CN106968650A - It is a kind of to administer surface pipe and the method for gas-bearing formation casing annulus has channeling - Google Patents
It is a kind of to administer surface pipe and the method for gas-bearing formation casing annulus has channeling Download PDFInfo
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- CN106968650A CN106968650A CN201710168413.4A CN201710168413A CN106968650A CN 106968650 A CN106968650 A CN 106968650A CN 201710168413 A CN201710168413 A CN 201710168413A CN 106968650 A CN106968650 A CN 106968650A
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- gas
- surface pipe
- bearing formation
- channeling
- pipe
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/11—Perforators; Permeators
- E21B43/119—Details, e.g. for locating perforating place or direction
- E21B43/1195—Replacement of drilling mud; decrease of undesirable shock waves
Abstract
The invention belongs to exploration of oil and gas field and development technique field, and in particular to a kind of improvement surface pipe and the method for gas-bearing formation casing annulus has channeling, comprise the following steps:Kill-job simultaneously acts tubing string in well；Beat drilling bridging plug；Perforation is carried out to gas-bearing formation sleeve pipe on drilling bridging plug；At well head operating pit is being excavated outside surface pipe；The punching with pressure on surface pipe, regulating gate is installed in tapping；Relief line is picked out by regulating gate；Open regulating gate and be controlled open flow；Open well head tripping in coiled tubing；Open sleeve gate water flushing；Superfine cement slurry is pumped into coiled tubing pipe until the relief line outlet that tapping is connected has cement mortar to return out；Closing control gate, continues the 3m3 of infusion cement mortar 1；Stop infusion, act coiled tubing, close shaft collar；Hou Ning with pressure at least 48 hours；Therefore, this method is used to solve the problem of sleeve pipe has the common caused surface pipe of leak source and gas-bearing formation casing annulus has channeling, safeguards that pit shaft is complete, it is to avoid gas well premature failure, this method principle is simple and convenient to operate, economically feasible.
Description
Technical field
The invention belongs to exploration of oil and gas field and development technique field, and in particular to one kind administers surface pipe and gas-bearing formation sleeve pipe
The method of annular channeling.
Background technology
As the gas-field exploitation time gradually increases, Wellbore of Gas Wells seal failure problem increases year by year, causes Wellbore of Gas Wells close
The reason for envelope failure, is mainly production casing corrosion failure, formation creep and causes to take off at production casing deformation breakage or connection screw thread
Button etc..Gas into pit shaft can enter the annular space of surface pipe and production casing along above-mentioned seal failure, be filled in annular space
In gap, it is then up and close in surface pipe and gas-bearing formation casing annulus along annular space in the presence of bottom pressure
Assemble at well head, finally revealed from surface pipe at certain connection screw thread of well head.Some audible obvious gases of well are let out
Leakage sound, it is some to measure certain pressure, separately there are some well gas to be leaked out from the ground near well head.In addition, above-mentioned ring
The problem of air is altered typically occur in one open rear cementing concrete not on return on the well on ground.
The technology of existing processing surface pipe and gas-bearing formation casing annulus has channeling problem is a kind of leak-stopping technology, is specially to protect
Hold production status it is constant in the case of, contain the leakage point on surface pipe with fixture, set up new sealing cavity, with higher than letting out
The thrust of system media pressure is leaked, injects and enough seal pressures is reached in Special seal agent, annular seal space, leakage is prevented, is formed
New sealing structure.Refer to patent：A kind of new tape-pressure leakage clogging device (ZL201420077277.X).
The technological deficiency substantially, mainly without fundamentally cut-out leakage source of the gas, will be filled in annular space space
Leakage gas replace out, do not block well cementation mud it is cementing after the space left and well cementation the mud ring that does not return to ground and leave
Absolutely empty gap.
The content of the invention
The purpose of the present invention be overcome in the prior art gas well one open with two open rear cementing concrete do not return to ground, production after
The problem of there is the common caused surface pipe of leak source and gas-bearing formation casing annulus has channeling in gas-bearing formation sleeve pipe.
