SA110310593B1 - Cancellation of Vibration Noise in Deep Transient Resistivity Measurements While Drilling - Google Patents

Abstract

The present invention relates to a transient electromagnetic signal recorded in a ground configuration during vibration logging. Concurrently, accelerometer measurements are made. Accelerometer measurements are used to correct a transient electromagnetic signal for vibration using the accelerometer measurement and conversion function related to the transient electromagnetic signal and the accelerometer. The transfer function can be determined by using measurements in a water container or by using the end of a transient electromagnetic measurement.

Description

¥ Cancellation of vibration noise in deep transient resistivity measurements while drilling Full description

BACKGROUND OF THE INVENTION This disclosure relates to a good electromagnetic induction field for determining the resistivity of earth formations penetrated through a well ih ©0 aperture. More specifically, the present invention relates to the measurement of transient signals in an inductor

© In the presence of a vibrating and cutting chain used to make measurements -measurements | Electromagnetic induction resistors can be used to determine the electrical conductivity of the earth formations surrounding the well bore, and the electromagnetic induction cutting method is described, for example, in the US patent 0c80Y YT Reported to Beard et al., the device 0 described in the “VY” Beard patent includes a transmitter coil and a set of receiver coils at axially defined positions along the position of the device. An alternate current is passed through the transmission coil. The voltages that are driven into the receiver coils as a result of alternating magnetic fields driven in the earth formations are measured next. The magnetism of special phase components of the receiver voltages driven by the contact of the medium surrounding the media.surrounding instrument | 0 a

The development of electromagnetic deep search tools has a long history. These methods are used to achieve a variety of different goals. And deep research methods aim to measure

The characteristics of the reservoir between the wells at distances ranging from tens to hundreds of meters (ultra-deep scale). There are single-well and continuous splatter methods, most of which are radical in propagation physics techniques. Radar/seismic wave Technologies radar/seismic wave propagation This set of tools is determined by (Bush©) among other things, its applicability to high resistive configurations and available well bore ull strength and is Clarification of deep transient logging while drilling » And in particular the ability to "took-ahead" to have a great possibility in predicting over-pressured zones Identifying errors at the beginning of drilling in 0 horizontal wells ¢ drill bit in horizontal wells identifying massive salt structures profiling massive salt dl estructures one of the basic problems deep transient lull measurements in cutting applications while drilling logging while drilling is a parasitic signal As a result of is parasitic signal due conductive drill pipe 0011081100. A set of techniques are used to reduce the parasitic signal in the resulting data (Ve) at once. For the purposes of the present disclosure; We explain the following definitions of 'Transient Electromagnetic Method' from the Schlumberger Oilfield Glossary, and there is a variation in the electromagnetic method in which electric and magnetic fields are driven by transient pulses of Transient pulses electric current in coils or antennas instead of direct current (twisted)

¢ Many transient electromagnetic signal applications use test depths of up to 100 meters. A solution to a high-energy excitation source for deep transient measurements is mentioned in US Patent 01105 S.A. "Let's hear." While the highly sensitive thrust receptors are known to suffer from noise emitted as a result of the movement of the thruster coils in the earth's magnetic field ©. Methods have been suggested to cancel acoustic noise6 in logging while drilling tools. acoustic drilling. See, for example, US Pat. 1649760745 Dubinsky J where the cancellation signal is derived from a time-reversing device mode and formation mode signals. The present disclosure is directed at methods for removing low frequency noise | 0 (less than about 1 kHz) in transient electromagnetic signals generated by drilling vibration in the earth's -magnetic field General description of the invention An embodiment of the disclosure embodiment disclosure About a method for evaluating a ground formation using 1 carrier carrier in a well bore in an earth formation The method includes: Using a transmitter on the carrier to receive pd) in an earth formation ¢ Use of one antenna at least on the carrier to produce a primary signal responding to an interaction on the carrier signal with configuration 1 to ground formation at it; The first signal includes noise resulting from producing first signal responsive from the vibration of the carrier; Correcting the first signal of noise First signal including noise 0 Producing a corrected first signal using a second signal Alla on the vibration of the carrier ¢vibration carrier Estimating a distance to meet the earth formation

