CN101245702B - Constant-power dual side-direction well measuring equipment - Google Patents
Constant-power dual side-direction well measuring equipment Download PDFInfo
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- CN101245702B CN101245702B CN 200810001320 CN200810001320A CN101245702B CN 101245702 B CN101245702 B CN 101245702B CN 200810001320 CN200810001320 CN 200810001320 CN 200810001320 A CN200810001320 A CN 200810001320A CN 101245702 B CN101245702 B CN 101245702B
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Abstract
The invention relates to a piece of power-constant dual laterolog equipment which mainly includes a probe. The probe is formed by combining an electric circuit, a mandrel, an electrode and a GRP separation sleeve. The electrode and the separation sleeve are sheathed outside the mandrel. The interior of the electrode adopts a pressure balancing piston compensation structure. The electric circuit part is arranged inside the mandrel of the probe. The electrode of the probe is induced by a high pressure consolidation needle. The electrode and the circuit are connected by a switch joint. The power-constant double-side direction logging instrument has the beneficial effects of reducing the length of the electric circuit and creating conditions for the flexible combination of the instrument by adopting the design. The probe adopts the mode that the metal electrode is combined with the GRP separation sleeve, thus being capable of ensuring the insulating property under the conditions of high temperature and pressure, improving the logging quality and meeting the using requirements under the complex well conditions like containing sulfureted hydrogen; simultaneously, the instrument is very convenient to dismount, clean and maintain, can be reused, thus prolonging the service life.
Description
Affiliated technical field
The present invention relates to open hole well formation resistivity measuring apparatus field, oil field, mainly is a kind of constant-power dual side-direction well measuring equipment.
Background technology
Fast development along with exploration Sub-system in Computerized Logging System technology, the oil field shortcomings such as exploration logging efficient is low in order to solve, the activity duration is long, the numerous and confused large combination Quick Measuring of the high reliability platform shaft of releasing, once well logging can obtain the formation information data of radioactivity, electrical method, sound wave simultaneously, thereby greatly improves the well logging timeliness.Traditional bilateral is comprised of three parts to instrument: electronic circuit, probe and bottom electrode, nearly 10 meters of length, combination ability is poor, safety reduces when large combination logging, because the impact of its length must increase drilling depth for obtaining oil well bottom target zone data, certainly will significantly increase drilling cost simultaneously; In addition, present domestic bilateral all adopts metal electrode and the vulcanization of rubber to be integral pattern to electrode, and maintenanceability is poor, only can once use; Aspect power control techniques, generally adopt single-chip microcomputer control technology, need to process by a large amount of calculating and data, could determine the power output size, power stage lags behind during well logging.
Summary of the invention
Purpose of the present invention is just in order to overcome the deficiency of above-mentioned technology, and a kind of constant-power dual side-direction well measuring equipment that provides, be used for petroleum exploration logging, can finish simultaneously the apparent resistivity of two kinds of different investigation depths of invaded zone of stratum resistivity and virgin zone resistivity measures, variation in order to research ground interlayer resistivity, cooperate with other well-log information and can divide intuitively permeable formation, judge oil-water-layer, determine and estimate the stratum oily property.
The technical scheme that technical solution problem of the present invention adopts: this constant-power dual side-direction well measuring equipment, mainly comprise probe, described probe is combined by electronic circuit, mandrel, electrode, glass fiber reinforced plastic separation sleeve, electrode and separation sleeve are enclosed within the mandrel outside, electrode interior adopts the pressure balancing piston collocation structure, electronic circuit partly places the probe mandrel inner, and probe electrode is drawn by high densification pin, connects by crossover sub between electrode and the circuit.
Constant power double-lateral logging instrument circuit partly utilizes single-chip microcomputer to finish the digitized processing of instrument sampled signal, adopt 485 mode bus to finish communication between downhole instrument, speed is 187.5kb/s, with traditional analog signal transfer ratio, reduce interface cable core quantity, improved the instrument combination ability; The control of instrument power realizes by power control module, this module employing analog form, and the power stage reaction speed reaches Microsecond grade, and watt level can according to Log Strata information rapid adjustment, make well-log information reflect more accurately the stratum real information.
