CN204457742U - Downhole electronic pressure bomb hanger - Google Patents
Downhole electronic pressure bomb hanger Download PDFInfo
- Publication number
- CN204457742U CN204457742U CN201520111411.8U CN201520111411U CN204457742U CN 204457742 U CN204457742 U CN 204457742U CN 201520111411 U CN201520111411 U CN 201520111411U CN 204457742 U CN204457742 U CN 204457742U
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- pole
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- cylindrical shell
- upper arm
- hole
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Abstract
The utility model relates to hanger technical field, is a kind of downhole electronic pressure bomb hanger; It comprises center-pole, lower center-pole and connecting axle; Integrally connector is fixed with in the upper end of upper center-pole, linkage is hinged with in the lower end of upper center-pole, the lower end of linkage is pressed on the upper surface of lower center-pole, cylindrical shell is had in the outside of upper center-pole and lower center-pole, there is diameter to be less than upper through hole and the lower through-hole of cylinder internal diameter respectively at the top of cylindrical shell and bottom, the middle part of upper center-pole is sleeved in through hole, and lower center-pole lower end is sleeved in lower through-hole, and the middle part of linkage is provided with axis hole.The utility model reasonable and compact in structure, easy to use, by upper center-pole, lower center-pole, cylindrical shell, upper upper arm and lower upper arm with the use of, realization is put on lower upper arm in the process of center-pole and be in the object of the state of tightening up, there is safe and reliable feature, facilitate operation, improve operating efficiency.
Description
Technical field
the utility model relates to hanger technical field, is a kind of downhole electronic pressure bomb hanger.
Background technology
downhole electronic pressure bomb hanger is used for the suspension of the tester such as well build-in test pressure, temperature of oilfield oil well, by downhole electronic pressure bomb hanger the tester of various function is suspended on any depth location in oil well, to reach the test purpose to oil well.Existing downhole electronic pressure bomb hanger has three-jaw downhole electronic pressure bomb hanger and four paws downhole electronic pressure bomb hanger, downhole electronic pressure bomb hanger is supported in oil well by the suspension arm of himself, three-jaw downhole electronic pressure bomb hanger can not solve downhole electronic pressure bomb hanger and receive the problem that upthrust moves upward, and four paws downhole electronic pressure bomb hanger comprises upper arm and lower upper arm, upthrust and lower punch power can be stoped to cause the problem of downhole electronic pressure bomb hanger movement, the problem that the downhole electronic pressure bomb hanger that solution three-jaw downhole electronic pressure bomb hanger can not stop upthrust to cause moves upward.After tester is completed, by supporting marine salvage equipment, downhole electronic pressure bomb hanger is salvaged well, reached the object of test oil well by the data on read test instrument.
the operating principle of four paws downhole electronic pressure bomb hanger is, when downhole electronic pressure bomb hanger is delegated in the process of oil well with tester, upper upper arm and lower upper arm are in the state of tightening up, be placed in the groove of shell, the state of tightening up of upper upper arm establishes due to center pike pole to be fixed in DISSOLUTION APPARATUS, the state of tightening up of lower upper arm is because DISSOLUTION APPARATUS is provided with a stock, is resisted against in lower upper arm, produces downward pressure to lower upper arm.When downhole electronic pressure bomb hanger reaches desired location, downhole electronic pressure bomb hanger discharges by the DISSOLUTION APPARATUS on downhole electronic pressure bomb hanger top, make upper arm and the release of lower upper arm, be supported on tube inner wall, downhole electronic pressure bomb hanger is supported in tubing wall itself and blocks, by upper upper arm and lower upper arm stop downhole electronic pressure bomb hanger stressed on move or move down.Marine salvage equipment is coordinated to propose outside well by downhole electronic pressure bomb hanger by the fishing head at downhole electronic pressure bomb hanger top after having tested, in the upper process carried, upper upper arm can be in the state of tightening up, and lower upper arm needs to be subject to downward thrust just can be in the state of tightening up, following upper arm is in release conditions upper carrying in process, make resistance in the process of lifting suspension arm larger like this, if run into tube inner wall injustice, the phenomenon that lower upper arm is blocked may be produced, if firmly excessive, lower upper arm can be made to damage and cause more serious lock of tool drilling.
