58results about How to "Improve logging efficiency" patented technology

The invention discloses a real-time compression method of three-dimensional sonic logging data, which comprises the following steps: dividing data to be compressed into data to be compressed, which have the length of m, by splitting original sonic data into retention data with a high n1 bit and the data to be compressed, which have a low n2 bit; then carrying out DCT (discrete cosine transformation) on the data to be compressed according to groups to obtain mapping data, quantifying the mapping data, i.e. retaining more bit numbers for the data with larger numerical value while retaining less bit numbers for the data with smaller numerical value, realizing the real-time compression of the data and coding the data after being quantified; and finally, merging the retention data with the high n1 bit in retention data number groups and the data after being coded so as to obtain compressed data. Therefore, the storage quantity and the transmission quantity of data are reduced, and the logging efficiency is enhanced.

The invention discloses a method for real-time compression of underground sound wave imaging log data. The method comprises the steps of dividing original underground sound wave imaging log data into a plurality of groups of data to be compressed, conducting lifting matrix-based integer disperse cosine transformation on each group of data to be compressed, and obtaining transform domain data of each group of data to be compressed; recording a first parameter, a second parameter and a third parameter of the transform domain data of each group of data to be compressed; conducting dynamic quantization processing and encoding operation on the transform domain data of each group of data to be compressed according to the first parameters, the second parameters and the third parameters. According to the method, real-time compression of log data can be achieved, data transmission quantity can be reduced, original sound wave imaging log data information can be saved completely, and then logging efficiency is improved.

The invention discloses a synchronous acquisition and processing system of weak signals of three-dimensional sound wave near-probe 104 channels. The system comprises one control panel and 13 identical acquisition panels. After receiving a command sent by a ground system, an acquisition control module in the control panel initializes the 13 acquisition panels and configures related parameters of the 13 acquisition panels, weak signal synchronous acquisition and processing modules of the acquisition panels carry out counting according to initial pulses and returned pulses to obtain delay time, and when it is detected that the acquisition control module sends out an acquisition starting command, the 13 acquisition panels are delayed by corresponding time respectively and collect and send sound wave data. The acquisition control module receives sound wave data of the 104 channels of the 13 acquisition panels, a sound wave real-time lossless compression module is used for lossless compressing the data in real time and uploading the compression result, so that more accuracy sound wave signals and interval transit time information are obtained, transmission quantity of the sound wave data is reduced, and well logging efficiency is greatly improved.

The invention discloses a system and a method for continuously measuring postures of a rigid bracket (100) at a gravity field by utilizing a two-axis gyroscope as well as a system and a method for measuring a wellbore track of an oil well. The system for continuously measuring the postures by utilizing the two-axis gyroscope comprises a gyroscope sensor (200), an accelerometer (300) and a calculation unit (500). According to the systems and the methods disclosed by the invention, the defects that a gyroscope point measurement operation is complicated and wastes time are overcome, and the disadvantages of continuous measurement of a three-axis gyroscope that the outer diameter is great and the hardware cost is high are avoided; the continuous measurement of the oil field track in a moving process of the rigid bracket (100) can be realized; and the well logging time is shortened, the well logging efficiency is improved and the manufacturing cost of hardware is reduced.

The invention provides logging equipment and a coring and sampling method. The logging equipment comprises a main body, a sampling mechanism, a coring mechanism and an electronic control device. The sampling mechanism comprises a probe and a first push and backup arm retractably arranged on the two opposite sides of the main body. The coring mechanism comprises a coring drilling bit and a second push and backup arm retractably arranged on the two opposite sides of the main body. The electronic control device is used for controlling the main body, the sampling mechanism and the coring mechanismto carry out the sampling and coring operations, wherein the second push and backup arm can be used as a reverse push and backup arm of the sampling mechanism, and the first push and backup arm can be used as a reverse push and backup arm of the coring mechanism. According to the logging equipment and the coring and sampling method, the logging equipment which can complete coring and sampling operations at the same time by going down to a well once is achieved, and the first push and backup arm and the second push and backup arm can be correspondingly used for carrying out reverse push and backup operations, and the self-clamping-removal operation in the coring and sampling process is realized respectively. The logging equipment is easy and convenient to operate, the logging efficiency iseffectively improved, and the cost is reduced.

