CN110454109A - Blowout prevention hose hanging apparatus and hanging method in a kind of well control - Google Patents
Blowout prevention hose hanging apparatus and hanging method in a kind of well control Download PDFInfo
- Publication number
- CN110454109A CN110454109A CN201910741617.1A CN201910741617A CN110454109A CN 110454109 A CN110454109 A CN 110454109A CN 201910741617 A CN201910741617 A CN 201910741617A CN 110454109 A CN110454109 A CN 110454109A
- Authority
- CN
- China
- Prior art keywords
- blowout prevention
- support rod
- prevention hose
- hose
- well control
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
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
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/20—Flexible or articulated drilling pipes, e.g. flexible or articulated rods, pipes or cables
-
- 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
- E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
- E21B19/02—Rod or cable suspensions
-
- 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
- E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
- E21B19/08—Apparatus for feeding the rods or cables; Apparatus for increasing or decreasing the pressure on the drilling tool; Apparatus for counterbalancing the weight of the rods
- E21B19/084—Apparatus for feeding the rods or cables; Apparatus for increasing or decreasing the pressure on the drilling tool; Apparatus for counterbalancing the weight of the rods with flexible drawing means, e.g. cables
-
- 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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/02—Surface sealing or packing
- E21B33/03—Well heads; Setting-up thereof
- E21B33/06—Blow-out preventers, i.e. apparatus closing around a drill pipe, e.g. annular blow-out preventers
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (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)
- Mechanical Engineering (AREA)
- Load-Engaging Elements For Cranes (AREA)
Abstract
The present invention proposes blowout prevention hose hanging apparatus in a kind of well control, including support rod, the length of support rod is greater than the length of blowout prevention hose, the both ends of support rod are connected separately with hoisting ring, the both ends of support rod are additionally provided with path head, the diameter of path head is greater than the diameter of support rod, less than the internal diameter of blowout prevention hose.The present invention also proposes blowout prevention hose hanging method in a kind of well control, include: S001: assembling support rod and hoisting ring, one end of support rod is protruded into the blowout prevention hose, is respectively positioned on the hoisting ring at its support rod both ends outside the port of the high pressure flange at blowout prevention hose both ends；S002: being each passed through two hoisting rings for two groups of lifting ropes, and sling support rod and blowout prevention hose by two groups of lifting ropes by crane, keeps support rod holding horizontal.
Description
Technical field
The invention belongs to drilling engineering field of mechanical technique, and in particular in a kind of well control blowout prevention hose hanging apparatus and
Hanging method.
Background technique
Blowout prevention hose is a kind of high pressure resistant hose in well control, and inside is steel wire winding rubber hose, and outside is stainless steel steel
The protective case of silk braiding, both ends are high pressure flange, and entire length about 4-6m, internal diameter is 80mm or so, weighs about 1 ton, pressure-bearing 15
Megapascal.The hose is connect by high pressure flange with blowout preventer and throttle well killing manifold, when there is well control problem, high pressure gas in well
Body, liquid will carry out pressure control throttling or open flow by the pipeline, for ensureing that drilling well control is particularly significant safely.Due to this
Hose has certain flexibility, and there is high pressure flange at both ends, does not have suitable suspender to be hung in the daily disassembly installation of drilling well
Dress, drilling team generally uses wirerope or strap directly to lift, if entangling hose on the outside using wirerope or strap, certainly due to hose
Weight is larger, and blowout prevention hose in well control is often strangled compressive strain, and the protective case for causing it external is damaged, and reduces its pressure-bearing
Intensity lifts if wirerope or strap passed through in the middle part of hose, due to the often rock of residual packing in single hose
The cement that bits and well cementation are retained, causes wirerope or strap to be difficult to pass through from hose, even if having passed through hose, when lifting in the sky
Due to often will appear an a head taller low situation, causes landwaste and cement in hose to spill, be easy to cause unsafe accident.
Summary of the invention
In consideration of it, it is an object of the invention to overcome the above problem or at least be partially solved or alleviate the above problem.
The present invention proposes blowout prevention hose hanging apparatus in a kind of well control, for lifting blowout prevention hose, the blowout prevention hose
Both ends are respectively arranged with high pressure flange, and blowout prevention hose hanging apparatus includes support rod in well control of the invention, the support rod
Length is greater than the length of the blowout prevention hose, and the both ends of the support rod are connected separately with hoisting ring, the both ends of the support rod
It is additionally provided with path head, the diameter of the path head is greater than the diameter of the support rod, less than the internal diameter of the blowout prevention hose.
