CN110107249B - Oil leakage preventing device of airtight blowout prevention box - Google Patents
Oil leakage preventing device of airtight blowout prevention box Download PDFInfo
- Publication number
- CN110107249B CN110107249B CN201910396499.5A CN201910396499A CN110107249B CN 110107249 B CN110107249 B CN 110107249B CN 201910396499 A CN201910396499 A CN 201910396499A CN 110107249 B CN110107249 B CN 110107249B
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- wire rope
- oil
- box
- packing
- steel wire
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- 230000002265 prevention Effects 0.000 title claims abstract description 36
- 238000012856 packing Methods 0.000 claims abstract description 102
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 49
- 239000010959 steel Substances 0.000 claims abstract description 49
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 30
- 229910052742 iron Inorganic materials 0.000 claims description 15
- 238000003466 welding Methods 0.000 claims description 5
- 230000002146 bilateral effect Effects 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 26
- 238000000034 method Methods 0.000 abstract description 6
- 230000008569 process Effects 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 99
- 238000005086 pumping Methods 0.000 description 10
- 230000000694 effects Effects 0.000 description 9
- 239000012141 concentrate Substances 0.000 description 5
- 238000007790 scraping Methods 0.000 description 4
- 239000010779 crude oil Substances 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000006467 substitution reaction Methods 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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/02—Surface sealing or packing
- E21B33/03—Well heads; Setting-up thereof
- E21B33/068—Well heads; Setting-up thereof having provision for introducing objects or fluids into, or removing objects from, wells
- E21B33/072—Well heads; Setting-up thereof having provision for introducing objects or fluids into, or removing objects from, wells for cable-operated tools
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
Landscapes
- 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)
- Cleaning Or Clearing Of The Surface Of Open Water (AREA)
Abstract
The invention provides an airtight blowout prevention box oil leakage prevention device which comprises an oil collecting box, packing boxes, oil return pipelines, steel wire rope centralizing wheels, centralizing wheel fixing devices and swabbing steel wire ropes, wherein the packing boxes are fixed at the top of the oil collecting box, the bottoms of the oil collecting box are connected with the oil return pipelines through oil return pipeline joints, two steel wire rope centralizing wheels are arranged in the oil collecting box, the two steel wire rope centralizing wheels are symmetrically arranged side by side, a gap is reserved between the two steel wire rope centralizing wheels, the middle parts of the two steel wire rope centralizing wheels are respectively connected with the inner wall of the oil collecting box through central shafts, and centralizing wheel fixing devices are arranged below the gaps between the two steel wire rope centralizing wheels; the swabbing wire rope penetrates through the packing box and extends downwards to a gap between the two wire rope righting wheels. The device can effectively solve the problem that oil and water at the guide wheel falls to the ground in the swabbing operation process, reduces environmental protection risks and meets the requirement of clean production.
Description
Technical Field
The invention belongs to the technical field of oil and gas field development, and particularly relates to an oil leakage prevention device of a closed blowout prevention box, which is used in oil test pumping construction operation.
Background
The blowout prevention box is used as a novel sealing wellhead device and is widely applied to the oilfield operation process, particularly the continuous oil pipe equipment operation. However, when the conventional airtight blowout prevention box is used for pumping operation, the airtight blowout prevention box cannot scrape oil and water on the steel wire rope, splashes at the guide wheel and falls on the ground, so that pollution is caused.
More importantly, in the well testing operation of ultra-deep high-pressure oil-gas wells, the sealing packing rubber ring of the existing blowout prevention box is easy to lose sealing due to the abrasion of steel wires and the high pressure of the oil-gas wells for a long time, and the blowout accident occurs and even causes well control accidents.
Disclosure of Invention
The invention aims to provide the airtight blowout prevention box oil leakage prevention device capable of effectively reducing the environmental protection risk, solves the problems that oil and water on a steel wire rope cannot be scraped off by the airtight blowout prevention box in the swabbing process, so that the oil and water splashes on a guide wheel and falls on the ground to cause pollution, greatly reduces the crude oil pollution risk caused by swabbing, and meets the clean production requirement.
The technical scheme adopted by the invention is as follows:
an airtight blowout prevention box oil leakage prevention device comprises an oil collecting box, a packing box, an oil return pipeline, a steel wire rope righting wheel, a righting wheel fixing device and a swabbing steel wire rope,
the top of the oil collecting box is fixedly provided with a packing box, the bottom of the oil collecting box is connected with an oil return pipeline through an oil return pipeline joint, two steel wire rope centering wheels are arranged in the oil collecting box, the two steel wire rope centering wheels are symmetrically arranged side by side, a gap is reserved between the two steel wire rope centering wheels, the middle parts of the two steel wire rope centering wheels are respectively connected with the inner wall of the oil collecting box through a central shaft, and a centering wheel fixing device is arranged below the gap between the two steel wire rope centering wheels; the swabbing wire rope penetrates through the packing box and extends downwards to a gap between the two wire rope righting wheels.
