CN107083955B - High-temperature high-pressure digital geothermal logging system - Google Patents
High-temperature high-pressure digital geothermal logging system Download PDFInfo
- Publication number
- CN107083955B CN107083955B CN201710265056.3A CN201710265056A CN107083955B CN 107083955 B CN107083955 B CN 107083955B CN 201710265056 A CN201710265056 A CN 201710265056A CN 107083955 B CN107083955 B CN 107083955B
- Authority
- CN
- China
- Prior art keywords
- pressure
- cylindrical section
- sealing
- section
- heat
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/06—Measuring temperature or pressure
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/01—Devices for supporting measuring instruments on drill bits, pipes, rods or wirelines; Protecting measuring instruments in boreholes against heat, shock, pressure or the like
- E21B47/017—Protecting measuring instruments
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/06—Measuring temperature or pressure
- E21B47/07—Temperature
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/10—Geothermal energy
Abstract
The invention relates to a high-temperature high-pressure digital geothermal logging system, which is characterized in that: the device comprises a pressure-bearing outer pipe and a heat-insulating inner pipe which are coaxially arranged, wherein one end of the pressure-bearing outer pipe is completely sealed by a lower joint of an instrument, the other end of the pressure-bearing outer pipe is sealed by an upper joint of the instrument, one end of the heat-insulating inner pipe is sealed, the other end of the heat-insulating inner pipe is sealed by an upper joint of the instrument and a joint of a temperature sensor, a measuring assembly is arranged in the heat-insulating inner pipe, and the measuring assembly comprises a temperature sensor, a pressure sensor, a NaI crystal and a photomultiplier. According to the invention, well temperature logging, pressure logging and gamma ray logging can be simultaneously carried out, so that various parameters can be measured more comprehensively, and the pressure-bearing outer pipe and the heat-insulating inner pipe form an independent sealing cavity respectively; the inner and outer heat insulation and pressure isolation of the heat preservation inner pipe are smoothly realized, the reliable working temperature range reaches minus 10 ℃ to plus 250 ℃, the bearing pressure reaches 55 MPa, and the logging under the working conditions of high temperature and high pressure is smoothly realized.
Description
Technical Field
The invention relates to a logging instrument, in particular to a high-temperature digital geothermal logging system.
Background
Logging, also known as geophysical logging or mining geophysical, is one of the methods of applying geophysical (including heavy, magnetic, electric, seismic, nuclear) and is a method of measuring geophysical parameters using the electrochemical properties, conductive properties, acoustic properties, radioactivity, etc., of the formation.
Well logging methods come in a wide variety of ways, such as well temperature logging, natural gamma logging, neutron logging, acoustic logging, well deviation logging, formation pressure logging, and the like. During logging, various logging instruments manufactured by utilizing physical principles of electricity, magnetism, sound, heat, nuclear and the like are put into a well by logging cables, so that the surface electric logging instrument can continuously record various parameters changing along the well shaft along with the depth, and the physical characteristics of the underground rock stratum are indirectly identified by combining the physical parameters of the underground rock stratum through curves representing the parameters.
Logging is an important method technology for exploration and development of oil and gas fields, and plays a great role in the whole process of oil and gas exploration, development and production. However, with advances in technology and development of logging applications, logging techniques and equipment are also continually being developed.
For example, with geothermal resource development, potable water resource development, and various well construction engineering needs in recent years, conventional well logging methods such as well temperature, pressure, and well temperature gradient have become more and more important.
However, when the well temperature logging instrument and the pressure logging instrument are applied to the development of geothermal resources and drinking water resources, the temperature working range of the well temperature logging instrument is between-5 ℃ and 210 ℃ and the pressure working range of the pressure logging instrument is between 0MPa and 40MPa due to the structural design limitation, and the problems that the well temperature logging instrument and the pressure logging instrument cannot work normally, the measurement data error is large and the like easily occur when the well temperature logging instrument and the pressure logging instrument are used in the field, and the requirement of logging cannot be met. Therefore, development of a novel high-temperature high-pressure digital geothermal logging system is imperative.
Disclosure of Invention
The invention aims to provide a digital geothermal well logging system capable of smoothly logging under high-temperature and high-pressure environments.
In order to solve the technical problems, the technical scheme of the invention is as follows: a high-temperature high-pressure digital geothermal logging system is characterized in that: comprising
The inner wall of the first end of the pressure-bearing outer tube is sequentially provided with a seal fit section and an internal thread section from the first end to the second end, the inner diameter of the seal fit section of the pressure-bearing outer tube is recorded as R1, the major diameter of the internal thread section of the pressure-bearing outer tube is recorded as R2, R1 is more than R2, and the second end of the pressure-bearing outer tube is provided with a tail internal step hole;
The instrument lower joint is used for sealing the second end of the pressure-bearing outer tube and is provided with an annular boss which can be just embedded into the tail inner step hole, and the annular boss is welded and fixed with the pressure-bearing outer tube after being embedded into the tail inner step hole of the pressure-bearing outer tube to realize sealing of the second end of the pressure-bearing outer tube;
the heat-insulating inner tube is arranged in the pressure-bearing outer tube in a coaxial manner, is of a tube body structure with a circular cross section, and is limited to be a third end at one end along the extending direction of the axis of the tube body and a fourth end with a closed end at the other end; the third end of the heat-insulating inner tube is close to the first end of the pressure-bearing outer tube and is positioned at the internal thread section of the pressure-bearing outer tube, the fourth end of the heat-insulating inner tube is close to the second end of the pressure-bearing outer tube, and the end face of the fourth end abuts against the end face of the annular boss of the lower joint of the instrument to limit the fourth end of the heat-insulating inner tube;
the compression nut is provided with an external thread section which can be matched with the internal thread section of the pressure-bearing outer pipe, the center of the compression nut is provided with a round hole with the diameter larger than the inner diameter of the heat-insulating inner pipe, and the end face of the compression nut is provided with a through connecting hole; the compression nut is in threaded connection with the pressure-bearing outer tube through the inner thread section and the outer thread section and props against the end face of the third end of the heat-insulating inner tube to realize the limit of the third end of the heat-insulating inner tube;