Therefore, administering surface pipe and the method for gas-bearing formation casing annulus has channeling, including following step the invention provides a kind of
Suddenly：1) kill-job and rise well in tubing string；2) drilling bridging plug is beaten at 200m in the wellbore under surface pipe bottom, and pair can
Brill formula bridging plug carries out pressure testing；3) perforation is being carried out to gas-bearing formation sleeve pipe at 100m on drilling bridging plug；4) gate is put by set to pick out
Relief line is controlled open flow and lighted a fire；5) operating pit is being excavated outside surface pipe at well head；6) on surface pipe away from
The punching with pressure of well head 2.5m depths, regulating gate is installed in tapping；7) relief line is picked out by regulating gate, and by open flow
Pipeline is fixed；8) open regulating gate and be controlled open flow；9) well head tripping in coiled tubing is opened, depth of setting is drillable bridge
Fill at plug face above 100m；10) sleeve gate water flushing is opened；11) sleeve gate is closed, tapping regulating gate is kept
Open, the infusion clear water in coiled tubing pipe；12) superfine cement slurry is pumped into coiled tubing pipe up to putting that tapping is connected
Spray pipeline outlet has cement mortar to return out；13) closing control gate, continues infusion cement mortar 1-3m3；14) stop infusion, rise and to connect
Continuous oil pipe, closes shaft collar；15) Hou Ning with pressure at least 48 hours；16) mill tool string is bored in tripping in, by cement plug in pit shaft and
Drilling bridging plug is bored and removed, and is rinsed to artificial bottom of a well；17) wellbore pressure test；18) relief line of tapping connection is removed, closure is opened
Hole and backfilling working hole.
Described step 3) in perforation penetration depth be less than cement sheath thickness.
Described step 6) in regulating gate there is 35MPa bearing capacity and the pressure of identical pressure-bearing grade is connected
Table, the open pore size of punching with pressure is not less than 50mm.
Described step 9) in coiled tubing caliber be not less than 2.875 inches.
Described step 10) in well-flushing be direct flushing, discharge capacity is not less than 500L/min, and clear water enters by coiled tubing
Enter and returned out through sleeve gate.
Described step 13) in cement mortar be superfine cement slurry system.
Described step 16) in brill mill tool string include check valve, screw drill, junk mill and drill bit, check valve, screw rod
Bore, junk mill and drill bit are sequentially connected from top to bottom.
Described blowout prevention pipeline is hard blowout prevention pipeline.
Beneficial effects of the present invention：This improvement surface pipe that the present invention is provided and the side of gas-bearing formation casing annulus has channeling
Method, can replace out the leak fluid being filled in gas well surface pipe and gas-bearing formation casing annulus, then is replaced into and meets engine request
Superfine cement slurry, finally realize Hou Ning with pressure.The pit shaft seal failure in gas well liquid loading, i.e. gas well one can effectively be solved the problems, such as
Open rear cementing concrete do not return to ground, two open rear cementing concrete do not return to ground, production after gas-bearing formation sleeve pipe there is the common institute of leak source
The problem of surface pipe and gas-bearing formation casing annulus has channeling of cause, safeguard that pit shaft is complete, it is to avoid gas well premature failure, this method principle
Be simple and convenient to operate, economically feasible.
Brief description of the drawings
The present invention is described in further details below with reference to accompanying drawing.
Fig. 1 is a kind of improvement surface pipe and the schematic diagram of gas-bearing formation casing annulus has channeling method.
Description of reference numerals：1st, surface pipe；2nd, preforation tunnel；3rd, artificial bottom of a well；4th, two spudding well well border；5 gas
Layer sleeve pipe；6th, drilling bridging plug；7 one spudding well well borders；8th, the annular space between surface pipe and gas-bearing formation sleeve pipe；9th, top layer covers
Annular space between pipe and stratum；10th, one open rear cementing concrete and return high interface；11st, regulating gate；12nd, operating pit；13rd, two open
Cementing concrete returns high interface afterwards.
