CN104481464A - Nonmetal flexible composite coiled tubing oil production device - Google Patents
Nonmetal flexible composite coiled tubing oil production device Download PDFInfo
- Publication number
- CN104481464A CN104481464A CN201410726144.5A CN201410726144A CN104481464A CN 104481464 A CN104481464 A CN 104481464A CN 201410726144 A CN201410726144 A CN 201410726144A CN 104481464 A CN104481464 A CN 104481464A
- Authority
- CN
- China
- Prior art keywords
- oil
- extracting device
- flexible compound
- nonmetal flexible
- well
- 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.)
- Granted
Links
- 229910052755 nonmetal Inorganic materials 0.000 title claims abstract description 62
- 238000004519 manufacturing process Methods 0.000 title abstract description 9
- 239000002131 composite material Substances 0.000 title abstract description 7
- 239000002905 metal composite material Substances 0.000 claims abstract description 37
- 239000003129 oil well Substances 0.000 claims abstract description 14
- 150000001875 compounds Chemical class 0.000 claims description 27
- 239000000463 material Substances 0.000 claims description 14
- 238000005987 sulfurization reaction Methods 0.000 claims description 8
- 229920000573 polyethylene Polymers 0.000 claims description 5
- 239000004698 Polyethylene Substances 0.000 claims description 4
- 239000004699 Ultra-high molecular weight polyethylene Substances 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 4
- 229920000785 ultra high molecular weight polyethylene Polymers 0.000 claims description 4
- 239000003365 glass fiber Substances 0.000 claims description 3
- -1 polyethylene Polymers 0.000 claims description 3
- 238000010276 construction Methods 0.000 abstract description 11
- 239000002184 metal Substances 0.000 abstract description 11
- 238000005260 corrosion Methods 0.000 abstract description 6
- 238000000605 extraction Methods 0.000 abstract description 3
- 238000006243 chemical reaction Methods 0.000 abstract 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 5
- 230000008901 benefit Effects 0.000 description 5
- 230000007797 corrosion Effects 0.000 description 5
- 239000007788 liquid Substances 0.000 description 5
- 229920002521 macromolecule Polymers 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 239000004677 Nylon Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 229920001778 nylon Polymers 0.000 description 4
- 230000002421 anti-septic effect Effects 0.000 description 3
- 208000001613 Gambling Diseases 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 150000002843 nonmetals Chemical class 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000004073 vulcanization Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009954 braiding Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 229920003020 cross-linked polyethylene Polymers 0.000 description 1
- 239000004703 cross-linked polyethylene Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 239000003209 petroleum derivative Substances 0.000 description 1
- 239000000088 plastic resin Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 238000004804 winding 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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
-
- 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
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)
- Rigid Pipes And Flexible Pipes (AREA)
Abstract
The invention belongs to the technical field of mechanical oil extraction, and particularly provides a nonmetal flexible composite continuous pipe oil extraction device which comprises a wellhead hanger, and a conversion joint, an oil well pump, a sieve pipe and a plug which are sequentially connected from top to bottom, wherein the oil well pump is connected with the wellhead hanger through a sucker rod, a nonmetal composite pipe is connected between the wellhead hanger and the conversion joint, and the sucker rod penetrates through the inside of the nonmetal composite pipe. The invention replaces the original metal oil pipe with the non-metal composite pipe, greatly reduces the construction workload, reduces the labor intensity of constructors, improves the anti-corrosion capability of the pipe column, prolongs the normal production time and simplifies the structure of the production pipe column.
Description
Technical field
The invention belongs to technical field of mechanical oil extraction, be specifically related to a kind of nonmetal flexible compound continuous-tube extracting device of oil.
Background technology
At present, having in bar extracting device of oil of oil field needs by metal oil conduit as passage, Liquid transfer to ground, needs single connection during metal oil conduit operation, and construction operation amount is comparatively large, and personnel's operation intensity is large, and construction period is longer; Metal oil conduit is vulnerable to the corrosiveness of down-hole liquid when underground work simultaneously, and therefore service time can shorten.
Non-metal composite pipe, at present in oil field gathering and transportation pipeline, filling pipe and natural gas line extensive use, maximum advantage is that operating speed is fast, easy construction, and corrosion-resistant, can effectively reduce costs.But in some flexible composite pipe patents of invention of domestic current announcement, mainly concentrate on surface gathering and transferring, relate to the less of oil well application.
As Chinese patent CN202176838U discloses a kind of petroleum gas industrial nonmetal flexible composite high pressure conveyer pipe, comprise nylon core, nylon core outer wall is coated with steel wire winding enhancement layer and overcoat, is provided with to fold steel plate by pros-and-cons type and be engaged the telescoping tube rolled in described nylon core.This nonmetal flexible composite high pressure conveyer pipe is used for surface gathering and transferring, and its internal pressure resistance ability is better, but can not bear excessive pulling force, cannot use in down-hole.
Chinese patent CN102889437A discloses a kind of flexible compound oil pipe, comprise tube layer in the macromolecule for pumped (conveying) medium, be arranged at the macromolecule external tube layer in described macromolecule outside tube layer, to be arranged in described macromolecule for resisting the resistance to compression layer of interior pressure on tube layer outer wall, and for resisting the tensile layer of external tensile force on the inwall being arranged at described macromolecule external tube layer.This flexible compound oil pipe can be used for down-hole, and this flexible compound oil pipe can Continuous maching, its length by processing restriction, does not avoid interconnective operation between many flexible compound oil pipe, but and its range of application undeclared and use ability, conventional pumping unit produce can not normally use.
Chinese patent CN202531035U discloses a kind of flexible compound oil pipe water injection string, water injection well equipment is threaded connection this tubing string lifting sub, lifting sub lower end is threaded connection crossover sub, upper crossover sub lower end is connected flexible compound oil pipe by anti-decylization with outer locking device, crossover sub under flexible compound oil pipe lower end is connected with outer locking device by anti-decylization, lower crossover sub lower end is threaded and adds oil pipe, adds oil pipe lower end and connects tiltedly point.The flexible compound oil pipe of this tubing string has stronger antiseptic property, can solve the problem of reinjection well metal oil conduit corrosion preferably, extends tubing string application life, but does not relate to oil well production string.
Summary of the invention
The object of the invention is to overcome metal tube in existing extracting device of oil perishable, and need single connection, the problem that construction operation amount is large, labour intensity is large.
For this reason, the invention provides a kind of nonmetal flexible compound continuous-tube extracting device of oil, comprise well mouth hanger, and the crossover sub from top to bottom connected successively, oil well pump, screen casing and plug, described oil well pump is connected with well mouth hanger by sucker rod, described mouth hanger is connected non-metal composite pipe with between crossover sub, and described sucker rod is inner through non-metal composite pipe.
Above-mentioned well mouth hanger upper design has the sealing block matched with well head electric pump.
Linked together by sulfuration processing mode between above-mentioned well mouth hanger and non-metal composite pipe, its bonding strength is the weight that non-metal composite pipe and well tool equipment hang into well.
Above-mentioned non-metal composite pipe by topping, enhancement Layer, tensile layer, wire rope form; Described topping, enhancement Layer and tensile layer set gradually from outside to inside, and wire rope is distributed in enhancement Layer outer periphery.
Above-mentioned topping material is rubber.
Above-mentioned enhancement Layer material is glass fiber.
Above-mentioned enhancement Layer is the screen net structure of multiply braiding.
Above-mentioned tensile layer is superhigh molecular weight polyethylene material.
The molecular weight of above-mentioned ultra-high molecular weight polyethylene is 3,000,000 ~ 4,000,000.
Above-mentioned wire rope is 6 ~ 8 strands, is evenly distributed on enhancement Layer outer periphery.
Beneficial effect of the present invention:
(1) in the present invention, non-metal composite pipe has the characteristics such as plastic material pliability is good, corrosion resistance is strong, coefficient of thermal conductivity is low, can make up the deficiency of metal coiled tubing, reach most of performance of coiled tubing, expands the scope of application of coiled tubing.
(2) in the present invention, non-metal composite pipe can connect processing and can ensure tension, internal pressure strength requirement, operation can continuously under enter and trip out, can significantly reduce work operations amount and personnel labor intensity.
(3) in the present invention, non-metal composite pipe and metal joint are processed by sulfuration and are connected, and the change for downhole production tubular column structure provides good means, is adapted to the improvement of process.
(4) oil production technology of nonmetal flexible compound continuous-tube extracting device of oil of the present invention and routine work Method compare, have the distinguishing features such as operating cost is low, operating efficiency is high, No leakage, use casing programme scope are wide.