The instrument upper joint is of a stepped revolving body structure coaxially arranged with the pressure-bearing outer tube, one end of the instrument upper joint in the extending direction along the axis of the instrument upper joint is defined as a fifth end, and the other end of the instrument upper joint is defined as a sixth end; the outer surface of the step-shaped revolving body structure is sequentially provided with a first outer cylindrical section, an outer guiding conical section, a disassembly cylindrical section, a first sealing cylindrical section, a first transition cylindrical section, a first locking cylindrical section, a second sealing cylindrical section and a heat insulator connecting cylindrical section from a fifth end to a sixth end along the axis direction of the outer surface; a plurality of first sealing grooves extending along the circumferential direction of the outer ring are uniformly distributed on the outer ring of the first sealing cylindrical section along the axial direction of the outer ring, an external thread section which can be matched with the internal thread section of the pressure-bearing outer pipe is arranged on the outer ring of the first locking cylindrical section, a plurality of second sealing grooves extending along the circumferential direction of the outer ring are uniformly distributed on the outer ring of the second sealing cylindrical section along the axial direction of the outer ring, and a heat insulation sleeve connecting hole is drilled on the outer ring of the heat insulation body connecting cylindrical section; the outer diameter of the disassembly cylindrical section is recorded as R3, the outer diameter of the first sealing cylindrical section is recorded as R4, the outer diameter of the transition cylindrical section is recorded as R5, the large diameter of the external thread section of the first locking cylindrical section is recorded as R6, the outer diameter of the second sealing cylindrical section is recorded as R7, the outer diameter of the insulator connecting cylindrical section is recorded as R8, R3 is more than R4 is more than R6 is more than R5 is more than R7 and more than R8, the outer diameter R4 of the first sealing cylindrical section is matched with the sealing matching section R1 of the pressure-bearing outer pipe, and the outer diameter R7 of the second sealing cylindrical section is matched with the inner diameter of the heat preservation inner pipe; the step surface between the disassembly cylindrical section and the first sealing cylindrical section is propped against the first end surface of the pressure-bearing outer pipe, the first sealing cylindrical section is just embedded into the sealing matching section of the pressure-bearing outer pipe, and a first sealing ring group is embedded into an annular cavity formed between the first sealing groove of the first sealing cylindrical section and the sealing matching section; the first locking cylindrical section is matched with the internal thread section of the pressure-bearing outer pipe for locking to realize the connection and fixation of the upper joint of the instrument and the pressure-bearing outer pipe; the second sealing cylindrical section is just embedded into the inner wall of the third end of the heat-insulating inner pipe after passing through the central round hole of the compression nut, and a second sealing ring group is embedded into an annular cavity formed between the second sealing groove of the second sealing cylindrical section and the inner wall of the heat-insulating inner pipe; the insulation sleeve is sleeved outside the insulation body connecting cylindrical section and is fixed on the insulation body connecting cylindrical section through a screw in threaded connection with the insulation sleeve connecting hole; the center of the stepped rotary body structure is provided with a sealing fit round hole section, a locking round hole section, a first transition round hole section, a taper hole section and a second transition round hole section in sequence from a fifth end to a sixth end along the axis direction of the stepped rotary body structure, and the locking round hole section is provided with internal threads;
The sensor connector is sequentially divided into a lifting ring connecting part, a measuring part and an upper connector connecting part along the axis direction of the sensor connector, the lifting ring connecting part is fixedly connected with a lifting ring through threads, the measuring part is provided with a measuring cavity which radially extends along the sensor connector and penetrates through the side wall of the sensor connector, a temperature sensor mounting cavity and a pressure sensor mounting cavity are arranged in the upper connector connecting part, one end of the temperature sensor mounting cavity and one end of the pressure sensor mounting cavity are communicated with the measuring cavity, and the other end of the temperature sensor mounting cavity penetrates through the shaft end face of the upper connector connecting part;
the outer surface of the upper joint connecting part is a stepped revolving body, the upper joint connecting part is sequentially provided with a second outer cylindrical section, a third sealing cylindrical section and a second locking cylindrical section from the side of the lifting ring connecting part to the side of the upper joint connecting part along the axis direction of the upper joint connecting part, a plurality of third sealing grooves extending along the circumferential direction of the outer ring are uniformly distributed on the outer ring of the third sealing cylindrical section along the axis direction of the upper joint connecting part, an outer threaded section capable of being matched with the inner threads of the locking round hole section of the upper joint of the instrument is arranged on the outer ring of the second locking cylindrical section, the outer diameter of the second outer cylindrical section is recorded as R9, the outer diameter of the third sealing cylindrical section is recorded as R10, the major diameter of the outer threaded section of the second locking cylindrical section is recorded as R11, R9 is more than R10 and more than R11, the step surface between the second outer cylindrical section and the third sealing cylindrical section is propped against the fifth end surface of the upper joint of the instrument, the third sealing cylindrical section is just embedded into the sealing matching round hole section of the upper joint of the instrument, a third group is embedded into an annular cavity formed between the third sealing groove of the third sealing cylindrical section and the sealing matching round hole section, and the sealing round hole section of the third sealing cylindrical section is matched with the outer sealing round hole section to realize the locking of the instrument;
The measuring assembly mainly comprises a NaI crystal, a photomultiplier, a main circuit board, a power board, a WIFI module, a lithium battery, a temperature sensor and a pressure sensor, wherein the NaI crystal, the photomultiplier, the main circuit board, the power board, the WIFI module, the lithium battery are arranged in a protection Wen Naguan; the NaI crystal, the photomultiplier, the main circuit board, the power panel, the WIFI module and the lithium battery are sequentially arranged on the axis of the heat-preserving inner tube from the fourth end to the third end, and the main circuit board is provided with a micro-processing unit, a discriminator, an amplifier and a digital-to-analog conversion module; the photomultiplier is provided with a photocathode, an anode and a multiplier stage, the photocathode is closely arranged on one side of the NaI crystal, the multiplier stage is powered by a lithium battery through a power panel, and the anode sequentially outputs a pulse current signal to the micro-processing unit through an amplifier and a discriminator; the WIFI module is connected to the micro-processing unit through a wiring and a main circuit board and comprises an antenna base, an antenna transmitting board, a power switch and a charging socket; the temperature sensor is hermetically arranged in a temperature sensor mounting cavity of the sensor connector, the head of the temperature sensor extends into the measuring cavity, and the tail of the temperature sensor is connected with a digital-to-analog conversion module on the main circuit board through a wiring; the pressure sensor is arranged in a pressure sensor mounting cavity of the sensor connector in a sealing mode, the head of the pressure sensor extends into the measuring cavity, and the tail of the pressure sensor is connected with a digital-to-analog conversion module on the main circuit board through a wiring.
Preferably, the measuring assembly further comprises a first inner heat absorber, a second inner heat absorber, an upper heat absorber and a lower heat absorber, wherein the upper heat absorber is arranged between the heat absorber and the lithium battery, the first inner heat absorber is arranged between the WIFI module and the main circuit board, the second inner heat absorber is arranged between the main circuit board and the power supply board, and the lower heat absorber is arranged between the NaI crystal and the fourth end of the heat insulation inner tube.
Preferably, the NaI crystal and the photomultiplier are sequentially arranged in an inner sleeve, one end of the inner sleeve is fixedly connected with the lower heat absorber through a centralizing joint, and the other end of the inner sleeve is connected with a power supply board through another joint; one end of the photomultiplier, which is far away from the NaI crystal, is provided with a photomultiplier tube seat, a spring positioning sleeve is arranged on the photomultiplier tube seat, an anti-vibration spring is sleeved on the spring positioning sleeve, and the other end of the anti-vibration spring is propped against the end part of the inner sleeve.
Preferably, an anti-seismic sponge and a rubber pad are arranged between the centralizing joint and the inner sleeve.
Preferably, a sensor joint dismounting hole is drilled on the outer surface of the lifting ring connecting part of the sensor joint.
Preferably, an upper joint dismounting hole is drilled on the outer surface of the dismounting cylindrical section of the upper joint of the instrument.
