CN1056905C - Downhole telemetery system net of oil well - Google Patents
Downhole telemetery system net of oil well Download PDFInfo
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- CN1056905C CN1056905C CN93109120A CN93109120A CN1056905C CN 1056905 C CN1056905 C CN 1056905C CN 93109120 A CN93109120 A CN 93109120A CN 93109120 A CN93109120 A CN 93109120A CN 1056905 C CN1056905 C CN 1056905C
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- 239000003129 oil well Substances 0.000 title description 4
- 238000004891 communication Methods 0.000 claims abstract description 48
- 210000002445 nipple Anatomy 0.000 claims description 48
- 238000005259 measurement Methods 0.000 claims description 20
- 238000002955 isolation Methods 0.000 claims description 15
- 230000003287 optical effect Effects 0.000 claims description 15
- 230000005540 biological transmission Effects 0.000 claims description 13
- 230000006641 stabilisation Effects 0.000 claims description 4
- 238000011105 stabilization Methods 0.000 claims description 4
- 239000003208 petroleum Substances 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 13
- 238000013461 design Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 238000007493 shaping process Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000000977 initiatory effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000009191 jumping Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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Abstract
The present invention relates to a downhole telemetery system net of a petroleum well, which is mainly composed of a ground communication control system and an underground measuring system, wherein the ground communication control system of the telemetry system net is connected with the underground measuring system by a special-purpose seven-core cable, the ground communication control system is mainly composed of a ground communication interface circuit and a special-purpose computer, and the underground measuring system of the downhole telemetery system net is formed by the connection of a measured pup joint and a special-purpose seven-core armored cable.
Description
The present invention relates to a kind of novel electronic circuit and prolong and product, it belongs to the improvement to the real-time telemetry system of the multiple signals of oil well down-hole geophysical parameters.It mainly is to be made of several parts such as ground communications control system, special-purpose seven core cable and underground survey systems.Thereby solved preferably that the underground survey pipe nipple is many, environment temperature is high, the wiring board size is little and do not had the powerup issue of the electronic circuit under the radiating condition.
At present, the underground survey system that is adopted in petroleum industry well logging mostly is the communication modes of point-to-point, and the power supply of downhole instrument and the terminal coupling of transmission cable all are easier to solve.And adopting any measuring system still not to be reported so far at home and abroad to the communication modes of multiple spot, its power supply mode and signal transmission do not have yet and can use for reference.But some advantage to the measuring system of the communication modes of multiple spot is significantly, and is that the petroleum science and technology worker explores always and studies.
Purpose of the present invention just is to provide a kind of and both can have realized by some Communication Control and measuring circuit to multiple spot, can better solve the oil well well logging Circuits System of the powerup issue of this electronic circuit again.It mainly is made up of ground communications control system and underground survey system, the ground communications control system is connected with the underground survey system by cable, the ground communications control system mainly is to be made of ground communications interface circuit and special-purpose computer, its underground survey system then is formed by connecting by measuring pipe nipple and cable, and its major technology characteristics are:
1.. cable is seven core armored cables;
2.. the ground communications interface circuit mainly comprises: transmission line receiver, first shift register, second
Shift register, buffer register, line drive, line receiver, optical isolation board, first drive
Device, second driver and impulse circuit, first monostable circuit, second monostable circuit, the in groups
Triple monostable circuit and voltage-stabilized power supply output circuit and GND signal output apparatus; Wherein:
The transmission line receiver has two inputs and an output, and input receives and surveys from the down-hole
The measuring-signal of amount equipment, output is connected with second shift register;
Second shift register has two inputs and an output, input respectively with transmission line
Receiver is connected with the second monostable circuit output, and the input of output and buffer register mutually
Connect;
Buffer register has an input and an output, input and shift register defeated
Go out end to connection, output is connected with line drive;
Line drive has an input and an output, and input is connected with the output of buffer register, and output is connected with optical isolation board;
Optical isolation board has two inputs and three outputs, and be connected with special-purpose computer, input is connected with the output of line drive with first monostable circuit respectively, output respectively with line receiver, shift register and triple monostable circuit to being connected, its signal then is to connect successively by the line receiver and first shift register;
Line receiver has two inputs and an output, and input is connected with optical isolation board respectively, and output is connected with first shift register;
First shift register has three inputs and an output, and input is connected with the output of impulse circuit in groups with optical isolation board, line receiver respectively, and output is connected with second driver;
Second driver has an input and an output, and input is connected with first shift register, output OPADD signal;
Impulse circuit has an input and four outputs in groups, and input is connected with triple monostable circuit, and output is connected with first monostable circuit, second monostable circuit, first shift register and first driver respectively;
First driver has an input and an output, and input is connected the output clock signal with impulse circuit in groups;
First monostable circuit has an input and an output, and input is connected with impulse circuit in groups, and output is connected with optical isolation board;
Second monostable circuit has an input and an output, and input is connected with impulse circuit in groups, and output is connected with second shift register;
Triple monostable circuit has an input and an output, and input is connected with optical isolation board, and output impulse circuit in groups is connected;
Voltage-stabilized power supply is exported three power supplys respectively by overcurrent protection and warning device, i.e. first power supply, second source and the 3rd power supply;
The GND signal is directly ground connection output then.3.. the measurement pipe nipple of said underground survey system comprises measuring circuit and communicating circuit, the output of its communicating circuit and seven core armored cables are in parallel, the communication interface circuit of this seven cores armored cable and ground communications control system mainly comprises to being connected: communication and control circuit, intermittent power supply power supply stabilization circuit, power supply mu balanced circuit, data acquisition circuit and sensor and data transmitter continuously; Wherein:
Communication and control circuit have five inputs and two outputs, and input is connected with clock signal, address signal, GND signal and two power supplys respectively, and output is connected with continuous power supply mu balanced circuit with data acquisition circuit respectively;
Data acquisition circuit has five inputs and an output, and input is connected with control circuit with three-way power, sensor and communication from continuous power supply mu balanced circuit respectively, and output then is connected with data transmitter;
The intermittent power supply power supply stabilization circuit has two inputs and two outputs, and input is connected with second source with first power supply respectively, and output is connected with control circuit with communication;
The power supply mu balanced circuit has four inputs and three outputs continuously, and input is connected with control circuit with first power supply, second source, the 3rd power supply and communication respectively, and output then is connected with data acquisition circuit;
Data transmitter has an input and two outputs, and input is connected with data acquisition circuit, and output is the communication interface circuit output signal earthward.
Accompanying drawing 1 is terrestrial interface schematic block circuit diagram of the present invention.
Accompanying drawing 2 is the schematic block circuit diagram of underground survey pipe nipple of the present invention.
Accompanying drawing 3 is ground communications interface circuit schematic diagram of the present invention.
Accompanying drawing 4 is measurement pipe nipple circuit theory diagrams of the present invention.
Accompanying drawing 5 is on-the-spot installation the of the present invention schematic diagram is set.
Accompanying drawing 6 is seven core cable cut-away view of the present invention.
： 1-- 2-- 3-- 4-- 5-- 6-- 7-- 8-- 9-- 10-- 11--A 12---12V13-- 14--+5V 15-- 16--B17--+12V 18-- 19--20-- 21-- 22-- 23---24-- 25-- 26--27-- 28-- 29-- 30-- 31-- 32-- 33--34-- 35-- 36--37-- 38-- 39-- 40--41-- 42-- 43--44-- 45-- 46--47-- 48--
The code name content of each integrated circuit is in the accompanying drawing 3: the code name content of each integrated circuit is in the U1--555 U2.1--74LS112 U2.2--74LS112 U3--74LS193U4.1--74LS123 U4.2--74LS123 U5--MC3436 U6--4N25U7--74LS164 U8--74LS164U U9--74LS374 U10---74LS374U11--74LS244 U12--74LS244 U13--74LS165 U14---74LS165U15---74LS244 U16---74LS123 U17---AD518 U18---AD518 accompanying drawing 4: U3--4015 U4:A--4013 U4:B--4013 U5-4585 U6-4585U9:A--4098 U9:B----4098 U10:A--4098 U10:B-4098U12--CD4010 U13--4C10 U14--CD4010 U15--SN5513U16--AD518 U17--AD518 U18--AD518 U19--AD518U20--AD1512 U21--LM317L U22--LM317 U23--LM337U24--LM317 U25--LM317 U26--LM317
Come concrete circuit of the present invention is described in detail below in conjunction with drawings and Examples: (one). the ground communications interface circuit
Accompanying drawing 3 is ground communications interface circuit schematic diagrams of the present invention, and it is that theory diagram by accompanying drawing 1 designs.The ground communications interface is the bridge that connects computer and underground survey pipe nipple, when work, initiating signal from computer is latched into the underground survey pipe nipple geocoding on the data conveyer line in first shift register, initiating signal starts pulse-generating circuit in groups simultaneously, exports continuous 12 clock pulses.This clock pulses has three effects: the one, and synchronizing clock signals is provided for the underground survey pipe nipple through first driver; The 2nd, the displacement of the address code in first shift register is outputed to down-hole address bus ADRESS; The 3rd, as the synchronizing clock signals of second shift register, the data that transmit from the down-hole are simultaneously moved into second shift register.After 12 clock signals of pulse-generating circuit output in groups, through end signal of monostable 1 generation, the data of notice computer measurement pipe nipple have transmitted and have finished, and are outputed on the data/address bus by line drive.Transmission line receiver among its figure is to be made of U5, monostable 1 constitutes monostable 2 by U4 is made of U4, monostable 3 Queensland are made of U16, pulse-generating circuit is made of U1, U2, U3 in groups, second shift register is made of U7, U8, buffer register is made of U9, U10, line drive is made of U11, U12, line receiver is made of U15, first shift register is made of U13, U14, first driver is made of U17, T1, T2, and second driver is made of U18, T3, T4, and T5, U6, T6 constitute optical isolation board and waveform shaping circuit.(2). underground survey pipe nipple circuit
Accompanying drawing 4 is a kind of schematic block circuit diagram of measurement pipe nipple of the present invention, and it is that theory diagram by accompanying drawing 2 designs.It is respectively measured between the circuit theory diagrams of pipe nipple except that individual parameters slightly the difference, and circuit is all identical.Cable 1#～Cable 7# in the accompanying drawing 4 links with seven cable cores of armouring seven core cable respectively, and the ground wire of Circuits System then links with the steel crust of armored cable.Among the figure two, U1, U2 are integrated transporting discharging, and U3～U14 is the cmos digital integrated circuit, are all powered by continuous power supply U25, U26; U15～U21 is then by intermittent power supply power supply U22～U24 power supply.During system works, from the synchronizing signal of the clock of cable core 3# and from the address gating signal of cable core 5# respectively through Schmidt circuit U2, U1 and D6, R6, D5, R5 shaping, obtain the clock signal and the address signal of waveform rule.Clock and address signal are delivered to eight bit strings simultaneously and are arrived and shift register U3, with the latch address signal.Address signal that is latched and address are provided with the set address signal of switch U7 and deliver to eight equality comparator U5, U6 simultaneously and compare.If two addresses are identical, then high level signal of comparator U6 output represent that this measurement pipe nipple is selected, otherwise U6 still keeps output low level.U6 output high level signal has four effects: the one, and startup intermittently power supply U22～U24 is started working, and exports normal supply voltage, and the 2nd, by U11:A and U10:B, the work of starting A/D converter; The 3rd, enter U3 through U9:A, to guarantee that comparator U6 output is constant during measuring; The 4th, open differential lines driver U15, make by high-impedance state and be transformed into the transmission attitude.When ground when the underground survey pipe nipple sends address gating signal (also not the arbitrary measurement pipe nipple in gating down-hole) once more, measured parameter P transmits earthward through electronic switch U20, amplifier U17, A/D converter U16, line drive U15.Because A/D converter is operated under the external clock mode, so the data that pass are synchronous with the clock signal from ground.Measure parameter P, A/D converter U16 exports an EOC pulse signal, postpones through monostable circuit U10:A, exports a undersuing.This negative pulse makes trigger U4 change output state on the one hand, so that single-pole double throw electronic switch U20 switches to parameter T; On the other hand, this negative pulse starts A/D converter U16 again and starts working by U11:A, U10:B.When measuring the end of T parameter, one of trigger U4:A output is gone up jumping and is dashed along the pulse, and this pulse is through negative pulse of monostable circuit U9:B output, this negative pulse makes the U3 zero clearing through U8:A, cause comparator U6 output low level at last, force intermittently that power supply quits work, output has only the voltage of 1.2V.The work schedule of entire circuit is provided by figure three.
The effect of U4:B, U9:A is when the address gating signal that receives is the address of non-measurement pipe nipple, produces a reset signal (highest order of supposing the stage signal is 1) automatically, in order to avoid falsely dropped.
U13, U14, U15 are level translator, realize the conversion of CMOS operation level to the TTL operation level.
U1, U2 are connected into the form of Schmidt trigger, realize the purpose of waveform shaping.Owing to be connected to diode D1～D4 and potentiometer W1～W4, when regulator potentiometer, two upper and lower triggering levels of Schmidt trigger all can be regulated.The purpose of doing so mainly is to consider the measurement pipe nipple of diverse location, because clock lock-out pulse and address strobe pulse and whole system are total to ground wire, and cause when datum is offset, but the free adjustment triggering level is provided with.
U22～U24 and T1～T3 constitutes the main body of intermittent power supply power supply, when the triode saturation conduction, is output as 1.2V, and when triode ended, 1.2V till the output voltage * (1+2.7K/0.3K), all the other two principles were identical.
In actual design with in using, designer of the present invention is that the theory diagram according to accompanying drawing 1 is designed to ground communications interface circuit as shown in Figure 3, and configuration corresponding calculated machine; Be designed to the communication and the power supply circuits of measurement pipe nipple as shown in Figure 4 by the theory diagram of accompanying drawing 2, and be made into 10 measurement pipe nipples, each circuit board and corresponding device of measuring pipe nipple is placed on an internal diameter 2cm, long 80cm with in the interior stainless steel cylinder; The setting of seven cables in its seven cores armored cable and then is measured pipe nipples and is in parallel with 10 respectively as shown in Figure 5, installs according to the scene of accompanying drawing 6 at last schematic diagram to be set each several part is arranged on oil wells in field.Like this, address gating signal is powered, sent to computer by control ground communications interface to the measurement pipe nipple of down-hole, and receive the data of passing back from the underground survey pipe nipple.The down-hole is respectively measured pipe nipple and is connected in parallel on the cable with bus mode, and the down-hole is respectively measured the pipe nipple circuit and is divided into two parts: a part is a communicating circuit, is used to receive the address gating signal from ground; Another part is a measuring circuit, is used under the measuring well electrical quantity and sends measurement result earthward.Whether during system works, ground-based computer sends address gating signal by the ground communications interface to the underground survey pipe nipple, and the down-hole is respectively measured pipe nipple and received this address gating signal simultaneously, and decoding, selected to determine this pipe nipple.Selected measurement pipe nipple is given the measuring circuit and the data transmit circuit power supply of this pipe nipple immediately.Because the ground communications interface is respectively measured pipe nipple with the down-hole and is synchronoused working under same pulse clock, so at computer for the second time when the underground survey pipe nipple sends address gating signal, previous selected pipe nipple sent measurement result immediately earthward, and such both-way communication right and wrong are finished simultaneously.In the inferior while, selected pipe nipple enters and measures the transmission preparations stage again immediately to relative section power supply, and finishes the measuring circuit of pipe nipple of measurement task and the power supply of data transmit circuit will be cut off automatically.System works under such endless form with regard to right and wrong.
For the assurance system can continuous operation under 60 ℃ the environment temperature more than 12 hours, it is necessary selecting military products electronic device and strict screening electronic component for use.
Because ground communications interface circuit of the present invention is meticulous optimal design, so it has following characteristics and good effect:
1. adopt synchronous full duplex communication mode, both simplified the design of the measurement pipe nipple clock recovery circuitry of underground survey system, improved the transmission communication transmission rate of whole system again.
2. adopt differential transfer line receiver U5 and photoelectric isolating device U6, improved the ability of the anti-common mode disturbances of receiver, suppressed cross talk effects between the line on the transmission cable effectively.
3. adopt push-pull output circuit as CLOCK and ADDRESS driver, improved the driving force of circuit.
4. constitute characteristic pulse-generating circuit by U1, U2, U3.
In addition, adopt the product of measurement pipe nipple circuit of the present invention manufacturing to have following characteristics:
1. the underground survey pipe nipple has solved preferably to the big intermittent power supply method that device adopted of power consumption that the underground survey pipe nipple is many, environment temperature is high, the wiring board size is little and has not had the powerup issue of the electronic circuit under the radiating condition.
2. be of a size of on the wiring board that 2cm is wide, 80cm is long owing to the measurement pipe nipple is arranged on, and be placed in the stainless cylinder of internal diameter 2cm, so be very beneficial for the site operation operation.
3. each is measured pipe nipple and once can measure two parameters, and one is the analog signal of 0～5V, and one is 90 ohm～150 ohm resistance.
4. the bus type connected mode that is adopted makes the underground survey pipe nipple more freely to increase and decrease, and the distance between pipe nipple also can be adjusted arbitrarily, and the operate as normal method of system is not all had influence.In addition, a fault of measuring pipe nipple generally also can not influence the operate as normal of other pipe nipple, thereby has reduced the maintenance cost of native system widely.
5. have under the situation of 10 measurement pipe nipples in the down-hole, system's per second can circulate and measure more than 100 times.
6. can be under the ambient conditions of 60 ℃ of well temperature continuous operation more than 12 hours.
Claims (1)
- One kind the well logging Circuits System, it is made up of ground communications control system and underground survey system, the ground communications control system is connected with the underground survey system by cable, the ground communications control system is to be made of ground communications interface circuit and special-purpose computer, its underground survey system then is formed by connecting by measuring pipe nipple and cable, it is characterized in that:1.. said cable is seven core armored cables;2.. said ground communications interface circuit mainly comprises: transmission line receiver, first shift register, second shift register, buffer register, line drive, line receiver, optical isolation board, first driver, second driver reach impulse circuit, first monostable circuit, second monostable circuit, triple monostable circuit and voltage-stabilized power supply output circuit and GND signal output apparatus in groups; Wherein:The transmission line receiver has two inputs and an output, and input receives the measuring-signal from underground survey equipment, and output is connected with second shift register;Second shift register has two inputs and an output, and input is connected with the second monostable circuit output with the transmission line receiver respectively, and output is connected with the input of buffer register;Buffer register has an input and an output, and the output of input and shift register is to being connected, and output is connected with line drive;Line drive has an input and an output, and input is connected with the output of buffer register, and output is connected with optical isolation board;Optical isolation board has two inputs and three outputs, and be connected with special-purpose computer, input is connected with the output of line drive with first monostable circuit respectively, output is connected with line receiver, shift register and triple monostable circuit respectively, and its signal then is to connect successively by the line receiver and first shift register;Line receiver has two inputs and an output, and input is connected with optical isolation board respectively, and output is connected with first shift register;First shift register has three inputs and an output, and input is connected with the output of impulse circuit in groups with optical isolation board, line receiver respectively, and output is connected with second driver;Second driver has an input and an output, and input is connected with first shift register, output OPADD signal;Impulse circuit has an input and four outputs in groups, and input is connected with triple monostable circuit, and output is connected with first monostable circuit, second monostable circuit, first shift register and first driver respectively;First driver has an input and an output, and input is connected the output clock signal with impulse circuit in groups;First monostable circuit has an input and an output, and input is connected with impulse circuit in groups, and output is connected with optical isolation board;Second monostable circuit has an input and an output, and input is connected with impulse circuit in groups, and output is connected with second shift register;Triple monostable circuit has an input and an output, and input is connected with optical isolation board, and output impulse circuit in groups is connected;Voltage-stabilized power supply is exported three power supplys respectively by overcurrent protection and warning device, i.e. first power supply, second source and