Method for determination of pneumatic puncher deviation angle from prescribed trajectory

FIELD: electronics.

SUBSTANCE: method for determination of pneumatic puncher deviation angle from prescribed trajectory includes creation with the help of transmitter and transmitting antenna the electromagnetic field oriented along direction of pneumatic puncher movement. At the output of receive antennas signals are extracted which are proportional to electromagnetic field component strength and which are separated using decoupler and alternatively supplied to receiver input where they are detected and amplified. According to difference of these signals the pneumatic puncher deviation angle from prescribed trajectory is evaluated. As transmitting antenna a nonsymmetric dipole is used where pneumatic puncher is long arm and conducting material disk is short arm which disk is connected to it via dielectric disk. Electromagnetic field directional pattern is created in the form of cone in microwave frequency band against electric component. Deviation angle is evaluated according to difference of signal amplitudes at output of comparing device connected by its input to receiver output and by its output - to indicator.

EFFECT: enhancement of efficiency due to increase in accuracy, range capability and interference resistance relative to external natural and artificial noise.

2 cl, 2 dwg

 

The technical solution relates to electronics, and in particular to short-range radar, and used construction equipment for determining the deflection angle of the punches from the predetermined trajectory at the trenchless laying of underground utilities.

There is a method of determining the deflection angle of the punch from the predetermined trajectory, which is implemented in the device the same destination (Wpisy, Eaastern, Addphoto. A device for determining the depth and spatial orientation of controlled punch in the ground // Physical-technical problems of development of mineral resources. - 2001. No. 3, pp.96-99), in which a transmitter with an operating frequency of 41 kHz and three transmitting antennas located in the punch, punch, create a rotating magnetic field, the plane of rotation which is perpendicular to the direction of movement of the punch. With receiver and two receiving antennas, which have vertically above the earth's surface, determine the bearing and distance to the punch, also use one receiving antenna to determine the plane of rotation of the electromagnetic field. Indicator device determines the angle of the punch from the target path and the signal level.

The disadvantages of this method are: the placement of the transmitting device in pneum is the punch can cause it to break, and the use of low-frequency waves does not provide sufficient immunity against external electromagnetic interference. Using prototype, you can determine the deviation of the punch from the predetermined trajectory on the corner ±5° when the distance 10 m, but in the article there are no data on the practical measurement of the angle of deviation in the real world.

The closest solution to the technical nature and essential features is the method for determining the deflection angle of the punch from the predetermined trajectory for U.S. patent No. 6717410, EV 47/022 (20060101); EV 47/02 (20060101); G01V 3/15 (20060101), publ. 06.04.2004, In this method using a transmitter with an operating frequency of tens of kHz and a transmitting antenna, which is placed on the punch, punch, create an electromagnetic field, oriented along the direction of motion of the punch. Using receiver containing orthogonal to each other, the first and second receiving antennas, according to the intensity of the magnetic components of the electromagnetic field with the earth's surface to determine the distance to the punch. The angle of the punch relative to the receiving antennas is determined by the phase shift in two orthogonal receiving antennas.

The disadvantages of this method lie in the lack of detection range pneumotropic the spacecraft due to work on the magnetic component of the electromagnetic field, since the magnetic component associated with the electric component of the electromagnetic field value:where Z is the resistance of the medium. Using the low-frequency transmitter (tens of kHz) does not allow for sufficient robustness and accuracy when determining the deflection angle of the punch from the predetermined trajectory. The location of the transmitter and the transmitting antenna on pneumotropica can cause it to break.

The technical problem is to increase the efficiency of the method of determining the deflection angle of the punch from the predetermined trajectory by increasing accuracy, range and interference immunity against external natural and artificial interference.