(5) nonmetal flexible compound continuous-tube extracting device of oil of the present invention can be applicable to the measure such as sand surfing, acidifying, the solution gambling construction of oil-water well (diameter, directional well, horizontal well), has good economic benefit and social benefit.
Below with reference to accompanying drawing, the present invention is described in further details.
Accompanying drawing explanation
Fig. 1 is the structural representation of nonmetal flexible compound continuous-tube extracting device of oil of the present invention.
Fig. 2 is the structural representation of non-metal composite pipe in the present invention.
Description of reference numerals: 1, well mouth hanger; 2, non-metal composite pipe; 3, sucker rod; 4, crossover sub; 5, oil well pump; 6, screen casing; 7, plug; 21, topping; 22, enhancement Layer; 23, tensile layer; 24, wire rope.
Detailed description of the invention
Embodiment 1:
Perishable in order to overcome metal tube in existing extracting device of oil, and need single connection, the problem that construction operation amount is large, labour intensity is large, present embodiments provide a kind of nonmetal flexible compound continuous-tube extracting device of oil as shown in Figure 1, comprise well mouth hanger 1, and the crossover sub 4 from top to bottom connected successively, oil well pump 5, screen casing 6 and plug 7, described oil well pump 5 is connected with well mouth hanger 1 by sucker rod 3, described mouth hanger 1 is connected non-metal composite pipe 2 with between crossover sub 4, and described sucker rod 3 is inner through non-metal composite pipe 2.
Well mouth hanger 1 and non-metal composite pipe 2 are processed by vulcanization and are connected, and well mouth hanger 1 and non-metal composite pipe 2 are carried out sulfuration on sulfuration lathe and processes bonding, and sulfuration processing belongs to known technology and is not here described in detail; Crossover sub 4 upper end and non-metal composite pipe 2 are processed by vulcanization and are connected, for connection and the sealing of non-metal composite pipe 2 and reducing short circuit or other instruments; Crossover sub 4 lower end is connected with oil well pump 5 by gas thread, and oil well pump 5 lower end connects screen casing 6 and forms sucker rod pumping system with plug 7.Drive oil well pump 5 to move by sucker rod 3, make the liquid of down-hole be delivered to ground by non-metal composite pipe 2.
Wherein, the well mouth hanger 1 used is metal material, linked together by sulfuration processing mode between described well mouth hanger 1 and non-metal composite pipe 2, its bonding strength is the weight that non-metal composite pipe 2 and well tool equipment hang into well, simultaneously with the safety factor of more than 2 times; Described well mouth hanger 1 upper design has the sealing block matched with well head electric pump, plays the effect of closed oil jacket annular space.
Nonmetal flexible compound continuous-tube extracting device of oil of the present invention uses non-metal composite pipe to replace original metal oil conduit as liquid input channel, operation can continuously under enter and trip out non-metal composite pipe, significantly reduce construction operation amount, reduce constructor's labour intensity, improve the antiseptic power of tubing string, extend the normal production time, simplify flow string structure; In addition, non-metal composite pipe and the sulfuration between well mouth hanger, crossover sub are processed the change be connected for downhole production tubular column structure and are provided good means, are adapted to the improvement of process.
Embodiment 2:
On the basis of embodiment 1, described non-metal composite pipe 2 by topping 21, enhancement Layer 22, tensile layer 23, wire rope 24 forms; Described topping 21, enhancement Layer 22 and tensile layer 23 set gradually from outside to inside, and wire rope 24 is distributed in enhancement Layer 22 outer periphery.
Wherein, described topping 21 material is rubber, is coated on outside enhancement Layer 22 through extruding, and is non-metal composite pipe 2 outermost one deck guard shield, carries out general protection, have good abrasion resistance and corrosion resistance to pipe inside all the components.
Described enhancement Layer 22 material is glass fiber, the screen net structure that enhancement Layer 22 weaves for multiply, has very high hot strength and tear resistance, can increase substantially the internal pressure strength of tube wall, compressive resistance can be adjusted by number of braided strand as required, generally can reach 20Mpa.
And tensile layer 23 is medium transport layer, tensile layer 23 adopts superhigh molecular weight polyethylene material, and the molecular weight of described ultra-high molecular weight polyethylene is 3,000,000 ~ 4,000,000, through extruding one-shot forming continuously.Polyethylene is prevailing plastic resin, but can not high temperature be born, mechanical strength is not enough, and oil recovery non-metal composite pipe 2 needs good heat resistance, anti-wear performance and proof stress performance, therefore, common polythene obviously can not meet, and ultra-high molecular weight polyethylene substantially increases the thermal deformation behavior of crosslinked polyethylene, anti-wear performance and chemical-resistance, heatproof can reach 90 DEG C, when internal diameter is 50mm, tensile strength can reach 15t, elongation at break is 7.6%, and smooth surface, friction factor is little, can corrode by hundreds of chemicals resistance to, common acid, alkali, salt, organic solvent does not all corrode superelevation material.Under natural lighting, its aging life-span is more than 50 years; Do not expand in water, water absorption rate is only 1% of nylon, meets instructions for use.
Described wire rope 24 is 6 ~ 8 strands, is evenly distributed on enhancement Layer 22 outer periphery; Due to this non-metal composite pipe 2 in use vertical tube run, and hung the oil recovery such as pump, bleeder unit, this just requires in use there is certain tensile strength, carry itself, the weight of pumped (conveying) medium and Set under a well; Although the material itself that tensile layer 23, enhancement Layer 22 adopt has tensile property, be also not enough to bear load, and larger deflection can be produced, so 6 strand steel wire ropes 24 will be designed independently bear load around tube wall.
This non-metal composite pipe 2 pairs of down-hole liquids have good antiseptic power, and transporting resistance is little, light by 3/5 compared with the steel pipe of same specification, and lubricity, ant-scaling, abrasion resistance, chemical proofing are all much better than steel material; And, this non-metal composite pipe 2 has good flexibility, can coil and carry out construction operation on cylinder, simultaneously it can long dimensioned, can need processing continuous print tubing string according to well depth, maximum gauge can reach the needs of 50mm, can meet the requirement of 3000m well depth, internal pressure strength reaches 30MPa, and tensile strength reaches 300KN, heatproof 90 DEG C, can ensure underground construction safety preferably.
Non-metal composite pipe of the present invention has the characteristics such as plastic material pliability is good, corrosion resistance is strong, coefficient of thermal conductivity is low, can make up the deficiency of metal coiled tubing, reach most of performance of coiled tubing, expands the scope of application of coiled tubing; In addition, non-metal composite pipe can connect processing and can ensure tension, internal pressure strength requirement.
In sum, the oil production technology of nonmetal flexible compound continuous-tube extracting device of oil of the present invention and routine work Method compare, there are the distinguishing features such as operating cost is low, operating efficiency is high, No leakage, use casing programme scope are wide, and this invention can be applicable to the measure such as sand surfing, acidifying, the solution gambling construction of oil-water well (diameter, directional well, horizontal well), has good economic benefit and social benefit.
More than exemplifying is only illustrate of the present invention, does not form the restriction to protection scope of the present invention, everyly all belongs within protection scope of the present invention with the same or analogous design of the present invention.
Claims (10)
1. a nonmetal flexible compound continuous-tube extracting device of oil, comprise well mouth hanger (1), and the crossover sub from top to bottom connected successively (4), oil well pump (5), screen casing (6) and plug (7), described oil well pump (5) is connected with well mouth hanger (1) by sucker rod (3), it is characterized in that: described mouth hanger (1) is connected non-metal composite pipe (2) with between crossover sub (4), described sucker rod (3) is inner through non-metal composite pipe (2).
2. nonmetal flexible compound continuous-tube extracting device of oil as claimed in claim 1, is characterized in that: described well mouth hanger (1) upper design has the sealing block matched with well head electric pump.
3. nonmetal flexible compound continuous-tube extracting device of oil as claimed in claim 1, it is characterized in that: linked together by sulfuration processing mode between described well mouth hanger (1) and non-metal composite pipe (2), its bonding strength is the weight that non-metal composite pipe (2) and well tool equipment hang into well.
4. nonmetal flexible compound continuous-tube extracting device of oil as claimed in claim 1, it is characterized in that: described non-metal composite pipe (2) is by topping (21), enhancement Layer (22), tensile layer (23), wire rope (24) forms; Described topping (21), enhancement Layer (22) and tensile layer (23) set gradually from outside to inside, and wire rope (24) is distributed in enhancement Layer (22) outer periphery.
