | 中国石油集团川庆钻探工程有限公司工程技术研究院 | Starting valve for controlling orientation anchoring of whipstock |
| CN105332699A (en) * | 2015-10-19 | 2016-02-17 | 中国石油化工股份有限公司 | Intelligent valve switch |
| CN205936518U (en) * | 2016-06-24 | 2017-02-08 | 宝鸡市元亨石油设备有限责任公司 | Lockable can be realized and test valve of well function is opened |
-
2018
- 2018-06-13 CN CN201810610842.7A patent/CN108868691B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4907655A (en) * | 1988-04-06 | 1990-03-13 | Schlumberger Technology Corporation | Pressure-controlled well tester operated by one or more selected actuating pressures |
| CN2512907Y (en) * | 2001-10-12 | 2002-09-25 | 大庆油田有限责任公司 | Large flux stratum detector |
| CN201334894Y (en) * | 2009-01-21 | 2009-10-28 | 沈阳大华测控技术有限公司 | Lifting bore testing valve |
| CN202338276U (en) * | 2011-11-25 | 2012-07-18 | 中国石油天然气股份有限公司 | Downhole shut-in test valve |
| CN203114245U (en) * | 2013-03-16 | 2013-08-07 | 中国石油集团渤海钻探工程有限公司 | Primary switching valve under shaft |
| CN104100202A (en) * | 2014-07-07 | 2014-10-15 | 中国石油集团川庆钻探工程有限公司工程技术研究院 | Starting valve for controlling orientation anchoring of whipstock |
| CN105332699A (en) * | 2015-10-19 | 2016-02-17 | 中国石油化工股份有限公司 | Intelligent valve switch |
| CN205936518U (en) * | 2016-06-24 | 2017-02-08 | 宝鸡市元亨石油设备有限责任公司 | Lockable can be realized and test valve of well function is opened |
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| Publication number | Publication date |
|---|---|
| CN108868691B (en) | 2020-07-03 |
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Effective date of registration: 20210830 Address after: 300457 Tianjin Binhai New Area Development Zone Second Avenue 83, China Petroleum Tianjin building Bohai Drilling Engineering Co., Ltd. Patentee after: CNPC Bohai Drilling Engineering Co.,Ltd. Patentee after: CHINA NATIONAL PETROLEUM Corp. Address before: China Petroleum Tianjin building Bohai Drilling Engineering Co., Ltd., No. 83, Second Street, economic and Technological Development Zone, Binhai New Area, Tianjin, 300457 Patentee before: CNPC Bohai Drilling Engineering Co.,Ltd. |