Summary of the invention
the utility model provides a kind of downhole electronic pressure bomb hanger, overcomes the deficiency of above-mentioned prior art, and it effectively can solve electronic pressure gauge hanger under existing well and put forward lower upper arm in process upper to be in release conditions fragile and cause the problem of bit freezing.
the technical solution of the utility model is realized by following measures: a kind of downhole electronic pressure bomb hanger, comprises center-pole, lower center-pole and connecting axle, integrally connector is fixed with in the upper end of upper center-pole, linkage is hinged with in the lower end of upper center-pole, the lower end of linkage is pressed on the upper surface of lower center-pole, cylindrical shell is had in the outside of upper center-pole and lower center-pole, there is diameter to be less than upper through hole and the lower through-hole of cylinder internal diameter respectively at the top of cylindrical shell and bottom, the middle part of upper center-pole is sleeved in through hole, lower center-pole lower end is sleeved in lower through-hole, the middle part of linkage is provided with axis hole, connecting axle is fixedly installed togather through the axis hole on linkage and cylindrical shell, circular base is installed with in the bottom of upper center-pole, on upper circular base, symmetry is installed with fixed block on two, upper fixed block is hinged with upper arm by axle, the upper end of upper upper arm is provided with mounting groove, in upper mounting groove, by axle, torsion spring is installed, one end of upper torsion spring is pressed on fixed block, the other end of upper torsion spring is pressed in upper arm, cylindrical shell has the vertical direction corresponding with upper upper arm on stretch out hole, upper center-pole between upper circular base and the top of cylindrical shell is set with Compress Spring, lower circular base is installed with on the top of lower center-pole, on lower circular base, symmetry is installed with two lower fixed blocks, lower fixed block is hinged with lower upper arm by axle, the upper end of lower upper arm is provided with lower mounting groove, in lower mounting groove, by axle, lower torsion spring is installed, one end of lower torsion spring is pressed on lower fixed block, the other end of torsion spring is pressed in lower upper arm, stretch out hole under cylindrical shell has the vertical direction corresponding with lower upper arm, the lower center-pole between lower circular base and the bottom of cylindrical shell is set with lower Compress Spring.
here is the further optimization and/or improvements to above-mentioned utility model technical scheme:
aforementioned link mechanism comprises two connecting rods and two push rods; Two contiguous blocks are fixedly connected with in the lower end of upper center-pole, two contiguous blocks are hinged by axle with one end of two connecting rods respectively, the other end of two connecting rods is hinged by axle with the upper end of two push rods respectively, axis hole is respectively arranged with at the middle part of two push rods, connecting axle is fixedly mounted in cylindrical shell, two connecting rods are that scissor-shaped is arranged on connecting axle by axis hole, and the lower end of two push rods is pressed on the upper surface of lower center-pole respectively.
the above-mentioned lower end at push rod is integrally fixed with downward opening arc body, in arc body, be provided with spin by axle.
the above-mentioned lower end in upper upper arm is integrally fixed with leg, and the medial surface of upper leg is up-narrow and down-wide inclined-plane, and the lateral surface of upper leg is outwardly cambered surface, and the lateral surface of upper leg is distributed with the groove of fore-and-aft direction.
the above-mentioned lower end in lower upper arm is integrally fixed with lower support leg, and the medial surface of lower support leg is inclined-plane wide at the top and narrow at the bottom, and the lateral surface of lower support leg is outwardly cambered surface, and the lateral surface of lower support leg is distributed with the groove of fore-and-aft direction.
the lateral surface above-mentioned correspondence being stretched out the cylindrical shell of hole lower position is up-narrow and down-wide inclined-plane; Or/and the lateral surface stretching out the cylindrical shell of hole upper position under correspondence is inclined-plane wide at the top and narrow at the bottom.
the external diameter of above-mentioned connector is greater than the top external diameter of center-pole; Or/and, the connecting portion for connecting test instrument is installed with in the lower end of cylindrical shell.
the utility model reasonable and compact in structure, easy to use, by upper center-pole, lower center-pole, cylindrical shell, upper upper arm and lower upper arm with the use of, realization is put on lower upper arm in the process of center-pole and be in the object of the state of tightening up, there is safe and reliable feature, facilitate operation, improve operating efficiency.