Ht formation using a scored first signal The communication of other processes using an estimated distance. | Another embodiment of detection is a device configured to estimate the Earth's formation. The device includes a Jala shaper to be transported into the bore 6[1]; A transmitter on the device to produce a signal © electromagnetic Earth formation lsd tearth formation At least one on the tool formed to produce a first signal responsive interaction A transient signal with formation 1 to earth formation The signal includes The first is noise resulting from the first signal including noise produced by the vibration tools; at least one dala measuring device on the modulating tool to produce at least one second signal responding to the Ve vibration tool; At least one playback device configured to: produce a corrected first signal using a first signal and measure when estimating at least one second signal an interface distance in the earth formation using the corrected first signal; And other players connected using an estimated distance. Another embodiment of the disclosure is a decisionable computer intermediate output with stored instructions 0 which when read by at least one operator causes the method to be executed by at least one operator. The method includes: Correcting the first signal received by means of at least one antenna transduced in Ant well bore responding to a transient electromagnetic signal resulting from the cracking of a transmitter on the stand to the effect of vibration of an instrument using a measuring instrument by means of an accelerator on the instrument; Using the corrected first signal to estimate the distance to the interface in an earth formation | 1; And the connection of other drivers using an estimated distance. Brief explanation. for drawings

0 Figure 1 shows the resistance of the cutting tool according to the present invention transmitted in the well bore all, which includes: a-. to the work prompt. B- the control unit. © C - Warning. d- Work direction. appearance ? Explains the cause of the parasitic signal in the vibration of the receiver coil vibrating in an earth's magnetic field Figure ¥ illustrates the effect of the coil vibration in an earth's magnetic field | 0, which includes: a- time (times). b- Voltages form; is a flow curve showing the steps of the current detection; It includes: a- ld identification signals. 1 — Define the transfer function. C-correct conversion function for blister conditions. E- Correction of antenna signals using Excel signals and a corrected conversion function. D- Measurement of Excel and antenna signals in blister. Figure © showing an embodiment of the current disclosure noise cancellation 0

Figure 1 shows the schematic diagram of a 01 drilling system with a 01 drill string carrying a 01 drilling assembly (also referred to as a cbottom assembly). hole assembly copied in well Jal".

bore" or "well bore" Lidl 76 for drilling well bore includes

© 01 drilling system or drilling system 111 conventional derrick crane erected on the ground VY erected on floor which supports a rotating platform 04 supports rotary table and ls

It rotates by means of a basic motor, Jie electric motor (not shown (Six) at the required rotational speed, and the drilling machine includes 01 drill string, ysl Ji tubing tube for drilling YY drill pipe or coil tubing extending downward from the surface

well bore ill to hole 01 drill string and the drilling tool is pushed .77 well bore to hole 0 iy for example injector ccoiled-tubing applications ccoiled-tubing applications coiled from the source tubing while used to move the tubes ¢(not shown iy) (other than injector

e.g. pulley (not shown) to well bore 77. and

The Vee 00 drill bit connects to the end of the drill string, where it breaks attached geological formations when drilling a drill bore idl hole.

Yo, the drilling tool is associated with the work guides “YY drill pipe”, and if the drill pipe is used, .77 hole

Via Kelly connection “YA” stylet and Y4 pipe line (tubing) through pulley ?7. And

during the drilling process; To control the weight on the pulley

Yo, which is an important measuring tool as it affects the penetration rate. And the work-directed process

are well known in the field and are not described in detail here.

A

From a suitable drilling fluid 1 mud hole, and during drilling operations, a suitable drilling fluid is circulated on the Vo drill string drilling shal under pressure through a channel in the FY source to the drilling medium 74 04 pump and the drilling fluid passes from the TE mud pump through the mud pump and the 71 Kelly and YA fluid line connection is done by removing the practical (invisible) fluid line 0 at the bottom of the manhole Blister 0) through a hole in a drill bit 5.00 circulates fluid 1 Discharge of drilling fluid © 17 well bore and bore hole 70 between the drilling tool YY above the hole through an annular space 1 bore and . Y0 via return line YY returns mud pit and rotates to the mud pit and © drill bit drilling fluid acts lubricate +0 0 drill bit to carry the well hole fractures away from the drill bit and the surface collar probe gives the fluid flow rate to give information about the FAY fluid flow rate, respectively, information about 010 and probe 583 associated with the drilling tool S2 surface torque sensor not the diameter and rotational speed of the dripper. The probe is used (invisible provide hook load drill string él) on line 71 to give a load hook to the tool (shown

Yo for © drill bit The drill bit is rotated cembodiment disclosure And in one embodiment of the disclosure Ye only. And in another embodiment of the reveal; A motor is arranged under the YY drill pipe on the way of the drill pipe to rotate the bit 010 drilling assembly in the hole 00 (mud motor) usually to complete the rotating force; if that is a YY drill pipe and The drill pipe is rotated 00 of the drill and to effect changes in drilling direction. Yella #58 mud motor embodiment 0 embodiment coupling, and in one embodiment 0 (not shown) via drive shaft by means of a 50 drill bit pushed into the drill bit q

Lie 50 drill bit mud motor And the mud motor rotates ©1 Arranged in the assembly of the load Under pressure 00 mud motor Through the mud motor YY drilling fluid The drilling fluid passes the root forces and The coaxiality of the drill bit OV bearing assembly and supports the work assembly 6©. As the center of the part OV bearing assembly for the load assembly 0A stabilizer and the drill bit mud motor works lower than the mud motor assembly © and in an embodiment Another “embodiment disclosure” drilling sensor module model 04 is placed near the drill bit©. The drilling sensor module includes sensors, circuits, processing software drivers, and algorithms relating to dynamic parameters. These measurements may include the return of the “dad” of the “drilling assembly” backward rotation; (Geka shocks, annulus pressure ull and annular pressure; acceleration measurements and other measurements of drill bit cases, and an appropriate dimension gauge or a third connection tool, VY, is given using the “on” For example, a bidirectional dimension gauge, as shown in the drilling assembly +9, and the Vee drill-probe module operates on the probe information and relays it to the surface control unit.

YY via telemetry system 560 unit “YA power unit” VY communication sub The secondary communication device is connected and the tools are 71. drill string and measuring tool during drilling 79 together in tandem with the drilling tool in assembling YA's "Twisted Minor" for example; Used in the contact of the measuring tool while drilling the hole de dll tools and tools, and these tools are . The lower part of the excavation assembly

Ye Various measurements lead to measurements 000 drilling assembly 5.0 0 drill bit various measurements including pulsed nuclear magnetic communication 5. YT while the borehole is being drilled Meteorology of Z signals, conversions of signals, measurements and measurements of YY sub signals using dual telemetry; For example works on the roof. as an alternative; © drilling can be done in well bore assembly using an actuator down the blister signals. afterlife signals and means and signals of down hole sensors from down hole sensors 5 and operate those signals according to instructions 01 sensors 81-53 and other sensors used in system 0 and display a surface control unit 50. control unit programmed to be given to the surface control unit the required excavation measurements and information 5 0 measurements of the surface control unit other surface on the display 7; used by an operating unit to control drilling operations. The control unit £0 may include a computer or operating system based on micronumbers; memory to store programs, forms, and data; Recorder to record data and other peripherals. 10 can be formed; 4 When a danger occurs configured to activate alarms 5 0 Control unit Specific or undesired operating conditions.

YAY parasitic signal in receiver coil cause a parasitic signal in the vibration daly file) and produces vibration of the drill string.

: 11 3 and 11 between the axes of the receiver coil on The spatial derivative 2 © of the displacement specifies an instantaneous angle in XZ in an area YY direction of Jia and drill string axis 7 = rate of direction of tool axis Drilling taking into account earth's magnetic field axis form ¥ direction of geomagnetic field driven in receiver coil as Voltages Expression of voltages (Say File 11 ?. and

V.,(@) = 1 (B; A, cos a) ~ A, - [B, sine, ] . 2%] © magnitude projection is a magnet from a projection of a geomagnetic field Bp Cua is an effective area of the receiving coil” and XZ is on the plane of earth's magnetic field taking into account earth's magnetic field is The angle of the earth's magnetic field ap is the direction (1) of the axis of 5.7, the first term is on the right side of the equation, and the deviation of the earth's magnetic field axis is geometric, which depends on the earth's magnetic field, 0, and the second term is It is the one that must be measured by means of the rotary accelerator on the instrument.2 It should be noted that accelerators responding to linear acceleration can also be used for the purpose.For the cost of more complex processing Jia model, an approximation is made that can cembodiment disclosure In one embodiment of the detection ov —0 vibration of a drilling tool by a sine wave Typically 4 this has a frequency in the range of 0 described for age is a sine drill string and the acceleration is side of the drilling tool Hz by the following expression: gn) = = = ra oslo, (1-6 - 2/01 @ random time. - 0

