CN204457761U - With brill side direction resistivity logging tool electrode system structure - Google Patents
With brill side direction resistivity logging tool electrode system structure Download PDFInfo
- Publication number
- CN204457761U CN204457761U CN201420780172.0U CN201420780172U CN204457761U CN 204457761 U CN204457761 U CN 204457761U CN 201420780172 U CN201420780172 U CN 201420780172U CN 204457761 U CN204457761 U CN 204457761U
- Authority
- CN
- China
- Prior art keywords
- insulating layer
- retaining collar
- electrode retaining
- electrode
- side direction
- 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.)
- Expired - Fee Related
Links
- 241001074085 Scophthalmus aquosus Species 0.000 title claims abstract description 23
- 238000009413 insulation Methods 0.000 claims abstract description 26
- 239000000919 ceramic Substances 0.000 claims abstract description 23
- 229920002430 Fibre-reinforced plastic Polymers 0.000 claims abstract description 12
- 239000003365 glass fiber Substances 0.000 claims abstract description 12
- 238000000576 coating method Methods 0.000 claims description 16
- 239000000853 adhesive Substances 0.000 claims description 4
- 230000001070 adhesive effect Effects 0.000 claims description 4
- 229910000679 solder Inorganic materials 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims 1
- 238000005553 drilling Methods 0.000 abstract description 8
- 230000003628 erosive effect Effects 0.000 abstract description 7
- 238000000034 method Methods 0.000 description 11
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 6
- 230000007797 corrosion Effects 0.000 description 6
- 238000005260 corrosion Methods 0.000 description 6
- 239000011152 fibreglass Substances 0.000 description 5
- 239000003822 epoxy resin Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 229920000647 polyepoxide Polymers 0.000 description 4
- 229920005989 resin Polymers 0.000 description 4
- 239000011347 resin Substances 0.000 description 4
- 238000003466 welding Methods 0.000 description 4
- 238000004804 winding Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000032798 delamination Effects 0.000 description 2
- LNEPOXFFQSENCJ-UHFFFAOYSA-N haloperidol Chemical compound C1CC(O)(C=2C=CC(Cl)=CC=2)CCN1CCCC(=O)C1=CC=C(F)C=C1 LNEPOXFFQSENCJ-UHFFFAOYSA-N 0.000 description 2
- 238000007654 immersion Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000011835 investigation Methods 0.000 description 2
- 238000001721 transfer moulding Methods 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 230000035800 maturation Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
Landscapes
- Insulators (AREA)
Abstract
With brill side direction resistivity logging tool electrode system structure, comprise drill collar body, first and second insulating layer and electrode retaining collar, first and second insulating layer and electrode retaining collar are located at the surface of drill collar body from inside to outside successively along drill collar body radial direction; The first described insulating layer is ceramic insulating layer or rubber insulation, and the second insulating layer is glass fibre reinforced plastic insulating layer.The utility model electrode system structure can improve the insulation of electrode system, resistance to erosion, antivibration and high temperature high voltage resistant performance, meets the needs of electrode system long-time stable, reliably working in oil/gas drilling environment.
Description
Technical field
The utility model belongs to Oil/gas Well well logging field, is specifically related to brill side direction resistivity logging tool electrode system structure.
Background technology
A kind of connector for logging while drilling realizing and apply the earliest with brill side direction resistivity logging tool, compare with induction resistivity tool while logging device with boring electromagnetic wave, its resistivity measurement scope is larger, and has the advantage that cannot be equal in the well logging of middle and high resistance stratum.This quasi-instrument mainly contains two kinds of focus methods, and one is circuit directly to drill collar for current focusing, and another kind is by producing induced-current focus on to coil power supply on drill collar.A kind of front method proposes and applies the earliest, and investigation depth is large, and focusing power is strong, but limits to by technical level, fails maturation and extensive use so far; A kind of rear method proposes and applies more late, and investigation depth is more shallow, and focusing power is more weak, but electrode system easily realizes, at present ripe also extensive use.A kind of front method is failed main cause that is ripe and business application and is: the insulation between electrode apparatus, between electrode and drill collar and electrode system insulating tape thereof wear-resisting cannot meet for a long time, the needs of high temperature, high pressure drilling environment.