5. nonmetal flexible compound continuous-tube extracting device of oil as claimed in claim 4, is characterized in that: described topping (21) material is rubber.
6. nonmetal flexible compound continuous-tube extracting device of oil as claimed in claim 4, is characterized in that: described enhancement Layer (22) material is glass fiber.
7. the nonmetal flexible compound continuous-tube extracting device of oil as described in claim 4 or 6, is characterized in that: the screen net structure that described enhancement Layer (22) weaves for multiply.
8. nonmetal flexible compound continuous-tube extracting device of oil as claimed in claim 4, is characterized in that: described tensile layer (23) is superhigh molecular weight polyethylene material.
9. nonmetal flexible compound continuous-tube extracting device of oil as claimed in claim 8, is characterized in that: the molecular weight of described ultra-high molecular weight polyethylene is 3,000,000 ~ 4,000,000.
10. nonmetal flexible compound continuous-tube extracting device of oil as claimed in claim 4, is characterized in that: described wire rope (24) is 6 ~ 8 strands, is evenly distributed on enhancement Layer (22) outer periphery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410726144.5A CN104481464B (en) | 2014-12-04 | 2014-12-04 | Nonmetal flexible composite coiled tubing oil production device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410726144.5A CN104481464B (en) | 2014-12-04 | 2014-12-04 | Nonmetal flexible composite coiled tubing oil production device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104481464A true CN104481464A (en) | 2015-04-01 |
| CN104481464B CN104481464B (en) | 2017-09-01 |
Family
ID=52756056
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410726144.5A Active CN104481464B (en) | 2014-12-04 | 2014-12-04 | Nonmetal flexible composite coiled tubing oil production device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104481464B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114683563A (en) * | 2020-12-25 | 2022-07-01 | 中国石油化工股份有限公司 | Machining and mounting method of oil production pipe joint and oil production pipe joint |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1903178A2 (en) * | 1999-12-20 | 2008-03-26 | Halliburton Energy Services, Inc. | Three dimensional steerable system |
| CN102448720A (en) * | 2009-04-16 | 2012-05-09 | 雪佛龙美国公司 | Structural components for oil, gas, exploration, refining and petrochemical applications |
| CN102889437A (en) * | 2012-10-08 | 2013-01-23 | 孟庆义 | Flexible compound oil pipe |
| CN203516030U (en) * | 2013-09-27 | 2014-04-02 | 中国石油天然气股份有限公司 | Oil extraction device of non-metal pipe oil-submersible screw pump |
| CN104141838A (en) * | 2013-05-10 | 2014-11-12 | 江苏申视新材料科技有限公司 | Flexible composite high-pressure delivery pipe |
| CN204371252U (en) * | 2014-12-04 | 2015-06-03 | 中国石油天然气股份有限公司 | Nonmetal flexible composite coiled tubing oil production device |
-
2014
- 2014-12-04 CN CN201410726144.5A patent/CN104481464B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1903178A2 (en) * | 1999-12-20 | 2008-03-26 | Halliburton Energy Services, Inc. | Three dimensional steerable system |
| CN102448720A (en) * | 2009-04-16 | 2012-05-09 | 雪佛龙美国公司 | Structural components for oil, gas, exploration, refining and petrochemical applications |
| CN102889437A (en) * | 2012-10-08 | 2013-01-23 | 孟庆义 | Flexible compound oil pipe |
| CN104141838A (en) * | 2013-05-10 | 2014-11-12 | 江苏申视新材料科技有限公司 | Flexible composite high-pressure delivery pipe |
| CN203516030U (en) * | 2013-09-27 | 2014-04-02 | 中国石油天然气股份有限公司 | Oil extraction device of non-metal pipe oil-submersible screw pump |
| CN204371252U (en) * | 2014-12-04 | 2015-06-03 | 中国石油天然气股份有限公司 | Nonmetal flexible composite coiled tubing oil production device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114683563A (en) * | 2020-12-25 | 2022-07-01 | 中国石油化工股份有限公司 | Machining and mounting method of oil production pipe joint and oil production pipe joint |
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| Publication number | Publication date |
|---|---|
| CN104481464B (en) | 2017-09-01 |
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