YY

The intensity of the drill string for a position on the Ble V drilling tool is an acceleration range; 7 and go, where vibration frequency Ble is the sound in the drill collar, respectively, and m0, the receiver coil with the vibration of the coil as Voltages, and the voltage can be expressed as 7 (0) < 2 A , Bp B ( +72 05)0 Ram Tanak .random phase . where © is a random phase © and compared with the signal Pry (2) noise voltage For clarification, the following system noise voltage is estimated for clarification Measurements: A typical transient moment in the receiver. Measurements are taken (the transmitter is placed coaxially away from the receiver M2004 722 f= bipolar transmission. m"; acceleration range with 01 = with a distance of m unchanged jam in fig. 1); effective receiving capacitance, hr carth's ms; thrust of a geomagnetic field ©0001 = v velocity of sound » 7yn/m0 1 - 2/20 0 - angle e 60uT = Bg magnetic field It is the time of the dominant signal formation (Yo) curves, and the figure shows the comparative results: the curves are for three YAY and Veo FY, and the curves are 8/20 010. shal (three facts vibration noise signals different composition of vibration noise signals) signals are a typical broadband thermal noise fact: Yo noise (@ random phase 06) and noise spectral 11177 Ji:11177 1 kHz voltage noise amplifier with transverse bandwidth. For current detection purposes; The term “carrier 0” which includes bottom hole assembly is used to include part of the carrier “magnetometer” and the transmitter accelerometer “receiver”; Acceleration device: severity vibration related noise and shows the shape of ? the intensity of noise-related vibration Ye in recent times; Corresponding to deeper regions to search for vibration noise

VY

formations; Which tightly controls the configuration signal and thermal noise of the amplifier. And it follows (the first expression between the magnetometer data and the magnetometer data (1) from the equation and reading of the rotary accelerator device (the second expression between the first bracketed expression in brackets, respectively) must be followed to calculate and The second bracketed expression removes the unwanted vibration in the receiver coil. 0 is derived from the assumption that the accelerometer is placed in the coil (1) and it should be noted that the reception equation. In a more general case The relationship between noise related to vibration in the receiver > and the accelerometer readings can be expressed S 4 1 It is the function of converting the accelerator device - to - receiver Kiar and Wen Al?-

AY) for a single-axis accelerometer and the accelerometer-to-receiver transfer function is a single-axis accelerometer reading. Taking into consideration the magnetic field magnitude 0 .receiver coil axis

Kut) = Luq Umrah 5) Using excitation or 2-7 transfer functions, and the transfer functions range is determined at a certain rate of frequencies by harmonic acoustic excitation of the homogeneous sonic signal, followed by Kor 1 = O and, in an alternative embodiment according to this disclosure, the conversion function froqencies 00 is determined by obtaining an additional set of 86 while drilling

1 The data is at a later time period after the preferred time period. For rapid decay of the formation signal, an acceptable methodology). Las The acquired data additionally includes a portion of the formation signal that is negligible (less than the readings of the 54 (f) accelerometers data). The existing accelerometer data can be used to remove the vibration related to the impulse signal From the receiver data magnetometer readings Datd' = Data— > 4 1p - | 0 4, °

In most parasitic cases the Kom (BE) transfer functions are not fixed in the form of lS then a statistical method can be used to construct the adaptive form of the transfer function as described in US Patent 777557004. Dubinsky's has the same designations as presented in the present disclosure and components Mentioned here for reference

0 and in Dubinsky the audio signals of the composition are measured by means of a hydrophone. An accelerometer is placed near each hydrophone. In one embodiment of Dubinsky the measurement is made in an experimental vessel; Where there is no configuration signal. Under these conditions, both the accelerometer and the hydrophone correspond to an audio signal of the instrument system. The conversion function between the two can be specified. and sequentially. When the instrument is deployed in the well bore, the hydrophone responds to both

0 _ of the tool and configuration; While the accelerometer depends mainly on the device. The accelerator signal and the estimated conversion function are used to correct the ALD hearing aid signal for instrument removal. and in a corresponding manner; According to the present disclosure; The antenna responds to a formation signal and a tool signal caused by the vibration of the tool; While the accelerometer is responsive to the vibration of the instrument. And from here, the aforementioned method is directed by Dubinsky in an acceptable way with one of the modifications mentioned below. Measurements can be indicated

Measurements 0 in the test enclosure and antenna signals responding to the transmitter signal during

1 Referential excitation. The reference excitation can be a functional step; or monochromatic excitation at a range of frequencies. and when using a step functional; The spectral analysis of the accelerator meter and the antenna signals gives the color acceleration function. The antenna signals give a BLE value. And with a single measured excitation of a conversion function at the frequency of the signal. and by looping over a range of frequencies; © is defined as a conversion function measured at a set of frequencies. However; The measured transfer function cannot be used directly; The adjustment is made according to the downhole conditions. And in particular; is subdivided into aa aa, for magnetic field Z— is the inclination of the pr axis in the experiment container and earth magnetic field [Bes 81120 zp J in the experiment container; And multiple via the earth magnetic field, ya, under conditions below the earth magnetic field, where nm13 is a geomagnetic field 7- and the axis of the earth magnetic field. To give a conversion function related to antenna scales and accelerator scales under lower conditions 3- By means of magnetometers with “? Components down the hole pr the hole. Component magnetometers downhole 0 can be specified

Calibration signals 1111900160 This is illustrated in Figure 4. Calibration signals are measured This includes pneumatic measurements during vibration from the instrument up to three components 5.11 40 from the accelerator. The £07 conversion function is specified as described above. The accelerometer signals and the antennas are measured under conditions below aperture 017 4. The antenna signal is corrected using equation (1) up to ? the accelerometer signals using the 0 proportional £10 conversion function discussed above.

As indicated (lila missed the end of a transient electromagnetic signal with no modulation signal. In one embodiment of cp HAY) instead of using the experiment container for calibration; Down-hole calibration measurements are made using the signal end of the antenna. If this is done, the step of correcting the conversion function for the tilt of a geomagnetic field is not necessary if the 0 correction for each measurement uses calibration signals measured at substantially the same depth as the measurement. It should be noted that the vibration of the drill string tool at a depth will be different from the measurements in the experimental container with respect to the differences in temperature and the differences in the weights on the bit. For thermal noise; It is desirable to estimate the conversion function using an average

From the collection of measurements of antenna measurements and measurements of the accelerometer.

0 In a special embodiment (A) reported in Dubinsky, a reference accelerometer signal and hydrostealth signal are measured in the well bore and a reflection time of the accelerometer signal and hydrostealth signal is applied. The conversion function of estimating spectral power intensities is derived from two reflection time signals: continuum spectral intensities of two reflected time SILs; A conversion function between two time reflection signals and coherence between two reflected time signals. in one embodiment according to the present disclosure; Uses

0 is a similar method, where the first HL is an accelerometer signal and the second signal, Ble, is an antenna signal.antenna signal. Figure 0 shows an representative tool, which includes assembling a rotary accelerometer DG editors 1 three-axis rotational accelerometer assembly; The three-axis directional magnetometer is 507 long

00 Receiving antenna 2000 The transmitter antenna is shown as a model at a distance of 1 meter or more.

VY

The above detection is recommended with reference to the measuring device during drilling carried on the drilling tool, and the detection method can also be used on other types of measuring device during the drill string, which is carried on the tubular device; It can also be used on a wire line portable cutting tool. In particular, it can be used with the device of a passing wire line on a very deep earth, where the oscillation of the highly sensitive receiver coil in the presence of an unacceptable noise field may cause an unacceptable magnetic field. It should also be noted That while an example is given about the coaxially oriented transceivers used; It is not limited in composition. The above method can be used with a transmitter and/or receiver oriented at an angle to the elongated axis of the cutting tool. In particular, 0 using measurements produced with antennas directed coaxially and inversely as listed in US Document ev + TeV TY of 18160165 have the same designations as the present detection and the components herein are listed in their entirety for reference; And it is possible to get an accurate estimation of the distance of the interface and use it to navigate the warehouse. The interface can be gas-<oil interface; Oil-cele interface Gas-water interface and/or boundary cradle. The estimated distance can be used (OLE 006 Itskovich) to control the direction of drilling. The method described in Ve subtracts a measured reference in a largely homogeneous medium from a measured signal to eliminate the effect of the continuous body of a vibrational attenuation tool gia cutting as in the patent American 701500717. And remember the use of eddy currents on the body of the bottom hole assembly on the damping portion body. Tool 0 and lie in running the data is the use of a computer program on a readable medium in an appropriately automated manner, which enables the processor operator to perform control and operation

Ya

Flash ROMs, EPROMs, EEPROM, Readable media may include Optical disks and Memories. The preceding list is directed to specific embodiments. According to the list, the various embodiments will be visible to those skilled in the art. . It means that all changes within the perspective and spirit of the attached elements are included through the previous disclosure. ©

Claims (1)

Claims 1-1 A method for evaluating an earth formation The method includes using ¥ a transmitter on a Jil carrier in a hole bore Ji to produce an electromagnetic signal ¥ in an earth formation ¢earth formation; Using at least one antenna on the stand to produce a first signal, responding to the interaction of an electromagnetic signal with an earth formation = and the first signal including noise resulting from vibration 0 carrier ¢ carrier vibration A first signal noise producing signal corrected 5:88 4 using significant vibration of the carrier ¢.vibration carrier 0 Estimate the distance to the interface in the earth formation using a 1 tcorrected first signal and 1 operator connection also using an estimated distance. 1 >- method according to item 1; It also includes the use of at least one accelerometer on the ¥ carrier to give a second cua second signal. The first signal includes the use of an ov conversion function related to the response of at least one antenna to vibration on the carrier. vibration carrier 1 *- the method according to item 7; involves estimating a transfer function using the measurement of a first signal ¥ at least a second signal in test tank 1 +- method according to Item 7; Whereas, estimating the conversion function also includes making measurements of a first signal and a second signal, at least one responding. Y 0 impulsive force (i) by means of one of the responsive excitation carrier v plurality substantially monochromatic and (i) a group of “force ¢” signals. According to the element ¥ as the estimation of the transfer function also involves the use of measuring 1 —0 part on the second signal Ali and another part of the first signal x .016 bore least in the blister aperture. The method according to the element ©, since the estimation of the transfer function also includes the use of a scale of -1 + one third signal at least one to give a third signal magnetometer provide magnetic ¥ magnetic field relative to a magnetic field tool relative At least an estimate from the management directive “vibration earth during . Earth during vibration, where at least one accelerator device is used that includes a Y device. Method according to element Y - 1. rotational accelerometer “electromagnetic signal” As the electromagnetic signal » 1 method according to item A-01. transient electromagnetic signal also includes a transient electromagnetic signal oy where it includes ¢ earth formation apparatus configured 4-1 Device: oy hole bore ill carrier configured conveyed ¥ ; A transmitter on the configured carrier “Atsouh to produce an electromagnetic signal in an earth formation + at least one antenna on the carrier configured to produce a responsive first signal 1:5 "signal |" for the interaction of an electromagnetic signal with an earth formation. The first signal includes the first noise signal 4 resulting from the carrier vibration; 0 At least one accelerator device configured to produce a second signal indicating a carrier vibration; and gy at least one operator b 1 0 (produce a corrected first signal using at least one second signal 44 oe (b) estimate distance of the interface in an earth configuration formation using a corrected first signal yy , and yy (v)_conduct further actuators also using an estimated distance. at least one to produce a corrected first 0 signal using a conversion function related to the M scale response. at least one gradient of carrier vibration. At least one operator configured to estimate the 0-transformation function using a measurement first signal and at least one + second signal in the test tank z YY; Where at least one actuator is configured to transform the function of the device 01 according to the element 1-? 1, at least one second signal and a second signal, the first signal, using measurements from the first signal by one of the (11) 4 sets of 4 impulsive force to substantially monochromatic acoustic signals ©, in which one actuator is modulated on Least to estimate the switching function 01 device according to element VY) and the last part of the second signal HL by measuring the last part of 1 p 1101. bore Lull at least one in the second slot signal where at least one trigger is modulated to estimate the instrument 01 shift function according to the magnetometer indicative element (VE) of a third signal by using a third signal Y of a magnetic field orientation tool relative to 7 .earth during vibration indication to orient an instrument relatively magnetic field ¢ the instrument according to item 10; At least one accelerometer -1#1 rotational accelerometer ~~ comprises Y YY carrier comprises item 4; Where the holder includes the Las bottom hole assembly device - 11 01 drilling tubular. The device also includes a formed tubular drilling tool ¢ bottom hole assembly ¥ .hole bore to transfer the bottom hole assembly to the configured 0 “blast hole” output of a computer medium readable has stored instructions which when read by at least one -117 operator cause at least one operator action ¢ method where method includes: y via at least one antenna correcting first signal received received ( Jol signal correction 0 “ 3 To estimate interface dirtiness in a corrected first signal configuration; and earth formation + other connection operations using the estimated space. 117 Computer readable media according to item A = 1 disk (v) and ¢ flash memory (iv) “(ii) EEPROM “EPROM (ii)” ROM 0 . optical disk Asa ¥