The invention has the advantages that:
(1) In the invention, a small time constant PT1000 platinum resistor exposed on a sensor joint is adopted as a temperature sensor, so that the temperature change in a borehole can be responded quickly, and a temperature signal is subjected to digital-to-analog conversion and then is measured and processed by a micro-processing unit, thereby realizing temperature logging; the micro-processing unit carries out correction calculation through an output signal of the pressure sensor, an output signal of the built-in temperature sensor and a secondary calibration equation to finally obtain an actual pressure value and realize high-precision pressure logging;
the natural gamma detector is composed of NaI crystals and photomultiplier tubes, positive voltage is added to each multiplier electrode of the photomultiplier tubes, the NaI crystals emit photons under the excitation of gamma rays, the photons are beaten on the photocathode of the photomultiplier tubes to enable the photons to emit photoelectrons, the photoelectrons are continuously accelerated to proliferate under the action of each dynode of the photomultiplier tubes, finally pulse current with enough amplitude is formed at the anode of the photomultiplier tubes, then the pulse current is amplified by a preamplifier, selected by a discriminator and output to a micro-processing unit (MCU) for counting treatment, and gamma ray detection is realized;
The whole logging system can simultaneously perform well temperature logging, pressure logging and gamma ray logging, is favorable for more comprehensively measuring various parameters and comprehensively evaluating geological conditions, and can reduce the number of times of well logging and improve the working efficiency;
(2) The integrated single-cylinder structure is adopted, so that each measuring device such as a temperature sensor, a pressure sensor, naI crystals, a photomultiplier and the like is positioned in the same cylinder body and is designed in a balanced and dispersed manner according to heating power consumption, meanwhile, the measuring assembly positioned in the heat-preserving inner tube also comprises a plurality of heat absorbers distributed among each measuring device, and the heat absorbers can absorb heat generated in the working process of the measuring assembly within a certain time; therefore, the heating power consumption is absorbed in a dispersed and balanced way, and the consistency of the temperature distribution in the storage is ensured, so that the working efficiency of the heat capacity of the heat absorbing body is improved, the reliability of the instrument is prevented from being reduced due to overhigh local temperature, and favorable conditions are provided for geothermal logging under high-temperature and high-pressure conditions;
(3) According to the invention, the heat-insulating inner pipe is fixed in the pressure-bearing outer pipe through the cooperation of the compression nut and the instrument lower joint, the upper end (namely the third end) of the heat-insulating inner pipe is matched with the pressure-bearing outer pipe through the instrument upper joint to realize sealing, and a multi-step revolving body structure is adopted on the instrument upper joint, a plurality of sealing groove groups and sealing rings arranged on the multi-step revolving body structure are respectively matched with the pressure-bearing outer pipe and the heat-insulating inner pipe in a sealing way, and meanwhile, the lower end (namely the second end) of the pressure-bearing outer pipe and the lower end (namely the fourth end) of the heat-insulating inner pipe are closed, so that the pressure-bearing outer pipe and the heat-insulating inner pipe respectively form an independent sealing cavity; and further, the measuring devices in the heat-insulating inner pipe are sealed in the two shells, double protection is realized, heat insulation and pressure insulation of the inner and outer parts of the heat-insulating inner pipe are smoothly realized, the logging system can normally work in a high-temperature high-pressure environment, the reliable working temperature range reaches-10 ℃ -250 ℃, the bearing pressure reaches 55 MPa, and logging under high-temperature and high-pressure working conditions is smoothly realized.
(4) NaI crystal, photomultiplier are set up to an interior sleeve pipe to it has buffer components such as antidetonation spring, antidetonation sponge to fill, avoids the logging instrument to meet violent striking at the in-process of going into the well and influences its normal work, further promotes equipment operational reliability.
Drawings
FIG. 1 is a schematic diagram of a high temperature, high pressure digital geothermal logging system according to the present invention.
FIG. 2 is a schematic view of the structure of the pressure-bearing outer tube of the present invention.
Fig. 3 is a partial enlarged view a in fig. 2.
Fig. 4 is a partial enlarged view B in fig. 2.
FIG. 5 is a schematic view of the lower joint structure of the instrument according to the present invention.
FIG. 6 is a schematic view of the structure of the upper joint of the instrument according to the present invention.
Fig. 7 is a schematic view of a sensor connector and a hanging ring according to the present invention.
FIG. 8 is a schematic diagram showing the connection of the heat-preserving inner pipe, the pressure-bearing outer pipe, the upper joint of the instrument and the joint of the sensor.
FIG. 9 is a schematic diagram of a measuring assembly according to the present invention.
Fig. 10 is a schematic diagram of a measurement assembly according to the present invention.
FIG. 11 is a schematic diagram of a NaI crystal and photomultiplier tube of the present invention employing an anti-shock buffer structure.
Detailed Description
As shown in fig. 1, the device comprises a pressure-bearing outer tube 1, an instrument lower joint 2, a heat-insulating inner tube 3, a compression nut 4, an instrument upper joint 5, a sensor joint 6 and a measuring assembly, and specifically comprises:
Pressure-bearing outer tube 1: the inner part of the whole logging system is used for protecting the inner part of the whole logging system from collision and bearing high temperature and high pressure, as shown in figures 2, 3 and 4, the pressure-bearing outer tube 1 is of a tube body structure with a circular cross section, one end of the pressure-bearing outer tube 1 in the extending direction along the axis of the tube body is defined as a first end, the other end is a second end, a seal fit section 11 and an internal thread section 12 are sequentially arranged on the inner wall of the first end of the pressure-bearing outer tube from the first end to the second end, the inner diameter of the seal fit section 11 of the pressure-bearing outer tube 1 is recorded as R1, the major diameter of the internal thread section 12 of the pressure-bearing outer tube 1 is recorded as R2, R1 is more than R2, and the second end of the pressure-bearing outer tube 1 is provided with a tail inner step hole 13.
Instrument lower joint 2: the lower instrument joint 2 is provided with an annular boss 21 which can be just embedded into a tail inner step hole, and the annular boss 21 is embedded into the tail inner step hole 13 of the outer pressure-bearing tube 1 and then welded and fixed with the outer pressure-bearing tube 1 to realize the sealing of the second end of the outer pressure-bearing tube 1, in the embodiment, the main body of the lower instrument joint 2 is of a conical structure with a smooth end part, so that the whole logging system is smoother in the well descending process.
Heat preservation inner tube 3: the main testing device is used for accommodating a logging system and isolating the outside temperature; the heat-insulating inner tube 3 is coaxially arranged in the pressure-bearing outer tube, the heat-insulating inner tube 3 is also of a tube body structure with a circular cross section, one end of the heat-insulating inner tube 3 in the extending direction along the axis of the tube body is defined as a third end, and the other end of the heat-insulating inner tube 3 is defined as a fourth end with a closed end;
When the heat-insulating inner pipe 3 is installed in the pressure-bearing outer pipe 1, the third end of the heat-insulating inner pipe is close to the first end of the pressure-bearing outer pipe 1 and is positioned at the internal thread section 12 of the pressure-bearing outer pipe 1, the fourth end of the heat-insulating inner pipe 3 is close to the second end of the pressure-bearing outer pipe 1, and the end face of the fourth end abuts against the end face of the annular boss 21 of the instrument lower joint 2 so as to limit the fourth end of the heat-insulating inner pipe 3.
Compression nut 4: the heat-insulating inner pipe is fixed in the pressure-bearing outer pipe 1 by being matched with the instrument lower joint 2, the compression nut 4 is provided with an external thread section which can be matched with the internal thread section 12 of the pressure-bearing outer pipe 1, the center of the compression nut 4 is provided with a round hole, the diameter of the round hole is larger than the inner diameter of the heat-insulating inner pipe 3, and the end face of the compression nut 4 is provided with a through connecting hole; the compression nut 4 is in threaded connection with the pressure-bearing outer tube 1 through the inner thread section and the outer thread section and props against the third end face of the heat-insulating inner tube 3 to realize the third end limit of the heat-insulating inner tube.