Connector for logging while drilling washes away by mud when working in shaft bottom, Drilling vibration, high temperature, high pressure etc. affect, working environment is very severe, and with brill side direction resistivity tool electrode system for a long time in underground work, its insulating properties are easy to reduce, be subject to mud washes away and easily cause electrode retaining collar to damage and the shaft bottom that comes off.The electrode retaining collar shaft bottom that comes off need be salvaged, and cannot salvage, need to carry out well filling, can bring about great losses.In the past, circuit directly to electrode power supply stream focus on brill direction finding resistivity tool electrode system, due to the reason such as project organization and manufacture craft, its insulating properties, flushing resistance are poor.Often occur that insulation values is reduced to very soon after going into the well very little, insulating layer is subject to washing away the phenomenons such as serious, causing the damage with boring side direction resistivity logging tool electrode system, being difficult to meet well logging during needs.Therefore being badly in need of novel electrode system structure and preparation method, effectively solving HTHP insulating properties low, easily washing away and the problem such as high temperature high voltage resistant, to improve stability, the reliability with boring side direction resistivity logging tool.
Utility model content
The purpose of this utility model is to provide with brill side direction resistivity logging tool electrode system structure, this electrode system structure can improve the insulation of electrode system, resistance to erosion, antivibration and high temperature high voltage resistant performance, meets the needs of electrode system long-time stable, reliably working in oil/gas drilling environment.
In order to achieve the above object, the technical solution adopted in the utility model comprises drill collar body, first and second insulating layer and electrode retaining collar, and first and second insulating layer and electrode retaining collar are located at the surface of drill collar body from inside to outside successively along drill collar body radial direction; The first described insulating layer is ceramic insulating layer or rubber insulation, and the second insulating layer is glass fibre reinforced plastic insulating layer.
When the first insulating layer is ceramic insulating layer, between first and second insulating layer, be also provided with the polytetrafluorethylecoatings coatings for eliminating the first insulating layer gap.
When the first insulating layer is ceramic insulating layer, the thickness of the first insulating layer is 0.2mm-0.4mm; The thickness of polytetrafluorethylecoatings coatings is 0.5mm.
Described electrode retaining collar comprises on the electrode retaining collar that snaps together and under electrode retaining collar.
Described pin is fixed together on electrode retaining collar He under electrode retaining collar by interference fit.
Be equipped with pinhole on described electrode retaining collar He under electrode retaining collar, pin pierces on pinhole and electrode retaining collar and interference fit under electrode retaining collar; Fastening place on electrode retaining collar and under electrode retaining collar is reserved with weld seam, and commissure point is welded with solder joint.
The mounting groove being convenient to install pin is all milled with on described electrode retaining collar and under electrode retaining collar.
The inwall of described electrode retaining collar scribbles adhesive.
When the first insulating layer is rubber insulation, the thickness of the first insulating layer is 2-3mm.
Compared with prior art, the beneficial effects of the utility model are:
The first insulating layer that the utility model adopts is ceramic insulating layer or rubber insulation, and the second insulating layer is glass fibre reinforced plastic insulating layer.The ceramic insulating layer that the utility model adopts has high temperature resistant, wear-resisting, corrosion-resistant, insulation characterisitic; When the utility model first insulating layer is rubber insulation, rubber insulation is high temperature resistant, antivibration, corrosion-resistant, resistance to erosion, therefore, the utility model electrode system structure can improve the insulation of electrode system, resistance to erosion, antivibration and high temperature high voltage resistant performance, meet the needs of electrode system long-time stable, reliably working in oil/gas drilling environment, meet the needs of electrode system long-time stable, reliably working in oil/gas drilling environment, the application life of electrode system is improved greatly, and electrode system compact overall structure, manufacture craft precise and reliable are high.
Further, electrode retaining collar is led by electrode retaining collar and is interlocked under electrode retaining collar, is fixed the fixed form of rear spot welding by pin, and before changing, during built-up welding, the high temperature that produces, on the impact of glass fibre reinforced plastic insulating layer insulating properties, and effectively solves the problem that electrode retaining collar comes off.
Further, when the first insulating layer is ceramic insulating layer, between first and second insulating layer, be also provided with the polytetrafluorethylecoatings coatings in the gap for eliminating the first insulating layer; Polytetrafluorethylecoatings coatings can not only eliminate the gap of ceramic insulating layer ceramic materials simultaneously, ensures insulating properties; And in addition wear-resisting, hardness is high, corrosion-resistant, insulation is good and under any vacuum condition, there will not be the effect of delamination.