Accompanying drawing explanation
accompanying drawing 1 is the main TV structure schematic diagram of the utility model most preferred embodiment.
accompanying drawing 2 looks sectional structure schematic diagram for master when the utility model removes connecting portion.
accompanying drawing 3 is diagrammatic side-view cross-sectional structural representation when the utility model removes connecting portion.
accompanying drawing 4 is that the master of push rod in the utility model looks sectional structure schematic diagram.
accompanying drawing 5 is internal construction schematic diagram when the utility model removes cylindrical shell and connecting portion.
accompanying drawing 6 is the axle side schematic diagram of accompanying drawing 5.
coding in accompanying drawing is respectively: 1 is upper center-pole, 2 is lower center-pole, 3 is connecting axle, 4 is connector, 5 is cylindrical shell, 6 is upper through hole, 7 is lower through-hole, 8 is upper circular base, 9 is upper fixed block, 10 is upper upper arm, 11 is upper torsion spring, 12 on stretch out hole, 13 is upper Compress Spring, 14 is lower circular base, 15 is lower fixed block, 16 is lower upper arm, 17 is lower torsion spring, 18 be under stretch out hole, 19 is lower Compress Spring, 20 is connecting rod, 21 is push rod, 22 is arc body, 23 is spin, 24 is upper leg, 25 is groove, 26 is lower support leg, 27 is connecting portion.
Detailed description of the invention
the utility model by the restriction of following embodiment, can not determine concrete embodiment according to the technical solution of the utility model and actual conditions.
in the utility model, for convenience of description, the description of the relative position relation of each parts is all be described according to the Butut mode of Figure of description 1, as: the position relationship of forward and backward, upper and lower, left and right etc. determines according to the Butut direction of Figure of description 1.
below in conjunction with embodiment and accompanying drawing, the utility model is further described:
as shown in accompanying drawing 1,2,3,4,5,6, this downhole electronic pressure bomb hanger comprises center-pole 1, lower center-pole 2 and connecting axle 3, connector 4 is integrally fixed with in the upper end of upper center-pole 1, linkage is hinged with in the lower end of upper center-pole 1, the lower end of linkage is pressed on the upper surface of lower center-pole 2, cylindrical shell 5 is had in the outside of upper center-pole 1 and lower center-pole 2, there is diameter to be less than upper through hole 6 and the lower through-hole 7 of cylinder internal diameter respectively at the top of cylindrical shell 5 and bottom, the middle part of upper center-pole is sleeved in through hole 6, lower center-pole 2 lower end is sleeved in lower through-hole 7, the middle part of linkage is provided with axis hole, connecting axle 3 is fixedly installed togather through the axis hole on linkage and cylindrical shell 5, circular base 8 is installed with in the bottom of upper center-pole 1, on upper circular base 8, symmetry is installed with fixed block 9 on two, upper fixed block 9 is hinged with upper arm 10 by axle, the upper end of upper upper arm 10 is provided with mounting groove, in upper mounting groove, by axle, torsion spring 11 is installed, one end of upper torsion spring 11 is pressed on fixed block 9, the other end of upper torsion spring 11 is pressed in upper arm 10, cylindrical shell 5 has the vertical direction corresponding with upper upper arm 10 on stretch out hole 12, upper center-pole 1 between upper circular base 8 and the top of cylindrical shell 5 is set with Compress Spring 13, lower circular base 14 is installed with on the top of lower center-pole 2, on lower circular base 14, symmetry is installed with two lower fixed blocks 15, lower fixed block 15 is hinged with lower upper arm 16 by axle, the upper end of lower upper arm 16 is provided with lower mounting groove, in lower mounting groove, by axle, lower torsion spring 17 is installed, one end of lower torsion spring 17 is pressed on lower fixed block 15, the other end of torsion spring is pressed in lower upper arm 16, hole 18 is stretched out under cylindrical shell 5 has the vertical direction corresponding with lower upper arm 16, lower center-pole 2 between lower circular base 14 and the bottom of cylindrical shell 5 is set with lower Compress Spring 19.Like this, made to put on lower upper arm 16 in the process of center-pole 1 by upper center-pole 1, lower center-pole 2, cylindrical shell 5, upper upper arm 10 and lower upper arm 16 and be in the object of the state of tightening up, there is safe and reliable feature, facilitate operation, improve operating efficiency.