Instrument upper joint 5: the upper joint 5 of the instrument is a step-shaped revolving body structure coaxially arranged with the pressure-bearing outer tube, and is used for sealing the upper end (first end) of the pressure-bearing outer tube 1 and realizing the sealing of the heat-insulating inner tube 3, as shown in fig. 6, and one end of the upper joint of the instrument in the extending direction along the axis of the tube body is defined as a fifth end, and the other end is defined as a sixth end;
The outer surface of the step-shaped revolving body structure is sequentially provided with a first outer cylindrical section 51, an outer guiding conical section 52, a disassembly cylindrical section 53, a first sealing cylindrical section 54, a first transition cylindrical section 55, a first locking cylindrical section 56, a second sealing cylindrical section 57 and a heat insulator connecting cylindrical section 58 from a fifth end to a sixth end along the axis direction of the outer surface;
the outer surface of the disassembly cylindrical section of the upper joint of the instrument is drilled with an upper joint disassembly hole. A plurality of first sealing grooves 54a extending along the circumferential direction of the outer ring are uniformly distributed on the outer ring of the first sealing cylindrical section 54 along the axial direction of the outer ring, an external thread section which can be matched with the internal thread section of the pressure-bearing outer tube 1 is arranged on the outer ring of the first locking cylindrical section 56, a plurality of second sealing grooves 57a extending along the circumferential direction of the outer ring are uniformly distributed on the outer ring of the second sealing cylindrical section 57 along the axial direction of the outer ring, and a heat insulation sleeve connecting hole 58a is drilled on the outer ring of the heat insulation body connecting cylindrical section 58; in the invention, the outer diameter of the disassembly cylindrical section 53 is recorded as R3, the outer diameter of the first sealing cylindrical section 54 is recorded as R4, the outer diameter of the transition cylindrical section 55 is recorded as R5, the major diameter of the external thread section of the first locking cylindrical section 56 is recorded as R6, the outer diameter of the second sealing cylindrical section 57 is recorded as R7, the outer diameter of the insulator connecting cylindrical section 58 is recorded as R8, R3 > R4 > R6 > R5 > R7 > R8, the outer diameter R4 of the first sealing cylindrical section 54 is matched with the sealing matching section R1 of the pressure-bearing outer pipe 1, and the outer diameter R7 of the second sealing cylindrical section 57 is matched with the inner diameter of the heat-insulating inner pipe 3.
When the upper joint 5 of the instrument is mounted on the pressure-bearing outer tube 1, as shown in fig. 8, a step surface between the disassembly cylindrical section 53 and the first sealing cylindrical section 54 abuts against the first end surface of the pressure-bearing outer tube 1, the first sealing cylindrical section 54 is just embedded into the sealing matching section 11 of the pressure-bearing outer tube 1, and a first sealing ring group is embedded into an annular cavity formed between a first sealing groove 54a of the first sealing cylindrical section 54 and the sealing matching section 11; the first locking cylindrical section 56 is matched with the internal thread section of the pressure-bearing outer tube 1 to realize the connection and fixation of the upper joint 5 of the instrument and the pressure-bearing outer tube 1; the second sealing cylindrical section 57 is just embedded into the inner wall of the third end of the heat-insulating inner pipe 3 after passing through the central round hole of the compression nut 4, and a second sealing ring group is embedded into an annular cavity formed between the second sealing groove of the second sealing cylindrical section 57 and the inner wall of the heat-insulating inner pipe 3; the insulator connecting cylindrical section 58 is externally fitted with a heat insulating jacket 59, and the heat insulating jacket 59 is fixed to the insulator connecting cylindrical section 58 by screws screwed into the heat insulating jacket connecting holes 58 a.
The center of the step-shaped revolving body structure is provided with a sealing fit round hole section 59, a locking round hole section 510, a first transition round hole section 511, a taper hole section 512 and a second transition round hole section 513 in sequence from the fifth end to the sixth end along the axis direction of the center, and the locking round hole section 510 is provided with internal threads.
Sensor connector 6: for packaging the sensor with the sensing portion of the sensor exposed and ensuring that the central bore portion of the fitting on the instrument is sealed. As shown in fig. 7 and 8, the sensor joint 6 is sequentially divided into a hanging ring connecting part 61, a measuring part and an upper joint connecting part 63 along the axis direction of the sensor joint, wherein the hanging ring connecting part 61 is fixedly connected with a hanging ring 7 through threads, the measuring part is provided with a measuring cavity 62a which radially extends along the sensor joint and penetrates through the side wall of the sensor joint, a temperature sensor mounting cavity 63a and a pressure sensor mounting cavity 63b are arranged in the upper joint connecting part 63, one ends of the temperature sensor mounting cavity 63a and the pressure sensor mounting cavity 63b are communicated with the measuring cavity 62a, and the other ends penetrate through the axial end face of the upper joint connecting part 63;
the outer surface of the hanging ring connecting part 61 of the sensor connector 6 is drilled with a sensor connector dismounting hole.
The outer surface of the upper joint connection part 63 is also a step-shaped revolving body, the upper joint connection part 63 is sequentially provided with a second outer cylindrical section 631, a third sealing cylindrical section 632 and a second locking cylindrical section 633 from the side of the upper joint connection part along the axis direction of the upper joint connection part, a plurality of third sealing grooves extending along the circumferential direction of the outer ring are uniformly distributed on the outer ring of the third sealing cylindrical section 632 along the axis direction of the upper joint connection part, and the outer ring of the second locking cylindrical section 633 is provided with an external thread section which can be matched with the inner thread of the upper joint locking round hole section 510 of the instrument.
The outer diameter of the second outer cylindrical section 631 is recorded as R9, the outer diameter of the third sealing cylindrical section 632 is recorded as R10, the large diameter of the external thread section of the second locking cylindrical section 633 is recorded as R11, R9 is more than R10 and more than R11, the step surface between the second outer cylindrical section 631 and the third sealing cylindrical section 632 is propped against the fifth end surface of the upper joint 5 of the instrument, the third sealing cylindrical section 632 is just embedded into the sealing fit circular hole section 59 of the upper joint 5 of the instrument, a third sealing ring group is embedded into the annular cavity formed between the third sealing groove of the third sealing cylindrical section 632 and the sealing fit circular hole section 59, and the locking of the external thread section of the second locking cylindrical section 633 and the locking circular hole section 510 of the upper joint 5 of the instrument is realized by the locking of the upper joint 5 of the instrument and the sensor joint 6.
The measurement assembly 7 is used as a core part of the geothermal well logging system and is used for measuring well temperature, well temperature gradient, pressure and natural gamma, and collected data can be transmitted to a computer through the WIFI module.
As shown in fig. 9 and 10, the measurement assembly mainly includes a NaI crystal 71, a photomultiplier tube 72, a main circuit board 73, a power board 74, a WIFI module 75, a lithium battery 76, and a temperature sensor 77 and a pressure sensor 78 installed in the sensor connector 6; the NaI crystal 71, the photomultiplier 72, the power panel 74, the main circuit board 73, the WIFI module 75, and the lithium battery 76 are sequentially arranged on the axis of the heat insulation inner tube 3 from the fourth end to the third end, and a micro processing unit (MCU), a discriminator, an amplifier, and a digital-analog conversion module are mounted on the main circuit board 73.
The photomultiplier 72 has a photocathode, an anode and a multiplier stage, the photocathode is closely arranged on one side of the NaI crystal 71, the multiplier stage is powered by a lithium battery 76 through a power panel 74, and the anode sequentially outputs pulse current signals to the micro-processing unit through an amplifier and a discriminator; the WIFI module 75 is connected to the micro-processing unit through a wiring and the main circuit board 73, and the WIFI module 75 comprises an antenna base, an antenna transmitting board, a power switch and a charging socket;
the temperature sensor 77 is hermetically arranged in the temperature sensor mounting cavity 63a of the sensor connector 6, the head of the temperature sensor 77 extends into the measuring cavity, and the tail of the temperature sensor is connected with the digital-to-analog conversion module on the main circuit board through a wiring;
the pressure sensor 78 is mounted in the pressure sensor mounting cavity 63b of the sensor connector in a sealing manner, the head of the pressure sensor 78 extends into the measuring cavity, and the tail of the pressure sensor is connected with the digital-to-analog conversion module on the main circuit board through a wiring, see fig. 8.