The effect that the present invention is useful is: by above-mentioned design, reduced electronic circuit length, and created condition for the flexible combination of instrument.Probe adopts metal electrode and glass fiber reinforced plastic separation sleeve combination, can guarantee the insulating properties under high temperature, the condition of high voltage, improve logging quality, and satisfy instructions for use under the complex well conditions such as H 2 S-containing gas, simultaneously, the dismounting of instrument, cleaning, maintenance are very convenient, can reuse, and prolong product application life.
Description of drawings:
Fig. 1 is complete machine structure schematic diagram of the present invention;
Fig. 2 is the structural representation of electronic circuit skeleton;
Fig. 3 is the structural representation of electronic circuit and electrode crossover sub;
Fig. 4 is the structural representation of probe dummy piston;
Fig. 5 is communication interface of the present invention and data disposable plates schematic diagram;
Fig. 6 is power control panel schematic diagram of the present invention.
Description of reference numerals: protective cap-1, upper shell-2, upper insulation sleeve I-3; pre-amplification circuit-4,26 core plug seat-5, sealed high pressure contact pin-6; mandrel-7, Metallic rod-8, electrode A 1*-9; electrode A 1-10, Compress Spring-11,31 core Plug pin patch bay-12; electrode M2-13, copper bar-14, electrode M1-15; electrode A 0-16, electrode M1 '-17, electrode M2 '-18; electrode A 1 '-19, piston-20, sealing ring-21; disk spring-22, electrode A 1* '-23, anti-friction ring-24; lower pipe nipple-25, fixed cover-26, lower contact-27; lower casing-28, protection plug-29.
The specific embodiment:
The invention will be described further below in conjunction with drawings and Examples:
The integral body realization of instrument probe is with reference to accompanying drawing 1, and the mandrel of the electrode that probe is outside and separation sleeve, inside and the structure component relationship of electronic circuit are with reference to accompanying drawing 2.
Electrode and separation sleeve are in the most external of probe, mandrel is in electrode interior, mandrel inside is the electronic circuit part, and circuit printed board, little whole installation are on circuit framework, and electrode, separation sleeve, mandrel, electronic circuit are integrated and have just consisted of the constant-power dual side-direction instrument.
Probe is comprised of the component such as electrode, separation sleeve and the mandrel that runs through instrument internal thereof.Upper shell 2 is threaded connection mandrel 7 upper ends, and there is pre-amplification circuit 4 upper shell 2 inside, and outer surface cover insulation sleeve I3, plays the electric field balanced action, and the upper end is installed 1 pair of upper probe interface of protective cap and protected.Electrode A 016, M115, M1 ' 17, M213, M2 ' 18, A110, A1 ' 19, A1*9, A1* ' 23 and separation sleeve are symmetrically distributed in mandrel 7 outsides; and the lower pipe nipple 25 that dependence is threaded with mandrel 7 lower ends compresses; all be threaded connection between lower pipe nipple 25 and lower contact 27, lower contact 27 and the lower casing 28, lower casing 28 ports are loaded onto 29 pairs of lower ends of protection plug and are protected.Mandrel 7 upper/lower terminals realize that by the sealed high pressure contact pin 6 of installing on the mandrel 7 liquid air connects, and copper bar 14, sealed high pressure contact pin 6 that electrode distributes on mandrel 7 link to each other with circuit.Compress Spring 11 in the electrode A 110 produces certain pressure with lower pipe nipple 25 actings in conjunction, compress each part of mandrel 7 outer once mounting, and make the certain distortion of sealing ring generation between part play sealing function, when Compress Spring 11 gaps in the electrode A 110 are 1-1.5mm, show that the electrode of probe, separation sleeve are seated.But, only rely on end-face seal ring can not satisfy seal request under the 140MPa high pressure.In order to address the above problem, the probe global design pressure balancing system.Be filled with silicone oil at the cylinder of the parts such as mandrel 7, electrode and separation sleeve composition and the airtight cavity of piston 20 (being positioned at electrode A 1 ' 19) composition, interelectrode insulating properties have not only been improved, and transmission is transmitted the ambient pressure of instrument internal by piston 20, when ambient pressure during greater than internal pressure, piston 20 moves inward, during practical logging, increase along with formation temperature, the volume Yin Wendu of the interior silicone oil of cavity raises and expands, pushing piston 20 is outwards mobile, and external pressure keeps autobalance in the probe.