The packing box comprises a packing box body, a packing box cover is arranged at the top of the packing box body, packing is arranged in the packing box body, the packing is connected with the packing box cover, a packing fixing plate is arranged at the bottom of the packing box body, and the packing box is fixed on the oil collecting box through the packing fixing plate.
The swabbing steel wire rope penetrates into the packing from the upper part of the packing box cover and penetrates through the packing fixing plate to extend downwards to a gap between the two steel wire rope centralizing wheels.
An iron plate is arranged at the top of the oil collecting box, and the packing fixing plate is fixed on the iron plate through bolts.
The packing box body is a hollow cylinder with the inner diameter of 66mm and is connected with the packing box cover through a screw thread.
The oil collecting box is a rectangular iron box formed by welding thin iron plates with the thickness of 3 mm.
The bottom of the oil collecting box is connected with the oil return pipeline joint in a welding mode.
The centering wheel fixing device at least comprises a centering wheel fixing seat, two fixing grooves are formed in the side face of the centering wheel fixing seat, the two fixing grooves are respectively symmetrically arranged with the two steel wire rope centering wheels, the bottom of each steel wire rope centering wheel can be matched with the corresponding fixing groove, nuts are symmetrically arranged in the fixing grooves in a left-right mode, the nuts are fixed in the fixing grooves through connecting rods, a screw rod is further connected to the nuts, one end of the screw rod is in threaded connection with the nuts, the other end of the screw rod penetrates through the fixing grooves and extends out of the fixing grooves, and nuts are arranged at one ends of the screw rods extending out of the fixing grooves.
The symmetry axis of the two steel wire rope righting wheels and the center of the righting wheel fixing device are both positioned on the center line of the packing box.
One end of the oil return pipeline, which is far away from the oil collecting box, is connected with a swabbing tank of the airtight blowout prevention box.
Therefore, the invention has the beneficial effects that:
1. through being equipped with album oil box, packing box and oil return pipeline, can catch the oil that splashes out, water, then concentrate the recovery to can solve righting the problem that oil, water fall to the ground of wheel department well. The device can effectively solve the problem of oil and water landing at the guide wheel, greatly reduce the pollution risk of crude oil caused by swabbing and meet the clean production requirement.
2. The bottom of the oil collecting box is welded with the oil return pipeline joint, so that the oil return pipeline joint is very fixed, and leakage of oil and water caused by disconnection of the oil return pipeline joint and the bottom of the oil collecting box is avoided.
3. Through being equipped with packing box lid, when the round hole at packing center is worn and torn the grow, we can extrude packing rubber through screwing packing box lid, make its deformation press from both sides tight wire rope, reach the effect of scraping oil, change in addition convenient.
4. Through being equipped with packing fixed plate, it not only can play the effect of fixed packing box, can also block the oil, the water that the leading wheel department splashes out, unify concentrate into the collection oil box in, can effectively solve the problem that the leading wheel department oil, water fall to the ground in the pumping operation process.
5. The oil and water collected in the oil collecting box are led into the pumping tank by being connected with the pumping tank, so that the problem of recycling the oil and water of the oil collecting box is effectively solved.
6. Through being equipped with righting wheel fixing device, we can be through manual screw cap for the screw rod rotates, thereby plays fixed spacing effect to the wire rope righting wheel in the fixed slot, can adjust the screw rod again simultaneously, keeps away from the wire rope righting wheel.
Drawings
FIG. 1 is a schematic structural view of an oil leakage prevention device of a closed blowout prevention box;
FIG. 2 is a schematic structural view of a packing box;
FIG. 3 is a schematic view of the internal structure of the packing box;
fig. 4 is a schematic structural view of the centralizer wheel fixture.
Reference numerals illustrate:
1. an oil collecting box; 2. a packing box; 3. an oil return line; 4. a righting wheel fixing device; 5. a wire rope righting wheel; 6. an iron plate; 7. an oil return line connection; 8. a central shaft; 9. swabbing the steel wire rope; 10. a pumping tank;
2.1, packing box body; 2.2, packing box cover; 2.3, packing; 2.4, packing fixing plates; 2.5 bolts;
5.1, fixing the righting wheel; 5.2, a fixing groove; 5.3, nuts; 5.4, connecting rod; 5.5, a screw rod; and 5.6, a nut.
Detailed Description
The following detailed description of specific embodiments of the invention will be presented in conjunction with the drawings.
Example 1
As shown in fig. 1, the oil leakage preventing device of the airtight blowout prevention box comprises an oil collecting box 1, a packing box 2, an oil return pipeline 3, steel wire rope centralizing wheels 4, centralizing wheel fixing devices 5 and swabbing steel wires 9, wherein the packing box 2 is fixed at the top of the oil collecting box 1, the bottom of the oil collecting box 1 is connected with the oil return pipeline 3 through an oil return pipeline joint 7, two steel wire rope centralizing wheels 4 are arranged in the oil collecting box 1 in number, the two steel wire rope centralizing wheels 4 are symmetrically arranged side by side, a gap is reserved between the two steel wire rope centralizing wheels 4, the middle parts of the two steel wire rope centralizing wheels 4 are respectively connected with the inner wall of the oil collecting box 1 through a central shaft 8, and centralizing wheel fixing devices 5 are arranged below the gap between the two steel wire rope centralizing wheels 4; one end of the swabbing wire rope 9 is connected with the tractor roller, and the other end of the swabbing wire rope 9 penetrates through the packing box 2 and extends downwards to a gap between the two wire rope righting wheels 4.
This leak protection oil device passes through welded mode to be fixed on airtight swabbing prevents spouting the leading wheel splint of box, through being equipped with collection oil box 1, packing box 2 and oil return pipeline 3, can catch the oil, the water that splash out, then concentrate and retrieve to can solve the problem that righting wheel department oil, water fall to the ground well, greatly reduced the crude oil pollution risk that the swabbing brought, reached the clean production requirement.
Example 2
On the basis of embodiment 1, further, the oil collecting box 1 is a rectangular iron box formed by welding thin iron plates with the thickness of 3mm, the size of the rectangular iron box can be 300mm long, 55mm wide and 140mm high, and the bottom of the rectangular iron box is welded with one end of the oil return pipeline joint 7, so that the connection is very fixed, and the oil return pipeline joint is prevented from being disconnected with the bottom of the oil collecting box, so that oil and water can be prevented from leaking.
The oil return pipeline 3 is a two inch PVC pipe, and the oil return pipeline 3 is arranged on an oil return pipeline joint 7 welded at the bottom of the oil collecting box and used for guiding oil and water collected in the oil collecting box into the pumping tank 10.
Example 3
On the basis of embodiment 1, in order to further reduce the oil water brought out by the steel wire rope, a packing box 2 is added on the upper portion of the oil collecting box 1, as shown in fig. 2 and 3, the packing box 2 comprises a packing box body 2.1, a packing box cover 2.2 is arranged at the top of the packing box body 2.1, a packing 2.3 is arranged in the packing box body 2.1, the packing 2.3 is connected with the packing box cover 2.2, a packing fixing plate 2.4 is arranged at the bottom of the packing box body 2.1, and the packing box 2 is fixed on the oil collecting box 1 through the packing fixing plate 2.4. The swabbing steel wire rope 9 penetrates into the packing 2.3 from the upper part of the packing box cover 2.2 and penetrates through the packing fixing plate 2.4 to extend downwards to a gap between the two steel wire rope righting wheels 4.
An iron plate 6 is arranged at the top of the oil collecting box 1, and the packing fixing plate 2.4 is fixed on the iron plate 6 through bolts 2.5. Through setting up of packing fixed plate 2.4, it not only can play the effect of fixed packing box 2, can also stop the oil, the water that the leading wheel department splashes out, unify concentrate into album oil box 1, can effectively solve the problem that the leading wheel department oil, water fall to the ground in the pumping operation process.
Further, the packing box body 2.1 is a hollow cylinder and is connected with the packing box cover 2.2 through screw threads. The packing in the airtight blowout prevention box is very easy to wear, and as a result, a round hole in the center of the packing becomes large, and the oil scraping function is lost. In the packing box designed by us, when the abrasion of the round hole in the center of the packing is increased, the packing rubber can be extruded by screwing the packing box cover 2.2, so that the packing rubber is deformed to clamp the swabbing steel wire rope, the oil scraping effect is achieved, and the packing box is convenient to replace.