The measurement assembly 7 further includes a heat insulator 713, a first inner heat absorber 79, a second inner heat absorber 710, an upper heat absorber 711, and a lower heat absorber 712, the heat insulator 713 is embedded in the heat insulating jacket 59, the upper heat absorber 711 is provided between the heat insulator 713 and the lithium battery 76, the first inner heat absorber 79 is provided between the WIFI module 75 and the main circuit board 73, the second inner heat absorber 710 is provided between the main circuit board 73 and the power supply board 74, and the lower heat absorber 712 is provided between the NaI crystal 71 and the fourth end of the heat insulating inner tube 3.
In the invention, the NaI crystal 71 and the photomultiplier 72 for realizing gamma ray logging adopt an anti-impact buffer structure, as shown in fig. 11, the NaI crystal 71 and the photomultiplier 72 are sequentially arranged in an inner sleeve 714, one end of the inner sleeve 714 is fixedly connected with a lower heat absorber 712 through a centralizing joint 715, and the other end of the inner sleeve 714 is connected with a power supply board 74 through another joint; the photomultiplier tube 72 has a photomultiplier tube holder disposed at one end thereof remote from the NaI crystal 71, and a spring positioning sleeve 715 disposed on the photomultiplier tube holder, and a shock-resistant spring 716 is disposed on the spring positioning sleeve 715, and the other end of the shock-resistant spring 716 abuts against the end of the inner sleeve 714.
As a more specific implementation of this example: an anti-vibration sponge 717 and a rubber pad 718 are provided between the centralizing joint 719 and the inner sleeve 714.
Working principle:
the natural temperature gradient of the underground is caused by the diffusion of heat sources in the earth, and if the geologic body is uniform or concentric spherical and uniformly distributed, the geothermal gradient is a very stable quantity, and the well temperature change along with the depth is a constant, which is called a normal geothermal gradient. The average value of the ground temperature gradient in most areas of China is 0.03 ℃/m. When the geological structure and other factors change or the geological body is not uniform, the spherical heat balance condition is destroyed, and the axial temperature gradient in the drill hole and the radial temperature distribution of the drill hole can change locally.
Downhole pressure is caused by the density and vertical depth of the downhole fluid. The density of the fluid downhole depends on the composition of the solid, liquid, and gas that make up the fluid. If the downhole fluid consists of a single homogeneous liquid, the pressure is only a function of vertical depth.
The well temperature and pressure logging is to observe the temperature and pressure gradient changes to judge the possible abnormal conditions around the borehole, so as to obtain the information with practical value. Flow and density variations in subsurface fluids (including groundwater, oil, gas, etc.) create well temperature and pressure anomalies. The volume of formation fluid expands as it flows into the borehole, solid phase in the well fluid precipitates and separates, and soluble minerals dissolve and diffuse, etc., causing temperature and pressure changes along the borehole axis. The temperature and pressure changes are also caused by heat released by cement bond outside the casing during construction of abnormally radioactive strata, oxidized strata and well.
The digital geothermal logging system can be used for measuring the radiation intensity of the underground natural gamma rays, dividing the rock stratum, judging lithology, comparing the stratum, explaining the target layer thickness and determining the stratum structure.
Gamma ray detection theory of operation: the NaI crystal and the photomultiplier tube form a natural gamma detector, each multiplier electrode of the photomultiplier tube is added with an increasing positive voltage, the NaI crystal emits photons under the excitation of gamma rays, the photons strike on the photocathode of the photomultiplier tube to enable the photons to emit photoelectrons, the photoelectrons are continuously accelerated to proliferate under the action of each multiplier electrode of the photomultiplier tube, and finally pulse current with enough amplitude is formed at the anode of the photomultiplier tube. The pulse current is amplified by a pre-amplifier, selected by a discriminator and output to a micro processing unit (MCU) for counting.
Well temperature working principle: the measurement of the well temperature adopts PT1000 platinum resistor with small time constant as a sensor, can quickly respond to the change of the temperature in the drilling hole, and the temperature signal is subjected to analog-digital conversion and then is subjected to measurement processing by a singlechip.
Pressure working principle: the pressure sensor adopts a high-temperature pressure sensor, a PT1000 platinum resistor is built in the high-temperature pressure sensor as a built-in temperature sensor, and the micro-processing unit carries out correction calculation through an output signal of the pressure sensor, an output signal of the built-in temperature sensor and a secondary calibration equation, so that an actual pressure value is finally obtained.
The main technical indexes of the high-temperature high-pressure geothermal logging system of the embodiment of the invention are as follows:
1) Gamma ray detection sensor: phi 30 multiplied by 80NaI crystal+GDB23 photomultiplier
2) Gamma-ray detection count range: 0-65000CPS
3) Gamma-ray detection energy threshold: not less than 0.06MeV
4) Measurement accuracy: 5% F.S
5) Well Wen Fenbian rate: 0.025 DEG C
6) Logging speed: less than or equal to 600m/H
7) Lifting and lowering speed: less than or equal to 1000m/H
8) Temperature gradient measurement range: 0.02 ℃/m-2 ℃/m (speed measurement-600 m/H)
9) Well temperature measuring sensor: pt-1000
10 Pressure bearing of the instrument: less than or equal to 55 MPa
11 Temperature resistance of the instrument: -10 ℃ -250 ℃; continuously working for 6 hours and intermittently working for 6 hours
12 Well temperature measurement range): 0-250 DEG C
13 A built-in power supply of the instrument): lithium battery 7.4V 800AH
14 Signal output: and (5) WiFi.
The using method comprises the following steps:
the high-temperature high-pressure digital geothermal logging system needs to be combined with logging software of LoggingWifi to log.
1) Starting logging software on PC
Firstly, opening logging software 'LoggingWifi' of a desktop, and waiting for software start-up to finish.
2) Powering on the instrument
And unscrewing an upper instrument joint and a pressure-bearing outer tube of the high-temperature high-pressure geothermal logging system. When the pressure-bearing outer tube is unscrewed, the instrument is required to be horizontally placed on a clean flat ground or a table, and V-shaped groove cushion blocks are required to be padded at two ends of the instrument. Because the measuring tube is longer, when the instrument heat preservation inner tube is pulled out, the instrument heat preservation inner tube is required to be held by hands. The middle part of the instrument heat preservation inner tube is provided with a power switch, a WiFi antenna and a charging port. The instrument power switch, the charging port and the WiFi antenna are required to be completely exposed (see below) so as to be connected and communicated with the PC, and then the instrument power is turned on.
Attention is paid here to: the photomultiplier is arranged at the bottom of the inner tube of the instrument, so that the whole instrument is generally not required to be drawn out, and the photomultiplier is prevented from being damaged by impact. The position of the heat preservation sleeve of the instrument and the position of the WiFi antenna are weak, and attention is paid to preventing accidental damage.
