CN104141487A - Circuit for improving vibration resistance of underground inclinometer by means of load impedance characteristic - Google Patents

Circuit for improving vibration resistance of underground inclinometer by means of load impedance characteristic Download PDF

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CN104141487A
CN104141487A CN 201410367764 CN201410367764A CN104141487A CN 104141487 A CN104141487 A CN 104141487A CN 201410367764 CN201410367764 CN 201410367764 CN 201410367764 A CN201410367764 A CN 201410367764A CN 104141487 A CN104141487 A CN 104141487A
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acceleration sensor
inclinometer
load impedance
acceleration
signal
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CN 201410367764
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Chinese (zh)
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CN104141487B (en
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朱晓岭
王肄辉
王小虎
刘海
熊陵
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中天启明石油技术有限公司
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Abstract

The invention discloses a circuit for improving the vibration resistance of an underground inclinometer by means of a load impedance characteristic. The circuit comprises three acceleration sensor signal conditioning units, a multi-channel electronic switch, a signal amplifier and an analog-digital conversion chip, the input end of each acceleration sensor signal conditioning unit is connected with the output end of an acceleration sensor corresponding to the corresponding acceleration sensor signal conditioning unit, the output ends of the acceleration sensor signal conditioning units are correspondingly connected with the multi-channel electronic switch one by one, the acceleration sensors are mainly used for measuring tool face parameters of the underground inclinometer, and the multi-channel electronic switch, the signal amplifier and the analog-digital conversion chip are connected in sequence. According to the circuit, output load impedance of the three high-sensitivity acceleration sensors can be changed, measurement signals are undistorted when the acceleration sensors are used for measuring dynamic acceleration, the measurement accuracy is guaranteed, and the vibration resistance of the inclinometer is also improved.

Description

一种利用负载阻抗特性提高井下测斜仪抗震性能的电路 Circuit utilizing load impedance characteristics are improved downhole seismic performance inclinometer

技术领域 FIELD

[0001] 本发明涉及石油随钻测井系统中井下测斜仪的传感器技术领域,尤其是指一种利用负载阻抗特性提高井下测斜仪抗震性能的电路。 [0001] The present invention relates to the field of oil well logging while drilling sensor technology downhole inclinometer system, in particular a downhole seismic performance of the circuit inclinometer means utilizing load impedance characteristics are improved.

背景技术 Background technique

[0002] 业内习知,在石油随钻测井系统中使用测斜仪传感器技术测量仪器在井下定位是十分必要的,定位参数主要有井斜、方位和工具面。 [0002] The conventional industry, the use of the inclinometer measuring instruments in a downhole sensor technology positioning is necessary in oil logging while drilling system, mainly targeting parameters inclination, azimuth and tool face. 传感器的测量精度直接影响测斜仪的定向参数性能,现场作业时,井下强烈震动环境严重影响传感器测量精度,要准确地测量定向参数,关键措施之一是提高传感器的抗震性能及输出测量信号的处理电路,现提出改变加速度传感器负载阻抗的方案实现信号无失真处理,进而提高了测斜仪的抗震性能。 The measurement accuracy of the sensor orientation parameters directly affect the performance of the inclinometer, when field operations, downhole strong vibration environment seriously affect the measurement accuracy of the sensor to accurately measure the orientation parameters, one of the key measures is to improve the seismic performance of the measurement signal and the output of the sensor a processing circuit are proposed to change the load impedance of the acceleration sensor embodiment for signal processing without distortion, thus improving the performance of the seismic inclinometer.

发明内容 SUMMARY

[0003] 本发明的目的在于克服现有技术的不足与缺点,提供一种利用负载阻抗特性提高井下测斜仪抗震性能的电路,能够根据井下震动环境的变化改变负载阻抗,利用负载阻抗特性提高井下测斜仪的抗震性能。 [0003] The object of the present invention is to overcome the deficiencies and disadvantages of the prior art, a circuit utilizing load impedance characteristics are improved downhole seismic performance of the inclinometer, the load impedance can be changed according to changes in the environment of a downhole vibrations, load impedance characteristics are improved by using downhole seismic performance inclinometer.

[0004] 为实现上述目的,本发明所提供的技术方案为:一种利用负载阻抗特性提高井下测斜仪抗震性能的电路,它包括有三个加速度传感器信号调理单元、多通道电子开关、信号放大器、模拟数字转换芯片,每个加速度传感器信号调理单元的输入端与各自相应的加速度传感器的输出端连接,其输出端与多通道电子开关对应相接,所述加速度传感器主要测量井下测斜仪的工具面参数,所述多通道电子开关、信号放大器、模拟数字转换芯片依次连接;其中,每个加速度传感器信号调理单元均包括有旁路电容、限流电阻以及用于将加速度传感器输出的电流信号转换为电压信号的采样电阻,所述旁路电容和采样电阻相互并联,其一端接地,且并联后串联有限流电阻,所述旁路电容和限流电阻构成了加速度传感器的负载,形成有负载阻抗,且呈现的负载阻抗能 [0004] To achieve the above object, the technical solution of the present invention provides: utilizing load impedance characteristic improvement circuit downhole seismic performance inclinometer, comprising an acceleration sensor has three signal conditioning unit, a multi-channel electronic switches, a signal amplifier analog to digital converter chip, the input of each of the acceleration sensor signal conditioning unit with the respective corresponding output of the acceleration sensor is connected to its output corresponding to the multi-channel electronic switching contact, the acceleration sensors are measuring downhole inclinometer tool face parameters, the multi-channel electronic switching, a signal amplifier, an analog to digital conversion chip are sequentially connected; wherein each of the acceleration sensor signal conditioning means includes a bypass capacitor, the limiting resistor and a current signal output from the acceleration sensor sampling resistor is converted to a voltage signal, the bypass capacitor and the sampling resistor connected in parallel, one end of which is grounded, and the series limiting resistor connected in parallel, the bypass capacitor and the load limiting resistor constituting an acceleration sensor, a load is formed impedance and load impedance can be presented 随加速度传感器加测量信号的变化而变化。 It varies with the applied measurement signal of the acceleration sensor.

[0005] 所述旁路电容和采样电阻之间串联有电感,所述旁路电容、电感和限流电阻构成加速度传感器的负载,能够改变加速度传感器的负载阻抗,其阻抗公式如下: [0005] The inductance is connected in series between the sense resistor and a bypass capacitor, the bypass capacitor, an inductor and the load limiting resistor constituting the acceleration sensor, an acceleration sensor capable of changing the load impedance, the impedance of the following formula:

[0006] Z,.^ JwC1 +—~^7-1=l,2,3 [0006] Z, ^ JwC1 + -. ~ ^ 7-1 = l, 2,3

R + JwLi R + JwLi

[0007] 式中,j为虚数;w为角速度,是信号频率f的2 倍Ki为旁路电容值,R为限流电值,Li为电感值。 [0007] In the formula, j is an imaginary number; W is the angular velocity, f is the signal frequency is twice the value of Ki of the bypass capacitor, R is the current limit value, Li is the inductance value.

[0008] 它还包括有三个磁信号调理单元,每个磁信号调理单元的输入端与各自相应的磁场强度传感器的输出端连接,其输出端与多通道电子开关对应相接,所述磁场强度传感器主要测量井下测斜仪的方位参数。 [0008] There are three further comprising a magnetic signal conditioning unit, the input of each of the magnetic signal conditioning unit and a respective output terminal of the magnetic field strength sensor is connected to an output terminal of the electronic switch corresponding to a multi-channel contact, said magnetic field strength the main parameters of the downhole sensor measuring an azimuth inclinometer.

[0009] 所述多通道电子开关在任意时刻仅选通输出其中的一路。 [0009] The multi-channel electronic switching at an arbitrary time selected by merely output one of them.

[0010] 本发明与现有技术相比,具有如下优点与有益效果: [0010] Compared with the prior art the present invention has the following advantages and beneficial effects:

[0011] 1、可改变三件高灵敏度的加速度传感器输出负载阻抗,使它们在测量动态加速度时测量信号无失真,保证了测量精度,也提高了测斜仪的抗震性能; [0011] 1, can be changed three high sensitivity of the acceleration sensor output load impedance, so that they measure the signal without distortion when measuring the dynamic acceleration, ensure the accuracy, but also improves the seismic performance of the inclinometer;

[0012] 2、可以对加速度传感器输出信号进行低通滤波和去噪声处理,改善信号质量; [0012] 2, may be low pass filtering and denoising process on the acceleration sensor output signal, improving the signal quality;

[0013] 3、本电路特别适用于井下复杂环境下测量仪器的井斜、方位、工具面等参数,可在高温125°C环境下稳定工作。 [0013] 3, this circuit is particularly suitable for downhole parameters inclination complex environment measurement instrument, azimuth, tool face, etc., stability at high temperatures can be 125 ° C environment.

附图说明 BRIEF DESCRIPTION

[0014] 图1为本发明电路的原理图。 [0014] Figure 1 is a schematic diagram of the inventive circuit.

[0015] 图2为加速度传感器Gl结合去掉电感LI的加速度传感器信号调理单元的示意图。 [0015] FIG. 2 is a schematic remove inductance LI of the acceleration sensor signal conditioning unit, an acceleration sensor Gl binding.

[0016] 图3为加速度传感器Gl的工作信号不意图。 [0016] FIG. 3 is an acceleration sensor signal Gl is not intended to work.

具体实施方式 Detailed ways

[0017] 下面结合具体实施例对本发明作进一步说明。 [0017] The following embodiments in conjunction with specific embodiments of the present invention will be further described.

[0018] 如图1所示,本实施例所述的利用负载阻抗特性提高井下测斜仪抗震性能的电路,包括: [0018] 1, using the embodiment of the load impedance characteristic improvement circuit embodiment of the present downhole seismic performance inclinometer, comprising:

[0019] 三个加速度传感器信号调理单元,利用负载阻抗随震动频率变化实现三个加速度传感器Gl、G2、G3在强震环境下保证了测量精度,提高井下测斜仪的抗震性能; [0019] The three acceleration sensor signal conditioning unit, using the load impedance variation with frequency of vibration to achieve three acceleration sensors Gl, G2, G3 strong earthquake environment ensure the accuracy and improve seismic performance downhole inclinometer;

[0020] 三个磁信号调理单元MC1、MC2、MC3,用于确保三个磁场强度传感器M1、M2、M3的测量精度; [0020] The three magnetic signal conditioning means MC1, MC2, MC3, to ensure measurement accuracy of the three magnetic field strength sensors M1, M2, M3 of;

[0021] 多通道电子开关U1,输入六通道传感器信号,任意时刻仅选通输出其中的一路; [0021] Multi-channel electronic switches U1, six-channel sensor input signal, at any time only the gate output all the way therein;

[0022] 信号放大器U2,对选通后的信号进行放大处理; [0022] The signal amplifier U2, the gate signal enlargement processing;

[0023] 模拟数字转换芯片U3,将放大后的传感器模拟信号转换为数字信号。 [0023] The analog-digital converter chip U3, the amplified analog sensor signal into a digital signal.

[0024] 其中,所述三个加速度传感器信号调理单元的输入端分别与三个加速度传感器G1、G2、G3的输出端一一对应相接,其输出端则与多通道电子开关Ul —一对应相接,所述三个加速度传感器Gl、G2、G3主要测量井下测斜仪的工具面参数;所述三个磁信号调理单元MC1、MC2、MC3的输入端分别与三个磁场强度传感器M1、M2、M3的输出端一一对应相接,其输出端则与多通道电子开关Ul —一对应相接,所述三个磁场强度传感器M1、M2、M3主要测量井下测斜仪的方位参数;所述多通道电子开关U1、信号放大器U2、模拟数字转换芯片U3依次连接。 [0024] wherein the input of the three acceleration sensors and the signal conditioning units are three acceleration sensors G1, G2, G3, one-phase output terminal, and an output terminal with a multichannel electronic switch Ul - corresponds to a phase, the three acceleration sensors Gl, G2, G3 main measurement parameter downhole tool face inclinometer; the three magnetic signal conditioning means MC1, MC2, MC3 of the three input terminals of the magnetic field strength sensors M1, M2, M3, one-phase output terminal, and an output terminal with a multichannel electronic switch Ul - a phase corresponding to the three magnetic field strength sensors Ml, M2, M3 main orientation parameters measured downhole inclinometer; the multi-channel electronic switches U1, a signal amplifier U2, U3 chip analog to digital converter connected in sequence.

[0025] 在本实施例中,每个加速度传感器信号调理单元均包括有旁路电容、限流电阻、电感以及用于将加速度传感器输出的电流信号转换为电压信号的采样电阻,如图1所示,Cl〜3是旁路电容,LI〜3是电感,Rl〜3是采样电阻,其中,在每个加速度传感器信号调理单元中,所述旁路电容和采样电阻相互并联,且其一端接地,并联后串联有限流电阻,所述电感串联在旁路电容和采样电阻之间;所述旁路电容、电感和限流电阻构成了加速度传感器的负载,震动环境的变化引起加速度传感器测量信号的变化,为加速度传感器设计的负载呈现的阻抗不是固定值,该值随加速度传感器测量信号的变化而变化,抑制了因强烈震动引起加速度传感器输出信号的失真,在震动强度变化剧烈的工况下,亦能保证加速度传感器的测量精度,进而提高了测斜仪的抗震性能,其 [0025] In the present embodiment, each of the acceleration sensor signal conditioning means includes a bypass capacitor, a current limiting resistor, an inductor and a current acceleration sensor output signal is converted to a voltage signal sampling resistor, as a shown, Cl~3 a bypass capacitor, LI~3 inductance, Rl~3 sampling resistor, wherein, in each of the acceleration sensor signal conditioning unit, the bypass capacitor and the sampling resistor connected in parallel, and grounded at one end thereof after a series limiting resistor connected in parallel, connected in series between the inductor and the bypass capacitor sampling resistor; the bypass capacitor, an inductor and the load limiting resistor constitutes an acceleration sensor, vibration due to changes in the environment of the measurement signal of the acceleration sensor change, an acceleration sensor designed load impedance presented not a fixed value, the measured value changes with the acceleration sensor signal changes, the distortion is suppressed by the strong vibration caused by the acceleration sensor output signal, change in the intensity of severe vibration conditions, can guarantee the measurement accuracy of the acceleration sensor, thereby improving the seismic performance of the inclinometer, which 抗公式如下: Anti-formula is as follows:

[0026] Z,.= jwC: + n \ ri=12 3 [0026] Z, = jwC:. + N \ ri = 12 3

R + JWLj R + JWLj

[0027] 式中,j为虚数;w为角速度,是信号频率f的2 倍Ki为旁路电容值,R为限流电值,Li为电感值。 [0027] In the formula, j is an imaginary number; W is the angular velocity, f is the signal frequency is twice the value of Ki of the bypass capacitor, R is the current limit value, Li is the inductance value.

[0028] 负载阻抗构成的变化情况如下表I所示。 Changes [0028] The configuration of a load impedance are shown in Table I.

[0029] 表1-负载阻抗变化表 [0029] Table 1 - Table load impedance variation

[0030] [0030]

加速度值G (t) j负载阻抗ZG(t) = Gr Z = Z0 直流常量 Acceleration value G (t) j load impedance ZG (t) = Gr Z = Z0 constant DC

0<G(t) <Gth Z = Zi 交流变量 0 <G (t) <Gth Z = Zi AC variable

G(t)>GTH Z = Zi 信号失真 G (t)> GTH Z = Zi signal distortion

[0031] 当然,去掉图1中的电感LI〜3后的加速度传感器信号调理单元,同样也可以起到改善抗震性能的目的,如图2所示。 [0031] Of course, after removal of the inductor LI~3 FIG acceleration sensor signal conditioning unit, also may serve the purpose of improving earthquake resistance, as shown in FIG. 无论是否去掉电感LI〜3,本电路的适应范围包括所有利用阻抗特性改善测斜仪抗震性能的情况。 Whether removed inductor LI~3, the scope of the adaptation circuit comprises the impedance characteristics are improved in all cases inclinometer seismic performance.

[0032] 下面我们以加速度传感器Gl为例对本电路的原理进行详细说明,其具体情况如下: [0032] Here we have an example of an acceleration sensor Gl principles of the present circuit will be described in detail, as specified below:

[0033] 当加速度传感器Gl静止测量时,Gl测量输出电流为一恒定值,旁路电容Cl相当于开路,电感LI相当于短路,此时Gl的负载阻抗为Z1 = 1/R,电流经采样电阻Rl转换为恒定电压,输出信号表现为直流常量值;当加速度传感器Gl经受剧烈震动时,Gl的负载阻抗 [0033] When the acceleration sensor is stationary measuring Gl, Gl measuring the output current at a constant value, corresponding to the open bypass capacitor Cl, corresponding to a short-circuit inductance LI, Gl this time the load impedance is Z1 = 1 / R, the sampled current resistor Rl is converted into a constant voltage, the output signal appears as a DC constant value; when the acceleration sensor is subjected to severe vibration Gl, Gl load impedance

Gl测量输出变化的电流经采样电阻Rl转换为变化的电压信号,由于旁路电容Cl和电感LI的作用,Gl的负载阻抗中含变量W,故能够改善输出的测量信号质量。 Gl via current sampling resistor Rl changes in the measured output voltage signal is converted to a change due to the effect of LI bypass capacitors Cl and inductive load impedance variable containing the Gl W, it is possible to improve the quality of the output of the measuring signal.

[0034] 如图3所示,本图给出了上述案例的加速度传感器Gl信号变化,其中,加速度传感器Gl输出电流信号为i,流过旁路电容Cl的电流为I1,流过电感LI的电流为i2,流过采样电阻Rl的电流为i3 ;当静止测量时,I1 = O, i2 = i3 ;当震动条件下测量时,i = ii+i2, [0034] 3, this figure shows the change of the signal of the acceleration sensor case Gl, wherein Gl output current signal of the acceleration sensor is i, the current flowing through the bypass capacitor Cl is I1, flowing through the inductor LI is current i2, the current flowing through the sense resistor Rl is I3; when static measurement, I1 = O, i2 = i3; when measured under conditions of vibration, i = ii + i2,

ii ^ O, i2 = i3。 ii ^ O, i2 = i3.

[0035] 以上所述之实施例子只为本发明之较佳实施例,并非以此限制本发明的实施范围,故凡依本发明之形状、原理所作的变化,均应涵盖在本发明的保护范围内。 [0035] The above-described embodiment is only an example of the preferred embodiment of the present invention, in order not to limit the scope of the present invention, so any changes in shape under this invention, the principle made, should fall in the protection of the present invention range.

Claims (4)

1.一种利用负载阻抗特性提高井下测斜仪抗震性能的电路,其特征在于:它包括有三个加速度传感器信号调理单元、多通道电子开关(Ul)、信号放大器(U2)、模拟数字转换芯片(U3),每个加速度传感器信号调理单元的输入端与各自相应的加速度传感器的输出端连接,其输出端与多通道电子开关(Ul) —一对应相接,所述加速度传感器主要测量井下测斜仪的工具面参数,所述多通道电子开关(Ul)、信号放大器(U2)、模拟数字转换芯片(U3)依次连接;其中,每个加速度传感器信号调理单元均包括有旁路电容、限流电阻以及用于将加速度传感器输出的电流信号转换为电压信号的采样电阻,所述旁路电容和采样电阻相互并联,其一端接地,且并联后串联有限流电阻,所述旁路电容和限流电阻构成了加速度传感器的负载,形成有负载阻抗,且呈现的负载阻抗能够随加速度 A load impedance characteristic improvement circuit using seismic performance downhole inclinometer, characterized in that: it comprises three acceleration sensor signal conditioning unit, a multi-channel electronic switch (Ul), signal amplifier (U2), analog-digital conversion chip (U3), the input of each of the acceleration sensor signal conditioning unit with the respective corresponding output of the acceleration sensor is connected to an output coupled to a multichannel electronic switch (Ul) - corresponding to a phase, said acceleration sensors are measured downhole measurement tool face inclinometer parameters, the multi-channel electronic switch (Ul), signal amplifier (U2), an analog to digital converter chip (U3) are connected in sequence; wherein each of the acceleration sensor signal conditioning means includes a bypass capacitor, limit and a resistor for converting the current signal output from the acceleration sensor is a voltage signal sampling resistor, the bypass capacitor and the sampling resistor connected in parallel, one end of which is grounded, and the series limiting resistor in parallel, and the bypass capacitor limits load resistor constituting an acceleration sensor is formed with a load impedance, and the load impedance can be presented with an acceleration 感器加测量信号的变化而变化。 Variation plus measurement sensor signal changes.
2.根据权利要求1所述的一种利用负载阻抗特性提高井下测斜仪抗震性能的电路,其特征在于:所述旁路电容和采样电阻之间串联有电感,所述旁路电容、电感和限流电阻构成加速度传感器的负载,能够改变加速度传感器的负载阻抗,其阻抗公式如下: Z = JwCi H----1=l ,2,3 ! ' R + JwLi 式中,j为虚数为角速度,是信号频率f的2 π倍A为旁路电容值,R为限流电值,Li为电感值。 The characteristics of the load impedance utilizing claimed in claim 1, improved circuit performance downhole seismic inclinometer, comprising: an inductor connected in series between the sense resistor and a bypass capacitor, a bypass capacitor, inductor and load resistors limiting the acceleration sensor, an acceleration sensor capable of changing the load impedance, the impedance of the following formula:! Z = JwCi H ---- 1 = l, 2,3 'R + JwLi formula, j is an imaginary number angular velocity, f is the frequency of the signal a is 2 π times the capacitor value, R is the current limit value, Li is the inductance value.
3.根据权利要求1所述的一种利用负载阻抗特性提高井下测斜仪抗震性能的电路,其特征在于:它还包括有三个磁信号调理单元,每个磁信号调理单元的输入端与各自相应的磁场强度传感器的输出端连接,其输出端与多通道电子开关(Ul) 对应相接,所述磁场强度传感器主要测量井下测斜仪的方位参数。 The characteristics of the load impedance utilizing claimed in claim 1, improved circuit performance downhole seismic inclinometer, characterized in that: there are three further comprising a magnetic signal conditioning unit, the input of each of the magnetic signal conditioning unit with the respective the respective magnetic field strength sensor output terminal is connected to an output coupled to a multichannel electronic switch (Ul) contact corresponding to the main magnetic field strength sensor measuring an azimuth parameters downhole inclinometer.
4.根据权利要求1或3所述的一种利用负载阻抗特性提高井下测斜仪抗震性能的电路,其特征在于:所述多通道电子开关(Ul)在任意时刻仅选通输出其中的一路。 The load impedance characteristic or utilizing the improved circuit of claim 13 downhole seismic performance inclinometer, wherein: the multi-channel electronic switch (Ul) only way in which strobe output at any time .
CN201410367764.4A 2014-07-29 2014-07-29 Circuit utilizing load impedance characteristics are improved downhole seismic performance inclinometer CN104141487B (en)

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Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2415049A (en) * 2004-06-07 2005-12-14 Pathfinder Energy Services Inc Determining borehole azimuth from tool face angle measurements
EP1867829A1 (en) * 2006-06-15 2007-12-19 PathFindar Enargy Services, Inc Apparatus and method for downhole dynamics measurements
CN201503268U (en) * 2009-08-11 2010-06-09 天津市泰华科技有限公司 Continuous inclinometer measuring module
CN202100251U (en) * 2011-06-16 2012-01-04 西安思坦仪器股份有限公司 Nine-accelerometer continuous inclinometer
CN102425409A (en) * 2011-11-10 2012-04-25 中国石油天然气集团公司 Well deflection and tool face measurement device and vertical drilling device
CN103195409A (en) * 2013-03-29 2013-07-10 重庆华渝电气仪表总厂 Multi-channel collection control system for gyro inclinometer
CN103388471A (en) * 2013-08-05 2013-11-13 吴佳平 Drilling verification instrument and work method thereof
CN203412572U (en) * 2013-08-05 2014-01-29 吴佳平 Drilling tester
CN204152501U (en) * 2014-07-29 2015-02-11 中天启明石油技术有限公司 Circuit for improving seismic performance of underground gradiograph with load impedance

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2415049A (en) * 2004-06-07 2005-12-14 Pathfinder Energy Services Inc Determining borehole azimuth from tool face angle measurements
EP1867829A1 (en) * 2006-06-15 2007-12-19 PathFindar Enargy Services, Inc Apparatus and method for downhole dynamics measurements
CN201503268U (en) * 2009-08-11 2010-06-09 天津市泰华科技有限公司 Continuous inclinometer measuring module
CN202100251U (en) * 2011-06-16 2012-01-04 西安思坦仪器股份有限公司 Nine-accelerometer continuous inclinometer
CN102425409A (en) * 2011-11-10 2012-04-25 中国石油天然气集团公司 Well deflection and tool face measurement device and vertical drilling device
CN103195409A (en) * 2013-03-29 2013-07-10 重庆华渝电气仪表总厂 Multi-channel collection control system for gyro inclinometer
CN103388471A (en) * 2013-08-05 2013-11-13 吴佳平 Drilling verification instrument and work method thereof
CN203412572U (en) * 2013-08-05 2014-01-29 吴佳平 Drilling tester
CN204152501U (en) * 2014-07-29 2015-02-11 中天启明石油技术有限公司 Circuit for improving seismic performance of underground gradiograph with load impedance

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