The invention discloses a combined telescoping ram for a logging instrument. The telescoping ram comprises a protective cap, a lower core plug, and a shell. The technical points of the invention include: the shell comprises an upper shell, a lower shell, and a herringbone crawler, wherein an upper joint is connected between the upper shell and the protective cap; a power socket is arranged in the upper joint; the power socket is connected with a motor arranged in the upper shell; the motor is provided with a transmission assembly, a pressure balancing assembly, a hole diameter potentiometer assembly, a spring assembly and a hinge assembly downward in turn along the axial direction; the hinge assembly comprises a link span and upper and lower connecting rods; the upper and lower connecting rods are connected with a backup arm and a lower control arm respectively; the backup arm is connected with a polar plate bracket; a polar plate is arranged on the polar plane bracket; the polar plane bracket and the lower shell are both hinged with an upper arm; and the lower shell is connected with the lower core plug. The telescoping ram has the advantages of great improvement on logging efficiency and quality, stable and reliable working process, wide application range, simple structure, convenient use, capability of reducing maintenance cost, and the like.

The deep-well detection optical fibre transmission system includes surface instrument, cable, swivel, hoisting winch and downhole instrument. It also has surface optical terminal machine, electro-optic mixed cable, downhole electro-optic mixed cable coupling device and downhole optical terminal machine, the surface instrument is connected with surface optical terminal machine by means of cable and swivel, the electro-optic mixed cable is winded round hoisting winch, said electro-optical mixed cable ground surface end is connected with surface optical terminal machine, and its downhole end is connected with downhole optical terminal machine and downhole instrument by means of downhole electro-optical mixed cable coupling device.

The invention relates to a feller delimbing device comprising a base plate and mechanical arms. The mechanical arms are connected on the base plate through shafts; the mechanical arms are controlled to move through a driving motor and are in arc shapes; a cutting knife set is arranged in each mechanical arm and comprises two parallel knife columns; each knife column comprises a knife seat and blades, and the blades stretch out of the upper surfaces of the mechanical arms; each knife column can translate in a reciprocating mode in the face where the blades are located; a driving roller is arranged on the inner annular wall of each mechanical arm and can rotate freely around the axis of the driving roller; the outer wheel face of each driving roller is exposed out from the inner annular wall of the corresponding mechanical arm; each driving roller is engaged with a set of cutting wheels through transmission wheels; transmission rods are installed on the wheel edges of the cutting wheels in a hinged mode; and the tail ends of the transmission rods are hinged to knife seats. The feller delimbing device is novel and unique in structure and capable of removing a limb in flat and smooth modes, blade clamping is effectively prevented, and working efficiency is improved.

The invention discloses a method for compressing and decompressing acoustic logging data. The compressing method comprises the steps: conducting matrix partitioning on the data collected by an acoustic logging instrument according to the number of collection channels; carrying out discrete cosine transform on each block matrix to obtain a DCT coefficient matrix; designing an appropriate quantization matrix according to the characteristics of the sound wave signals, and quantizing the DCT coefficient matrix; carrying out run-length coding and Huffman coding on the quantized matrix; and obtaining a compressed code stream and transmitting the compressed code stream. According to the compressing method, on the basis that the calculation performance of a downhole main control device is improved, a high compression ratio is achieved. According to the method, the data can be compressed in real time downhole, and the data transmission amount is greatly reduced, so that the logging speed of the acoustic logging instrument is increased.

A production well resistivity logging device comprises a ground system connected with an underground logging deivce through a cable. The underground logging deivce comprises a centralizer located at two ends of the logging device. An upper polarizing coil is wound on the outer portion of an upper polarizing framework of an upper polarizing device and is connected with the output end of the an upper polarizing power supply, the upper polarizing power supply is connected with an upper polarizing detection unit, an emission control unit is connected with a magnetic field detection unit, and a receiving processing unit is connected with the magnetic field detection unit. A lower polarizing device symmetrical to the upper polarizing device and having the same structure with the upper polarizing deivce is arranged on the tail portion of the underground logging deivce. The upper polarizing device and the lower polarizing device are totally same in structure and are only reverse in connected-in current polarities that one polarizing device performs polarizing and the other polarizing device performs demagnetizing. The production well resistivity logging device ensures that a sleeve is not damaged in the measurement process and self characteristics of the sleeve are not affected after measurement, can fast detect characteristics of the stratum outside the sleeve, and has the advantages of being efficient, fast, convenient and free of contact.

The invention discloses a well logging robot system and a well logging method. A core analysis module and a fluid analysis module are arranged on two sides of a drilling measurement module, and the core analysis module is connected with a cable stuck releasing module through a first instrument stuck releasing module. The fluid analysis module is connected with a second instrument stuck releasing module through a fluid sampling module, the drilling measurement module is used for performing sidewall coring, rock breaking and deep drilling, measurement and formation testing, and the core analysismodule is used for measuring a core. The fluid analysis module is used for fluid analysis, and the fluid sampling module is used for fluid storage. The first instrument stuck releasing module and thesecond instrument stuck releasing module are used for axially moving the well logging robot system, and the cable stuck releasing module is used for performing jarring stuck releasing on a cable. Thewell logging robot system has a high function integration degree and reliable work and obviously improves the well logging efficiency.

The invention provides a sugarcane harvester header. The sugarcane harvester header comprises a frame, a header lifting mechanism, a double-staggering swing cutter mechanism, a sugarcane lifting device, a sugarcane shifting mechanism and a preliminary pressing-down and leaf-stripping mechanism and a traveling device, wherein the header lifting mechanism is mounted on the frame, the double-staggering swing cutter mechanism is mounted on the header lifting mechanism, the rear end of the sugarcane lifting rack of the sugarcane lifting device is fixedly connected with the lifting support of the header lifting mechanism, the sugarcane shifting mechanism is fixedly connected with the upper end of the sugarcane lifting rack of the sugarcane lifting mechanism through a reel support, the preliminary pressing-down and leaf-stripping mechanism is fixedly mounted above the sugarcane lifting rack through a bearing block, and the traveling device is mounted below the frame. The sugarcane harvester header is capable of achieving terrain-self-adaptation lifting, has functions of lifting lodging sugarcanes, performing preliminary sugarcane leaf stripping, shifting the sugarcanes and harvesting the sugarcanes, and is simple in structure and convenient to manufacture and maintain.

The invention relates to an automatic lifting overhead lumbering device which comprises an automobile, a cargo boom, a main winch, a self-falling holding claw, a fixed holding claw, a rotatable support I, a rotatable support II, a fixed support and an electric saw. The cargo boom is provided with a rotatable and telescopic hydraulic arm, the cargo boom and the main winch are mounted on a cargo boom control table, the control table is rotatably mounted on an automobile body, the fixed holding claw is mounted on the fixed support, the fixed support is hinged at the end of the cargo boom, a hinging angle of the fixed support is adjusted through a hydraulic rod, the self-falling holding claw is mounted in a fixed groove of the rotatable support II under traction of a main steel wire rope, themain steel wire rope drags the self-falling holding claw to fall, the bottom end of the rotatable support II is hinged onto the rotatable support I, the rotatable support I is rotatably mounted on theupper portion of the fixed support, and the electric saw is mounted between the fixed holding claw and the self-falling holding claw. According to the device, lumbering efficiency and safety are improved, labor cost is reduced, and impact damage of a fallen tree trunk to the ground is effectively prevented.

The invention belongs to the field of telecommunication digital information communication, and particularly relates to a method for recording and storing the event log contents of a computing process of a mobile host node and a partial order dependency relationship between event logs in a fault tolerant mobile computing system. The method comprises the following steps of: transmitting event information in the computing process to a node message processing mechanism by the mobile host node, and updating the total number of events in the computing process and the total number of non-deterministic events; transmitting the event information and the like to a local mobile support station; transmitting the event information to a log recording mechanism by a support station message processing mechanism, generating a corresponding log deterministic factor #e, and adding the #e into a one-dimensional array of a memory of the mobile support station or reliable storage equipment; and correcting the sequence of elements in the one-dimensional array according to the attached TEN and DEN. By the method, the contents of the events in the computing process of the mobile host node and the partial order dependency relationship can be accurately recorded, and the log recording efficiency of the mobile computing system can be effectively improved.

The invention relates to an orientation vertical seismic logging technology for pressing crack monitoring, and the technology employs an underground orientation module to upload an analog quantity to a pup joint of a multiage vertical seismic logging instrument, and then employs the pup joint for AD conversion and transmits the data to a remote pup joint. Afterwards, the data is transmitted to a ground collection system of the vertical seismic logging instrument for angle calculation, and finally the relative azimuth and well deflection of the instrument are calculated through operation software. The pressing crack monitoring process comprises the steps: placing the instrument at a specific depth, opening a supporting arm, employing PI vertical seismic section system software (certificate ID: 1232500) for data processing, obtaining the relative bearing of a scribed line of the pup joint with a higher edge, and collecting the well deflection of the pup joint; displaying and recording the relative bearing and well deflection of the pup joint in the software, and obtaining the initial data at the moment; finding an initial well depth through a ground depth system when the instrument is placed in a well again, comparing the well deflection and relative bearing data of the initial descending with the data, enabling the bearing to be equivalent to the initial descending direction through software correction, thereby achieving an effect that the instrument never leaves from the initial position.

The invention discloses an automatic logging machine, which includes a logging device, a transmission device, a push pincer, a vertical saw blade, a first horizontal saw blade, a second horizontal saw blade, a first chassis, a second chassis, etc., the logging device There are three vertical saw blades on the upper front; this automatic logging machine realizes the integration of tree cutting and transportation through the logging device and the transmission device, and realizes the flexible cutting of small-diameter trees and branches through the set vertical saw blades , the function of cutting the upper and lower kerfs of large-diameter trees is realized by setting the first transverse saw blade and the second transverse saw blade, and the function of pushing and hanging the trees is realized by the push pliers. The first rotating arm, the second rotating arm and the third rotating arm realize the adjustment of more degrees of freedom of the logging device. Compared with the existing logging equipment, the automation degree of the automated logging machine is higher, the logging efficiency is higher, and the function is stronger.

The invention discloses an easy-to-operate stump separating pneumatic axe. The easy-to-operate stump separating pneumatic axe comprises a fixing frame and an axe body, a fixing device is arranged in the outer side of the fixing frame, and a sliding rod penetrating through the fixing frame is arranged in front of the fixing device; a limiting plate is arranged in front of the sliding rod, and sharpthorns are arranged on the surface of the limiting plate; a pneumatic pump is arranged in the middle of a fixing plate, a handle is arranged on the pneumatic pump, and supporting columns are fixed tothe periphery of the pneumatic pump; a damping pad is arranged on the lower surface of each supporting column, a pneumatic rod is connected with the lower portion of the pneumatic pump, and the axe body is arranged below the pneumatic rod; a convex column is fixed to the surface of a sliding rod, a through hole is formed in the fixing frame, and grooves are formed in the periphery of the throughhole. The axe body of the easy-to-operate stump separating pneumatic axe can conduct continuous downward impact under the acting force of the pneumatic pump, so that a stump is separated, the cuttingefficiency is improved, and the situation that manpower is needed for cutting and separation in the prior art is changed.

The invention relates to a small-diameter micro-resistivity scanning imager. The small-diameter micro-resistivity scanning imager comprises a main rod piece and a plurality of acquisition modules arranged around the main rod piece in the circumferential direction, one ends of the acquisition modules are hinged to main arms, the other ends of the acquisition modules are hinged to auxiliary arms, the ends, away from the acquisition modules, of the main arms are hinged to the main rod piece, a mounting chamber is arranged in the main rod piece, a push-pull device is arranged in the mounting chamber, a part in the push-pull device extends out of the mounting chamber to be connected with the main arms so as to drive the main arms to rotate around the hinged positions between the main arms and the main rod piece, sliding pieces are hinged to the ends, away from the acquisition modules, of the auxiliary arms, the sliding pieces are slidably connected to the main rod piece in the length direction of the main rod piece, stability maintaining devices are connected to the sliding pieces, the stability maintaining devices apply force to the auxiliary arms to rotate around the hinged positions between the auxiliary arms and the sliding pieces in the direction away from the main rod piece, the acquisition modules are located between the push-pull device and the sliding pieces, and the main rod piece is provided with a hydraulic balancing device used for balancing the pressure intensity of liquid inside and outside the mounting chamber. The small-diameter micro-resistivity scanning imager has the advantages that well logging can be conducted in the descending process and the lifting process.

The invention discloses a sampling resistor-based well logging during drilling instrument protecting device which comprises a circuit board, wherein a sampling resistor, a voltage comparator, a single-chip microcomputer and an MOS switch module are arranged on the circuit board; the sampling resistor is connected with a power supply interface of an underpit petroleum logging instrument, the voltage comparator is connected with the sampling resistor, and the single-chip microcomputer is connected with the voltage comparator and the MOS switch module. Via an over-current protection device of the well logging during drilling instrument protecting device, a circuit of the petroleum logging instrument can be timely turned off and be protected when a system work current suddenly increases in underpit well drilling processes; when the current is back to normal, the single-chip microcomputer automatically controls a relay device to switch on the circuit, electric power can be supplied to the circuit normally, and manual fuse wire replacement is not needed; manpower and material resource cost can be saved, and petroleum logging efficiency can be greatly improved.

The invention belongs to the technical field of underground logging instruments, and particularly relates to a water injection well array gamma logging device and an in-layer subdivision logging method. The water injection well array gamma logging device comprises at least one subdivision layer gamma array short section, at least one azimuth gamma array short section, a cable head and a magnetic positioner, wherein at least two first gamma probes are vertically arranged on each subdivision layer gamma array short section; and each azimuth gamma array short section comprises a shell, at least two groups of gyroscopes and at least two groups of second gamma probes, and the gyroscopes and the second gamma probes are arranged in the shells. The technical problems that in the prior art, detection description cannot be carried out on a subdivision layer of a water injection well, and meanwhile detection description cannot be carried out in the circumferential direction and the multidirectional direction in the well at the same time are solved, and the inter-well connectivity detection efficiency is remarkably improved.

The invention provides a sugarcane harvester header. The sugarcane harvester header comprises a frame, a header lifting mechanism, a double-staggering swing cutter mechanism, a sugarcane lifting device, a sugarcane shifting mechanism and a preliminary pressing-down and leaf-stripping mechanism and a traveling device, wherein the header lifting mechanism is mounted on the frame, the double-staggering swing cutter mechanism is mounted on the header lifting mechanism, the rear end of the sugarcane lifting rack of the sugarcane lifting device is fixedly connected with the lifting support of the header lifting mechanism, the sugarcane shifting mechanism is fixedly connected with the upper end of the sugarcane lifting rack of the sugarcane lifting mechanism through a reel support, the preliminary pressing-down and leaf-stripping mechanism is fixedly mounted above the sugarcane lifting rack through a bearing block, and the traveling device is mounted below the frame. The sugarcane harvester header is capable of achieving terrain-self-adaptation lifting, has functions of lifting lodging sugarcanes, performing preliminary sugarcane leaf stripping, shifting the sugarcanes and harvesting the sugarcanes, and is simple in structure and convenient to manufacture and maintain.

The invention discloses an optical fiber logging data transmission system based on a TCP / IP protocol and a working method thereof, and belongs to the technical field of petroleum and natural gas exploration and development. The system comprises a control and acquisition module, a power supply module, an auxiliary signal measurement module and a photoelectric conversion module which are arranged ona well, a logging torpedo connector arranged under the well, and a photoelectric slip ring and a photoelectric composite cable which are used for connecting the well part and the underground part. Anopen type informatization network logging platform is constructed by applying high-speed optical cable communication and Ethernet bus technologies, transmission of logging operation optical signals is achieved, the logging data transmission rate is increased to 100 Mbps from 1 Mbps, the technical bottleneck of cable data transmission is thoroughly solved, a technical support is provided for research and development of a new generation of array imaging instruments, and the logging data transmission rate is increased to 100 Mbps from 1 Mbps. The measurement precision, the information amount, the image resolution and the logging speed of the instrument are improved, the well occupation time is reduced, the operation risk is reduced, and the production efficiency is improved.

The invention discloses a sandstone type uranium mine drilling transient electromagnetic logging device. The device comprises an exploring tube, a transmitting device arranged in the exploring tube, receiving devices, an internal connecting piece and an external connecting piece; the transmitting device is located in the middle of the interior of the exploring tube; the four receiving devices are distributed at the two ends of the transmitting device respectively; the transmitting device and the receiving devices are jointly and fixedly connected to the internal connecting piece; the transmitting device and the receiving devices are connected to the external connecting piece through the internal connecting piece. The logging device is based on the full-space transient electromagnetic detection principle, a detection coil is arranged perpendicular to a drill hole, the detection coil is well coupled with a geologic body, and metal interference is avoided; a one-transmitting and multi-receiving device mode is adopted, the detection mode is flexible, geologic bodies of different depths can be subjected to multiple coverage detection; a magnetic core is added into the detection coil, so that the induction signal strength can be effectively improved, the signal-to-noise ratio can be improved, and the electromagnetic field response characteristics of the geologic bodies on the periphery of a hole wall can be obtained.

The invention discloses a circuit protection device for a logging-while-drilling instrument, which includes a casing, a circuit board, a first joint, a second joint and a cover plate; a current detection module, a logic gate circuit and a relay are arranged on the circuit board, wherein the current The detection module is used for measuring the output current of the power supply interface of the downhole petroleum well logging instrument; the logic gate circuit is respectively connected with the current detection module and the relay. Through the overcurrent protection device of the present invention, the petroleum logging instrument can disconnect the circuit in time to protect the petroleum logging instrument when the working current of the system suddenly increases during downhole drilling. It will automatically control the relay to resume conduction, so that the circuit can be powered normally, and there is no need to manually replace the fuse, which saves manpower and material costs and greatly improves the efficiency of oil logging.

The invention discloses a novel multifunctional logging robot. Firstly, a large gear I drives a pinion I to rotate, a large gear II drives a pinion II to rotate, a large gear III drives a pinion III to rotate, and then a bevel gear I drives a bevel gear II to rotate, a worm I and a worm II respectively drive a turbine I and a turbine II to rotate, and finally, a bevel gear III and a bevel gear IVrespectively drive a bevel gear V and a bevel gear VI to rotate, thereby driving a saw blade I and a saw blade II to realize the logging function. The robot has the functions of lighting, safety monitoring, solar energy storage, power supply and electric charging. The robot also realizes the function of high-altitude trimming, specifically, a hydraulic cylinder is started, a rotor is raised from acylindrical groove to a specified height, and then a rotor motor is started to drive the rotor to rotate at a specified speed, thereby lifting a robot body off the ground to a designated position forachieving high-altitude trimming.

The invention relates to the technical field of pine wood processing, in particular to a pine wood processing system. The pine wood processing system comprises pine felling equipment, a pine wood conveying box, a pine wood storage box, a pine wood soaking box, a pine wood freezing box, a pine wood drying box, a pine wood coating supporting frame and a pine wood cutting device and is characterizedby comprising supporting bases, wherein moving wheels are arranged at the bottom of the supporting bases, supporting columns are arranged above the supporting bases, lifting springs are arranged in the supporting columns, and lifting plates are arranged above the lifting springs. According to the pine wood processing system, supporting is carried out through the supporting columns, lifting controlis carried out at the same time, lifting adjustment is carried out according to the actual requirements, supporting is carried out through the supporting bases, moving is carried out through the moving wheels, meanwhile, moving is carried out according to the actual conditions, rotation is carried out through rotary saw plates, and therefore the use flexibility is improved, the felling efficiencyis improved, and meanwhile the operation flexibility is improved.

The invention discloses a remotely updating device of an EDIB (Electronic Data Interchange Bus) based down-hole program. In a ground logging system, an updating program is compiled as a target file of .out by CCS (Compiling Program Software); in a program processing module, the program is analyzed and extracted to be changed into hexadecimal data and then is encapsulated; in a data transmission module, Manchester encoding is performed, a differential signal outputted after encoding is driven, isolated, coupled and outputted to the EDIB. In a down-hole apparatus, the differential signal on the EDIB is coupled, linearly received and reshaped in a data receiving module, and outputted to FPGA (Field Programmable Gate Array) for Manchester encoding so as to restore the hexadecimal encapsulated data; a program updating module extracts the hexadecimal data from the hexadecimal encapsulated data, restores the hexadecimal data as an object code capable of being identified by DSP Boot Loader and then writes the restored hexadecimal data in a program storage via a programming library function so as to update the program of a down-hole apparatus. Without influencing on the normal logging work, the ground system and the down-hole apparatus are reconstructed to improve the logging efficiency.

The invention discloses a method for real-time compression of downhole acoustic wave imaging logging data. The method comprises the following steps: dividing the original downhole acoustic wave imaging logging data into multiple sets of data to be compressed, and carrying out lifting matrix-based lifting matrix compression for each set of data to be compressed. Integer discrete cosine transform, and obtain the transform domain data of each group of data to be compressed; record the first parameter, the second parameter and the third parameter of the transform domain data of each group of data to be compressed; according to the first parameter, the second The second parameter and the third parameter perform dynamic quantization processing and encoding operations on the transform domain data of each group of data to be compressed. The invention can realize real-time compression of logging data. In addition, the data transmission amount can be reduced through the invention, and the original acoustic wave imaging logging data information can be completely preserved, thereby improving the logging efficiency.

The invention discloses a protecting device for an oil well low-pressure tester. The protecting device comprises a pneumatic wellhead connector with a handle. A biased microphone mounting rack matchedwith a polyvinylidene fluoride piezoelectric film microphone is fixed to the upper end of the pneumatic wellhead connector. A connector for allowing a soundless missile oil well low-pressure tester mainframe to be inserted is arranged on the opposite side of the biased microphone mounting rack, a door for protecting the soundless missile oil well low-pressure tester mainframe is arranged on the outer side of the connector, and a coded lock device is mounted on the door. The soundless missile oil well low-pressure tester can be directly connected to a wellhead and then applied, thus the characteristics of small size and convenient data collection are achieved, the well logging efficiency of the soundless missile oil well low-pressure tester is improved to a certain extent, and the application range of the tester is expanded.

The invention discloses a method for calculating the quantitative conversion coefficient of uranium ore based on the combination of natural γ energy spectrum logging multi-characteristic peaks. At 400 keV, the γ all-energy peak with a high probability of photon decay and no overlapping adjacent peaks is used as the characteristic peak for the calculation of the uranium content conversion factor. The combination of multiple characteristic peaks is used to obtain the quantitative conversion factor of uranium ore. Using this method to perform natural gamma energy spectrum logging in uranium mines has high relative measurement accuracy and can improve the efficiency of natural gamma energy spectrum logging in uranium mines.