Embodiment
Embodiment 1：
As shown in figure 1, this method for administering surface pipe and gas-bearing formation casing annulus has channeling, 1) kill-job and act well inner tube
Post；2) drilling bridging plug is beaten at 200m in the wellbore under the bottom of surface pipe 1, and pressure testing is carried out to drilling bridging plug；3)
Perforation is being carried out to gas-bearing formation sleeve pipe 5 at 100m on drilling bridging plug；4) gate is put by set pick out relief line and be controlled and put
Spray and light a fire；5) operating pit 12 is being excavated at well head outside surface pipe 1；6) away from well head 2.5m depths on surface pipe 1
Punching with pressure, regulating gate 11 is installed in tapping；7) relief line is picked out by regulating gate 11, and relief line is fixed；
8) open regulating gate 11 and be controlled open flow；9) well head tripping in coiled tubing is opened, depth of setting is drilling bridging plug plug face
At above 100m；10) sleeve gate water flushing is opened；11) sleeve gate is closed, keeps tapping regulating gate to open,
The infusion clear water in coiled tubing pipe；12) superfine cement slurry is pumped into coiled tubing pipe until the blooie pipe that tapping is connected
Line outlet has cement mortar to return out；13) closing control gate 11, continues infusion cement mortar 1-3m3；14) stop infusion, rise continuous
Oil pipe, closes shaft collar；15) Hou Ning with pressure at least 48 hours；16) mill tool string is bored in tripping in, by cement plug in pit shaft and can
Brill formula bridging plug is bored and removed, and is rinsed to artificial bottom of a well；17) wellbore pressure test；18) relief line of tapping connection is removed, perforate is blocked
And backfilling working hole 12, this kind, which administers surface pipe and the method for gas-bearing formation casing annulus has channeling, to be used to solve in gas well liquid loading
Pit shaft seal failure problem, i.e. gas well one open with two open rear cementing concrete do not return to ground, production after gas-bearing formation sleeve pipe there is leak source
The production problem of surface pipe and gas-bearing formation casing annulus has channeling caused by common, safeguards that pit shaft is complete, it is to avoid gas well premature failure,
This method principle is simple and convenient to operate, economically feasible.
Embodiment 2：
As shown in figure 1, on the basis of embodiment 1, described step 2 carries out pressure testing to drilling bridging plug should refer to gas-bearing formation
The bearing capacity of sleeve pipe carries out pressure testing to bridging plug.
The penetration depth of perforation is less than the thickness of cement sheath in described step 3, it is to avoid connect water layer with pit shaft,
If cement mortar can not be returned to from water layer leakage when the thickness that the penetration depth of perforation exceedes cement sheath can cause subsequently to replace cement mortar
Ground blowout prevention pipeline, causes this to administer surface pipe and fails with gas-bearing formation casing annulus has channeling.
The step 4 puts gate by set and picks out hard relief line, and open flow is controlled to borehole fluid and igniting is attempted,
Open flow can avoid using soft to returning out without fluid or returning out closing well after fluid flow stabilization after fixing using hard relief line
Borehole fluid pressure is higher during pipeline open flow causes pipeline swing to injure shaft mouth operation personnel, it is ensured that construction safety；
The depth of operating pit 12 in described step 5 is 3m, and space size accommodates 3-5 people and works hard there is provided installing simultaneously
Matter relief line installing space and installation effectiveness, operating pit can be using mechanical equivalent of light excavation such as artificial or excavators, according to machinery side
Special messenger is answered to command operation to damage wellhead casing pipe and other wellhead installations when preventing mechanical equivalent of light excavation during formula slips.
Regulating gate 11 in described step 6 has 35MPa bearing capacity and connects the pressure of identical pressure-bearing grade
Table, it is considered to which gas field well head pressure is safe and reliable using 35MPa bearing capacity regulating gate generally in 20-25MPa, using phase
Pressure gauge with the pressure gauge of the pressure-bearing grade range can accurately read pressure value, and ginseng is provided to judge whether fluid flow is stable
Examine, according to 70MPa pressure-bearing grades pressure gauge caused by range crosses conference data read error, the open pore size of punching with pressure
Not less than 50mm, punching with pressure operational procedure as known to industry carries out operation.
Coiled tubing caliber in described step 9 is not less than 2.875 inches, can avoid because coiled tubing caliber is less than
2.875 inches be pumped into superfine cement slurry when pump truck operational pressure it is too high, can effectively improve construction using 2.875 inches of coiled tubings
Discharge capacity, shortens the engineering time, cuts down construction risk.
Well-flushing in described step 10 is direct flushing, and discharge capacity is not less than 500L/min, and clear water is entered by coiled tubing
Enter and returned out through sleeve gate, discharge capacity can not recycle debris in well in a short time when being less than 500L/min, improve construction quality.
Described step 11 closes sleeve gate, keeps tapping regulating gate to open, infusion is clear in coiled tubing pipe
Whether water, the relief line outlet observed and record tapping connection goes out liquid, liquid outlet quantity and line pressure, as tapping is connected
Relief line exports out liquid normally and pressure is in normal range (NR), confirms surface pipe and gas-bearing formation casing annulus space circulation canal
Unimpeded to continue infusion clear water without leakage, record liquid outlet quantity and line pressure, the pump output of clear water is no less than 2 times of drillable bridge
Fill in the hole volume of the above, it is ensured that well-flushing is clean in well head to drilling bridging plug pit shaft, it is to avoid the foreign matter when later stage replaces cement job
Circulation canal is blocked, construction quality is improved.
Cement mortar in described step 13 is superfine cement slurry system, has good concrete castability using superfine cement slurry,
It can penetrate into fine sand flour sand mixed layer, silty sand ground and powder soil horizon that ordinary cement particle can not permeate, effective sealing surface pipe
With gas-bearing formation casing annulus space, preparing superfine cement slurry superfine cement used can use under high water-cement ratio, in high water-cement ratio
Under still have higher consolidated sand strength, sealing surface pipe and gas-bearing formation casing annulus has channeling construction requirement can be met, and realize
High-durability and reduction production cost.
In described step 16 brill mill tool string include check valve, screw drill, junk mill or drill bit, check valve, screw drill,
Junk mill or drill bit are sequentially connected from top to bottom.
Embodiment 3：
As shown in figure 1, on the basis of embodiment 1-2, specific case study on implementation：
The present embodiment provides a kind of method for administering surface pipe and gas-bearing formation casing annulus has channeling, comprises the following steps：
1) the two of certain cased hole completion open gas well surface pipe external diameter 244.5mm, grade of steel J55, depth of setting 506m；Gas-bearing formation set
Pipe external diameter 139.7mm, grade of steel N80, depth of setting 3570m；Artificial bottom of a well 3560m；The well is entered using envelope fracturing string on former list
Row production, production finds that surface pipe has leak source at well head 1.5m after 2 years, has obvious gas leakage sound, after testing may be used
Combustion gas body is exceeded, it is possible to determine that occur gas channeling phenomenon with gas-bearing formation casing annulus for surface pipe；The well uses two-cycle method pressure
After well, tubing string in well is acted；
2) cable transfer mode is used, drilling bridging plug 1, bridging plug external diameter 110mm, bridge are beaten at the deep well of well 700
Plug sets pressure after normal, wellbore pressure test 55MPa, stable 30min and not dropped.It can be determined that, the leak point on gas-bearing formation sleeve pipe is located at
700m is with well-sinking somewhere；
3) perforation at well 600m pit shafts, penetration depth is less than cement thickness.Open set and put gate and be controlled and put
Spray, does not go out liquid, lights a fire non-ignitable.The operating pit that deep about 3m is excavated outside surface pipe is in well head；
4) punching with pressure is carried out away from well head 2.5m depths on surface pipe, open pore size 50mm is installed in tapping
There are the regulating gate of threaded connection, connection pressure-bearing 35MPa blowdown line, earth anchorage of the blowdown line with cement foundation pier.
Open regulating gate and carry out pressure release, igniting combustion, flame Huang is red, long 3-5m.After open flow 3 hours, light a fire non-ignitable；
5) at 2.875 inches of coiled tubings to 602m well depths, with clear water with 650L/min discharge capacities direct flushing 3 weeks,
It is washed till import and export water colour consistent.Sleeve gate is closed, keeps tapping regulating gate to open, with 200L/min discharge capacity by continuous
Oil pipe is pumped into clear water about 25m3, pump-in pressure fluctuates in 15-31MPa, by tapping to return output basically identical with the amount of being pumped into,
Pressure stability.Density is pumped into for 1.87kg/m by coiled tubing3Superfine cement slurry 15m3Afterwards, it is seen that surface pipe tapping connects
The outlet of the relief line connect has cement mortar to return out.The regulating gate of tapping connection is closed, continuation is pumped into water by coiled tubing
Mud 3m3.Act coiled tubing, close well head, Hou Ning with pressure 72 hours；
6) oil pipe, which is bored, under removes cement plug and drilling bridging plug, rinses to artificial bottom of a well, wellbore pressure test is qualified；
7) welding closure tapping, backfills operating pit.
It is exemplified as above be only to the present invention for example, do not constitute the limitation to protection scope of the present invention, it is all
It is to be belonged to the same or analogous design of the present invention within protection scope of the present invention.
Claims (8)
1. a kind of administer surface pipe and the method for gas-bearing formation casing annulus has channeling, it is characterised in that comprises the following steps：
1) kill-job and rise well in tubing string；
2) drilling bridging plug is beaten at 200m in the wellbore under surface pipe (1) bottom, and pressure testing is carried out to drilling bridging plug；
3) perforation is being carried out to gas-bearing formation sleeve pipe (5) at 100m on drilling bridging plug；
4) gate is put by set pick out relief line and be controlled open flow and light a fire；
5) operating pit (12) is excavated outside surface pipe (1) at well head；
6) regulating gate (11) is installed in tapping away from the punching with pressure of well head 2.5m depths on surface pipe (1)；
7) relief line is picked out by regulating gate (11), and relief line is fixed；
8) open regulating gate (11) and be controlled open flow；
9) well head tripping in coiled tubing is opened, depth of setting is at the above 100m of drilling bridging plug plug face；
10) sleeve gate water flushing is opened；
11) sleeve gate is closed, keeps tapping regulating gate to open, the infusion clear water in coiled tubing pipe；
12) superfine cement slurry is pumped into coiled tubing pipe until the relief line outlet that tapping is connected has cement mortar to return out；
13) closing control gate (11), continue infusion cement mortar 1-3m3；
14) stop infusion, act coiled tubing, close shaft collar；
15) Hou Ning with pressure at least 48 hours；
16) mill tool string is bored in tripping in, and cement plug in pit shaft and drilling bridging plug are bored and removed, is rinsed to artificial bottom of a well；
17) wellbore pressure test；
18) relief line of tapping connection, closure perforate and backfilling working hole (12) are removed.
2. surface pipe and the method for gas-bearing formation casing annulus has channeling are administered as claimed in claim 1, it is characterised in that：Described
Step 3) in perforation penetration depth be less than cement sheath thickness.
3. surface pipe and the method for gas-bearing formation casing annulus has channeling are administered as claimed in claim 1, it is characterised in that：Described
Step 6) in regulating gate (11) there is 35MPa bearing capacity and the pressure gauge of identical pressure-bearing grade is connected, punching with pressure
Open pore size be not less than 50mm.
4. surface pipe and the method for gas-bearing formation casing annulus has channeling are administered as claimed in claim 1, it is characterised in that：Described
Step 9) in coiled tubing caliber be not less than 2.875 inches.
5. surface pipe and the method for gas-bearing formation casing annulus has channeling are administered as claimed in claim 1, it is characterised in that：Described
Step 10) in well-flushing be direct flushing, discharge capacity be not less than 500L/min, clear water by coiled tubing enter is returned through sleeve gate
Go out.
6. surface pipe and the method for gas-bearing formation casing annulus has channeling are administered as claimed in claim 1, it is characterised in that：Described
Step 13) in cement mortar be superfine cement slurry system.
7. surface pipe and the method for gas-bearing formation casing annulus has channeling are administered as claimed in claim 1, it is characterised in that：Described
Step 16) in brill mill tool string include check valve, screw drill, junk mill and drill bit, check valve, screw drill, junk mill and drill bit from
It is sequentially connected under above.