3) Depth measurement sky pulley power-on
Depth measurement sky pulleys are well known as equipment for logging depth and descending a well of a high-temperature high-pressure digital geothermal logging system, and when the depth measurement sky pulley is used, the depth measurement sky pulley is hung on a large hook of a drilling machine, and a coring winch steel wire bypasses the pulley to descend a logging instrument. The depth information of the depth pulley is transmitted to the PC in a wireless mode in real time, the depth information is fully charged before use, a steel wire is installed in the downhole direction of the depth measurement antenna pulley mark, a power supply is started, the depth measurement antenna pulley is lifted to a proper height, and the depth measurement pulley is simply fixed when necessary, so that shaking is prevented.
4) Establishing a connection
Normally, after the above steps are completed, a prompt that the instrument is connected will appear on the software interface of the PC.
First, check the number of connected instruments, the logging should have 2 connected instruments (one logging instrument and one depth measuring pulley), if after 1 minute the instruments are started, still display less than 2 connected instruments, check if the high temperature and high pressure geothermal logging instrument of the present invention has been powered.
And secondly, clicking the computer desktop software [ instrument operation ], wherein an instrument operation dialog box appears, and specific information of two connected devices is displayed, wherein the specific information is respectively displayed in a geothermal logging system list and a depth instrument list.
And thirdly, clicking [ determining ] to perform the next operation on the instrument.
5) Parameter setting
In the first step, instrument parameters are set as follows.
a) Start measurement time: the instrument starts to collect data after this time, units: and (3) minutes. The measurement starting time is set, so that the measurement starting time from the wellhead or the measurement starting time from the bottom of the well can be flexibly selected, and a large amount of useless data cannot be generated. In addition, the instrument is operated in a power-saving state before the measurement time is started, so that the power consumption can be saved, the working time of one-time well descending is prolonged, and the internal temperature rise of the instrument is reduced.
b) Ending the measurement time: the instrument stops sampling data after this time, units: and (3) minutes. The proper measurement ending time and measurement starting time are set, so that self-heating of the instrument can be reduced, the instrument is protected, and the electric quantity of a battery is saved.
In this step, care should be taken to: whether the measurement is carried out from the wellhead downwards or from the bottom of the well upwards, enough initial measurement time is reserved, and the tool is guaranteed to arrive at the well section to be measured before the time arrives. There is room for ending the measurement time, or else, the measurement is stopped when the target wellbore instrument has not been measured.
c) The measurement mode is as follows: only continuous measurements are currently selected.
d) Sampling interval time: setting a sampling interval, sampling a little by default for 1000ms, and selecting the sampling interval time correctly according to different requirements on site, wherein the minimum is 500ms and the maximum is 60000 ms. The smaller the time interval, the larger the total data volume, and the more measurement points per unit depth (again related to logging speed).
e) Cable outside diameter: the outer diameter of the logging site downhole wireline. With correct input, input errors can produce depth errors.
f) Depth direction: the default value is forward and is set when shipped. The depth count direction can be changed when other depth measuring pulleys are replaced, and the depth is not increased when the instrument is lowered, or the depth is not decreased when the instrument is lifted, or the opposite value is modified.
Firstly, setting parameters of a downhole instrument, clicking a [ start ] button after setting, and starting the probe to enter a working state. And then setting parameters of the depth pulley, clicking a [ start ] button after the setting is completed, and enabling the depth pulley to enter a measurement state.
The high-temperature high-pressure digital geothermal logging instrument is reassembled, namely the heat-preserving inner pipe and the pressure-bearing outer pipe are locked again, connecting threads are required to be cleaned before, whether the pressure-bearing sealing ring is damaged or not is checked, and a little high-temperature silicone grease is uniformly smeared on the pressure-bearing sealing ring.
6) Downhole measurement
The winch is started to lift the well logging instrument, and the high-temperature high-pressure digital geothermal well logging instrument slowly goes into the well. When the joint of the instrument and the steel wire rope is aligned with the wellhead, the winch is stopped, and operations such as deep zero clearing are performed. If the depth is to be set, the right click of the mouse clicks on "depth", the current depth may be set to any value. The true depth of the tool should be set correctly according to the actual situation of the site.
When the clock counts down to 0S after the measurement is started, the downhole tool starts to collect and record measurement data.
By the end of the measurement time, the tool is stopped and the measurement is recorded. In some cases, you want to end the measurement without ending the measurement time, you can end at any time. Clicking on the software interface [ stop measurement ] ends. This is a determination that the downhole tool may not be connected during operation, which may prompt "WiFi connection failure, please restart probe when power is off-! And clicking a determination button, and restarting the downhole instrument to automatically connect the downhole instrument after the downhole instrument is powered off when the next time of connecting the high-temperature high-pressure digital geothermal logging system for communication.
7) Data playback
Starting logging software, restarting the downhole instrument after being powered off for 30 seconds, clicking [ probe playback ], popping up a playback dialog box by the software, selecting the instrument name to be played back, and clicking for determination.
And when the popup 'playback is successful and the data file is stored', the prompt indicates that the data playback is successful and the click is determined. The Data is automatically stored in the Data folder under the software installation directory. The data file can be opened by using the LoggingPro of the PC or opened and checked by using the notepad software of the Win system.
If the data playback fails, the steps are repeated, the distance between the probe and the PC is as close as possible during the data playback, and the electric quantity of the underground instrument is kept to be sufficient.
8) Data diagram
Clicking [ LoggingPro ] in software to enter the graphical interface. Clicking a menu bar [ file ], selecting [ opening file ], entering an installation directory to select a Data folder, correctly selecting a Data file and opening. Click [ graph ] set the appropriate scale. And storing the modified data according to the 'carriage return'.
According to the logging system adopting the structure, as the measuring devices in the heat-preserving inner pipe are sealed in the two shells, double protection is realized, heat insulation and pressure isolation of the inner part and the outer part of the heat-preserving inner pipe are smoothly realized, the logging system can normally work under high temperature and high pressure environment, the reliable working temperature range reaches-10 ℃ to +250 ℃, the bearing pressure reaches 55 MPa, and logging under high temperature and high pressure working conditions is smoothly realized.