The technical problem is solved in that in the method of determining the deflection angle of the punch from the predetermined trajectory, according to which a transmitter and a transmitting antenna to create an electromagnetic field, oriented along the direction of movement of the punch, at the output of receiving antennas emit signals proportional to the intensity of the components of the electromagnetic field, which is shared with decoupling device and alternately fed to the input of the receiver, where they will detect and amplify, and the difference of these signals on the display judging what about the angle of deflection of the punch from the predetermined trajectory, according to the technical solution as a transmitting antenna using a single vibrator, in which long shoulder is punch, punch, and short - disk of conductive material, is connected through a disk of dielectric material to pneumotropica. In this form the pattern of the electromagnetic field in the form of a funnel in ultrashortwave frequency range for the electric component, and about the angle of deflection of the punch from the predetermined trajectory is judged by the difference of the amplitudes of the signals at the output of the comparator, connected input to output receiver, and output to the indicator.

Use as a transmitting antenna unbalanced vibrator, in which long shoulder is punch, punch, and short - disk of conductive material, is connected through a disk of dielectric material to the punch, punch, allows you to generate the radiation pattern of the electromagnetic field in the form of a funnel in ultrashortwave frequency range electrical component that improves the accuracy, range and interference immunity when determining the deflection angle of the punch from the predetermined trajectory and, consequently, increases the efficiency of the method. Work on the difference of the amplitudes of the signals emitted at the output of the comparator, you can simplify the implementation of the method and the floor is part of the information about the angle of deflection of the punch directly on the electromagnetic field.

Suitable receiving antenna positioned in the receiving pit, which improves accuracy and robustness in the process.

The essence of the technical solution is illustrated an example implementation of the method and the drawings: figure 1, which shows a block diagram of the method for determining the deflection angle of the punch from the given trajectory (next - method), cut in the horizontal plane, and figure 2, which depicts the experimental pattern unbalanced vibrator (for punch brand IP) electrical componentelectromagnetic fields (cut in the horizontal plane), where E is the electromagnetic field strength at a given point of space; Fmax- the maximum value of electromagnetic field strength; φ - the glide angle.

Structural diagram of the method contains (1): transmitter 1, the transmitting antenna in the form of an unbalanced vibrator consisting of the punch 2, disc 3 of dielectric material, disc 4 of conductive material, the first receiving antenna 5 (hereinafter receiving antenna 5), the second receiving antenna 6 (hereinafter receiving antenna 6), an isolation device 7, the receiver 8, the device 9 comparison, the indicator 10. Thus the output of the transmitter 1 is connected to the disk 4 from tamago material and pneumotropica 2. In a transmitting antenna air puncher 2 is connected to the disk 3 of dielectric material, which is connected to the disk 4 from the conductive material. The outputs of the receiving antenna 5 and the receiving antenna 6 is connected to the inputs decoupling device 7, the output of which is connected to the input of the receiver 8 connected to the input device 9 comparison, and the output device 9 comparison connected with the indicator 10.

The method is implemented as follows. Air puncher 2 is used as the long arm of the unbalanced vibrator (l1≈λ, l1- the length of the punch, and λ - wavelength) for the formation of ultrashortwave frequency pattern in the form of a funnel on the electric component of the electromagnetic field, providing sufficient signal strength at the receiver input 8. To do this through disk 3 of dielectric material to pneumotropica 2 attach the short arm of the transmitting antenna - disc 4 of conductive material (length l2≤λ/10). The transmitter 1 with a specified capacity and operating frequency by radio-frequency cable connected to pneumotropica 2 and disk 4 of conductive material. The diameters of the disks 3 and 4 of conductive material and dielectric, respectively, do not exceed the diameter of the punch 2. In these disks 3 and 4 on the center of the holes are made connectable to vozduhoprovodyaschih hose to pneumotropica 2.

Air puncher 2 moves along a given trajectory. Receiving antennas 5 and 6 are placed in the receiving pit. Receiving antennas 5 and 6 initially operate on the level of a pattern, defined by the distance between them and the physical environment, such as the level of the pattern in pixels 1-1 (figure 2). At the output of the receiving antennas 5 and 6 produce the same amplitude voltage signals. Using decoupling device 7 by the alternate connection of the receiving antennas 5 and 6, these signals are separated and fed to the input of the receiver 8, where they will detect, amplify and serves on the input device 9 comparison. The output device 9 comparison get the difference of the amplitudes of the output voltages of the receiver 8, which during movement of the punch 2 in a predetermined path theoretically equal to zero.

When approaching the punch 2 with a reception antenna 5 and 6 there is an increase of the intensity vector of the electromagnetic field, and the work is carried out on the points 2-2, then points 3-3 pattern, etc. During movement of the punch 2 in a predetermined path changing level pattern, but the difference between the amplitudes of the output voltages of the receiver 8 is theoretically equal to zero.

When the deviation of the punch 2 from the target path to the input of the receiving antennas 5 and 6 do different the values of capacity, which is equivalent to the amplitudes of the input voltages Um1and Um2receiver 8.

Power RCRgenerated in the receiving antenna 5 or 6, it is possible to determine, knowing the power flux-density at the point of reception and settings foster 5 and 6 and the transmitting antennas:

wherethe power flux - density;

PAper- power transmitter 1;

Dlane- coefficient of the directional transmitting antenna (in this case, the unbalanced vibrator);

R is the distance between the receiving antenna 5 or antenna reception 6 and pneumotropica 2;

G is the specific attenuation in the environment;

Andeff- the working area of the receiving antenna 5 or 6 with regard to its coefficient of directed action.

Power signals P1and R2coming from the output of the receiving antennas 5 and 6 through an isolation device 7 to the input of the receiver 8 can be counted in amplitude Um1and Um2voltage at the receiver input 8:

P1-P2≠0,

ΔUI=Um1-Um2,

where Rwhant- input impedance of the transmitting antenna unbalanced vibrator;

ΔUIthe difference between the amplitudes of input voltages of the receiver 8.

The output device 9 CPA is in form of a differential signal:

ΔUo=Kus·(Um1-Um2),

where Kusthe gain of the receiver 8 with regard to the detection signal.

Level ΔUothe indicator 10 is judged angle of deflection of the punch 2. The accuracy of the method is determined by the excess of the amplitudes Um1and Um2stresses above the noise level.

To the receiver 8 have the following requirements:

the relative sensitivity of capacity not less than 120 dB (or voltage units Áv);

- linear dependence of Uo=f(UI), which, if necessary, provide manual adjustment of the sensitivity of the receiver 8;

- operating frequency greater than or equal to 100 MHz;

- the use of directional receiving antennas 5 and 6 of the simplest type;

- work on the electric component of the electromagnetic field.

For tracking the deviation of the punch 2 from the predetermined trajectory in the vertical plane, you can use the second receiver and the third receiving antenna (not shown in figure 1).

Receiving antennas 5 and 6 can be positioned not only in the receiving pit, but on the earth's surface, while experimentally proved that the accuracy in determining the deflection angle of the punch 2 from the predetermined trajectory is reduced more than three times.

Using this method can is about to determine the deviation of the punch 2 from the predetermined trajectory angle of 5÷ 10° in sandy loam at distances up to 20 m, and in the loam at distances up to 10 meters

1. The method for determining the deflection angle of the punch from the predetermined trajectory, according to which a transmitter and a transmitting antenna to create an electromagnetic field, oriented along the direction of movement of the punch, at the output of receiving antennas emit signals proportional to the intensity of the components of the electromagnetic field, which is shared with decoupling device and alternately fed to the input of the receiver, where they will detect and amplify, and the difference of these signals on the indicator judge the angle of deflection of the punch from the predetermined trajectory, characterized in that the transmitting antenna using a single vibrator, in which long shoulder is punch, punch, and short drive of conductive material, is connected through a disk of dielectric material to the punch, punch, thus forming the pattern of the electromagnetic field in the form of a funnel in ultrashortwave frequency range for the electric component, and about the angle of deflection of the punch from the predetermined trajectory is judged by the difference of the amplitudes of the signals at the output of the comparator, connected input to output receiver, and output to the indicator.

2. The method according to claim 1, characterized in, is that the receiving antenna is placed in the receiving pit.



 

Same patents:

FIELD: physics.

SUBSTANCE: system includes recorder containing multichannel module of analog signal reception and transform; each channel of module includes low-pass filter, analog amplifier and analog-to-digital converter. The system also includes data control and processing module containing interconnected numeric processor, data memory and master microcontroller with program memory. The recorder contains AD converters overload detectors designed as timing units included in numerical processor. The recorder also contains built-in screen and keyboard assembly, connected through data exchange bus to master microcontroller with program memory of data control and processing module. Differential operational amplifiers with controlled input are used as analog amplifiers in channels of module of analog signal reception and transform. The recorder contains comprised in numerical processor timing units computing signal invariable component in channels of module of analog signal reception and transform. The recorder input contains units, comprised in numerical processor timing, computing signal invariable component in channels of module of analog signal reception and transform. Input of each specified unit is connected through data exchange bus to master microcontroller with program memory, and output is connected through digital-to-analog converter to driving input of differential operational amplifier mounted in corresponding channel of module of analog signal reception and transform.

EFFECT: improved accuracy and reliability of received data and enhanced ease of use.

5 cl, 1 dwg

FIELD: physics.

SUBSTANCE: sound vibrations are generated in a pipeline to cause mechanic vibration of metal pipe fittings in the magnetic field of Earth. Electric E and magnetic H components of induced electromagnetic emission, ground temperature and noise level environment in the medium transported by the pipe are measured. Pipeline is located by the maximum of E-H correlation function. Ground temperature indicates leakage. The device includes acoustic oscillator with magnetostriction exciter, and gauge. The gauge consists of a case with indicator of electromagnetic emission characteristics and digital temperature indicator installed in the front panel of the case. Battery-powered receiver of electromagnetic, thermal and acoustic emission with amplifier and comparator is placed inside. The receiver can be connected with remote thermal sensor, sensor of ground acoustic oscillations with built-in antenna receiving electromagnetic emission parameters, and geomicrophone.

EFFECT: simple and highly reliable search; wider functional capabilities.

2 cl, 1 dwg

FIELD: instruments.

SUBSTANCE: low-frequency electromagnetic signal is transmitted through the cable. Near the bottom of the water basin, above the cable and across its route, two identical equally oriented systems of magnetic probes tuned to the same frequency, placed at a fixed distance above each other, are moved. At the axis between the magnetic probe systems, a position transducer is placed, used to measure the angle Θ of deviation of this axis from the vertical. Under the lower magnetic probe system, an ultrasonic transducer is placed, used to measure the distance from it to the water basin bottom surface h. The signals from the magnetic probes, the position transducer, and the ultrasonic transducer, are sent to the processing unit. The underwater cable laying depth d is determined using the formula where D is the distance between the magnetic probe systems; α=EL/EU is the ratio of the magnetic field intensity measured by the lower magnetic probe system to the magnetic field intensity measured by the upper magnetic probe system.

EFFECT: increased accuracy and decreased cost.

1 dwg

FIELD: electric geological exploration.

SUBSTANCE: before submergence, clocks installed on the current dipole and the bottom stations are synchronized. The dipole is placed vertically, so that its upper end would be at a distance of no more than 200 metres from the sea surface, and the lower end would be no more than 100 m from the sea bottom (optimally, 20-30 m from the sea bottom). The dipole is excitated with alternating rectangular pulses. The bottom stations are used to record the sweep of the horizontal and vertical field components in time when the current is applied and when it is absent. During signal analysis, the change of primary and secondary fields in time is taken into account and data describing the medium resistance and its polarisation characteristics are determined. The system of equipment includes vessel with a generator and energising field generation unit, which are connected with a vertical dipole with current electrodes, submerged in water, and an onboard data recording and processing unit, using a cable. The system also includes set of bottom stations with horizontal and vertical electrodes and magnetic field sensors. The dipole and the bottom stations are equipped with clocks supporting synchronization.

EFFECT: possibility to obtain data about specific resistance and polarisability of strata during exploration of deep water areas, and provision of more accurate predictions.

3 cl, 1 tbl, 5 dwg

FIELD: technologies for measurement of specific electric conductivity of sea bottom.

SUBSTANCE: the system contains a large number of blocks, each block representing a unit, made with possible positioning in place on sea bottom for measuring horizontal electrical and magnetic fields. To the block unit, a vertically oriented rigid bar is attached and stretched vertically from it. The bar has a pair of electrodes, shifted vertically, which form a vertically oriented dipole antenna. The electrodes are in electric connection with the amplifier positioned inside the unit. Signal from the amplifier is dispatched to data registration processor, which is also positioned inside the unit. By means of the processor, time series of amplified signals of electric and magnetic fields are accumulated over a given time period.

EFFECT: usage of vertical field for measuring transverse changes in the geological structure of sea bottom.

4 cl, 4 dwg

FIELD: measurement technology; specifying cable laying route.

SUBSTANCE: low-frequency electromagnetic signal is transmitted over cable. Two identical sets of magnetic field sensors are disposed at fixed distance from one another above cable, one on top of other. One of sensors in each set is oriented to receive vertical component of magnetic field strength and two other ones, to receive relatively perpendicular horizontal components. Sensors of top and bottom sets are positioned identically to receive horizontal components. Sensors are displaced over cable perpendicular to its route. Levels of resultant magnetic-field horizontal component received by sensors of top and bottom sets are measured. Difference between these levels are calculated. Difference between levels of vertical-component strengths measured by sensors of top and bottom sets are measured. Cable laying route is specified at point where mentioned differences in layers for horizontal and vertical magnetic-field components coincide.

EFFECT: enhanced precision of specifying cable route.

1 cl, 1 dwg

FIELD: technology for finding concealed objects, for example, underground pipelines.

SUBSTANCE: system includes sensor device, having at least two sensors of magnetic field strength vector, positioned in parallel to each other for detecting only distorted magnetic field; device for transformation of direction and value of distorted magnetic field, detected by sensor device, into values for recording and then displaying values in form of letters, digits or graphic symbols; and magnetic marker, formed of magnetic material and attached to cylindrical pipeline. Magnetic marker has upper part and lower part. Lower part has curved structure, such, that center of magnetic material is perpendicular to ground. Polarity of magnetic field is indicated on upper part of magnetic marker.

EFFECT: error-free detection of position, fast attachment of marker to a pipeline, simple measurement of magnetic field.

7 cl, 9 dwg

FIELD: controlling and measuring equipment, possible use for determining depth of elements of grounding device of power supply objects and traction substations of railroad transportation.

SUBSTANCE: in accordance to the invention, strength H1 of electromagnetic field is measured on earth surface above the element of grounding device. Sensor is moved to any point in space for known distance "a" to the side from element of grounding device and known height "b" above the earth surface, and strength H2 of electromagnetic field is measured. Depth of elements of grounding device is determined from formula

EFFECT: movement of sensor away from element of grounding device on earth surface is not required, it is possible to determine depth from any point in space.

1 dwg

FIELD: geo-electro prospecting, possible use during examination of geo-electric composition of Earth to detect abnormally conductive objects, overlapped on top by a layer with reduced specific resistance.

SUBSTANCE: the environment being examined is excited by alternating magnetic field, created by four vertical magnetic momentums, which are positioned on one line in pairs symmetrically in relation to measurement point. Directions of magnetic momentums in each pair are set to mutually opposite. Magnetic momentums, which are positioned on one side of measurement point, are also installed in mutually opposite fashion. Ratio of magnetic momentum to span of internal pair of magnetic momentums is set equal to ratio of magnetic momentum to span of external pair of magnetic momentums. Frequency ratio is measured for real component of horizontal component of magnetic field, parallel to the line, on which magnetic momentums are positioned. On basis of type of frequency ratio of apparent resistance, computed on basis of real component, cut parameters are determined.

EFFECT: increased efficiency.

4 dwg

FIELD: the invention refers to measuring technique and may be used for detecting changes of natural (background) electrostatic field in the Earth's biosphere.

SUBSTANCE: the arrangement has a sensitive element fulfilled in the shape of an antenna, an amplifier, a modulator, an intermediate amplifier, a demodulator, a generator, from the first to the fifth integrators, a needle indicator, a commutator, an additional indicator. At that the commutator has a button for starting the arrangement.

EFFECT: increases accuracy and provides possibility to determine the Earth's static electrical fields.

4 cl, 1 dwg

FIELD: oil and gas industry, particularly oil and gas equipment necessary for well operation, particularly for instrument or tool lowering in well.

SUBSTANCE: position sensor comprises inductance coil arranged outside pipe at well head and receiving unit having the first input connected with inductance coil and output linked with executive device, which controls drive operation. Drive moves tool inside the well. Additional inductance coil is included in the sensor. Additional inductance coil is installed outside the pipe and is coaxial with main inductance coil. Additional inductance coil is spaced a distance of to not less than length of tool to be lowered and is linked to the second input of receiving unit. The receiving unit is made as input differential amplifier having output connected to the first input of synchronous detector and the second input connected with reference generator output. Reference generator is connected with sensor inductance coils. Synchronous detector output is connected to receiving unit output through low frequency filter.

EFFECT: increased simplicity and reliability, elimination of well head improvement.

2 dwg

The invention relates to the mining industry and can be used when remote getrootpane coal

The invention relates to the drilling technique, specifically to the technical means of directional drilling

FIELD: oil and gas industry, particularly oil and gas equipment necessary for well operation, particularly for instrument or tool lowering in well.

SUBSTANCE: position sensor comprises inductance coil arranged outside pipe at well head and receiving unit having the first input connected with inductance coil and output linked with executive device, which controls drive operation. Drive moves tool inside the well. Additional inductance coil is included in the sensor. Additional inductance coil is installed outside the pipe and is coaxial with main inductance coil. Additional inductance coil is spaced a distance of to not less than length of tool to be lowered and is linked to the second input of receiving unit. The receiving unit is made as input differential amplifier having output connected to the first input of synchronous detector and the second input connected with reference generator output. Reference generator is connected with sensor inductance coils. Synchronous detector output is connected to receiving unit output through low frequency filter.

EFFECT: increased simplicity and reliability, elimination of well head improvement.

2 dwg

FIELD: electronics.

SUBSTANCE: method for determination of pneumatic puncher deviation angle from prescribed trajectory includes creation with the help of transmitter and transmitting antenna the electromagnetic field oriented along direction of pneumatic puncher movement. At the output of receive antennas signals are extracted which are proportional to electromagnetic field component strength and which are separated using decoupler and alternatively supplied to receiver input where they are detected and amplified. According to difference of these signals the pneumatic puncher deviation angle from prescribed trajectory is evaluated. As transmitting antenna a nonsymmetric dipole is used where pneumatic puncher is long arm and conducting material disk is short arm which disk is connected to it via dielectric disk. Electromagnetic field directional pattern is created in the form of cone in microwave frequency band against electric component. Deviation angle is evaluated according to difference of signal amplitudes at output of comparing device connected by its input to receiver output and by its output - to indicator.

EFFECT: enhancement of efficiency due to increase in accuracy, range capability and interference resistance relative to external natural and artificial noise.

2 cl, 2 dwg

FIELD: mining.

SUBSTANCE: invention relates to mining, namely, to equipment intended for control of guided horizontal drilling, and can be used for determining horizontal position and turning of tool in drilling inclined and horizontal wells about its axis for subsequent control of its trajectory. In compliance with first version, proposed device comprises three mercury pickups (MP) connected with one of three flip-flops connected with appropriate inputs of microwave oscillator with its output connected to transmitting antenna input. Electromagnetic signal receiver (EMS) is located on the surface. Three outputs of EMS are connected with inputs of three active filters, each connected by its output with appropriate input of one of three tool position light indicators. Axes of the first and third MRs are symmetric about axis of the first MP and located in one plane to make the angle a with device orientation plane perpendicular to second MP axis whereat first and third MPs obligatorily operate. In compliance with second version, proposed device comprises above described elements, but instead of transmitted antenna, microwave oscillator and EMS receiver, it incorporates acoustic radiator and radiator oscillation receiver. EMS frequency depends on tool plane relative to which the device is oriented.

EFFECT: higher reliability and accuracy, expanded applications due to wireless data transmission.

2 cl, 5 dwg

FIELD: oil and gas production.

SUBSTANCE: procedure for orientation of mechanism in well consists in pumping down liquid through device and in its rotation around lengthwise axis. Also, a case of the device has an eccentric orifice on lower surface in a cavity of which there is positioned a lock element freely travelling under influence of gravity. When the lock element shuts off the eccentric orifice, pressure of liquid in the cavity of the device increases. Orientation of the mechanism is determined on base of record of pressure build-up.

EFFECT: simplified design of device for orientation of well mechanisms; reduced cost of operations, reduced time for mechanism installation.

4 cl, 3 dwg

FIELD: oil and gas production.

SUBSTANCE: device consists of computer of azimuth of deflector installation angle, of electric engine of direct current, on shaft of which there is mounted sensor of angular speed with output connecting it with supply windings of electric engine and of sensor of shaft rotary angle relative to case of electric engine. Also, output of the shaft rotary angle sensor is connected to output of the azimuth computer. Azimuth of angle of deflector installation during drilling is determined as sum of two angles: angle of azimuth of installation of deflector measured by known methods in its fixed position and calculated by means of disclosed device current value of rotary angle of deflector relative to the first azimuth.

EFFECT: measurements at higher vibrations of downhole equipment without interruption of drilling and in wells cased with steel columns, thus reducing expenditures for drilling operations and upgrading their quality.

2 cl, 1 dwg

FIELD: mining.

SUBSTANCE: pressure at the outlet of at least one actuating mechanism capable of diverting a link of drilling string bottom layout is used to detect direction of a diverted link. In one version of realisation, the available pressure at the outlet is correlated with available orientation and/or angular displacement, and measured pressure at the outlet is compared to the available pressure at the outlet to detect orientation and/or angular displacement. In another version of realisation the flow of liquid medium released from the actuating mechanism is produced from the pressure at the outlet. The flow at the outlet is then used to calculate a set of data on condition of actuation parameters, which provide for detection of angles of displacement of the diverting link. Orientation and/or angular displacement relative to the drilling string bottom layout may be set according to inclination and azimuth relative to a bed.

EFFECT: higher accuracy of detecting orientation and angular displacement of a diverting link of drilling string bottom layout.

18 cl, 3 dwg

FIELD: oil and gas industry.

SUBSTANCE: method for determining orientation of a downhole instrument in a borehole is implemented as per the data of a three-axis accelerometer unit in the borehole section having sufficient inclination for steady work of the accelerometer unit. Turning angle of the sighting point of the downhole instrument is calculated relative to upper side of the borehole and zenith angle of position of the downhole instrument axis. Azimuth angle of position of the downhole instrument is determined as per the inclinometer survey data prior to the performed measurements. Then, in the section of the borehole having sufficient inclination for steady work of the accelerometer unit, there performed is start and uncaging of a gyroscope, the main axis of which is coaxial to the axis perpendicular to the device axis at the uncaging moment. Spatial position relative to cardinal points is calculated for current position of the main axis of the gyroscope through the calculated turning angle of the sighting point of the downhole instrument relative to upper side of the borehole and known azimuth angle of position of the downhole instrument. Then, downhole instrument is delivered to the vertical section of the well, where, using the gyroscope readings, the change of position of the downhole instrument housing relative to the position of the main axis of the gyroscope is determined, and spatial position of the sighting point of the downhole instrument is calculated as per cardinal points.

EFFECT: enlarging the range of use of the downhole instrument at calculation of its orientation as to cardinal points when using it inside the string of steel pipes and in vertical sections.

2 dwg

Drilling scorecard // 2496004

FIELD: mining.

SUBSTANCE: method of well shaft drilling parameter evaluation involves monitoring of actual orientation of controlled downhole motor end during drilling by monitoring of drilling operation parameter indicating deviation of actual orientation of the said end from preset orientation. For that purpose, deviation of actual orientation of the said end from preset orientation is registered in multiple time moments during well drilling, and each deviation is evaluated and assigned a relevant value indicating drilling parameters at the respective time moment when respective deviation was registered. Further a final indicator is obtained based on value summing and indicating a degree of retention of actual controlled downhole motor end orientation in right position in multiple time moments during drilling, and the final indicator is submitted to evaluation unit.

EFFECT: enhanced accuracy of drilling tool direction evaluation.

13 cl, 6 dwg

Up!