CN111144155A - Oil pipe and sucker rod identity identification tracking system - Google Patents
Oil pipe and sucker rod identity identification tracking system Download PDFInfo
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- CN111144155A CN111144155A CN202010004186.3A CN202010004186A CN111144155A CN 111144155 A CN111144155 A CN 111144155A CN 202010004186 A CN202010004186 A CN 202010004186A CN 111144155 A CN111144155 A CN 111144155A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
- G06K7/10009—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves
- G06K7/10316—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves using at least one antenna particularly designed for interrogating the wireless record carriers
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Abstract
An oil pipe, sucker rod identification tracking system, relate to the oil field downhole tool technical field, including detecting probe, chip reading device and coupling, the detecting probe is installed on an installation tube independent of well head, the chip is installed on upper end of the coupling; the chip is a radio frequency electronic tag, the chip reading device is a radio frequency reader-writer, the structure of the radio frequency reader-writer comprises a radio frequency reader-writer host and a radio frequency antenna, and the radio frequency antenna is connected with the radio frequency reader-writer host through a wire; the radio frequency antenna is arranged on the inner side of the mounting cylinder, and the radio frequency antenna is connected with the radio frequency reader-writer host through a lead; the invention arranges the chip on the upper end surface of the tubing coupling or the sucker rod coupling (collectively called as the coupling) instead of the tubing or the sucker rod, and the installation mode can not influence the use of the coupling and simultaneously avoid the weakening of the strength of the tubing or the sucker rod caused by the installation of the chip.
Description
Technical Field
The invention belongs to the technical field of oil field downhole tools, and particularly relates to an oil pipe and sucker rod identity recognition tracking system.
Background
In the oil pumping unit oil extraction system, the oil pipe and the sucker rod in the oil well can be leaked or broken due to cracks, holes, corrosion and abrasion, once the condition happens, great economic loss can be caused to the oil field, and therefore, effective management on the damage condition of the oil pipe and the sucker rod is necessary. In the prior art, inspection is realized by mostly adopting an inspection method of regularly and completely pulling an oil pipe and a sucker rod back to an inspection station for flaw detection, and the method has two defects: on the one hand, consume a large amount of manpower and materials, on the other hand, be difficult to carry out accurate statistics to data such as the damage condition of every oil pipe or sucker rod, repair condition, the application in the pit, and then can't carry out make full use of to every oil pipe and sucker rod, also can't accurately judge the problem that exists in the pit according to the damage condition.
In order to solve the problem, an oil pipe online detection scheme applied to a wellhead is provided in an oil field oil pipe nondestructive testing and data remote transmission device disclosed in the utility model patent with the patent document number of CN201661851U, but the device still cannot perform full-life tracking on each oil pipe or each sucker rod although the automatic detection of the oil pipe or the sucker rod is realized.
The invention patent application with the patent application number of 2017105903287 discloses a data information acquisition and processing method for an oil pipe in each well of an oil-gas field, and the method solves the problem of tracking the oil pipe by embedding a chip in the oil pipe. However, in practical use, the following problems are found when the method is implemented: to read the chip, communication connection must be established with the chip, and how to set up a communication mode, how to ensure the validity of chip identification, how to reduce the hardware cost of a communication system, how to set up a chip identification device in a narrow annular space between a casing and an oil pipe, and the like, which series of problems must be solved by a great deal of creative work.
Disclosure of Invention
The invention aims to overcome various technical obstacles in the existing oil pipe (or sucker rod) identification tracking process by designing mechanical and hardware structures, and finally provides the oil pipe (or sucker rod) identification tracking system with good use effect, low manufacturing cost and reasonable spatial layout.