according to actual needs, above-mentioned downhole electronic pressure bomb hanger can be made further optimization and/or improvements:
as shown in accompanying drawing 2,3,4,5,6, linkage comprises two connecting rods 20 and two push rods 21; Two contiguous blocks are fixedly connected with in the lower end of upper center-pole 1, two contiguous blocks are hinged by axle with one end of two connecting rods 20 respectively, the other end of two connecting rods 20 is hinged by axle with the upper end of two push rods 21 respectively, axis hole is respectively arranged with at the middle part of two push rods 21, connecting axle 3 is fixedly mounted in cylindrical shell 5, two connecting rods 20 are that scissor-shaped is arranged on connecting axle 3 by axis hole, and the lower end of two push rods 21 is pressed on the upper surface of lower center-pole 2 respectively.Like this, make upper center-pole 1 in the upper process carried by two connecting rods 20 and two push rods 21, push rod 21 rotates and becomes vertical direction, and then downward thrust is produced to the lower center-pole 2 of below, the lower upper arm 16 that lower center-pole 2 connects is tightened up because lower center-pole 2 moves downward, solve in prior art upper carry downhole electronic pressure bomb hanger time, the problem that lower upper arm 16 can not be regained and bring.
as shown in accompanying drawing 2,3,4,5,6, be integrally fixed with downward opening arc body 22 in the lower end of push rod 21, in arc body 22, by axle, spin 23 be installed.Like this, the spherical rotation being convenient to push rod 21.
as shown in accompanying drawing 2,3,5,6, leg 24 is integrally fixed with in the lower end of upper upper arm 10, the medial surface of upper leg 24 is up-narrow and down-wide inclined-plane, and the lateral surface of upper leg 24 is outwardly cambered surface, and the lateral surface of upper leg 24 is distributed with the groove 25 of fore-and-aft direction.Like this, the groove 25 on upper leg 24 is convenient to increasing friction force, more surely when making upper arm 10 be in release conditions is supported on the inwall of oil pipe; Upper leg 24 replaces roller of the prior art, solves existing roller and easily damages and cause the problem be stuck in well, and stability is better, and the utility model is better hung on tube inner wall.
as shown in accompanying drawing 2,3,5,6, lower support leg 26 is integrally fixed with in the lower end of lower upper arm 16, the medial surface of lower support leg 26 is inclined-plane wide at the top and narrow at the bottom, and the lateral surface of lower support leg 26 is outwardly cambered surface, and the lateral surface of lower support leg 26 is distributed with the groove 25 of fore-and-aft direction.Like this, the groove 25 on lower support leg 26 is convenient to increasing friction force, more surely when making lower upper arm 16 be in release conditions is supported on the inwall of oil pipe; Lower support leg 26 replaces roller of the prior art, solves existing roller and easily damages and cause the problem be stuck in well, and stability is better, and the utility model is better hung on tube inner wall.
as shown in accompanying drawing 2,3, lateral surface correspondence being stretched out the cylindrical shell 5 of hole 12 lower position is up-narrow and down-wide inclined-plane; Or/and the lateral surface stretching out the cylindrical shell 5 of hole 18 upper position under correspondence is inclined-plane wide at the top and narrow at the bottom.Like this, be convenient to the release of upper arm 10 and lower upper arm 16 and tighten up.
as shown in accompanying drawing 1,2,3,5,6, the external diameter of connector 4 is greater than the top external diameter of center-pole 1; Or/and, the connecting portion 27 for connecting test instrument is installed with in the lower end of cylindrical shell 5.Like this, connecting portion 27 is convenient to installation testing instrument.
above technical characteristic constitutes most preferred embodiment of the present utility model, and it has stronger compliance and best implementation result, can increase and decrease non-essential technical characteristic according to actual needs, meet the demand of different situations.
the use procedure of the utility model most preferred embodiment: during work, connecting portion 27 of the present utility model hangs tester, transfer the utility model, by the tester that wire rope will connect from bottom to up successively, the utility model, DISSOLUTION APPARATUS, micro machine is transferred in oil well, the utility model is discharged by DISSOLUTION APPARATUS when arriving test position, in decentralization process, the connector 4 on the utility model is caught on by DISSOLUTION APPARATUS, center-pole 1 is made to be in the state of lift, now go up upper arm 10 and be in the state of tightening up, when upper center-pole 1 is in lift, by push rod 21, downward thrust is applied to lower center-pole 2, lower center-pole 2 is moved down, lower upper arm 16 is driven to be in the state of tightening up downwards, after the utility model is released, upper center-pole 1 moves downward, and makes upper arm 10 stretch out hole 12 and lateral surface along the cylindrical shell 5 above stretching out hole 12 lower position slides to off-position, is in release conditions, is supported on the inwall of oil pipe, after disappearing with the thrust that center-pole 2 is subject at present, elastic force is upwards produced by the lower Compress Spring 19 on lower center-pole 2, stretch out hole 18 under lower upper arm 16 is stretched out and along under stretch out the cylindrical shell 5 of hole 18 upper position lateral surface slide to off-position, be in release conditions, be supported on the inwall of oil pipe, make the utility model hang on tube inner wall, oil well is carried out to the measurement of relevant parameter, after measurement completes, transfer marine salvage equipment and marine salvage equipment is set on connector 4 of the present utility model, carry marine salvage equipment then, the utility model and tester are proposed outside well in the lump, just obtains the relevant parameter in well, on carry in process center-pole 1 moved upward, in drive, upper arm 10 moves up and the upper leg 24 in upper arm 10 is positioned at stretch out hole 12, upper arm 10 is made to be in the state of tightening up, same center-pole 2 is at present subject to the downward thrust that push rod 21 produces, under driving, upper arm 16 stretches out hole 18 under moving down and the lower support leg 26 in lower upper arm 16 being positioned at, lower upper arm 16 is made to be in the state of tightening up, ensure that in the process putting on center-pole 1, lower upper arm 16 is in the state of tightening up, and decreases the situation of being obstructed in the process of putting forward, eliminate the stock against lower upper arm 16 in existing DISSOLUTION APPARATUS.
Claims (10)
1. a downhole electronic pressure bomb hanger, is characterized in that comprising center-pole, lower center-pole and connecting axle, integrally connector is fixed with in the upper end of upper center-pole, linkage is hinged with in the lower end of upper center-pole, the lower end of linkage is pressed on the upper surface of lower center-pole, cylindrical shell is had in the outside of upper center-pole and lower center-pole, there is diameter to be less than upper through hole and the lower through-hole of cylinder internal diameter respectively at the top of cylindrical shell and bottom, the middle part of upper center-pole is sleeved in through hole, lower center-pole lower end is sleeved in lower through-hole, the middle part of linkage is provided with axis hole, connecting axle is fixedly installed togather through the axis hole on linkage and cylindrical shell, circular base is installed with in the bottom of upper center-pole, on upper circular base, symmetry is installed with fixed block on two, upper fixed block is hinged with upper arm by axle, the upper end of upper upper arm is provided with mounting groove, in upper mounting groove, by axle, torsion spring is installed, one end of upper torsion spring is pressed on fixed block, the other end of upper torsion spring is pressed in upper arm, cylindrical shell has the vertical direction corresponding with upper upper arm on stretch out hole, upper center-pole between upper circular base and the top of cylindrical shell is set with Compress Spring, lower circular base is installed with on the top of lower center-pole, on lower circular base, symmetry is installed with two lower fixed blocks, lower fixed block is hinged with lower upper arm by axle, the upper end of lower upper arm is provided with lower mounting groove, in lower mounting groove, by axle, lower torsion spring is installed, one end of lower torsion spring is pressed on lower fixed block, the other end of torsion spring is pressed in lower upper arm, stretch out hole under cylindrical shell has the vertical direction corresponding with lower upper arm, the lower center-pole between lower circular base and the bottom of cylindrical shell is set with lower Compress Spring.