Example 4
On the basis of the above embodiment, as shown in fig. 4, the righting wheel fixing device 5 at least includes a righting wheel fixing seat 5.1, two fixing grooves 5.2 are formed in the righting wheel fixing seat 5.1, the two fixing grooves 5.2 are respectively and symmetrically arranged with the two steel wire rope righting wheels 4 one by one, the bottom of each steel wire rope righting wheel 4 can be fit into the corresponding fixing groove 5.2, nuts 5.3 are symmetrically arranged in each fixing groove 5.2 left and right, the nuts 5.3 are fixed in the fixing grooves 5.2 through connecting rods 5.4, screws 5.5 are further connected to the nuts 5.3, one ends of the screws 5.5 are in threaded connection with the nuts 5.3, the other ends of the screws 5.5 penetrate through the fixing grooves 5.2 and extend out of the fixing grooves 5.2, and one ends of the screws 5.5 extending out of the fixing grooves 5.2 are provided with nuts 5.6.
The symmetry axis of the two steel wire rope righting wheels 4 and the center of the righting wheel fixing device 5 are both positioned on the center line of the packing box 2.
Through being equipped with righting wheel fixing device 5, we can be through manual screw cap 5.6 for screw rod 5.5 rotates, thereby play fixed spacing effect to wire rope righting wheel 4 in the fixed slot 5.2, can adjust screw rod 5.5 again simultaneously, keep away from wire rope righting wheel 4.
Example 5
The working principle of the embodiment is as follows: the bottom of the oil collecting box 1 is welded with the oil return pipeline joint 7, so that the connection is very fixed, and the oil return pipeline joint 7 is prevented from being disconnected with the bottom of the oil collecting box 1, so that oil and water are prevented from leaking.
Through being equipped with packing box lid 2.2, when the round hole in packing 2.3 center is worn and torn the grow, we can extrude the packing rubber through screwing packing box lid 2.2, make its deformation press from both sides tight swabbing wire rope 9, reach the effect of scraping oil, change in addition conveniently.
Through being equipped with packing fixed plate 2.4, it not only can play the effect of fixed packing box 2, can also stop the oil, the water that the leading wheel department splashes out, unify concentrate into album oil box 1, can effectively solve the problem that the leading wheel department oil, water fall to the ground in the pumping operation in-process. Thereby leading the oil and water collected in the oil collecting box 1 into the pumping tank 10, and effectively solving the problem of recycling the oil and water in the oil collecting box 1.
Through being equipped with righting wheel fixing device 5, we can be through manual screw cap 5.6 for screw rod 5.5 rotates, thereby play fixed spacing effect to wire rope righting wheel 4 in the fixed slot 5.2, can adjust screw rod 5.5 again simultaneously, keep away from wire rope righting wheel 4.
In summary, by means of the above technical scheme of the present invention, by providing the oil collecting box 1, the packing box 2 and the oil return pipeline 3, splashed oil and water can be received and then recovered in a concentrated manner, so that the problem of oil and water landing at the righting wheel can be well solved. The device provided by the invention has the advantages of reasonable structural design, simplicity in operation, convenience in use and capability of being widely popularized and used.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
The foregoing examples are merely illustrative of the present invention and are not intended to limit the scope of the present invention, and all designs that are the same or similar to the present invention are within the scope of the present invention. Devices and structures not described in detail in the present invention are all prior art, and will not be described in detail.
Claims (8)
1. The utility model provides a airtight blowout prevention box leak protection oil device which characterized in that: the device comprises an oil collecting box (1), a packing box (2), an oil return pipeline (3), a steel wire rope righting wheel (4), a righting wheel fixing device (5) and a swabbing steel wire rope (9),
the oil collecting box is characterized in that a packing box (2) is fixed at the top of the oil collecting box (1), the bottom of the oil collecting box (1) is connected with an oil return pipeline (3) through an oil return pipeline joint (7), two steel wire rope centralizing wheels (4) are arranged in the oil collecting box (1), the two steel wire rope centralizing wheels (4) are symmetrically arranged side by side, a gap is reserved between the two steel wire rope centralizing wheels (4), the middle parts of the two steel wire rope centralizing wheels (4) are respectively connected with the inner wall of the oil collecting box (1) through a central shaft (8), and a centralizing wheel fixing device (5) is arranged below the gap between the two steel wire rope centralizing wheels (4); the swabbing steel wire rope (9) penetrates through the packing box (2) and extends downwards to a gap between the two steel wire rope righting wheels (4);
the packing box (2) comprises a packing box body (2.1), a packing box cover (2.2) is arranged at the top of the packing box body (2.1), packing (2.3) is arranged in the packing box body (2.1), the packing (2.3) is connected with the packing box cover (2.2), a packing fixing plate (2.4) is arranged at the bottom of the packing box body (2.1), and the packing box (2) is fixed on the oil collecting box (1) through the packing fixing plate (2.4);
the packing box body (2.1) is a hollow cylinder and is connected with the packing box cover (2.2) through screw threads.