Accompanying drawing explanation
Fig. 1 be the utility model the first with brill side direction resistivity logging tool electrode system structural representation;
Fig. 2 is A-A sectional drawing in Fig. 1;
Fig. 3 is that the utility model the second is with brill side direction resistivity logging tool electrode system structural representation;
Fig. 4 is B-B sectional drawing in Fig. 3;
Fig. 5 is that the utility model is with the axial view of boring electrode retaining collar in side direction resistivity logging tool electrode system structure;
Fig. 6 is that the utility model is with the radial direction figure boring electrode retaining collar in side direction resistivity logging tool electrode system structure;
Wherein, the 1, first insulating layer, the 2, second insulating layer, 3, electrode retaining collar, 4, polytetrafluorethylecoatings coatings, 5, drill collar body, 6, on electrode retaining collar, 7, under electrode retaining collar, 8, pinhole, 9, pin, 10, mounting groove, 11, weld seam.
Detailed description of the invention
Below in conjunction with accompanying drawing, the utility model is described in further details.
See Fig. 1-6, the utility model discloses two kinds and comprise drill collar body 5 and first and second insulating layer 1 with brill side direction resistivity logging tool electrode system structure, 2 and electrode retaining collar 3, first and second insulating layer 1,2 and electrode retaining collar 3 are located at the surface of drill collar body 5 from inside to outside successively along drill collar body 5 radial direction; The first described insulating layer 1 is ceramic insulating layer or rubber insulation, and the second insulating layer 2 is glass fibre reinforced plastic insulating layer.
See Fig. 5-6, electrode retaining collar 3 to comprise on the electrode retaining collar that snaps together under 6 and electrode retaining collar 7, on electrode retaining collar 6 and electrode retaining collar under 7 be all milled with and be convenient to the mounting groove 10 of pin 9 is installed, on electrode retaining collar 6 and electrode retaining collar under 7 be equipped with pinhole 8, pin 9 to pierce on pinhole 8 and electrode retaining collar 7 interference fit under 6 and electrode retaining collar, by electrode retaining collar 6 and electrode retaining collar under 7 to be fixed together; On electrode retaining collar 6 and electrode retaining collar under 7 fastening place be reserved with weld seam 11, weld seam 11 place point is welded with solder joint, and the inwall of electrode retaining collar 3 scribbles adhesive, makes electrode retaining collar 3 be combined more firm with the second insulating layer 2; The material selection TC11 magnetism-free stainless steel of electrode retaining collar 3, has the features such as withstand voltage, easy processing, material is light, intensity is high, conduct electricity very well.
See Fig. 1 and 2, when the first insulating layer 1 is ceramic insulating layer, first and second insulating layer 1, also be provided with the polytetrafluorethylecoatings coatings 4 for eliminating the first insulating layer 1 gap between 2, ceramic insulating layer selects aluminium oxide ceramics, and aluminium oxide ceramics has the characteristics such as high temperature resistant, wear-resisting, corrosion-resistant, insulation, insulation values can reach more than 500M Ω at normal temperatures, under HTHP (175 DEG C, 140MPa), insulation values >=50M Ω, the thickness of ceramic insulating layer is 0.2mm-0.4mm; Polytetrafluorethylecoatings coatings heatproof 260 DEG C, effectively eliminate the gap of ceramic insulating layer, ensure that insulating properties, have high temperature resistant, wear-resisting, high rigidity, corrosion-resistant, insulation is good and under any vacuum condition, there will not be the characteristic of delamination, the thickness of polytetrafluorethylecoatings coatings 4 is 0.5mm.See Fig. 3 and Fig. 4, when the first insulating layer 1 is rubber insulation, the performances such as the material that rubber insulation adopts is fluorubber, has high temperature resistant (reaching 275 DEG C), antivibration, corrosion-resistant, resistance to erosion.The thickness of rubber insulation is 2-3mm.