The technical problem solved by the invention is realized by adopting the following technical scheme: the invention provides an oil pipe and sucker rod identity recognition tracking system, which comprises a detection probe, a chip reading device and a coupling, wherein the detection probe is arranged on an installation barrel independent of a well mouth, and the chip is arranged on the upper end face of the coupling;
the chip is a radio frequency electronic tag, the chip reading device is a radio frequency reader-writer, the structure of the radio frequency reader-writer comprises a radio frequency reader-writer host and a radio frequency antenna, and the radio frequency antenna is connected with the radio frequency reader-writer host through a wire;
the radio frequency antenna is arranged on the inner side of the mounting cylinder, the radio frequency reader-writer host is arranged on the outer side of the mounting cylinder, and the radio frequency antenna is connected with the radio frequency reader-writer host through a wire;
an outer gear ring is arranged in the mounting cylinder, the inner diameter of the outer gear ring is the same as the minimum inner diameter of the mounting cylinder, the radio frequency antenna is embedded on the inner wall of the outer gear ring, a motor and an intermediate transmission shaft are also arranged in the mounting cylinder, one end of the intermediate transmission shaft is connected with an output shaft of the motor through a gear pair, the other end of the intermediate transmission shaft is connected with the outer gear ring through the gear pair, after the motor is started, the power of the motor is transmitted to the outer gear ring through the intermediate transmission shaft so as to drive the outer gear ring to rotate, a conducting ring is fixed on the upper end surface of the outer gear ring, the radio frequency antenna arranged in the outer gear ring is electrically connected with the conducting ring, a spring probe is arranged above the conducting ring and corresponds to the conducting ring, the lower end of the;
the outer gear ring is made of hard non-metal materials;
the side wall of the mounting cylinder is provided with an inclined hole, a steel ball is arranged in the inclined hole, and the steel ball is exposed out of the inner wall of the mounting cylinder under the action of self gravity in a natural state.
As a further technical scheme, the installation barrel is inserted into a wellhead, an eccentric section is processed on the outer side of the lower end of the installation barrel, an eccentric sleeve is sleeved on the outer side of the eccentric section, a radial sliding block is installed on the outer side of the eccentric sleeve, and the radial sliding block abuts against the inner wall of a wellhead casing pipe under a spring;
the upper end of an installation cylinder is provided with platform portion, and the diameter of platform portion is the same with the diameter of well head flange, motor and test probe are all along radially installing inside platform portion.
As a further technical scheme, a spigot is processed on the inner side of the upper end of the mounting cylinder, a nylon sleeve, a nylon ring and the outer gear ring are mounted in the spigot, and the nylon sleeve and the nylon ring are respectively positioned on the upper side and the lower side of the outer gear ring;
an axial hole is processed on a joint surface of the inner wall of the spigot and the outer wall of the nylon sleeve, and the middle transmission shaft is inserted in the axial hole.
As a further technical scheme, on the inner wall of the mounting cylinder, the distance between the upper edge of the steel ball exposed position and the lower edge of the outer gear ring is equal to the axial length of the coupling.
As a further technical scheme, the structure of the spring probe comprises a gold-plated copper pipe, a gold-plated copper needle and a spring, wherein the gold-plated copper needle is inserted into the gold-plated copper pipe and keeps the movement trend of sliding out of the gold-plated copper pipe under the action of the spring.
The invention has the beneficial effects that:
1. the invention arranges the chip on the upper end surface of the tubing coupling or the sucker rod coupling (collectively called as the coupling) instead of the tubing or the sucker rod, and the installation mode can not influence the use of the coupling and simultaneously avoid the weakening of the strength of the tubing or the sucker rod caused by the installation of the chip.
2. The invention adopts the radio frequency identification technology as a means for establishing communication with the chip, and has the advantage of low cost; the radio frequency identification technology is a very mature and easily applied chip wireless read-write technology, the structure of which comprises a radio frequency reader-writer and a radio frequency electronic tag, the basic constitution of the radio frequency reader-writer usually comprises: the radio frequency antenna, the frequency generator, the phase-locked loop, the modulation circuit, the microprocessor, the memory, the demodulation circuit, the peripheral interface and the like. To apply rfid technology to the present invention, the following two technical obstacles must be overcome:
first, the volume of current radio frequency read write line is great relatively, and the space between oil pipe and the well head sleeve pipe is less relatively, consequently, based on prior art, the radio frequency read write line can only be installed in the well head top, and installs and must change the well head height above the well head, probably causes adverse effect to follow-up operation.