2. downhole electronic pressure bomb hanger according to claim 1, is characterized in that linkage comprises two connecting rods and two push rods; Two contiguous blocks are fixedly connected with in the lower end of upper center-pole, two contiguous blocks are hinged by axle with one end of two connecting rods respectively, the other end of two connecting rods is hinged by axle with the upper end of two push rods respectively, axis hole is respectively arranged with at the middle part of two push rods, connecting axle is fixedly mounted in cylindrical shell, two connecting rods are that scissor-shaped is arranged on connecting axle by axis hole, and the lower end of two push rods is pressed on the upper surface of lower center-pole respectively.
3. downhole electronic pressure bomb hanger according to claim 1 and 2, is characterized in that the lower end of push rod is integrally fixed with downward opening arc body, in arc body, is provided with spin by axle.
4. downhole electronic pressure bomb hanger according to claim 1 and 2, it is characterized in that the lower end of upper arm is integrally fixed with leg, the medial surface of upper leg is up-narrow and down-wide inclined-plane, the lateral surface of upper leg is outwardly cambered surface, and the lateral surface of upper leg is distributed with the groove of fore-and-aft direction.
5. downhole electronic pressure bomb hanger according to claim 3, it is characterized in that the lower end of upper arm is integrally fixed with leg, the medial surface of upper leg is up-narrow and down-wide inclined-plane, the lateral surface of upper leg is outwardly cambered surface, and the lateral surface of upper leg is distributed with the groove of fore-and-aft direction.
6. the downhole electronic pressure bomb hanger according to claim 1 or 2 or 5, it is characterized in that the lower end of lower upper arm is integrally fixed with lower support leg, the medial surface of lower support leg is inclined-plane wide at the top and narrow at the bottom, the lateral surface of lower support leg is outwardly cambered surface, and the lateral surface of lower support leg is distributed with the groove of fore-and-aft direction.
7. downhole electronic pressure bomb hanger according to claim 4, it is characterized in that the lower end of lower upper arm is integrally fixed with lower support leg, the medial surface of lower support leg is inclined-plane wide at the top and narrow at the bottom, the lateral surface of lower support leg is outwardly cambered surface, and the lateral surface of lower support leg is distributed with the groove of fore-and-aft direction.
8. the downhole electronic pressure bomb hanger according to claim 1 or 2 or 5 or 7, is characterized in that the lateral surface of cylindrical shell correspondence being stretched out hole lower position is up-narrow and down-wide inclined-plane; Or/and the lateral surface stretching out the cylindrical shell of hole upper position under correspondence is inclined-plane wide at the top and narrow at the bottom.
9. downhole electronic pressure bomb hanger according to claim 6, is characterized in that the lateral surface of cylindrical shell correspondence being stretched out hole lower position is up-narrow and down-wide inclined-plane; Or/and the lateral surface stretching out the cylindrical shell of hole upper position under correspondence is inclined-plane wide at the top and narrow at the bottom.
10. downhole electronic pressure bomb hanger according to claim 9, is characterized in that the external diameter of connector is greater than the top external diameter of center-pole; Or/and, the connecting portion for connecting test instrument is installed with in the lower end of cylindrical shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520111411.8U CN204457742U (en) | 2015-02-15 | 2015-02-15 | Downhole electronic pressure bomb hanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520111411.8U CN204457742U (en) | 2015-02-15 | 2015-02-15 | Downhole electronic pressure bomb hanger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204457742U true CN204457742U (en) | 2015-07-08 |
Family
ID=53664644
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520111411.8U Withdrawn - After Issue CN204457742U (en) | 2015-02-15 | 2015-02-15 | Downhole electronic pressure bomb hanger |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204457742U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104675383A (en) * | 2015-02-15 | 2015-06-03 | 中国石油集团西部钻探工程有限公司 | Underground electronic pressure gage hanger |
-
2015
- 2015-02-15 CN CN201520111411.8U patent/CN204457742U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104675383A (en) * | 2015-02-15 | 2015-06-03 | 中国石油集团西部钻探工程有限公司 | Underground electronic pressure gage hanger |
| CN104675383B (en) * | 2015-02-15 | 2017-08-22 | 中国石油集团西部钻探工程有限公司 | Downhole electronic pressure bomb hanger |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20150708 Effective date of abandoning: 20170822 |