the 3rd power supply;The GND signal is directly output then;3.. the measurement pipe nipple of said underground survey system comprises measuring circuit and communicating circuit, the output of its communicating circuit and seven core armored cables are in parallel, the communication interface circuit of this seven cores armored cable and ground communications control system is to being connected, and it comprises: communication and control circuit, intermittent power supply power supply stabilization circuit, power supply mu balanced circuit, data acquisition circuit and sensor and data transmitter continuously; Wherein:Communication and control circuit have five inputs and two outputs, and input is connected with clock signal, address signal, GND signal and two power supplys respectively, and output is connected with continuous power supply mu balanced circuit with data acquisition circuit respectively;Data acquisition circuit has five inputs and an output, and input is connected with control circuit with three-way power, sensor and communication from continuous power supply mu balanced circuit respectively, and output then is connected with data transmitter;The intermittent power supply power supply stabilization circuit has two inputs and two outputs, and input respectivelyBe connected with second source with first power supply, output is connected with control circuit with communication;The power supply mu balanced circuit has four inputs and three outputs continuously, and input is connected with control circuit with first power supply, second source, the 3rd power supply and communication respectively, and output then is connected with data acquisition circuit;Data transmitter has an input and two outputs, and input is connected with data acquisition circuit, and output is the communication interface circuit output signal earthward.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN93109120A CN1056905C (en) | 1993-07-31 | 1993-07-31 | Downhole telemetery system net of oil well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN93109120A CN1056905C (en) | 1993-07-31 | 1993-07-31 | Downhole telemetery system net of oil well |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1098471A CN1098471A (en) | 1995-02-08 |
| CN1056905C true CN1056905C (en) | 2000-09-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN93109120A Expired - Fee Related CN1056905C (en) | 1993-07-31 | 1993-07-31 | Downhole telemetery system net of oil well |
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| Country | Link |
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| CN (1) | CN1056905C (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1088143C (en) * | 1999-10-01 | 2002-07-24 | 石油大学(华东) | Serial telemetry bus of downhole instruments for petroleum logging and its interface technique |
| CN101477366B (en) * | 2009-02-10 | 2012-05-02 | 中国海洋石油总公司 | Remote control well testing system |
| CA2918730A1 (en) * | 2013-08-19 | 2015-02-26 | Halliburton Energy Services, Inc. | Evaluating wellbore telemetry systems |
| CA2991330C (en) * | 2015-08-03 | 2020-04-21 | Halliburton Energy Services, Inc. | Electromagnetic telemetry using capacitive electrodes |
| CN105672979B (en) * | 2015-12-28 | 2018-05-15 | 西安弘传科技开发有限责任公司 | The cut-in method of 7 core armored cables of well logging |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3807227A (en) * | 1972-07-17 | 1974-04-30 | Texaco Inc | Methods for thermal well logging |
| US4033186A (en) * | 1976-08-06 | 1977-07-05 | Don Bresie | Method and apparatus for down hole pressure and temperature measurement |
| US4161782A (en) * | 1977-12-23 | 1979-07-17 | Otis Engineering Corporation | Microprocessor computerized pressure/temperature/time down-hole recorder |
| CN85202621U (en) * | 1985-06-27 | 1986-12-24 | 冶金工业部中南冶金地质勘探公司六零七队 | Device for assaying drilling pressure |
| CN2039740U (en) * | 1988-10-15 | 1989-06-21 | 辽河石油勘探局科学技术研究院 | Temp. and pressure simultaneously measuring instrument |
| US5163321A (en) * | 1989-10-17 | 1992-11-17 | Baroid Technology, Inc. | Borehole pressure and temperature measurement system |
-
1993
- 1993-07-31 CN CN93109120A patent/CN1056905C/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3807227A (en) * | 1972-07-17 | 1974-04-30 | Texaco Inc | Methods for thermal well logging |
| US4033186A (en) * | 1976-08-06 | 1977-07-05 | Don Bresie | Method and apparatus for down hole pressure and temperature measurement |
| US4161782A (en) * | 1977-12-23 | 1979-07-17 | Otis Engineering Corporation | Microprocessor computerized pressure/temperature/time down-hole recorder |
| CN85202621U (en) * | 1985-06-27 | 1986-12-24 | 冶金工业部中南冶金地质勘探公司六零七队 | Device for assaying drilling pressure |
| CN2039740U (en) * | 1988-10-15 | 1989-06-21 | 辽河石油勘探局科学技术研究院 | Temp. and pressure simultaneously measuring instrument |
| US5163321A (en) * | 1989-10-17 | 1992-11-17 | Baroid Technology, Inc. | Borehole pressure and temperature measurement system |
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| Publication number | Publication date |
|---|---|
| CN1098471A (en) | 1995-02-08 |
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