Secondly, the radio frequency identification technology has the following problems when working in a metal environment: radio waves are reflected by metal in an ultrahigh frequency band, interference from the metal also scrambles RFID radio frequency signals, an RFID radio frequency reader antenna has the function of absorbing RF energy, and the metal causes eddy currents around the RFID radio frequency reader, so that the overall efficiency of an RFID electromagnetic field is reduced. These eddy currents also cause their own magnetic fields perpendicular to the metal surface, which can cause the reader area to fail. In addition, metal can also cause additional parasitic capacitance (i.e., energy loss due to electromagnetic "friction" caused by the metal), causing detuning of antennas within RFID readers and RFID tags, destroying system performance. Finally, in some frequency bands, the energy reflected by the metal can form interference between the radio frequency electronic tag and the RFID radio frequency reader-writer.
In order to overcome the first technical obstacle, the radio frequency antenna is creatively separated from the radio frequency reader-writer, and other parts except the radio frequency antenna are packaged in the radio frequency reader-writer host, the improvement is completely based on the prior art in the aspect of circuit structure, but the radio frequency antenna is separated, so that the radio frequency reader-writer host is not required to be installed above a wellhead, the change of the height of the wellhead is avoided to the maximum extent, and the adverse effect of the change of the height of the wellhead on the subsequent operation is avoided.
In order to overcome the second technical obstacle, the invention makes two creative improvements: on one hand, the radio frequency antenna and the radio frequency electronic tag are close to each other to the greatest extent, the recognition success probability is effectively increased, on the other hand, the radio frequency antenna is arranged on an outer gear ring which can rotate under the driving of a motor, and the steel ball which can support the coupling is arranged, after the coupling is supported by the steel ball, the radio frequency antenna can continuously rotate under the driving of the outer gear ring to search for the radio frequency electronic tag, and no matter which direction the radio frequency electronic tag is located when the oil pipe or the sucker rod is lifted out, the distance between the radio frequency antenna and the radio frequency electronic tag can always be the closest, so that the success rate of radio frequency recognition is ensured.
3. In the invention, the installation cylinder is not rigidly and fixedly connected with the wellhead because: when pulling out oil pipe, the great downhole tool of diameter of connection on oil pipe must be unable to pass from installation section of thick bamboo central authorities, and under this kind of condition, if installation section of thick bamboo and the rigid fixed connection of well head, the impact of downhole tool must lead to the fact irreversible destruction to downhole tool itself, well head or installation section of thick bamboo. In the invention, the eccentric sleeve is arranged at the lower part of the mounting cylinder, and after the mounting cylinder is inserted into a wellhead, the mounting cylinder can be fixed on the inner wall of a wellhead casing by rotating the mounting cylinder, but the fixing is not rigid but only fixed by friction force, and when the lower side of the mounting cylinder is impacted, the mounting cylinder can be separated from the wellhead, so that the damage to the downhole tool, the wellhead or the mounting cylinder is avoided.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic diagram of a spring probe;
FIG. 3 is a cross-sectional view at A in FIG. 1;
fig. 4 is a partially enlarged view of fig. 1 at B.
In the figure: 1-wellhead casing pipe, 2-eccentric sleeve, 3-radial slide block, 4-steel ball, 5-inclined hole, 6-installation barrel, 7-nylon ring, 8-wellhead flange, 9-platform part, 10-motor, 11-intermediate transmission shaft, 12-detection probe, 13-radio frequency reader-writer host, 14-nylon sleeve, 15-spring probe, 16-outer gear ring, 17-gold-plated copper pipe, 18-gold-plated copper needle, 19-coupling, 20-oil pipe, 21-conducting ring, 22-radio frequency antenna and 23-radio frequency electronic tag.
Detailed Description
The invention is further described below with reference to the accompanying drawings:
as shown in FIG. 1, the present invention includes a detection probe 12, a chip reader and a collar 19, which are structures existing in the prior art and are not described herein again.
The test probe 12 is mounted on a mounting cylinder 6 independent of the wellhead and the chip is mounted on the upper face of the collar 19. By adopting the structure, the original wellhead does not need to be changed when the wellhead is installed, and the installation is more convenient. In addition, the chip is arranged on the upper end surface of a tubing coupling or a sucker rod coupling (collectively called as the coupling 19) instead of the tubing or the sucker rod, so that the use of the coupling 19 is not influenced by the installation mode, and the strength of the tubing or the sucker rod is also prevented from being weakened by the installation of the chip.