The second insulating layer 2 adopted in above-mentioned two kinds of structures is glass fibre reinforced plastic insulating layer, the material that this glass fibre reinforced plastic insulating layer adopts is epoxy resin, glass fiber reinforced plastic is selected high temperature resistant, high pressure resistant, wear-resisting, resistance toly wash away epoxy resin (high temperature 275 DEG C, high pressure 140MPa), and in the first structure (when namely the first insulating layer 1 is ceramic insulating layer, glass fibre reinforced plastic insulating layer can protect ceramic insulating layer and polytetrafluorethylecoatings coatings 4, painting ceramic insulating layer and polytetrafluorethylecoatings coatings 4 when installing electrodes ring 3 is avoided directly to contact with electrode retaining collar 3 inner surface and damage ceramic insulating layer and polytetrafluorethylecoatings coatings 4, avoid destroying electrode system integral insulation performance.
See Fig. 1-2 and Fig. 5-6, when the first insulating layer 1 is ceramic insulating layer, when the second insulating layer 2 is glass fibre reinforced plastic insulating layer, comprise the following steps:
1) mode of pyrolytic coating (temperature is 2038 DEG C) is adopted to form first insulating layer 1 of 0.2mm-0.4mm on drill collar body 5 surface of having polished, then adopt hot-spraying technique to form 0.5mm polytetrafluorethylecoatings coatings 4 on the surface of the first insulating layer 1, then adopt glass reinforced plastic winding technique to be wound around the second insulating layer 2 on polytetrafluorethylecoatings coatings 4 surface; Glass reinforced plastic winding technique vacuumizes in first chamber, then use VARTM (vacuum assisted resin transfer molding) technology of injector injection ring epoxy resins, and it is immersion that the method can improve the mobility of resin in mold cavity, drains bubble better;
2) 7 are installed on the electrode retaining collar being equipped with pinhole 8 under 6 and electrode retaining collar on the surface of the second insulating layer 2, and 7 to snap together under making on electrode retaining collar 6 and electrode retaining collar, on electrode retaining collar 6 and electrode retaining collar under 7 the axis of pinhole 8 be positioned at straight line, on electrode retaining collar 6 and electrode retaining collar under 7 fastening place allowance weld 11, on electrode retaining collar 6 and electrode retaining collar under 7 all mill out mounting groove 10, then pin is put into mounting groove 10, pin 9 is pierced into pinhole 8 and electrode retaining collar 3 interference fit, form electrode retaining collar 3;
3) at reserved weld seam 11 place weld nugget, obtain with brill side direction resistivity logging tool electrode system structure; Effectively solve the problem that electrode retaining collar 4 comes off.
When the first insulating layer 1 is rubber insulation, when the second insulating layer is glass fibre reinforced plastic insulating layer, comprise the following steps:
1) adopt the shaping mode of moulding to form first insulating layer 1 of 2-3mm on drill collar body 5 surface of having polished, then adopt glass reinforced plastic winding technique second insulating layer 2 on the first insulating layer 1 surface; Glass reinforced plastic winding technique vacuumizes in first chamber, then use VARTM (vacuum assisted resin transfer molding) technology of injector injection ring epoxy resins, and it is immersion that the method can improve the mobility of resin in mold cavity, drains bubble better;
2) 7 are installed on the electrode retaining collar being equipped with pinhole 8 under 6 and electrode retaining collar on the surface of the second insulating layer 2, and 7 to snap together under making on electrode retaining collar 6 and electrode retaining collar, on electrode retaining collar 6 and electrode retaining collar under 7 the axis of pinhole 8 be positioned at straight line, on electrode retaining collar 6 and electrode retaining collar under 7 fastening place allowance weld 11, on electrode retaining collar 6 and electrode retaining collar under 7 all mill out mounting groove 10, then pin is put into mounting groove 10, pin 9 is pierced into pinhole 8 and electrode retaining collar 3 interference fit, form electrode retaining collar 3; Wherein, on installing electrodes ring 6 and electrode retaining collar under before 7, on electrode retaining collar 6 and electrode retaining collar under 7 inner surface uniform application one deck bonding adhesive.
3) at reserved weld seam 11 place weld nugget, obtain, with brill side direction resistivity logging tool electrode system structure, effectively solving the problem that electrode retaining collar 3 comes off.
