Abstract: A drilling calibration method, apparatus, device and medium based on image recognition includes lifting a top drive to a position of a derrick, and receiving and recognizing a target image acquired by an image acquisition apparatus of an operating terminal; calculating a quantity of pixels from the top drive to a rotary table surface in the target image by a data processing unit of the operating terminal; and receiving a height of the top drive measured by a diastimeter by the operating terminal. The height of the top drive is a height from the top drive to the rotary table surface. A pixel relationship table may be established between the quantity of the pixels from the top drive to the rotary table surface and the height of the top drive by a calibration unit of the operating terminal to finish drilling calibration.

Abstract: Disclosed is a rotary steering drilling apparatus.

Abstract: Disclosed is a rotary steering drilling apparatus.

Abstract: Disclosed is an ocean bottom electromagnetic acquisition station communication apparatus and method. The ocean bottom electromagnetic acquisition station communication apparatus includes: ocean bottom electromagnetic acquisition stations (1) for acquiring ocean bottom electromagnetic information; a control terminal (2) for sending control signals; and a relay timing module (3) connected to the ocean bottom electromagnetic acquisition stations (1) and the control terminal (2) and used for processing the ocean bottom electromagnetic acquisition stations (1) on the basis of the control signals before placement.

Abstract: A method for collecting and processing the tensor artificial-source electromagnetic signal data and a device thereof; the method comprising the steps of: step S1: determining an electric field polarization direction in a measuring area, and arranging electromagnetic field sensors according to the electric field polarization direction in the measuring area, step S2: respectively collecting artificial-source electromagnetic field signals and natural-field-source electromagnetic field signals, step S3: respectively Fourier-transforming the collected electromagnetic field signals, thereby obtaining the electromagnetic field values corresponding to the artificial source, and the collected electromagnetic field signals corresponding to n groups of natural sources, step S4: calculating to obtain the underground tensor impedances according to the electromagnetic field values corresponding to the artificial source and the electromagnetic field signals corresponding to n groups of natural sources that are obtained base

Abstract: An acoustic while drilling receiving transducer array adopts a full-digital structure and a non-oil-filled rubber encapsulation arrangement mode, and the full-digital device of the acoustic while drilling receiving transducer array includes first modules, configured to carry out acoustic-to-electric conversion on weakly received acoustic signals of strata; second modules, configured to carry out amplification, filtering, gain control and digital-to-analog conversion on the weakly received acoustic signals; and a third module, configured to control interfaces of the device and convert external input and output signals.

Abstract: The present disclosure provides an earthquake evaluation method based on multi-type geophysical data.

Abstract: A method and system for electromagnetic method (EM) signal detection based on an onshore sparker source, the method including: arranging an EM signal detection system near a sparker source; releasing, by the sparker source, an electromagnetic pulse concomitantly in a discharge and mechanical energy output process; observing an electromagnetic response generated by the earth under the excitation of the electromagnetic pulse by means of the EM signal detection system for extracting distribution information of geo-electrical parameters; when the sparker source moves, moving the electromagnetic method signal detection system to a new position along with the sparker source while keeping their positions relative to each other unchanged; and repeating the above process after the movement is completed. According to the technical solution of the present invention, fine electromagnetic detection results can be obtained while seismic detection is carried out.

Abstract: An executing mechanism for a rotary guide device includes a driving valve core, a driven valve core, a first cavity, a second cavity and a high-pressure slurry driving channel. The first cavity includes a first low-pressure port communicating with a low-pressure slurry; and a first high-pressure port communicating with a high-pressure slurry. The driving valve core adjusts a pressure in the first cavity; and the driven valve core moves in response to a pressure difference between the first cavity and the second cavity. The high-pressure slurry driving channel switches between an open state and a close state in response to movement of the driven valve core. A rotary guide device includes a rotary main shaft, a drill bit, a push mechanism, and the executing mechanism. The push mechanism includes a push block and a push plunger piston, the high-pressure slurry driving channel communicates with one end, distal from the push block, of the push plunger piston.

Abstract: A push type rotary guide drilling system includes a drill bit and a rotating shaft, the rotating shaft including an upper rotating shaft and a lower rotating shaft; a steering portion, sleeving an outer side of the rotating shaft; a push assembly, including a plurality of push pieces spaced along a circumferential direction of the steering portion; a transmission device, including a transmission mechanism for driving the push pieces to extend out of the steering portion, the transmission mechanism including a driving electromagnetic gear arranged on the upper rotating shaft and a driven electromagnetic gear arranged on the steering portion and further including a motion conversion unit converting rotary motion of the driven electromagnetic gear into linear motion of the push pieces; and a control unit. The control unit is configured to modulate a magnetic field to make the driving electromagnetic gear and the driven electromagnetic gear realize linkage through magnetic coupling.

Abstract: The present application relates to self-adjusting damping vibration absorbers, in particular to a self-adjusting damping vibration absorber for while-drilling instruments and an adjusting method thereof. The self-adjusting damping vibration absorber includes a vibration monitor and controller tool and a vibration absorber body. The vibration monitor and controller tool is mounted inside the downhole while-drilling instrument, one end of the vibration absorber body is connected to the vibration monitor and controller tool through an insulating connector, the joint is provided with an insulating pad, the other end is connected to a sensor or circuit board tool that needs vibration damping, and the inside of the vibration absorber body is provided with a damping adjustment layer made of an electroactive polymer. By controlling the magnitude of an applied voltage, the damping adjustment can be realized, and the damping adjustment layer has the characteristics of high response speed and high control precision.

Abstract: Disclosed is a data transmission method. The method includes: sending, instruction information of data transmission to a slave node in a preset first cycle; judging, by the slave node, whether data should be sent according to the instruction information of data transmission; sending the data to the a master node if the slave node judges that the data needs to be sent; and sending, by other slave nodes, the data sequentially to the master node according to a preset slave node priority, an electric potential condition and a data state of the other slave nodes in a preset second cycle. In a preset first cycle, data is actively requested from a slave node, and in a preset second cycle, other slave nodes can actively send the data to a master node according to a preset slave node priority, an electric potential condition and a data state of the other slave nodes.

Abstract: The present invention provides a rotary guiding tool, comprising: a power unit having an output shaft capable of outputting a torque and an offset driving portion capable of outputting a radial force and/or an axial force; a transmission shaft connected with the output shaft; a support shaft connected with the transmission shaft through a rotation structure, wherein a rotation axis of the rotation structure is perpendicular to an axis of the output shaft, the support shaft has an inner wall defining an accommodating cavity and a forward end and a rearward end formed at both ends of the accommodating cavity, a rotation center of the rotation structure is located in the accommodating cavity, and the rearward end of the support shaft is capable of being driven by the radial force output by the offset driving portion; and a drill bit having a drill bit tail end, wherein the drill bit and the forward end of the support shaft are connected to the drill bit tail end.

Abstract: A mounting and demounting control system is used for installing a radioactive source in nuclear logging instruments. In this system, a tail end of a truss manipulator is fixedly provided with a worktable through a bolt, a left side of an upper surface of the worktable is provided with a source capsule mounting and demounting manipulator, a right side is provided with a compression screw mounting and demounting manipulator, and the upper surface of the worktable close to the inner side of the two manipulators is respectively provided with opposed photoelectric sensors through bolts; four corners of the truss manipulator are fixed to a support through bolts, a beam is fixed between two legs at the front side of the support through bolts; and a positioning device is placed near the front of the support, and an upper part of positioning device is fixedly provided with an instrument.

Abstract: A mounting and demounting control system is used for installing a radioactive source in nuclear logging instruments. In this system, a tail end of a truss manipulator is fixedly provided with a worktable through a bolt, a left side of an upper surface of the worktable is provided with a source capsule mounting and demounting manipulator, a right side is provided with a compression screw mounting and demounting manipulator, and the upper surface of the worktable close to the inner side of the two manipulators is respectively provided with opposed photoelectric sensors through bolts; four corners of the truss manipulator are fixed to a support through bolts, a beam is fixed between two legs at the front side of the support through bolts; and a positioning device is placed near the front of the support, and an upper part of positioning device is fixedly provided with an instrument.

Abstract: The present invention discloses a method and apparatus for simulating and designing structural parameters of an air-core coil. The method for simulating and designing structural parameters of the air-core coil includes: building an impedance function of the air-core coil according to a structural parameter variable, the air-core coil being of a differential structure and being wound in a completely parallel winding fashion; building an index function of the air-core coil by calculating an equivalent bandwidth, sensitivity and an equivalent noise power spectrum by means of the impedance function. The method is intuitive, and makes calculation of the optimized technological and structural parameters easier and more convenient, thus reducing the amount of calculation and shortening the calculation time.

Abstract: The present application discloses a push type rotary guide drilling system.

Abstract: The present invention discloses a CSAMT transmitter, including: a first transmitter, where the first transmitter includes a first generator, a first rectifier module, a first transmission module, and a second transmission module, the first generator is connected to the first transmission module and the second transmission module by using the first rectifier module; and a second transmitter, where the second transmitter includes a second generator, a second rectifier module, a third transmission module, and a fourth transmission module, the second generator is connected to the third transmission module and the fourth transmission module by using the second rectifier module, where the first transmission module is connected to the third transmission module, and the second transmission module is connected to the fourth transmission module; the first transmission module has the same voltage as the third transmission module, and the second transmission module has the same voltage as the fourth transmission module.

Abstract: The disclosure pertains to the field of exploration based on electromagnetic method, and in particular relates to a method and device for surface-borehole transient electromagnetic detection, aiming at solving the problem that the loop source device cannot effectively detect the high-resistance layer. The device according to the disclosure includes grounded conductor wires as emission sources and underground receiving devices as receiving sources; wherein the grounded conductor wires are arranged on the ground; an existing borehole on the ground or an existing underground roadway is used, and receiving probes are arranged point by point in the borehole direction or in the horizontal direction of the roadway; the grounded conductor wires are composed of three sets of grounded conductor wires, wherein two sets of the grounded conductor wires are arranged in parallel with each other and perpendicular to the third set of the grounded conductor wires.

Abstract: An acoustic while drilling receiving transducer array adopts a full-digital structure and a non-oil-filled rubber encapsulation arrangement mode, and the full-digital device of the acoustic while drilling receiving transducer array includes first modules, configured to carry out acoustic-to-electric conversion on weakly received acoustic signals of strata; second modules, configured to carry out amplification, filtering, gain control and digital-to-analog conversion on the weakly received acoustic signals; and a third module, configured to control interfaces of the device and convert external input and output signals.