Electrode A 1 ' 19 self balancing realizations are with reference to accompanying drawing 4.
Electrode A 1 ' 19 and internal construction thereof are as shown in Figure 4.After temperature raise, the silicone oil bulbs of pressure promoted disk spring 22 and move, when piston packing 21 slip over unload oilhole after, silicone oil is discharged probe by unloading oilhole, discharges the probe internal pressure; Ambient pressure is during greater than the silicone oil bulbs of pressure, and piston 20 moves inward, and the size that takes up space by regulating instrument internal silicone oil makes the inside and outside pressure of electrode keep dynamic equilibrium, and instrument internal pressure and ambient pressure environment differ very little.Under such small pressure difference environment, the thrust that relies on Compress Spring 11 and lower pipe nipple 25 actings in conjunction to produce is enough to satisfy the probe seal request just for separation sleeve and interelectrode sealing ring.
Electronic circuit is put into probe mandrel 7 specific implementations with reference to accompanying drawing 3.Because electronic circuit skeleton external diameter is 53mm, the probe external diameter is 99mm, for guaranteeing probe electrode, the cavity that glass fiber reinforced plastic and piston 20 form can bear the pressure of 140MPa, probe is inner must enough spaces, the expansion and the compression volume that namely guarantee silicone oil can satisfy the interior external pressure autobalance that realizes probe, simultaneously, mandrel 7 self must bear 140MPa pressure, pass through reasonable computation, take into account probe, mandrel 7 bearing capacities and actual difficulty of processing, the endoporus of mandrel 7 is designed and sized to 55mm, and be installed in component height such as transformer on the electronic circuit less than mandrel 7 interior hole dimensions, like this, the electronic circuit part just can place mandrel 7 inside, to shorten the instrument entire length.
Being connected with reference to accompanying drawing 3 between electronic circuit and the electrode.How electronic circuit guarantees the connection between probe electrode, pre-amplification circuit 4 and the electronic circuit after being positioned over mandrel 7 inside, and operating maintenance is convenient and reliable, is that structure design is considered.In design, we adopt a hollow metal bar 8, wire can be passed through in the inside, 26 core plug seats 5 are fixed in Metallic rod 8 upper ends, link to each other with pre-amplification circuit 4, electrode and probe top instrument, 31 core Plug pin patch bay 12 are fixed in the bottom, link to each other with mandrel 7 internal electron circuits, feather key of processing above the 31 core Plug pin patch bay 12 is avoided 31 core Plug pin patch bay, 12 dislocation in the connection procedure.Plug and unplug in the process at electronic circuit, the lower end holds out against electronic circuit with a fixed cover that is connected with lower pipe nipple 25 by screw thread 26.Resistance when installing for reducing electronic circuit, guarantee that simultaneously the electronic circuit skeleton does not bend in mandrel 7 inside, with mandrel good alignment is arranged, electronic circuit skeleton maximum gauge installs two pairs of anti-friction rings 24 and mandrel 7 inwall close contacts less than the mandrel diameter of bore additional at skeleton.
Communication interface and data disposable plates are with reference to accompanying drawing 5.
The dark side direction voltage of measure analog signals Vd, dark lateral current Id, shallow side direction voltage Vs, shallow lateral current Is is input to the signal input part of multidiameter option switch D11, the control signal PC0-PC5 of single-chip microcomputer is after the D6 level conversion, AO, BO, CO is connected to the control end A0 of variable connector D11, A1, A2, timesharing selected input analog signal, the analog signal of gating output is connected to the input of amplifier N2, Single-chip Controlling signal D0 selects signal gain, after 2 times or 16 times of amplifications, send into the AD574 input end of analog signal, the data after the A/D conversion are through D8, D9 74LS245 reads in single-chip microcomputer at twice.Communication between the downhole instrument realizes by microcontroller serial port TXD/RXD, IL711/712 Bus isolation and SP485 bus, after instrument receives the instruction that ground system sends, Instruction decoding is produced two control bit PC3, PC4, after the D6 level conversion, produce two path control signal B4, B5, carry out zero conversion of carving, just carving and measuring three kinds of duties, the analog signal of sampling is after gating, amplification, A/D conversion, data are stored in the single-chip microcomputer, send data by the 187.5Kb/s digit rate after receiving ground data sampling instruction.
The power control panel is with reference to accompanying drawing 6.
Produce 280Hz after N1, the N2 self-oscillation sinusoidal wave, behind LM111 comparator N3, produce the 280Hz square wave, the 280Hz square wave input is to D1CD4040, frequency division produces the 35Hz square wave, 280Hz, 35Hz square wave be minute two-way output behind the D2CD4049 reverser, one the tunnel as the rectified signal of measuring plate, and another road is as the control signal of D3, D4DG307 analog switch.
Analog signal Vd, Id, Vs, Is are input to the input of thick film circuit N4, after processing, the thick film circuit internal circuit produces the two-way DC voltage, be connected respectively to the input of analog selection switch DG307D3, D4, select control end to connect respectively two path control signal for two of the DG307 selector switch, one end is connected to 280Hz square wave and 35Hz square wave control signal, produce respectively 280Hz square wave and 35Hz square wave power control signal, by exporting after the power amplification; The other end is connected to the power signal control end, the size of control DG307 output square wave, the switching of high resistance and low resistance rate power output when realizing resistivity logging.
In addition to the implementation, the present invention can also have other embodiments.All employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop on the protection domain of requirement of the present invention.
Claims (3)
1. constant-power dual side-direction well measuring equipment, mainly comprise probe, it is characterized in that: described probe is combined by electronic circuit, mandrel, electrode, glass fiber reinforced plastic separation sleeve, electrode and separation sleeve are enclosed within the mandrel outside, the inner pressure balancing piston collocation structure that adopts of probe, electronic circuit partly places the probe mandrel inner, and probe electrode is drawn by high densification pin, connects by crossover sub between electrode and the circuit; The pressure balancing piston collocation structure is: at cylinder and the piston (20) of mandrel (7), electrode and separation sleeve part composition, namely be positioned at electrode A 1 ' (19), the closed chamber that forms is filled with silicone oil, and the ambient pressure of instrument internal is advanced in transmission by piston (20) transmission, when ambient pressure during greater than internal pressure, piston (20) moves inward; Along with the increase of formation temperature, the volume Yin Wendu of the interior silicone oil of cavity raises and expands, and pushing piston (20) is outwards mobile, and the interior external pressure of probe keeps autobalance.
2. constant-power dual side-direction well measuring equipment according to claim 1, it is characterized in that: upper shell (2) is threaded connection mandrel (7) upper end, there is pre-amplification circuit (4) upper shell (2) inside, outer surface cover insulation sleeve I(3), electrode A 0(16), electrode M1(15), electrode M1 ' (17), electrode M2(13), electrode M2 ' (18), electrode A 1(10), electrode A 1 ' (19), electrode A 1*(9), electrode A 1* ' (23) and separation sleeve are symmetrically distributed in mandrel (7) outside, and lower pipe nipple (25) compression by being threaded with mandrel (7) lower end, lower pipe nipple (25) and lower contact (27), all be threaded connection between lower contact (27) and the lower casing (28); Mandrel (7) upper/lower terminal realizes that by the upper sealed high pressure contact pin (6) of installing of mandrel (7) liquid air connects electrode A 0(16), electrode M1(15), electrode M1 ' (17), electrode M2(13), electrode M2 ' (18), electrode A 1(10), electrode A 1 ' (19), electrode A 1*(9) and electrode A 1* ' (23) link to each other with electronic circuit through copper bar (14), the sealed high pressure contact pin (6) of the upper distribution of mandrel (7); Electrode A 1(10) Compress Spring (11) in and lower pipe nipple (25) compress each part of the outer once mounting of mandrel (7) jointly.
3. constant-power dual side-direction well measuring equipment according to claim 2, it is characterized in that: 26 core plug seats (5) are fixed in Metallic rod (8) upper end in hollow, with pre-amplification circuit (4), electrode A 0(16), electrode M1(15), electrode M1 ' (17), electrode M2(13), electrode M2 ' (18), electrode A 1(10), electrode A 1 ' (19), electrode A 1*(9), electrode A 1* ' (23) and probe top instrument link to each other, 31 core Plug pin patch bay (12) are fixed in the bottom, link to each other with mandrel (7) internal electron circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200810001320 CN101245702B (en) | 2008-01-03 | 2008-01-03 | Constant-power dual side-direction well measuring equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200810001320 CN101245702B (en) | 2008-01-03 | 2008-01-03 | Constant-power dual side-direction well measuring equipment |
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| CN101245702A CN101245702A (en) | 2008-08-20 |
| CN101245702B true CN101245702B (en) | 2013-02-27 |
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| CN 200810001320 Expired - Fee Related CN101245702B (en) | 2008-01-03 | 2008-01-03 | Constant-power dual side-direction well measuring equipment |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101694157B (en) * | 2009-09-25 | 2012-04-18 | 中国电子科技集团公司第二十二研究所 | Method for shortening length of log tool and dual laterolog tool with electrode probe internally provided with electronic circuit |
| CN103643948B (en) * | 2013-12-16 | 2017-05-31 | 西南石油大学 | A kind of Dual-electrical azimuthal imaging logging instrument and method |
| CN105587315B (en) * | 2015-12-18 | 2019-01-15 | 杭州瑞利声电技术有限公司 | A kind of main electrode probe lateral based on soft-focus array |
| CN106761673A (en) * | 2016-12-08 | 2017-05-31 | 中国电子科技集团公司第二十二研究所 | Dual laterolog equipment |
| CN110242274B (en) * | 2019-04-16 | 2023-08-29 | 东营植诚机电技术开发有限公司 | Inner core type small-diameter resistivity measuring instrument |
| CN111350494B (en) * | 2020-03-16 | 2023-06-30 | 中国石油天然气集团有限公司 | Lateral self-adaptive constant power control method for hardware focusing array |
| CN114198097B (en) * | 2022-02-18 | 2022-06-14 | 东营仪锦能源科技有限公司 | Drilling-following type double lateral logging instrument |
| CN116291418B (en) * | 2023-05-19 | 2023-07-18 | 中海油田服务股份有限公司 | Logging instrument for electric imaging while drilling |
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| CN1712995A (en) * | 2005-07-15 | 2005-12-28 | 中国石化集团胜利石油管理局测井公司 | Logging instrument with strong focus and double side directions |
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| CN200955390Y (en) * | 2006-09-26 | 2007-10-03 | 中国海洋石油总公司 | Inductive logging instrument |
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2008
- 2008-01-03 CN CN 200810001320 patent/CN101245702B/en not_active Expired - Fee Related
Patent Citations (6)
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| CN2043271U (en) * | 1986-06-24 | 1989-08-23 | 辽河石油勘探局测井公司 | Non-linear bilateral well-prospecting instrument control equipment |
| CN1363844A (en) * | 2001-01-05 | 2002-08-14 | 新疆石油管理局测井公司 | Capacitance method for logging well and complex-resistivity well-logging instrument series |
| CN1712995A (en) * | 2005-07-15 | 2005-12-28 | 中国石化集团胜利石油管理局测井公司 | Logging instrument with strong focus and double side directions |
| CN200955389Y (en) * | 2005-12-30 | 2007-10-03 | 聂国柱 | Micro-ball-shape digital focused logging instrument |
| CN200955390Y (en) * | 2006-09-26 | 2007-10-03 | 中国海洋石油总公司 | Inductive logging instrument |
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Non-Patent Citations (1)
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| JP特开2005-308544A 2005.11.04 |
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