The volume of current radio frequency read write line is great relatively, and the space between oil pipe 20 and well head sleeve pipe 1 is less relatively, consequently, based on prior art, the radio frequency read write line can only be installed in the well head top, and installs and must change the well head height above the well head, probably causes adverse effect to follow-up operation. In order to overcome the first technical obstacle, the invention creatively separates the radio frequency antenna 22 from the radio frequency reader-writer and encapsulates other parts except the radio frequency antenna 22 in the radio frequency reader-writer host 13, the improvement is completely based on the prior art in terms of circuit structure, but the radio frequency antenna 22 is separated, so that the radio frequency reader-writer host 13 is not required to be installed above a wellhead, the change of the height of the wellhead is avoided to the greatest extent, and the adverse effect of the change of the height of the wellhead on the subsequent operation is avoided. The concrete structure is as follows: the chip is a radio frequency electronic tag 23, the chip reading device is a radio frequency reader-writer, the structure of the radio frequency reader-writer comprises a radio frequency reader-writer host 13 and a radio frequency antenna 22, and the radio frequency antenna 22 is connected with the radio frequency reader-writer host 13 through a wire; the radio frequency antenna 22 is arranged on the inner side of the mounting cylinder 6, the radio frequency reader-writer host 13 is arranged on the outer side of the mounting cylinder 6, and the radio frequency antenna 22 is connected with the radio frequency reader-writer host 13 through a lead.
Currently, the radio frequency identification technology works in a metal environment and has the following problems: radio waves are reflected by metal in an ultrahigh frequency band, radio frequency signals are disturbed by interference from the metal, the radio frequency antenna 22 has a function of absorbing RF energy, and the metal causes eddy currents around the radio frequency reader, thereby reducing the overall efficiency of the RFID electromagnetic field. These eddy currents also cause their own magnetic fields perpendicular to the metal surface, which can cause the reader area to fail. In addition, metal can also cause additional parasitic capacitance (i.e., energy loss due to electromagnetic "rubbing" caused by the metal), causing detuning of antennas within the rf reader and rf tag 23, which can undermine system performance. Eventually, in some frequency bands, the energy reflected by the metal will cause interference between the rf tag 23 and the rf reader/writer.
In order to solve the technical obstacles, the invention is creatively improved in two aspects: on one hand, the radio frequency antenna 22 and the radio frequency electronic tag 23 are close to each other to the maximum extent, so that the recognition success probability is effectively increased, on the other hand, the radio frequency antenna 22 is arranged on an outer gear ring 16 which can rotate under the driving of a motor, and the steel ball 4 which can hold the coupling 19 is arranged, when the oil pipe 20 or the sucker rod is lifted, the upper edge of the coupling 19 pushes the steel ball 4 upwards to enable the steel ball 4 to slide along the inclined groove 5, finally, the coupling 19 can get over the steel ball 4 to reach the upper part of the steel ball 4, meanwhile, the steel ball 4 falls to the lowest position, at the moment, the lifting tension is removed, the coupling 20 can be held by the steel ball 4, and the radio frequency antenna 22 on the outer gear ring 16 and the radio frequency electronic tag 23 on. Because the distance between the upper edge of the exposed position of the steel ball 4 and the lower edge of the outer gear ring 16 on the inner wall of the mounting cylinder 6 is equal to the axial length of the coupling 19, after the coupling is held by the steel ball, the radio frequency antenna 22 can be driven by the outer gear ring 16 to continuously rotate to search the radio frequency electronic tag 23, and no matter which direction the radio frequency electronic tag 23 is located when the oil pipe or the sucker rod is lifted out, the distance between the radio frequency antenna 22 and the radio frequency electronic tag 23 can always reach the nearest and can be identified for multiple times, so that the success rate of radio frequency identification is ensured. The concrete structure is as follows:
be provided with outer ring gear 16 in the installation section of thick bamboo 6, the internal diameter of outer ring gear 16 is the same with the minimum internal diameter of installation section of thick bamboo 6, radio frequency antenna 22 inlays on outer ring gear 16's inner wall, still be provided with motor 10 and intermediate drive shaft 11 in the installation section of thick bamboo 6, the output shaft of gear pair and motor 10 is passed through to intermediate drive shaft 11's one end, and intermediate drive shaft 11's the other end passes through the gear pair and is connected with outer ring gear 16, and motor 10 starts the back, and motor 10's power transmits for outer ring gear 16 via intermediate drive shaft 11 to it is rotatory to drive outer ring gear 16.