The utility model is specially adapted to brill side direction resistivity logging tool, to improve the performances such as the insulation of electrode system, resistance to erosion, antivibration and high temperature high voltage resistant.The utility model also can be used for similar side direction quasi-resistance rate logger.This electrode system structural entity compact conformation, manufacture craft precise and reliable are high, have that insulating properties are high, bonding firm, the resistance to erosion of insulating layer, anti-vibration, the advantage such as high temperature resistant, high pressure resistant, stability, the reliability with boring side direction resistivity logging tool can be significantly improved, can be applicable to similar logger, down-hole slurry is effectively prevented to immerse electrode system insulating layer and reduce insulating properties, solve electrode retaining collar to come off, the application life of electrode system is improved greatly.And electrode retaining collar adopts upper and lower electrode retaining collar to interlock, and is fixed the fixed form of rear spot welding by pin, before changing, during built-up welding, the high temperature that produces, on the impact of glass fibre reinforced plastic insulating layer insulating properties, and effectively solves the problem that electrode retaining collar comes off.
Claims (9)
1. with brill side direction resistivity logging tool electrode system structure, it is characterized in that: comprise drill collar body (5), first and second insulating layer (1,2) and electrode retaining collar (3), first and second insulating layer (1,2) and electrode retaining collar (3) are located at the surface of drill collar body (5) from inside to outside successively along drill collar body (5) radial direction; Described the first insulating layer (1) is ceramic insulating layer or rubber insulation, and the second insulating layer (2) is glass fibre reinforced plastic insulating layer.
2. according to claim 1 with brill side direction resistivity logging tool electrode system structure, it is characterized in that: when the first insulating layer (1) is for ceramic insulating layer, the polytetrafluorethylecoatings coatings (4) for eliminating the first insulating layer (1) gap is also provided with between first and second insulating layer (1,2).
3. according to claim 1 and 2 with brill side direction resistivity logging tool electrode system structure, it is characterized in that: when the first insulating layer (1) is for ceramic insulating layer, the thickness of the first insulating layer (1) is 0.2mm-0.4mm; The thickness of polytetrafluorethylecoatings coatings (4) is 0.5mm.
4. according to claim 1 with brill side direction resistivity logging tool electrode system structure, it is characterized in that: described electrode retaining collar (3) to comprise on the electrode retaining collar that snaps together under (6) and electrode retaining collar (7).
5. according to claim 4 with brill side direction resistivity logging tool electrode system structure, it is characterized in that: (7) under (6) on electrode retaining collar and electrode retaining collar are fixed together by interference fit by pin (9).
6. according to claim 5 with brill side direction resistivity logging tool electrode system structure, it is characterized in that: on described electrode retaining collar, under (6) and electrode retaining collar, (7) are equipped with pinhole (8), pin (9) pierces into pinhole (8) and (7) interference fit under (6) on electrode retaining collar and electrode retaining collar; On electrode retaining collar, under (6) and electrode retaining collar, the fastening place of (7) is reserved with weld seam (11), and weld seam (11) place point is welded with solder joint.
7. according to claim 5 with brill side direction resistivity logging tool electrode system structure, it is characterized in that: on described electrode retaining collar, under (6) and electrode retaining collar, (7) are all milled with the mounting groove (10) being convenient to installation pin (9).
8. according to claim 1 with brill side direction resistivity logging tool electrode system structure, it is characterized in that: the inwall of described electrode retaining collar (3) scribbles adhesive.
9. according to claim 1 with brill side direction resistivity logging tool electrode system structure, it is characterized in that: when the first insulating layer (1) is for rubber insulation, the thickness of the first insulating layer (1) is 2-3mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420780172.0U CN204457761U (en) | 2014-12-10 | 2014-12-10 | With brill side direction resistivity logging tool electrode system structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420780172.0U CN204457761U (en) | 2014-12-10 | 2014-12-10 | With brill side direction resistivity logging tool electrode system structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204457761U true CN204457761U (en) | 2015-07-08 |
Family
ID=53664663
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420780172.0U Expired - Fee Related CN204457761U (en) | 2014-12-10 | 2014-12-10 | With brill side direction resistivity logging tool electrode system structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204457761U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104453883A (en) * | 2014-12-10 | 2015-03-25 | 中国石油天然气集团公司 | Electrode system structure for lateral resistivity logging while drilling instrument and method for manufacturing electrode system structure |
| CN105756662A (en) * | 2016-03-10 | 2016-07-13 | 中国海洋石油总公司 | Lateral log equipment electrode system |
| CN106609665A (en) * | 2015-10-27 | 2017-05-03 | 北京环鼎科技有限责任公司 | Slim hole array-sensing glass reinforced plastic shell |
| CN107869347A (en) * | 2016-09-22 | 2018-04-03 | 中国石油天然气股份有限公司 | Logging-while-drilling instrument and manufacturing method of azimuth polar plate structure |
| CN108868743A (en) * | 2018-06-19 | 2018-11-23 | 中国海洋石油集团有限公司 | A kind of resistivity tool |
| CN109184671A (en) * | 2018-08-28 | 2019-01-11 | 中国地质大学（武汉） | A kind of electromagnetic measurement while drilling underground signal reception pup joint equipment |
-
2014
- 2014-12-10 CN CN201420780172.0U patent/CN204457761U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104453883A (en) * | 2014-12-10 | 2015-03-25 | 中国石油天然气集团公司 | Electrode system structure for lateral resistivity logging while drilling instrument and method for manufacturing electrode system structure |
| CN106609665A (en) * | 2015-10-27 | 2017-05-03 | 北京环鼎科技有限责任公司 | Slim hole array-sensing glass reinforced plastic shell |
| CN106609665B (en) * | 2015-10-27 | 2023-09-29 | 北京环鼎科技有限责任公司 | Slim hole array induction glass fiber reinforced plastic shell |
| CN105756662A (en) * | 2016-03-10 | 2016-07-13 | 中国海洋石油总公司 | Lateral log equipment electrode system |
| CN107869347A (en) * | 2016-09-22 | 2018-04-03 | 中国石油天然气股份有限公司 | Logging-while-drilling instrument and manufacturing method of azimuth polar plate structure |
| CN108868743A (en) * | 2018-06-19 | 2018-11-23 | 中国海洋石油集团有限公司 | A kind of resistivity tool |
| CN109184671A (en) * | 2018-08-28 | 2019-01-11 | 中国地质大学（武汉） | A kind of electromagnetic measurement while drilling underground signal reception pup joint equipment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204457761U (en) | With brill side direction resistivity logging tool electrode system structure | |
| CN104453883A (en) | Electrode system structure for lateral resistivity logging while drilling instrument and method for manufacturing electrode system structure | |
| CN104213911B (en) | Insulating connection structure between underground electromagnetic wave measurement-while-drilling devices and manufacturing method | |
| CN103920953A (en) | Universal ultrasonic-assisted inner jetted dielectric electric discharge machining (EDM) milling tool head and manufacturing method thereof | |
| CN103433576B (en) | A kind of self-induction-Nei of insulative ceramic coatings metal rushes liquid electric discharge machining method | |
| CN206319070U (en) | A kind of electrolytic manganese palisading type positive plate | |
| CN108213624B (en) | A kind of tool and method of electric-spark drilling and reaming Compound Machining elongated hole | |
| CN203778908U (en) | Lossless electrode for electric spark machining | |
| CN103878456B (en) | A kind of harmless electrode for spark machined | |
| CN201245707Y (en) | Oil pipe anti-corrosive device | |
| CN208304086U (en) | A kind of cathode construction of the Electrolyzed Processing for small size inner wall annular groove | |
| CN104907756B (en) | Three lobe lower electrode arrangement of clamping soldering part when irregular parts weld | |
| CN207611656U (en) | A kind of packet magnetic assembly and column packet magnetic assembly | |
| CN107816344B (en) | While-drilling lateral electrode system main-screen integrated electrode structure and preparation method thereof | |
| CN202117080U (en) | Anticorrosive insulating building foundation | |
| CN205383171U (en) | A intelligent gasket device for $monitoring bolted connection interface | |
| CN104197970A (en) | Novel low-cost high-frequency ultrasonic sensor | |
| CN202469299U (en) | Extra high voltage electrode flange | |
| CN102601590B (en) | Method for processing special wind pressure acquisition sealing joints for testing of motors | |
| CN211018416U (en) | Motor magnetic steel | |
| CN218324771U (en) | Hollow sucker rod for well washing | |
| CN213138388U (en) | Polyurethane roller | |
| CN205172742U (en) | Novel fill design of sodium cylinder jacket | |
| CN205752683U (en) | A kind of closed type high frequency coaxial part | |
| CN110508884A (en) | Big depth-to-width ratio narrow slot structure rifling jet stream electrochemical machine tool and its processing method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150708 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |