CN1676863A - Oil well pipe or sucker rod feature marking method - Google Patents
Oil well pipe or sucker rod feature marking method Download PDFInfo
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- CN1676863A CN1676863A CN 200410021214 CN200410021214A CN1676863A CN 1676863 A CN1676863 A CN 1676863A CN 200410021214 CN200410021214 CN 200410021214 CN 200410021214 A CN200410021214 A CN 200410021214A CN 1676863 A CN1676863 A CN 1676863A
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- well pipe
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Abstract
This invention involves one kind of oil well tube or oil extraction rod characteristic marking method, whose characteristic is: for the oil well tube, the oil extraction rod or they connect above the initialization may bring the electricity, the magnetism signal change code mark; The advantage uses electricity, magnetism examination technology to these code marks, thus examines, then to examine the signal which obtains carries on the decoding recognition. This invention provides the oil well tube, the oil extraction rod status recognition method merit is: The cost is low, the establishment code is easy, the examination is convenient, the working conditions influence, the reliability is not been good, the technology is mature, may realize to the oil well tube, the oil extraction rod scientific management, reasonable and useful.
Description
Technical field:
The present invention relates to the mark recognition method of spare part, the signature identification method of a kind of oil well pipe or sucker rod is provided especially.
Background technology:
At present there are 60,000 mouthfuls of various rod-pumped wells in China, have now labour, deposit and wait to keep in repair after oil pipe, the sucker rod of going into the well again respectively have several hundred million meters.Owing to lack available mark and recognition technology and effective management means, exist from different manufacturers, be produced in various years, be distributed in new and old in different oil, the well is regardless of, good and bad difficulty is distinguished oil pipe and sucker rod, old, in, few three generations or the pipe of longer time, bar be with the universal phenomenon of labour a bite well.Under this situation, people are unable to find out information such as the alloy designations, generation production year, manufacturer, military service history of certain root oil pipe or sucker rod, just can't carry out the management of science certainly.Because (amount of being filled with water of wooden barrel is by the height decision of minimum plank for well-known wooden barrel effect and chain effect, the destruction of arbitrary joint of chain just makes whole chain destroy), the oil pipe of different size and grade, different historical, the different performances of being on active service, sucker rod use a lot of oil pipes, the rod parting accident of having caused with, cause great waste to country, brought very big difficulty for the production of recovering the oil.For this reason, oil pipe, sucker rod are carried out mark and identification and carry out the computer tracking management, can use each root oil pipe and sucker rod scientifically and rationally, timely retired expired oil pipe and sucker rod, reduce break-off accident, help using manpower and material resources sparingly and the valuable production time, for ensureing that the oil field ordinary production is significant.
Traditional identity management method (as beating grade of steel, typewriting sign indicating number, tinting) is because of reasons such as wearing and tearing, grunge pollution, long-pending waxes, can not realize effective identification to oil pipe and sucker rod, and the identification method in fields such as logistics (as bar code, magnetic card, IC-card etc.) is also because of the high temperature that can not adapt to oil well, deep-etching, the working environment of long-pending wax and the operating condition in oil field, and can not realize effective identification to oil pipe and sucker rod, cause the standardized management that can't realize oil pipe and sucker rod.And there is no the report and the patented technology of the identification of relevant oil pipe, sucker rod both at home and abroad, this is a new technical field.
Summary of the invention:
The object of the present invention is to provide the signature identification method of a kind of oil well pipe or sucker rod, the making of mark and the method for identification marking are simple, and adverse circumstances that can adapt under the oil well and recover the oil of mark itself are prolonged constant.
The invention provides the signature identification method of a kind of oil well pipe or sucker rod, it is characterized in that:
Labeling method: give and preset the coded markings that can bring electricity, magnetic signal to change on oil well pipe, sucker rod or their box cupling;
Recognition methods: utilize electricity, magnetic detection technique that these coded markings are detected, then to detecting the signal that the obtains identification of decoding.
In the signature identification method of oil well pipe of the present invention or sucker rod, described coded markings is to utilize the ferromagnetism character of oil well pipe, sucker rod or their box cupling, the information flag of the magnetization change that forms on oil well pipe, sucker rod or their box cupling.
In the signature identification method of oil well pipe of the present invention or sucker rod, described coded markings is, spraying or cohere the thin layer magnetic material mark of formation on oil well pipe, sucker rod or their box cupling.
In the signature identification method of oil well pipe of the present invention or sucker rod, described coded markings is the generation magnetic that contains, the code element of electrical effect on additional on oil well pipe, sucker rod or their box cupling nonmagnetic substance annex.
In the signature identification method of oil well pipe of the present invention or sucker rod, described coded system is preferably and is the binary system formula, perhaps is the ternary formula.
In the signature identification method of oil well pipe of the present invention or sucker rod, described coding method is preferably the ID method.
In the signature identification method of oil well pipe of the present invention or sucker rod, can adopt single-chip microcomputer, realize directly reading of coding the detection signal identification of decoding.
In the signature identification method of oil well pipe of the present invention or sucker rod, described single-chip microcomputer can be connected communication with computer by RS232 or USB interface, realizes the networked modern management of oil pipe or sucker rod.
The present invention can carry out mark and identification to new or old oil pipe or sucker rod, its advantage is: mark is not subjected to the influence of working environment, do not influence existing oil producing operation technology yet, can long preservation, mark cost and identification cost are low, the identification of can decoding under the state that greasy dirt and long-pending wax are arranged, easy to detect, good reliability, technology maturation can realize oil pipe and or the scientific management of sucker rod, rationally uses.
Description of drawings:
Oil pipe or the coding method of sucker rod local magnetized signal among Fig. 1 embodiment 1;
A, B, the signal of the magnetic field distribution when C organizes the coil local magnetized among Fig. 2 embodiment 1;
Signal that the N utmost point that synthesize the magnetization back among Fig. 3 embodiment 1 magnetizes and S utmost point magnetization leakage field distributes;
Utilize a Magnetic Flux Leakage Inspecting probe on workpiece, to carry out the signal of straight line scanning detection method among Fig. 4 embodiment 1;
Utilize the Magnetic Flux Leakage Inspecting probe of one group of fixed intervals directly to carry out the detection method signal among Fig. 5 embodiment 1;
Fig. 6 will survey the scanning signal to handle a series of coded pulse of formation through shaping among the embodiment 1;
Fig. 7 is for being processed into coding with one group of direct amplification of the detected signal of popping one's head among the embodiment 1;
Fig. 8 is the ring code of mark signal on the workpiece body of rod or body among the embodiment 2;
Fig. 9 is in the circular sign indicating number signal of the threshold marker of the body of rod among the embodiment 2;
Figure 10 is the annular coding signal of embodiment 2 middle tube body threshold markers;
Figure 11 is in the fan-shaped sign indicating number signal of the threshold marker of the body of rod among the embodiment 2;
Figure 12 is thin annular cylinder shape accessory structure signal on the workpiece body of rod or body among the embodiment 3;
Figure 13 illustrates at the end of workpiece body of rod thin discs shape accessory structure among the embodiment 3;
Figure 14 is the thin annular accessory structure signal in the end of workpiece body among the embodiment 3;
Figure 15 is the thin annular accessory structure signal in the end of rod collar among the embodiment 3;
Figure 16 is the thin annular accessory structure signal in the end of tubing coupling among the embodiment 3;
Figure 17 is vertical placement code element and a detection probe relativeness in the annex among the embodiment 3;
Figure 18 is horizontal placement code element and a detection probe relativeness in the annex among the embodiment 3.
The specific embodiment:
Embodiment 1:
With some key characters of workpiece (as the date of manufacture of R a T, grades etc.) information is directly encoded by certain rule, but preferably each workpiece is specified the number (being called for short ID number) of a similar identity card, sucker rod of each ID correspondence or oil pipe like this, utilize microcomputer can retrieve pairing many important informations according to ID number, as the date of manufacture of R a T, grade, specification, material, manufacturer, bulk informations such as military service history, the advantage of ID coding rule are can encode out at limited space encoder to represent the sign indicating number of a large amount of information.And then translate into binary system or ternary code with ID number, and this coding is input to the coding controller of local magnetized coding generating means.Or directly translate into control signal corresponding according to ID number by coding controller.
In the certain limit that on the Workpiece length direction, begins with an ad-hoc location, under the control of coding controller, carry out local magnetized or do not magnetize with fixed intervals, such magnetization preferably the annular, also can of bar shaped, such magnetization with do not magnetize two states and just can form binary code, can also change the difference of direction (the N utmost point, the S utmost point), realize according to the magnetization of the N utmost point, the magnetization of the S utmost point and do not magnetize three kinds of states carrying out the ternary coding the workpiece local magnetized.