In order to maintain reliable electrical connection between the radio frequency antenna 22 and the radio frequency reader-writer host 13 in the rotation process of the outer gear ring 16, the invention adopts the following electrical connection structure: the upper end face of the outer gear ring 16 is fixed with a conducting ring 21, a radio frequency antenna 22 installed in the outer gear ring 16 is electrically connected with the conducting ring 21, a spring probe 15 is arranged above the conducting ring 21 and corresponds to the conducting ring 21, the spring probe 15 structurally comprises a gold-plated copper pipe 17, a gold-plated copper needle 18 and a spring, and the gold-plated copper needle 18 is inserted into the gold-plated copper pipe 17 and keeps the movement trend of sliding out of the gold-plated copper pipe 17 under the action of the spring. The lower end of the spring probe 15 is abutted against the conductive ring 21, and the upper end of the spring probe 15 is connected with the radio frequency reader-writer host 13 through a lead.
The outer gear ring 16 is made of hard non-metal materials (the specific materials can be selected from materials such as nylon, polytetrafluoroethylene and engineering plastics), so that the interference of the outer gear ring 16 on the radio frequency antenna 22 can be avoided.
An inclined hole 5 is formed in the side wall of the mounting cylinder 6, a steel ball 4 is arranged in the inclined hole 5, and the steel ball 4 is exposed out of the inner wall of the mounting cylinder 6 under the action of self gravity in a natural state.
As a further technical scheme, the installation barrel 6 is inserted into a wellhead, an eccentric section is processed on the outer side of the lower end of the installation barrel 6, an eccentric sleeve 2 is sleeved on the outer side of the eccentric section, a radial sliding block 3 is installed on the outer side of the eccentric sleeve 2, and the radial sliding block 3 abuts against the inner wall of the wellhead casing 1 under a spring; in the present invention, the installation cylinder 6 is not rigidly and fixedly connected to the wellhead because: when pulling out oil pipe, the great downhole tool of diameter of connection on oil pipe must be unable to pass from installation section of thick bamboo 6 central authorities, and under this kind of condition, if installation section of thick bamboo 6 and the hard fixed connection of well head, the impact of downhole tool must lead to the fact irreversible destruction to downhole tool itself, well head or installation section of thick bamboo 6. In the invention, the eccentric sleeve 2 is arranged at the lower part of the installation cylinder 6, after the installation cylinder 6 is inserted into a wellhead, the installation cylinder 6 is rotated to fix the installation cylinder on the inner wall of a wellhead casing, but the fixation is not rigid but only fixed by friction force, but not rigid, and when the lower side of the installation cylinder 6 is impacted, the installation cylinder 6 can be separated from the wellhead, so that the damage to the downhole tool, the wellhead or the installation cylinder 6 is avoided.
The upper end of installation section of thick bamboo 6 is provided with platform portion 9, and the diameter of platform portion 9 is the same with well head flange 8's diameter, motor 10 and measuring probe 12 are all along radially installing inside platform portion 9.
As a further technical scheme, a spigot is processed on the inner side of the upper end of the mounting cylinder 6, a nylon sleeve 14, a nylon ring 7 and the outer gear ring 16 are mounted in the spigot, and the nylon sleeve 14 and the nylon ring 7 are respectively positioned on the upper side and the lower side of the outer gear ring 16; an axial hole is processed on the joint surface of the inner wall of the spigot and the outer wall of the nylon sleeve 14, and the middle transmission shaft 11 is inserted in the axial hole. The nylon sleeve 14 and the nylon ring 7 have two functions, namely, weakening the metal environment near the radio frequency antenna 22 and reducing interference, and the middle transmission shaft 11 can be smoothly installed.
Claims (5)
1. The utility model provides an oil pipe, sucker rod identification tracker, includes test probe (12), chip reading device and coupling (19), its characterized in that: the detection probe (12) is arranged on an installation barrel (6) independent of a wellhead, and the chip is arranged on the upper end face of the coupling (19);
the chip is a radio frequency electronic tag (23), the chip reading device is a radio frequency reader-writer, the structure of the radio frequency reader-writer comprises a radio frequency reader-writer host (13) and a radio frequency antenna (22), and the radio frequency antenna (22) is connected with the radio frequency reader-writer host (13) through a lead;
the radio frequency antenna (22) is arranged on the inner side of the mounting cylinder (6), the radio frequency reader-writer host (13) is arranged outside the mounting cylinder (6), and the radio frequency antenna (22) is connected with the radio frequency reader-writer host (13) through a lead;
an outer gear ring (16) is arranged in the mounting cylinder (6), the inner diameter of the outer gear ring (16) is the same as the minimum inner diameter of the mounting cylinder (6), the radio frequency antenna (22) is embedded on the inner wall of the outer gear ring (16), a motor (10) and an intermediate transmission shaft (11) are further arranged in the mounting cylinder (6), one end of the intermediate transmission shaft (11) is connected with an output shaft of the motor (10) through a gear pair, the other end of the intermediate transmission shaft (11) is connected with the outer gear ring (16) through the gear pair, after the motor (10) is started, the power of the motor (10) is transmitted to the outer gear ring (16) through the intermediate transmission shaft (11) so as to drive the outer gear ring (16) to rotate, a conductive ring (21) is fixed on the upper end face of the outer gear ring (16), the radio frequency antenna (22) arranged in the outer gear ring (16) is electrically connected with the conductive ring (21), a spring probe (15) is, the lower end of the spring probe (15) is abutted against the conducting ring (21), and the upper end of the spring probe (15) is connected with the radio frequency reader-writer host (13) through a lead;
the outer gear ring (16) is made of hard non-metal material;
the side wall of the mounting cylinder (6) is provided with an inclined hole (5), a steel ball (4) is arranged in the inclined hole (5), and the steel ball (4) is exposed out of the inner wall of the mounting cylinder (6) under the action of self gravity in a natural state.
2. The oil pipe and sucker rod identification tracking system of claim 1, wherein: the installation barrel (6) is inserted into a wellhead, an eccentric section is processed on the outer side of the lower end of the installation barrel (6), an eccentric sleeve (2) is sleeved on the outer side of the eccentric section, a radial sliding block (3) is installed on the outer side of the eccentric sleeve (2), and the radial sliding block (3) abuts against the inner wall of the wellhead casing (1) under a spring;
the upper end of installation section of thick bamboo (6) is provided with platform portion (9), and the diameter of platform portion (9) is the same with the diameter of well head flange (8), motor (10) and test probe (12) are all along radially installing inside platform portion (9).
3. The oil pipe and sucker rod identification tracking system of claim 1, wherein: a spigot is processed on the inner side of the upper end of the mounting barrel (6), a nylon sleeve (14), a nylon ring (7) and the outer gear ring (16) are mounted in the spigot, and the nylon sleeve (14) and the nylon ring (7) are respectively positioned on the upper side and the lower side of the outer gear ring (16);
an axial hole is processed on the joint surface of the inner wall of the spigot and the outer wall of the nylon sleeve (14), and the middle transmission shaft (11) is inserted in the axial hole.
4. The oil pipe and sucker rod identification tracking system of claim 1, wherein: on the inner wall of the mounting cylinder (6), the distance between the upper edge of the exposed position of the steel ball (4) and the lower edge of the outer gear ring (16) is equal to the axial length of the coupling (19).
5. The oil pipe and sucker rod identification tracking system of claim 1, wherein: the spring probe (15) structurally comprises a gold-plated copper pipe (17), a gold-plated copper needle (18) and a spring, wherein the gold-plated copper needle (18) is inserted into the gold-plated copper pipe (17) and keeps the moving trend of sliding out of the gold-plated copper pipe (17) under the action of the spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010004186.3A CN111144155B (en) | 2020-01-03 | 2020-01-03 | Oil pipe and sucker rod identity identification tracking system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010004186.3A CN111144155B (en) | 2020-01-03 | 2020-01-03 | Oil pipe and sucker rod identity identification tracking system |
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| CN111144155A true CN111144155A (en) | 2020-05-12 |
| CN111144155B CN111144155B (en) | 2020-09-25 |
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