8. surface pipe and the method for gas-bearing formation casing annulus has channeling are administered as claimed in claim 1, it is characterised in that：Described
Blowout prevention pipeline is hard blowout prevention pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710168413.4A CN106968650B (en) | 2017-03-21 | 2017-03-21 | A method of administering surface pipe and gas-bearing formation casing annulus has channeling |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710168413.4A CN106968650B (en) | 2017-03-21 | 2017-03-21 | A method of administering surface pipe and gas-bearing formation casing annulus has channeling |
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| CN106968650A true CN106968650A (en) | 2017-07-21 |
| CN106968650B CN106968650B (en) | 2019-03-15 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110748315A (en) * | 2018-07-23 | 2020-02-04 | 中国石油化工股份有限公司 | Method for treating casing damage of oil-water well |
| CN111997547A (en) * | 2020-08-04 | 2020-11-27 | 中国石油天然气集团有限公司 | Construction method for replacing valve of liquid nitrogen freezing bridge plug under pressure |
| CN112177582A (en) * | 2019-07-01 | 2021-01-05 | 中国石油化工股份有限公司 | Shale gas well staged multi-cluster fracturing method under casing tripping condition |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2509377A (en) * | 2011-04-13 | 2014-07-02 | Ikm Cleandrill As | Subsea wellbore construction method and apparatus |
| CN104405333A (en) * | 2014-10-31 | 2015-03-11 | 中国石油化工集团公司 | Inner tube method well cementation process |
| CN104514513A (en) * | 2013-09-27 | 2015-04-15 | 中国石油化工集团公司 | Cement-free well cementation method for horizontal section of horizontal well |
| CN104963656A (en) * | 2015-04-01 | 2015-10-07 | 中国海洋石油总公司 | Well structure for petroleum and natural gas exploitation and installation method thereof |
-
2017
- 2017-03-21 CN CN201710168413.4A patent/CN106968650B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2509377A (en) * | 2011-04-13 | 2014-07-02 | Ikm Cleandrill As | Subsea wellbore construction method and apparatus |
| CN104514513A (en) * | 2013-09-27 | 2015-04-15 | 中国石油化工集团公司 | Cement-free well cementation method for horizontal section of horizontal well |
| CN104405333A (en) * | 2014-10-31 | 2015-03-11 | 中国石油化工集团公司 | Inner tube method well cementation process |
| CN104963656A (en) * | 2015-04-01 | 2015-10-07 | 中国海洋石油总公司 | Well structure for petroleum and natural gas exploitation and installation method thereof |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110748315A (en) * | 2018-07-23 | 2020-02-04 | 中国石油化工股份有限公司 | Method for treating casing damage of oil-water well |
| CN112177582A (en) * | 2019-07-01 | 2021-01-05 | 中国石油化工股份有限公司 | Shale gas well staged multi-cluster fracturing method under casing tripping condition |
| CN112177582B (en) * | 2019-07-01 | 2022-09-27 | 中国石油化工股份有限公司 | Shale gas well staged multi-cluster fracturing method under casing tripping condition |
| CN111997547A (en) * | 2020-08-04 | 2020-11-27 | 中国石油天然气集团有限公司 | Construction method for replacing valve of liquid nitrogen freezing bridge plug under pressure |
| CN111997547B (en) * | 2020-08-04 | 2022-10-18 | 中国石油天然气集团有限公司 | Construction method for replacing valve of liquid nitrogen freezing bridge plug under pressure |
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| CN106968650B (en) | 2019-03-15 |
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Effective date of registration: 20201028 Address after: 100007 Dongcheng District, Dongzhimen, China, North Street, No. 9 Oil Mansion, No. Patentee after: CHINA NATIONAL PETROLEUM Corp. Patentee after: CNPC Chuanqing Drilling Engineering Co.,Ltd. Address before: 710018 Shaanxi province Xi'an Weiyang Changqing Changqing prosperous Park District Building Room 1207 Patentee before: CHANGQING DOWNHOLE TECHNOLOGY OPERATION COMPANY OF CNPC CHUANQING DRILLING ENGINEERING Co.,Ltd. |