When carrying out the local magnetized label coding, shown in Fig. 1 strip ferromagnetic workpiece (as oil pipe or sucker rod) local magnetized coding method schematic diagram, local magnetized coding generating means is to utilize a series of main magnetization loop A
1～An and bias winding B
1～Bn and C
1～Cn carries out each section local magnetized to oil pipe, sucker rod body under the control of coding controller, form a series of magnetization coding collar.Coding controller is controlled k, and (k=1～n) the group coil is workpiece to be switched on to magnetizing or the no power magnetization, and also N extreme direction magnetization or S extreme direction magnetization are carried out in control.Shown in Fig. 2,3, A group main coil is can be with the local saturated magnetization of workpiece, B group and C group coil are that A group part, coil both sides is carried out and the rightabout magnetization of A group coil, it is weak that its magnetization degree is wanted, by design and control, make the B group and the C group intensity of magnetization that coil produced and the A group intensity of magnetization that coil produced superimposed, distribute thereby form the narrower intensity of magnetization.Magnetic field distribution when Fig. 2 is A, B, C group coil local magnetized, Fig. 3 is the synthetic N utmost point and the S utmost point leakage field distribution schematic diagram in magnetization back.So just form the ring-type leakage field distribution of a series of formation codings at surface of the work.
Soft magnetism magnetic core with high magnetic conduction in a series of magnetizing coils in the local magnetized code device is full of, the direct contact workpiece of magnetic core, a series of magnetizing coil is fixed on the skeleton of non-magnetic conduction, when this skeleton rotates a circle around workpiece, some in check coil electricity carries out local magnetized to workpiece, thereby forms the stray field of ring-type and constitute coding at surface of the work.
When the coding of being done was discerned, the sniffer of sign indicating number was to utilize the Magnetic Flux Leakage Inspecting technology that the leakage field of surface of the work is detected, thereby discerns and decode.During identification, as shown in Figure 4, utilize a Magnetic Flux Leakage Inspecting probe to carry out the straight line scanning on workpiece, also can utilize the Magnetic Flux Leakage Inspecting probe of one group of fixed intervals directly to detect as shown in Figure 5, among Fig. 4,5,1 is workpiece, and 3 are coding, and 4 is detection probe.Magnetic Flux Leakage Inspecting probe can be surveyed Magnetic Sensor with Hall element or Magnetic Flux Leakage Inspecting coil or test coil of eddy current or magnetodiode, magnetic sensitive transistor, mistor etc., detectable signal is formed a series of coded pulse shown in Fig. 6 (signal-time diagram) after shaping is handled, or one group of direct amplification of the detected signal of popping one's head in is processed into coding shown in Fig. 7 (signal-distance map).
It is the hand-held leakage field mark identifier that constitutes with single-chip microcomputer to the identification of decoding of above-mentioned coded pulse or coding that read apparatus is conciliate in the demonstration of sign indicating number, can instant playback or print coded message, as ID number, specification, grade, material, manufacturer, date of manufacture, and information such as military service history.So just can learn this sucker rod or the oil pipe account of the history that once be on active service in which position in which well, thereby learn the load that stood and tired situation and the corrosion situation that is stood, just can in time demote according to these information and use or in time carry out retired processing.
The leakage field mark identifier that is made of single-chip microcomputer of handhold portable can pass through RS232 or USB and computer interconnection communication, in conjunction with the powerful management software of host computer, can realize oil pipe and or the networked modern management of sucker rod.
Embodiment 2:
With some key characters of workpiece (as the date of manufacture of R a T, grades etc.) information is directly encoded by certain rule, but preferably each workpiece is specified the number (being called for short ID number) of a similar identity card, sucker rod of each ID correspondence or oil pipe like this, utilize microcomputer can retrieve pairing many important informations according to ID number, as the date of manufacture of R a T, grade, specification, material, manufacturer, bulk informations such as military service history, the advantage of ID coding rule are can encode out at limited space encoder to represent the sign indicating number of a large amount of information.And then translate into binary code with ID number, and represent 0 as no code element, the magnetic material code element represents 1, carries out binary coding and arranges code element.
New or old oil pipe and/or sucker rod are applied the magnetic material thin layer to be done the method and the recognition methods thereof of signature and is: in oil pipe, sucker rod appropriate location, by certain coding rule, the spraying or cohere the thin layer magnetic material, utilize electromagnetic exploration apparatus that coding is discerned.
In the appropriate location of workpiece can be the body of rod or body on workpiece appropriate location (this moment, code labeling was annular) as shown in Figure 8, also can be at the body of rod end (this moment code labeling district be circular) as shown in Figure 9, or the end of body (this moment, the code labeling district was an annular) is as shown in figure 10.The symbols encoded shape is respectively annular shape (Fig. 8) and circle spot shape (Fig. 9, Figure 10) or fan shape (Figure 11).Among Fig. 8,9,10,11,1 is workpiece (sucker rod or oil pipe), and 3 are coding.
It can be that powder (as ferrite powder) with magnetic material sprays on the body of workpiece that the magnetic material thin layer is put on applying method on sucker rod or the oil pipe, the powder coating that forms series of thin constitutes coding, also can be with a kind of glue that can under oil well high temperature, work and even saturated mixing of the powder of magnetic material, utilize epoxy glue that the coding mould will contain powder to be applied to form on the workpiece one deck thin with the powder glue-line workpiece adhesive bond.The coding site of the formed code element shape basis of these powder coatings or glue-line on workpiece is respectively annular shape and circle spot shape or fan shape.
Magnetic material powder can be the soft magnetic materials (as ferrite powder) of high magnetic conduction, also can be hard magnetic material (as neodymium iron boron).
Identification method provided by the invention is to utilize Electromagnetic Testing Technology that the magnetic characteristic of thin layer (coating or glue-line) code element or code element is wherein detected, thereby discerns and decode.During identification, utilize an electromagnetic detection probe on workpiece, to carry out straight line scanning or circumferential scan (decide the position according to coding), also can utilize the electromagnetic detection probe of one group of fixed intervals directly to detect, electromagnetic detection probe can be surveyed Magnetic Sensor with Hall element or test coil of eddy current or magnetodiode, magnetic sensitive transistor, mistor etc., detectable signal is formed a series of coded pulse after shaping is handled, or one group of direct amplification of the detected signal of popping one's head in is processed into coding.
If the magnetic material that is applied is the soft magnetic materials of high magnetic conduction, then when detecting recognition coding, use eddy current probe comparatively suitable, at this moment since eddy current probe down if there is the powder bed of high magnetic conduction tangible signal will occur, detection sensitivity is higher; If the magnetic material that is applied is the hard magnetic material code element, if its magnetic disappears in the back of going into the well, when reading sign indicating number identification, can magnetize again to it, recover the magnetic signal of code element.
It is the hand-held leakage field mark identifier that constitutes with single-chip microcomputer to the identification of decoding of above-mentioned coded pulse or coding that read apparatus is conciliate in the demonstration of sign indicating number, can instant playback or print coded message, as ID number, specification, grade, material, manufacturer, date of manufacture, and information such as military service history.So just can learn this sucker rod or the oil pipe account of the history that once be on active service in which position in which well, thereby learn the load that stood and tired situation and the corrosion situation that is stood, just can in time demote according to these information and use or in time carry out retired processing.
The leakage field mark identifier that is made of single-chip microcomputer of handhold portable can pass through RS232 or USB and computer interconnection communication, in conjunction with the powerful management software of host computer, can realize oil pipe and or the networked modern management of sucker rod.
Embodiment 3:
With some key characters of workpiece (as the date of manufacture of R a T, grades etc.) information is directly encoded by certain rule, but preferably each workpiece is specified the number (being called for short ID number) of a similar identity card, sucker rod of each ID correspondence or oil pipe like this, utilize microcomputer can retrieve pairing many important informations according to ID number, as the date of manufacture of R a T, grade, specification, material, manufacturer, bulk informations such as military service history, the advantage of ID coding rule are can encode out at limited space encoder to represent the sign indicating number of a large amount of information.And then translate into binary system or ternary code or the quaternary and quinary code with ID number, and will encode and arrange and place code element by the numerical value of variant electromagnetic property code element representative.As do not have code element and represent 0, the high magnetic conductivity code element of irony represents 1, and copper high conductivity code element represents 2, carries out the ternary coding.
The additional electromagnetic property code element annex that contains of new or old oil pipe and/or sucker rod is done the method and the recognition methods thereof of signature and is: in oil pipe, sucker rod appropriate location, the annex of additional nonferromagnetic, these annexes are thinner usually, the code element that contains different electromagnetic propertys (as conductance difference, permeability difference) in the annex is arranged code element by certain coding rule and is formed coding; Utilize electromagnetic-field detector that coding is discerned.
The appropriate location that annex added can be the body of rod or body on workpiece appropriate location (this moment, annex was thin annular cylinder shape) as shown in figure 12, also can be at the body of rod the end (this moment annex be thin discs shape, as shown in figure 13) or (this moment, annex was thin annular in the end of body, as shown in figure 14), can also be that (this moment, annex was thin annular for end at rod collar, as shown in figure 15) or (this moment, annex was thin annular, as shown in figure 16) in the end of oil pipe.Additional nonferromagnetic annex can be that materials such as stainless steel, aluminium alloys, plastics, electrical insulating material (as the epoxy fabric swatch etc.) are made.The workpiece that 1 representative of accompanying drawing 12,13,14,15,16,17,18 is identified, as oil pipe or sucker rod, the annex that the representative of 2 among the figure is added, 3 among the figure represents code element, and on behalf of 5 among electromagnetic detection probe, the figure, 4 among the figure represent box cupling.
The nonferromagnetic annex is additional to method of attachment on sucker rod or oil pipe method such as can use bonding, riveted joint, soldering, inlay and be threaded.Should preferentially adopt fast dry type normal temperature cure high-temp glue when bonding.
The code element of the electromagnetic property of being arranged in the nonferromagnetic annex can be made with the coil that twines on higher shot copper of little magnet steel, ferrite grain, iron and steel granule or electrical conductivity and the soft magnetic materials magnetic core.The different arrangement modes of these code elements form different codings, when arranging code element on disk or annulus, should arrange code element with fixed intervals, and set a code element as synchronous code or initial code on a privileged site.High magnetic conductivity code element like this and non-high magnetic conductivity code element (or not having code element) two states just can form binary code, can also be according to having or not code element on certain element position and being that high magnetic conductivity code element or three kinds of states of high conductivity code element carry out the ternary coding, or even the size of the size of, permeability nonmagnetic according to having, conductance is carried out quaternary coding or is carried out the quinary coding, thereby on limited element position, can compile out jumbo sign indicating number, also can reduce number of symbols, save space encoder.
Code element is small cylindrical or sequin shape normally, and code element can vertically be placed on the relevant position of nonferromagnetic annex, as shown in figure 17; Also can horizontally be placed on the relevant position of nonferromagnetic annex, as shown in figure 18.If the vertical placement of code element, then electromagnetic detection probe will face disk or annulus just can detect; If the horizontal placement of code element, then the electromagnetic detection probe will just can detect at the periphery of disk or annulus.
On the nonferromagnetic annex, to design the position (position of code element is normally equally spaced, but initial code or synchronous code then are in special position) of code element in advance, go out hole, the nest of symbol size as punch forming on annex or injection mo(u)lding or machining.During coded markings, the code element of different electromagnetic propertys is placed or arranged by certain coding rule (represent 0 as no code element, the iron code element represents 1, and wiring slip unit represents 2, carries out the ternary coding).Coding places to encapsulate after the code element code element and annex is become one, and at this moment the method for encapsulation can also should preferentially select fast dry type normal temperature cure high-temp glue for use with method such as bonding, and packaged annex carries out affixed appending on oil pipe or the sucker rod again.
When mark is discerned, be to utilize Electromagnetic Testing Technology that the electromagnetic property of the code element in the annex is detected, thereby discern and decode.During identification, utilize an electromagnetic detection probe on annex, to carry out circumferential scanning, also can utilize the electromagnetic detection probe of one group of fixed intervals directly to detect, after having aligned the position of initial code or synchronous code, just can carry out the detection and Identification of symbol signal with the detected signal instruction of electromagnetism detection probe.Electromagnetic detection probe can be surveyed Magnetic Sensor with Hall element or Magnetic Flux Leakage Inspecting coil or test coil of eddy current or magnetodiode, magnetic sensitive transistor, mistor, tongue tube etc., the detectable signal of surveying Magnetic Sensor is formed a series of coded pulse after amplification, shaping are handled, or one group of direct amplification of the detected signal of popping one's head in is processed into coding.
In the method for carrying out mark, having a kind of is as code element with winding around on the soft magnetic materials magnetic core, one end of the coil of code element is connected with the workpiece conduction, when reading sign indicating number identification, near by identifier annex excitation coil excites alternating electromagnetic field, will correspondingly induce induced potential on the code element coil like this, the induced potential by induction test probe detected symbol position has or not code element thereby identify.
It is the hand-held leakage field mark identifier that constitutes with single-chip microcomputer to the identification of decoding of above-mentioned coded pulse or coding that read apparatus is conciliate in the demonstration of sign indicating number, can instant playback or print coded message, as ID number, specification, grade, material, manufacturer, date of manufacture, and information such as military service history.So just can learn this sucker rod or the oil pipe account of the history that once be on active service in which position in which well, thereby learn the load that stood and tired situation and the corrosion situation that is stood, just can in time demote according to these information and use or in time carry out retired processing.
The leakage field mark identifier that is made of single-chip microcomputer of handhold portable can pass through RS232 or USB and computer interconnection communication, in conjunction with the powerful management software of host computer, can realize oil pipe and or the networked modern management of sucker rod.
Claims (10)
1, the signature identification method of a kind of oil well pipe or sucker rod is characterized in that:
Labeling method: give and preset the coded markings that can bring electricity, magnetic signal to change on oil well pipe, sucker rod or their box cupling;
Recognition methods: utilize electricity, magnetic detection technique that these coded markings are detected, then to detecting the signal that the obtains identification of decoding.
2, according to the signature identification method of described oil well pipe of claim 1 or sucker rod, it is characterized in that: described coded markings is, utilize the ferromagnetism character of oil well pipe, sucker rod or their box cupling, the information flag of the magnetization change that on oil well pipe, sucker rod or their box cupling, forms.
3, according to the signature identification method of described oil well pipe of claim 1 or sucker rod, it is characterized in that: described coded markings is, spraying or cohere the thin layer magnetic material mark of formation on oil well pipe, sucker rod or their box cupling.
4, according to the signature identification method of described oil well pipe of claim 1 or sucker rod, it is characterized in that: described coded markings is the generation magnetic that contains, the code element of electrical effect on additional on oil well pipe, sucker rod or their box cupling nonmagnetic substance annex.
5, according to the signature identification method of described oil well pipe of one of claim 1～4 or sucker rod, it is characterized in that: described coded system is the binary system formula.
6, according to the signature identification method of described oil well pipe of one of claim 1～4 or sucker rod, it is characterized in that: described coded system is the ternary formula.
7, according to the signature identification method of described oil well pipe of claim 5 or sucker rod, it is characterized in that: described coding method is the ID method.
8, according to the signature identification method of described oil well pipe of claim 6 or sucker rod, it is characterized in that: described coding method is the ID method.
9, according to the signature identification method of described oil well pipe of one of claim 1～4 or sucker rod, it is characterized in that: adopt single-chip microcomputer to the detection signal identification of decoding, that realizes encoding directly reads.
10, according to the signature identification method of described oil well pipe of claim 9 or sucker rod, it is characterized in that: described single-chip microcomputer is connected communication by RS232 or USB interface with computer, realizes the networked modern management of oil pipe or sucker rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410021214 CN1676863A (en) | 2004-04-02 | 2004-04-02 | Oil well pipe or sucker rod feature marking method |
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| CN 200410021214 CN1676863A (en) | 2004-04-02 | 2004-04-02 | Oil well pipe or sucker rod feature marking method |
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| CN1676863A true CN1676863A (en) | 2005-10-05 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016101886A1 (en) * | 2014-12-26 | 2016-06-30 | 梅士兵 | Identity identification method and device applied to petroleum drill pipe operation |
| CN105784835A (en) * | 2014-12-26 | 2016-07-20 | 梅士兵 | System and method for measuring damage degree of petroleum drill pipes |
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2004
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016101886A1 (en) * | 2014-12-26 | 2016-06-30 | 梅士兵 | Identity identification method and device applied to petroleum drill pipe operation |
| CN105787401A (en) * | 2014-12-26 | 2016-07-20 | 梅士兵 | Identity identification method used for petroleum drilling rod operation |
| CN105784835A (en) * | 2014-12-26 | 2016-07-20 | 梅士兵 | System and method for measuring damage degree of petroleum drill pipes |
| CN105787401B (en) * | 2014-12-26 | 2018-09-07 | 梅士兵 | A kind of personal identification method applied to oil drill rocker operation |
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