Blowout prevention hose hanging apparatus also has the feature that in well control of the invention
Preferably, the distance between two described path heads are greater than the entire length of the blowout prevention hose.
Preferably, the both ends of the support rod are respectively arranged with screw hole, and screw rod, the screw rod are provided on the hoisting ring
It is screwed into the screw hole.
Preferably, the axle center of the path head is provided with through-hole, and the screw rod passes through the through-hole and is screwed into the screw hole.
Preferably, the both ends of the support rod are provided with spline, and the both ends of the path head are provided with spline, the flower
Key is matched with the spline.
Preferably, the both ends of the support rod are provided with external screw thread, and the side of the hoisting ring is fixedly connected with path head,
One end of the path head is provided with screw hole, and is threadedly coupled by screw hole with the both ends of the support rod.
Preferably, rubber layer is enclosed on the outside of the path head.
The present invention also proposes blowout prevention hose hanging method in a kind of well control, blowout prevention hose in well control described in any of the above item
Hanging apparatus, comprising the following steps: S001: support rod and hoisting ring are assembled；S002: one end of support rod is protruded into described anti-
It sprays in hose, latus rectum and removal of impurities is carried out to blowout prevention hose 1；S003: the hoisting ring at its support rod both ends is made to be respectively positioned on blowout prevention hose
Outside the port of the high pressure flange at both ends, two groups of lifting ropes are each passed through two hoisting rings, and by crane by the another of two groups of lifting ropes
One end is sling, and support rod is made to keep horizontality.
Blowout prevention hose lifting device can carry out latus rectum to blowout prevention hose and remove sundries in well control of the invention, be easy to run through
Blowout prevention hose both ends can finally cooperate two groups of lifting ropes and crane to carry out handling, and structure is simple, easy to use, and handling labour is strong
Low, safe operation is spent, blowout prevention hose will not be caused to damage.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of existing blowout prevention hose；
Fig. 2 is the structural schematic diagram of blowout prevention hose hanging apparatus in well control of the invention；
Fig. 3 is a kind of end construction schematic diagram of embodiment of the support rod in Fig. 2；
Fig. 4 is a kind of end construction schematic diagram of embodiment of the path head in Fig. 2；
Fig. 5 is a kind of overall structure diagram of embodiment of the hoisting ring in Fig. 2.
In the above figure: 1 blowout prevention hose；2 high pressure flanges；3 support rods；301 screw holes；302 splines；4 hoisting rings；
401 screw rods；5 path heads；501 through-holes；502 splines.
The present invention is described in further details below with reference to embodiment.
Specific embodiment
Embodiment 1
With reference to Fig. 1 and Fig. 2, the embodiment of the present invention proposes blowout prevention hose hanging apparatus in a kind of well control, soft for lifting blowout prevention
Pipe 1, the both ends of blowout prevention hose 1 are respectively arranged with high pressure flange 2, and blowout prevention hose hanging apparatus includes support in well control of the invention
Bar 3, the length of support rod 3 are greater than the length of blowout prevention hose 1, and the both ends of support rod 3 are connected separately with hoisting ring 4, support rod 3
Both ends are additionally provided with path head 5, and the diameter of path head 5 is greater than the diameter of support rod 3, less than the internal diameter of blowout prevention hose 1.
Since the pipe shaft of blowout prevention hose 1 has flexibility, both ends connect high pressure flange 2, whole generally to weigh one ton, and
And length is 4-6m, internal diameter is 80mm or so, protrudes into one end of support rod 3 in blowout prevention hose 1 after removing, and is supporting setting
The path head 5 of 3 one end of bar by blowout prevention hose 1 landwaste and the sundries such as cement block release, finally make the lifting at 3 both ends of support rod
Ring 4 is located at the outer end of the high pressure flange 2 at 1 both ends of blowout prevention hose, and being each passed through by two groups of lifting ropes will after two hoisting rings 4
Support rod 3 and 1 level of blowout prevention hose covered outside support rod 3 are sling and are carried, and undertake support rod 3 uniformly in horizontality
The gravity of blowout prevention hose 1 and high pressure flange 2 thus will not damage blowout prevention hose 1 in lifting handling process.
Embodiment 2
On the basis of embodiment 1, with reference to Fig. 1 and Fig. 2, the entirety that the distance between two path heads 5 are greater than blowout prevention hose 1 is long
Degree.