Claims (6)
1. A high temperature high pressure digital geothermal logging system, characterized by: comprising
The inner wall of the first end of the pressure-bearing outer tube is sequentially provided with a seal fit section and an internal thread section from the first end to the second end, the inner diameter of the seal fit section of the pressure-bearing outer tube is recorded as R1, the major diameter of the internal thread section of the pressure-bearing outer tube is recorded as R2, R1 is more than R2, and the second end of the pressure-bearing outer tube is provided with a tail internal step hole;
the instrument lower joint is used for sealing the second end of the pressure-bearing outer tube and is provided with an annular boss which can be just embedded into the tail inner step hole, and the annular boss is welded and fixed with the pressure-bearing outer tube after being embedded into the tail inner step hole of the pressure-bearing outer tube to realize sealing of the second end of the pressure-bearing outer tube;
the heat-insulating inner tube is arranged in the pressure-bearing outer tube in a coaxial manner, is of a tube body structure with a circular cross section, and is limited to be a third end at one end along the extending direction of the axis of the tube body and a fourth end with a closed end at the other end; the third end of the heat-insulating inner tube is close to the first end of the pressure-bearing outer tube and is positioned at the internal thread section of the pressure-bearing outer tube, the fourth end of the heat-insulating inner tube is close to the second end of the pressure-bearing outer tube, and the end face of the fourth end abuts against the end face of the annular boss of the lower joint of the instrument to limit the fourth end of the heat-insulating inner tube;
The compression nut is provided with an external thread section which can be matched with the internal thread section of the pressure-bearing outer pipe, the center of the compression nut is provided with a round hole with the diameter larger than the inner diameter of the heat-insulating inner pipe, and the end face of the compression nut is provided with a through connecting hole; the compression nut is in threaded connection with the pressure-bearing outer tube through the inner thread section and the outer thread section and props against the end face of the third end of the heat-insulating inner tube to realize the limit of the third end of the heat-insulating inner tube;
the instrument upper joint is of a stepped revolving body structure coaxially arranged with the pressure-bearing outer tube, one end of the instrument upper joint in the extending direction along the axis of the instrument upper joint is defined as a fifth end, and the other end of the instrument upper joint is defined as a sixth end;
the outer surface of the step-shaped revolving body structure is sequentially provided with a first outer cylindrical section, an outer guiding conical section, a disassembly cylindrical section, a first sealing cylindrical section, a first transition cylindrical section, a first locking cylindrical section, a second sealing cylindrical section and a heat insulator connecting cylindrical section from a fifth end to a sixth end along the axis direction of the outer surface;
a plurality of first sealing grooves extending along the circumferential direction of the outer ring are uniformly distributed on the outer ring of the first sealing cylindrical section along the axial direction of the outer ring, an external thread section which can be matched with the internal thread section of the pressure-bearing outer pipe is arranged on the outer ring of the first locking cylindrical section, a plurality of second sealing grooves extending along the circumferential direction of the outer ring are uniformly distributed on the outer ring of the second sealing cylindrical section along the axial direction of the outer ring, and a heat insulation sleeve connecting hole is drilled on the outer ring of the heat insulation body connecting cylindrical section;
The outer diameter of the disassembly cylindrical section is recorded as R3, the outer diameter of the first sealing cylindrical section is recorded as R4, the outer diameter of the transition cylindrical section is recorded as R5, the large diameter of the external thread section of the first locking cylindrical section is recorded as R6, the outer diameter of the second sealing cylindrical section is recorded as R7, the outer diameter of the insulator connecting cylindrical section is recorded as R8, R3 is more than R4 is more than R6 is more than R5 is more than R7 and more than R8, the outer diameter R4 of the first sealing cylindrical section is matched with the sealing matching section R1 of the pressure-bearing outer pipe, and the outer diameter R7 of the second sealing cylindrical section is matched with the inner diameter of the heat preservation inner pipe;
the step surface between the disassembly cylindrical section and the first sealing cylindrical section is propped against the first end surface of the pressure-bearing outer pipe, the first sealing cylindrical section is just embedded into the sealing matching section of the pressure-bearing outer pipe, and a first sealing ring group is embedded into an annular cavity formed between the first sealing groove of the first sealing cylindrical section and the sealing matching section; the first locking cylindrical section is matched with the internal thread section of the pressure-bearing outer pipe for locking to realize the connection and fixation of the upper joint of the instrument and the pressure-bearing outer pipe; the second sealing cylindrical section is just embedded into the inner wall of the third end of the heat-insulating inner pipe after passing through the central round hole of the compression nut, and a second sealing ring group is embedded into an annular cavity formed between the second sealing groove of the second sealing cylindrical section and the inner wall of the heat-insulating inner pipe; the insulation sleeve is sleeved outside the insulation body connecting cylindrical section and is fixed on the insulation body connecting cylindrical section through a screw in threaded connection with the insulation sleeve connecting hole;
The center of the stepped rotary body structure is provided with a sealing fit round hole section, a locking round hole section, a first transition round hole section, a taper hole section and a second transition round hole section in sequence from a fifth end to a sixth end along the axis direction of the stepped rotary body structure, and the locking round hole section is provided with internal threads;
the sensor connector is sequentially divided into a lifting ring connecting part, a measuring part and an upper connector connecting part along the axis direction of the sensor connector, the lifting ring connecting part is fixedly connected with a lifting ring through threads, the measuring part is provided with a measuring cavity which radially extends along the sensor connector and penetrates through the side wall of the sensor connector, a temperature sensor mounting cavity and a pressure sensor mounting cavity are arranged in the upper connector connecting part, one end of the temperature sensor mounting cavity and one end of the pressure sensor mounting cavity are communicated with the measuring cavity, and the other end of the temperature sensor mounting cavity penetrates through the shaft end face of the upper connector connecting part;
the outer surface of the upper joint connecting part is also a step-shaped revolving body, the upper joint connecting part is sequentially provided with a second outer cylindrical section, a third sealing cylindrical section and a second locking cylindrical section from the side of the hanging ring connecting part to the side of the upper joint connecting part along the axis direction of the upper joint connecting part,
a plurality of third sealing grooves extending along the circumferential direction of the outer ring are uniformly distributed on the outer ring of the third sealing cylindrical section along the axial direction of the outer ring, an external thread section which can be matched with the internal thread of the locking round hole section of the joint on the instrument is arranged on the outer ring of the second locking cylindrical section,
The outer diameter of the second outer cylindrical section is marked as R9, the outer diameter of the third sealing cylindrical section is marked as R10, the large diameter of the outer thread section of the second locking cylindrical section is marked as R11, R9 is more than R10 is more than R11,
the step surface between the second outer cylindrical section and the third sealing cylindrical section is propped against the fifth end surface of the upper joint of the instrument, the third sealing cylindrical section is just embedded into the sealing fit round hole section of the upper joint of the instrument, a third sealing ring group is embedded into an annular cavity formed between a third sealing groove of the third sealing cylindrical section and the sealing fit round hole section, and the locking of the upper joint of the instrument and the sensor joint is realized by the threaded fit locking of the outer threaded section of the second locking cylindrical section and the locking round hole section of the upper joint of the instrument;
the measuring assembly mainly comprises a NaI crystal, a photomultiplier, a main circuit board, a power board, a WIFI module, a lithium battery, a temperature sensor and a pressure sensor, wherein the NaI crystal, the photomultiplier, the main circuit board, the power board, the WIFI module, the lithium battery are arranged in a protection Wen Naguan;
the NaI crystal, the photomultiplier, the power panel, the main circuit board, the WIFI module and the lithium battery are sequentially arranged on the axis of the heat-preserving inner tube from the fourth end to the third end, and the main circuit board is provided with a micro-processing unit, a discriminator, an amplifier and a digital-to-analog conversion module;
The photomultiplier is provided with a photocathode, an anode and a multiplier stage, the photocathode is closely arranged on one side of the NaI crystal, the multiplier stage is powered by a lithium battery through a power panel, and the anode sequentially outputs a pulse current signal to the micro-processing unit through an amplifier and a discriminator;
the WIFI module is connected to the micro-processing unit through a wiring and a main circuit board and comprises an antenna base, an antenna transmitting board, a power switch and a charging socket;
the temperature sensor is hermetically arranged in a temperature sensor mounting cavity of the sensor connector, the head of the temperature sensor extends into the measuring cavity, and the tail of the temperature sensor is connected with a digital-to-analog conversion module on the main circuit board through a wiring;
the pressure sensor is arranged in a pressure sensor mounting cavity of the sensor connector in a sealing mode, the head of the pressure sensor extends into the measuring cavity, and the tail of the pressure sensor is connected with a digital-to-analog conversion module on the main circuit board through a wiring.
2. The high temperature, high pressure digital geothermal logging system of claim 1, wherein:
the measuring assembly further comprises a first inner heat absorber, a second inner heat absorber, an upper heat absorber and a lower heat absorber, wherein the upper heat absorber is arranged between the heat insulator and the lithium battery, the first inner heat absorber is arranged between the WIFI module and the main circuit board, the second inner heat absorber is arranged between the main circuit board and the power supply board, and the lower heat absorber is arranged between the NaI crystal and the fourth end of the heat-preserving inner tube.