2. The sealed blowout prevention box oil leakage prevention device according to claim 1, wherein: the swabbing steel wire rope (9) penetrates into the packing (2.3) from the upper part of the packing box cover (2.2) and downwards extends to a gap between the two steel wire rope righting wheels (4) through the packing fixing plate (2.4).
3. The sealed blowout prevention box oil leakage prevention device according to claim 1, wherein: an iron plate (6) is arranged at the top of the oil collecting box (1), and the packing fixing plate (2.4) is fixed on the iron plate (6) through bolts (2.5).
4. The sealed blowout prevention box oil leakage prevention device according to claim 1, wherein: the oil collecting box (1) is a rectangular iron box formed by welding thin iron plates with the thickness of 3 mm.
5. The sealed blowout prevention box oil leakage prevention device according to claim 1, wherein: the bottom of the oil collecting box (1) is connected with the oil return pipeline joint (7) in a welding mode.
6. The sealed blowout prevention box oil leakage prevention device according to claim 1, wherein: the utility model provides a right wheel fixing device (5) is including right wheel fixing base (5.1) at least, two fixed slots (5.2) have been seted up to right wheel fixing base (5.1) side, two fixed slots (5.2) respectively with two wire rope right wheel (4) one-to-one sets up, and the bottom of every wire rope right wheel (4) can agree with in fixed slot (5.2) corresponding with it, bilateral symmetry is equipped with nut (5.3) in every fixed slot (5.2), nut (5.3) are fixed in fixed slot (5.2) through connecting rod (5.4), still be connected with screw rod (5.5) on nut (5.3), the one end and the nut (5.3) threaded connection of screw rod (5.5), the other end of screw rod (5.5) run through in fixed slot (5.2) and extend to outside fixed slot (5.2), screw rod (5.5) extend to outside fixed slot (5.2) one end is equipped with nut (6.5).
7. The sealed blowout prevention box oil leakage prevention device according to claim 1, wherein: the symmetry axis of the two steel wire rope righting wheels (4) and the center of the righting wheel fixing device (5) are both positioned on the center line of the packing box (2).
8. The sealed blowout prevention box oil leakage prevention device according to claim 1, wherein: one end of the oil return pipeline (3) far away from the oil collecting box (1) is connected with a swabbing tank (10) of the airtight blowout prevention box.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910396499.5A CN110107249B (en) | 2019-05-14 | 2019-05-14 | Oil leakage preventing device of airtight blowout prevention box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910396499.5A CN110107249B (en) | 2019-05-14 | 2019-05-14 | Oil leakage preventing device of airtight blowout prevention box |
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| Publication Number | Publication Date |
|---|---|
| CN110107249A CN110107249A (en) | 2019-08-09 |
| CN110107249B true CN110107249B (en) | 2023-11-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910396499.5A Active CN110107249B (en) | 2019-05-14 | 2019-05-14 | Oil leakage preventing device of airtight blowout prevention box |
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| CN (1) | CN110107249B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111335829B (en) * | 2020-03-05 | 2021-07-27 | 西安创新能源工程有限公司 | On-spot environment-friendly device of pumping operation |
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| CN210598902U (en) * | 2019-05-14 | 2020-05-22 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Oil leakage prevention device of closed blowout prevention box |
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| RU50590U1 (en) * | 2005-08-08 | 2006-01-20 | Общество с ограниченной ответственностью производственно-коммерческая фирма "ТехноВек" | ANTI-EMISSION ORIENTAL OIL SEAL |
| CN201802340U (en) * | 2010-05-27 | 2011-04-20 | 中国石油天然气股份有限公司 | Packing oil guider at opening of rod-pumped well |
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| Publication number | Publication date |
|---|---|
| CN110107249A (en) | 2019-08-09 |
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Effective date of registration: 20201029 Address after: 100007 Dongcheng District, Dongzhimen, China, North Street, No. 9 Oil Mansion, No. Applicant after: CHINA NATIONAL PETROLEUM Corp. Applicant after: CNPC CHUANQING DRILLING ENGINEERING Co.,Ltd. Address before: 710018 Shaanxi province Xi'an Weiyang Changqing Changqing prosperous Park District Building Room 1203 Applicant before: CNPC CHUANQING DRILLING ENGINEERING Co.,Ltd. |
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