When the distance between two path heads 5 are greater than the entire length of blowout prevention hose 1, two path heads 5 can all be located at anti-
The outside of the high pressure flange 2 at 1 both ends of hose is sprayed, the inner face of two path heads 5 can be to the high-pressure process at the both ends of blowout prevention hose 1
Orchid 2 plays position-limiting action, prevents 1 sideslip of blowout prevention hose in hoisting process.High pressure flange is the prior art, is not just done here in detail
It describes in detail bright.
Embodiment 3
On the basis of embodiment 2, with reference to Fig. 3 and Fig. 5, the both ends of support rod 3 are respectively arranged with screw hole 301, set on hoisting ring 4
It is equipped with screw rod 401, screw rod 401 is screwed into screw hole 301.
Screw hole 301 is opened up respectively at the both ends of support rod 3, welds screw rod 401 in the side of hoisting ring 4, two are lifted
Screw rod 401 on ring 4, which is screwed into respectively in the screw hole 301 at the both ends of support rod 3, can be completed connection.
Embodiment 4
On the basis of embodiment 3, referring to figs. 2 to Fig. 5, the axle center of path head 5 is provided with through-hole 501, and screw rod 401 passes through through-hole
501 are screwed into screw hole 301.
It is screwed into the spiral shell at 3 both ends of support rod again after the screw rod 401 on hoisting ring 4 to be initially passed through to the through-hole 501 on path head 5
In hole 301, path head 5 can be fixed on to the both ends of support rod 3 in this way.
Embodiment 5
On the basis of embodiment 4, with reference to Fig. 3 and Fig. 4, the both ends of support rod 3 are provided with spline 302, and the both ends of path head 5 are set
It is equipped with spline 502, spline 302 is matched with spline 502.
In order to avoid path head 5 rotates with respect to support rod 3 and hoisting ring 4, spline is set in one end of path head 5
502, spline 302 is respectively set at the both ends of support rod 3, before hoisting ring 4 is connected to the both ends of support rod 3, first by latus rectum
First 5 are respectively inserted in the both ends of support rod 3, match spline 502 with spline 302, and such through-hole 501 is opposite with screw hole 301
Together, then after the screw rod 401 on hoisting ring 4 is passed through through-hole 501 it is screwed into screw hole 301, such path head 5 would not opposite support
Bar 3 and hoisting ring 4 rotate.
Embodiment 6
On the basis of embodiment 2, the both ends of support rod 3 are provided with external screw thread, the side of hoisting ring 4 and the fixed company of path head 5
It connects, one end of path head 5 is provided with screw hole, and is threadedly coupled by screw hole with the both ends of support rod 3.
Hoisting ring 4 is welded to connect in one end of path head 5, and the other end of path head 5 is provided with screw hole, and the two of support rod 3
External screw thread is respectively set in end, and matches with the screw hole on path head 5, will when needing to carry out blowout prevention hose 1 latus rectum and lifting
Path head 5 is threaded in the both ends of support rod 3.
Embodiment 7
On the basis of any of the above item embodiment, the outside of path head 4 is enclosed with rubber layer.
Blowout prevention hose 1 generally bears the pressure of 15MPa in a state of use, and inner wall needs to keep integrality, in order to keep away
Exempt to carry out blowout prevention hose 1 inner wall that can hurt blowout prevention hose 1 when latus rectum removal of impurities using support rod 3 and path head 5, it should be in latus rectum
One layer of rubber layer is wrapped up in first 5 outer surface, will not thus scratch blowout prevention hose 1.
Embodiment 8
Referring to figs. 1 to Fig. 5, the embodiment of the present invention also proposes blowout prevention hose hanging method in a kind of well control, using any of the above
Blowout prevention hose hanging apparatus in well control in item embodiment, comprising the following steps: S001: assemble support rod 3 and hoisting ring 4；
S002: one end of support rod 3 is protruded into the blowout prevention hose 1, carries out latus rectum and removal of impurities to blowout prevention hose 1；S003: make its branch
The hoisting ring 4 at 3 both ends of strut is respectively positioned on outside the port of the high pressure flange 2 at 1 both ends of blowout prevention hose, and two groups of lifting ropes are each passed through two
A hoisting ring 4, and sling the other end of two groups of lifting ropes by crane, so that support rod 3 is kept horizontality.
In S001, guarantees that the length of support rod 3 is greater than the length of blowout prevention hose 1, pass through spline at the both ends of support rod 3
302 and spline 502 and 5 grafting of path head after, twisted after the screw rod 401 on hoisting ring 4 is passed through the through-hole 501 on path head 5
In the screw hole 301 for entering 3 both ends of support rod；In S002, the path head 5 of 3 one end of support rod is protruded into from the port of high pressure flange 2
In blowout prevention hose 1, the landwaste and cement block that retain in blowout prevention hose 1 are released；In S003, make the logical of the both ends of support rod 3
Diameter head 5 is respectively positioned on 2 outside of high pressure flange at the both ends of blowout prevention hose 1, and the identical lifting rope of two groups of length is then each passed through two
A hoisting ring 4, then sling the other end of two groups of lifting ropes with crane, make to cover the blowout prevention hose 1 on support rod 3 with support rod 3
Horizontality is kept, in this way, it is uniform by the support force of support rod 3 on blowout prevention hose 1, blowout prevention hose 1 will not be caused to damage.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
In the technical scope disclosed by the present invention, any changes or substitutions that can be easily thought of by anyone skilled in the art,
It should be covered by the protection scope of the present invention.Therefore, protection scope of the present invention should be with scope of protection of the claims
Subject to.The well-known components and common structure or conventional means of component and the structure category industry that the present embodiment does not describe in detail,
Here it does not describe one by one.
Claims (8)
1. blowout prevention hose hanging apparatus in a kind of well control, for lifting blowout prevention hose (1), the both ends point of the blowout prevention hose (1)
It is not provided with high pressure flange (2), which is characterized in that including support rod (3), the length of the support rod (3) is greater than the blowout prevention
The both ends of the length of hose (1), the support rod (3) are connected separately with hoisting ring (4), and the both ends of the support rod (3) are also set
It is equipped with path head (5), the diameter of the path head (5) is greater than the diameter of the support rod (3), is less than the blowout prevention hose (1)
Internal diameter.
2. blowout prevention hose hanging apparatus in well control according to claim 1, which is characterized in that two path heads (5)
The distance between be greater than the blowout prevention hose (1) entire length.
3. blowout prevention hose hanging apparatus in well control according to claim 2, which is characterized in that the two of the support rod (3)
End is respectively arranged with screw hole (301), is provided with screw rod (401) on the hoisting ring (4), the screw rod (401) is screwed into the spiral shell
In hole (301).
4. blowout prevention hose hanging apparatus in well control according to claim 3, which is characterized in that the axis of the path head (5)
The heart is provided with through-hole (501), and the screw rod (401) passes through the through-hole (501) and is screwed into the screw hole (301).
5. blowout prevention hose hanging apparatus in well control according to claim 4, which is characterized in that the two of the support rod (3)
End is provided with spline (302), and the both ends of the path head (5) are provided with spline (502), the spline (302) and the flower
Keyway (502) matches.
6. blowout prevention hose hanging apparatus in well control according to claim 2, which is characterized in that the two of the support rod (3)
End is provided with external screw thread, and the side of the hoisting ring (4) is fixedly connected with the path head (5), one end of the path head (5)
It is provided with screw hole, and is threadedly coupled by screw hole with the both ends of the support rod (3).
7. blowout prevention hose hanging apparatus in well control according to any one of claim 1 to 6, which is characterized in that described logical
Diameter head is enclosed with rubber layer on the outside of (4).
8. blowout prevention hose hanging method in a kind of well control, using blowout prevention hose in well control described in any one of claims 1 to 7
Hanging apparatus, which comprises the following steps: S001: support rod and hoisting ring are assembled；S002: by the one of support rod
End is protruded into the blowout prevention hose, carries out latus rectum and removal of impurities to blowout prevention hose 1；S003: keep the hoisting ring at its support rod both ends equal
Outside the port of the high pressure flange at blowout prevention hose both ends, two groups of lifting ropes are each passed through two hoisting rings, and will by crane
The other end of two groups of lifting ropes is sling, and support rod is made to keep horizontality.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910741617.1A CN110454109A (en) | 2019-08-12 | 2019-08-12 | Blowout prevention hose hanging apparatus and hanging method in a kind of well control |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910741617.1A CN110454109A (en) | 2019-08-12 | 2019-08-12 | Blowout prevention hose hanging apparatus and hanging method in a kind of well control |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110454109A true CN110454109A (en) | 2019-11-15 |
Family
ID=68486032
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910741617.1A Pending CN110454109A (en) | 2019-08-12 | 2019-08-12 | Blowout prevention hose hanging apparatus and hanging method in a kind of well control |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110454109A (en) |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB880699A (en) * | 1958-04-16 | 1961-10-25 | Maurice Northrop Quade | A derrick for supporting, manipulating and handling a flexible conduit assembly |
| JPH02286593A (en) * | 1989-04-26 | 1990-11-26 | Sanwa Tekki Corp | Hanging hook of steel pipe for steel tower |
| US20050104394A1 (en) * | 2003-01-24 | 2005-05-19 | Cortez Rick D. | Pipe-handling tool |
| CN201999621U (en) * | 2010-11-22 | 2011-10-05 | 中国十七冶集团有限公司 | Tape elevating protective device for bucket elevator |
| CN204312004U (en) * | 2014-11-14 | 2015-05-06 | 中国石油天然气股份有限公司 | Novel gas well drift size gauge tool |
| CN204627551U (en) * | 2015-05-20 | 2015-09-09 | 大连船舶重工集团有限公司 | Offshore petroleum drilling function flexible pipe connects and emergency release |
| CN105502144A (en) * | 2014-09-24 | 2016-04-20 | 天津市海王星海上工程技术股份有限公司 | Marine soft pipe placing lifting frame and implementation method thereof |
| CN105836604A (en) * | 2016-06-02 | 2016-08-10 | 成都大漠石油技术有限公司 | Oil conveying pipeline carrying device |
| CN206232304U (en) * | 2016-10-13 | 2017-06-09 | 招商局重工（江苏）有限公司 | A kind of drilling platforms blowout preventer hydraulic controls flexible pipe hoisting fixture |
| CN206267827U (en) * | 2016-11-24 | 2017-06-20 | 辽河石油勘探局 | A kind of workover treatment wellbore treatments instrument |
| CN110043712A (en) * | 2019-05-15 | 2019-07-23 | 江苏爱索新材料科技有限公司 | A kind of vertical the water intaking flexible pipe of deep well is laid with and maintenance construction equipment |
| CN210598899U (en) * | 2019-08-12 | 2020-05-22 | 中国石油集团川庆钻探工程有限公司长庆钻井总公司 | Blowout prevention hose hoisting device in well control |
-
2019
- 2019-08-12 CN CN201910741617.1A patent/CN110454109A/en active Pending
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB880699A (en) * | 1958-04-16 | 1961-10-25 | Maurice Northrop Quade | A derrick for supporting, manipulating and handling a flexible conduit assembly |
| JPH02286593A (en) * | 1989-04-26 | 1990-11-26 | Sanwa Tekki Corp | Hanging hook of steel pipe for steel tower |
| US20050104394A1 (en) * | 2003-01-24 | 2005-05-19 | Cortez Rick D. | Pipe-handling tool |
| CN201999621U (en) * | 2010-11-22 | 2011-10-05 | 中国十七冶集团有限公司 | Tape elevating protective device for bucket elevator |
| CN105502144A (en) * | 2014-09-24 | 2016-04-20 | 天津市海王星海上工程技术股份有限公司 | Marine soft pipe placing lifting frame and implementation method thereof |
| CN204312004U (en) * | 2014-11-14 | 2015-05-06 | 中国石油天然气股份有限公司 | Novel gas well drift size gauge tool |
| CN204627551U (en) * | 2015-05-20 | 2015-09-09 | 大连船舶重工集团有限公司 | Offshore petroleum drilling function flexible pipe connects and emergency release |
| CN105836604A (en) * | 2016-06-02 | 2016-08-10 | 成都大漠石油技术有限公司 | Oil conveying pipeline carrying device |
| CN206232304U (en) * | 2016-10-13 | 2017-06-09 | 招商局重工（江苏）有限公司 | A kind of drilling platforms blowout preventer hydraulic controls flexible pipe hoisting fixture |
| CN206267827U (en) * | 2016-11-24 | 2017-06-20 | 辽河石油勘探局 | A kind of workover treatment wellbore treatments instrument |
| CN110043712A (en) * | 2019-05-15 | 2019-07-23 | 江苏爱索新材料科技有限公司 | A kind of vertical the water intaking flexible pipe of deep well is laid with and maintenance construction equipment |
| CN210598899U (en) * | 2019-08-12 | 2020-05-22 | 中国石油集团川庆钻探工程有限公司长庆钻井总公司 | Blowout prevention hose hoisting device in well control |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20211018 Address after: 100007 Oil Mansion, 9 North Avenue, Dongcheng District, Beijing, Dongzhimen Applicant after: CHINA NATIONAL PETROLEUM Corp. Applicant after: CNPC CHUANQING DRILLING ENGINEERING Co.,Ltd. Address before: Room 1902, Changqing building, 151 Weiyang Road, Xi'an, Shaanxi 710018 Applicant before: CNPC CHUANQING DRILLING ENGINEERING CO., LTD. CHANGQING WELL DRILLING GENERAL Co. |
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| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20191115 |