3. The high temperature, high pressure digital geothermal logging system of claim 2, wherein: the NaI crystal and the photomultiplier are sequentially arranged in an inner sleeve, one end of the inner sleeve is fixedly connected with the lower heat absorber through a centralizing joint, and the other end of the inner sleeve is connected with a power panel through another joint; one end of the photomultiplier, which is far away from the NaI crystal, is provided with a photomultiplier tube seat, a spring positioning sleeve is arranged on the photomultiplier tube seat, an anti-vibration spring is sleeved on the spring positioning sleeve, and the other end of the anti-vibration spring is propped against the end part of the inner sleeve.
4. A high temperature, high pressure digital geothermal logging system according to claim 3, wherein: an anti-seismic sponge and a rubber pad are arranged between the centralizing joint and the inner sleeve.
5. The high temperature, high pressure digital geothermal logging system of claim 1, wherein: and a sensor joint dismounting hole is drilled on the outer surface of the lifting ring connecting part of the sensor joint.
6. The high temperature, high pressure digital geothermal logging system of claim 1, wherein: and an upper joint dismounting hole is drilled on the outer surface of the dismounting cylindrical section of the upper joint of the instrument.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710265056.3A CN107083955B (en) | 2017-04-21 | 2017-04-21 | High-temperature high-pressure digital geothermal logging system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710265056.3A CN107083955B (en) | 2017-04-21 | 2017-04-21 | High-temperature high-pressure digital geothermal logging system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107083955A CN107083955A (en) | 2017-08-22 |
| CN107083955B true CN107083955B (en) | 2023-07-07 |
Family
ID=59612849
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710265056.3A Active CN107083955B (en) | 2017-04-21 | 2017-04-21 | High-temperature high-pressure digital geothermal logging system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107083955B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111663938B (en) * | 2019-03-05 | 2023-07-04 | 中国石油化工股份有限公司 | High-temperature drilling temperature measurement method |
| CN110242282B (en) * | 2019-07-19 | 2024-04-19 | 西安威盛电子科技股份有限公司 | Underground video instrument |
| CN113532938B (en) * | 2020-09-24 | 2022-12-02 | 中国地质科学院岩溶地质研究所 | Deep hole in-situ sampling equipment |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2053358C1 (en) * | 1992-06-29 | 1996-01-27 | Соколов Николай Николаевич | Well bore position measuring apparatus of measuring complex |
| CN101338664A (en) * | 2008-05-23 | 2009-01-07 | 安东石油技术（集团）有限公司 | Condensed gas flow quantity measuring systems |
| CN101749007A (en) * | 2009-12-11 | 2010-06-23 | 中国石油集团长城钻探工程有限公司 | High-temperature cable direct-reading five-parameter logging instrument |
| CN102505939A (en) * | 2011-10-21 | 2012-06-20 | 中国科学院武汉岩土力学研究所 | Stratified fluid monitoring and sampling device based on pressure pulse |
| CN102996117A (en) * | 2012-12-20 | 2013-03-27 | 西安思坦仪器股份有限公司 | Heat-resistant gas injection multi-parameter logger |
| CN205743872U (en) * | 2016-05-09 | 2016-11-30 | 盘锦辽油晨宇集团有限公司 | Super critical boiler steam injection well high temperature multiparameter oil-well test gauge |
| CN106368680A (en) * | 2016-09-20 | 2017-02-01 | 贝兹维仪器(苏州)有限公司 | Wireless device for testing while drilling |
| CN206860168U (en) * | 2017-04-21 | 2018-01-09 | 中国地质科学院水文地质环境地质研究所 | A kind of HTHP numeral underground heat logging system |
-
2017
- 2017-04-21 CN CN201710265056.3A patent/CN107083955B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2053358C1 (en) * | 1992-06-29 | 1996-01-27 | Соколов Николай Николаевич | Well bore position measuring apparatus of measuring complex |
| CN101338664A (en) * | 2008-05-23 | 2009-01-07 | 安东石油技术（集团）有限公司 | Condensed gas flow quantity measuring systems |
| CN101749007A (en) * | 2009-12-11 | 2010-06-23 | 中国石油集团长城钻探工程有限公司 | High-temperature cable direct-reading five-parameter logging instrument |
| CN102505939A (en) * | 2011-10-21 | 2012-06-20 | 中国科学院武汉岩土力学研究所 | Stratified fluid monitoring and sampling device based on pressure pulse |
| CN102996117A (en) * | 2012-12-20 | 2013-03-27 | 西安思坦仪器股份有限公司 | Heat-resistant gas injection multi-parameter logger |
| CN205743872U (en) * | 2016-05-09 | 2016-11-30 | 盘锦辽油晨宇集团有限公司 | Super critical boiler steam injection well high temperature multiparameter oil-well test gauge |
| CN106368680A (en) * | 2016-09-20 | 2017-02-01 | 贝兹维仪器(苏州)有限公司 | Wireless device for testing while drilling |
| CN206860168U (en) * | 2017-04-21 | 2018-01-09 | 中国地质科学院水文地质环境地质研究所 | A kind of HTHP numeral underground heat logging system |
Non-Patent Citations (1)
| Title |
|---|
| 多孔介质汽-水相对渗透率研究进展;刘彦广;《科技导报》;74-77 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107083955A (en) | 2017-08-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11326449B2 (en) | Method for determining three-dimensional in-situ stress based on displacement measurement of borehole wall | |
| US6839000B2 (en) | Integrated, single collar measurement while drilling tool | |
| US9328561B2 (en) | Drill bits with sensors for formation evaluation | |
| CN107083955B (en) | High-temperature high-pressure digital geothermal logging system | |
| CN204253027U (en) | The nearly drill bit gamma ray logger of π | |
| CN103527181B (en) | A kind of with boring controllable source neutron well logging method and instrument | |
| CN104088625B (en) | Coal mine down-hole drilling wireless drilling track and hole depth measurement device and method | |
| MX2010011148A (en) | Method for estimating formation permeability using time lapse measurements. | |
| BRPI0710647B1 (en) | Apparatus and method for measuring parameters of an earthquake and computer-readable medium? | |
| US8975574B2 (en) | Well-logging tool with azimuthal and spectral radiation detectors and related methods | |
| CN205605197U (en) | Nearly many parameter measurement of drill bit device in pit | |
| CN111677496A (en) | Electromagnetic wave logging-while-drilling instrument for underground coal mine | |
| CN202946149U (en) | Logging while drilling natural gamma logging instrument | |
| CN109322660A (en) | A kind of main stress direction measurement-while-drilling system signal exciting bank of level | |
| US20140346337A1 (en) | Well-Logging Tool With First And Second Azimuthal Radiation Detectors And Related Methods | |
| CN206860168U (en) | A kind of HTHP numeral underground heat logging system | |
| CN204126629U (en) | π Imaging Logging System | |
| CN202339418U (en) | Logging device | |
| CN206035475U (en) | C/Hratio pulsed neutron multi -parameter logging instrument | |
| US20160154141A1 (en) | Neutron tool with dual-purpose detector | |
| CN109184675A (en) | A kind of main stress direction measurement-while-drilling system signal acquisition of level and storage device | |
| CN207488508U (en) | Ground built-in screw type untethered node wideband monitoring device entirely | |
| CN213450362U (en) | HDS attitude measurement unit | |
| CN209117883U (en) | A kind of drilling well encoder | |
| CN109594975B (en) | Underground data acquisition and carrying method and device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |