CN221074235U - Logging device - Google Patents
Logging device Download PDFInfo
- Publication number
- CN221074235U CN221074235U CN202323308453.4U CN202323308453U CN221074235U CN 221074235 U CN221074235 U CN 221074235U CN 202323308453 U CN202323308453 U CN 202323308453U CN 221074235 U CN221074235 U CN 221074235U
- Authority
- CN
- China
- Prior art keywords
- insulating
- drill bit
- detection
- logging
- drill
- 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
- 238000001514 detection method Methods 0.000 claims abstract description 42
- 238000009413 insulation Methods 0.000 claims description 28
- 238000004891 communication Methods 0.000 claims description 11
- 239000000523 sample Substances 0.000 claims description 9
- 238000003780 insertion Methods 0.000 claims description 8
- 230000037431 insertion Effects 0.000 claims description 8
- 230000000149 penetrating effect Effects 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 239000011159 matrix material Substances 0.000 abstract description 2
- 238000005553 drilling Methods 0.000 description 11
- 238000000034 method Methods 0.000 description 6
- 239000011435 rock Substances 0.000 description 5
- 239000012212 insulator Substances 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000012857 radioactive material Substances 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Landscapes
- Geophysics And Detection Of Objects (AREA)
Abstract
The application relates to a logging device, which comprises a drill rod, a matrix and a drill bit; the drill bit and the drill rod are both provided with electrodes to detect the resistivity of the underground environment; the base body is sequentially provided with a first insulating part, a detection part and a second insulating part, opposite ends of the detection part are respectively connected with one ends of the first insulating part and the second insulating part, one axial end of the drill rod is connected with one end of the first insulating part, which is away from the detection part, and one axial end of the drill bit is connected with one end of the second insulating part, which is away from the detection part; the detection part is provided with a temperature sensor which is suitable for detecting the temperature of the external environment. Compared with the existing logging instrument, the application can reduce the consumption of consumables and reduce the manufacturing cost.
Description
Technical Field
The application relates to the technical field of logging tools, in particular to a logging device.
Background
During the exploration and development of oil and gas fields, well logging is necessary after drilling so as to know the oil and gas conditions of the stratum. Logging is divided into two modes, cabled logging and logging while drilling. Cabled logging is the measurement of logging results obtained by placing logging instruments into the well with a cable after the well is completed. In some situations, such as highly deviated wells with a slope exceeding 65 ° or even horizontal wells, it is difficult to lower the logging instrument with a wireline; in addition, if the well wall is not good, collapse and blockage are easy to occur, logging data is difficult to obtain by cable logging. In this case, logging while drilling is required to be performed by placing a logging tool between the drill pipe and the drill bit, and detecting various data of the formation while drilling.
In the existing logging while drilling device, for example, in patent document CN106089192B, a plurality of electrodes of an electrode system are all coaxially sleeved on an insulating mandrel in a ring shape and are arranged at intervals, so that the insulating mandrel is long; in order to ensure that the electrodes are fully contacted with the external environment, the diameter length of the insulating core rod is at least consistent with that of the drill rod, so that the insulating core rod is thick, and the consumable amount of the logging instrument is large and the manufacturing cost is high.
Therefore, how to reduce the consumption of logging instruments and reduce the manufacturing cost is a problem to be solved by those skilled in the art.
Disclosure of utility model
In order to reduce the consumption of logging instruments and reduce the manufacturing cost, the application provides a logging device.
In order to achieve the object of the present utility model, there is provided a logging device comprising:
Drill pipe, base member and drill bit;
The drill bit and the drill rod are both provided with electrodes to detect the resistivity of the downhole environment;
The base body is sequentially provided with a first insulating part, a detection part and a second insulating part, the opposite ends of the detection part are respectively connected with one ends of the first insulating part and the second insulating part, one end of the drill rod is connected with one end of the first insulating part, which is away from the detection part, and one end of the drill bit is connected with one end of the second insulating part, which is away from the detection part;
The detection part is provided with a temperature sensor, and the temperature sensor is suitable for detecting the temperature of the external environment.
Compared with the existing logging instrument, the application does not need to additionally arrange the insulating core rod between the drill rods of the drill bit, can reduce the consumption of consumables of the logging instrument and reduce the manufacturing cost.
Drawings
FIG. 1 shows a schematic diagram of a logging device according to an embodiment of the application;
FIG. 2 shows a schematic diagram of a logging device according to an embodiment of the application;
FIG. 3 shows an enlarged view of a portion of a logging device of an embodiment of the present application;
FIG. 4 shows an enlarged view of a portion of a logging device of an embodiment of the present application;
fig. 5 is a schematic view showing a structure of a disassembled state of a base body according to an embodiment of the present application.
Drill rod 100, first insulating part 200, first connecting part 210, first connecting groove 211, first pin 220, detecting part 300, first insertion hole 310, second pin 320, second insulating part 400, second connecting part 410, second connecting groove 411, second insertion hole 420, drill bit 500, electrode 600, and insulating holder 700.
Detailed Description
Various exemplary embodiments, features and aspects of the application will be described in detail below with reference to the drawings. In the drawings, like reference numbers indicate identical or functionally similar elements. Although various aspects of the embodiments are illustrated in the accompanying drawings, the drawings are not necessarily drawn to scale unless specifically indicated.
It should be understood, however, that the terms "length," "width," "height," "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate describing the present utility model or simplify the description, and do not indicate or imply that the devices or elements being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present utility model.
In addition, numerous specific details are set forth in the following description in order to provide a better illustration of the application. It will be understood by those skilled in the art that the present application may be practiced without some of these specific details. In some instances, well known methods, procedures, components, and circuits have not been described in detail so as not to obscure the present application.
FIG. 1 shows a schematic diagram of a logging device according to an embodiment of the application; FIG. 2 shows a schematic structural view of a logging device according to another embodiment of the present application; FIG. 3 illustrates a partial enlarged view of a logging device according to an embodiment of the application; FIG. 4 illustrates a partial enlarged view of a logging device according to an embodiment of the application; fig. 5 shows a schematic structure of a disassembled state of a base body according to an embodiment of the present application.
As shown in fig. 1 and 2, the logging apparatus includes a drill pipe 100, a base body, and a drill bit 500; the drill bit 500 and the drill rod 100 are each provided with an electrode 600 to detect the resistivity of the downhole environment; the base body is sequentially provided with a first insulating part 200, a detection part 300 and a second insulating part 400, opposite ends of the detection part 300 are respectively connected with one ends of the first insulating part 200 and the second insulating part 400, one end of the drill rod 100 is connected with one end of the first insulating part 200, which is away from the detection part 300, and one end of the drill bit 500 is connected with one end of the second insulating part 400, which is away from the detection part 300; the detecting part 300 is provided with a temperature sensor adapted to detect the temperature of the external environment.
In the conventional logging while drilling device, a detection sensor part and an insulating core rod are arranged between a drill bit and a drill rod. Setting an insulating core rod to fix an electrode system to detect the resistivity of the rock in the well; the detection sensor section is configured to detect other geophysical properties downhole. The electrode rings of the electrode system are coaxially sleeved on the insulating core rod and are arranged at intervals, so that the insulating core rod is long; in order to ensure that the electrode ring is fully contacted with the external environment, the diameter length of the insulating core rod is at least consistent with that of the drill rod, so that the insulating core rod is thick, and the consumable amount of the logging instrument is large and the manufacturing cost is high.
According to the application, the electrodes are directly arranged on the radial side walls of the drill bit 500 and the drill rod 100, the electrodes can be directly contacted with the rock to be measured underground, an insulating core rod is not required to be additionally arranged between the drill bit 500 and the drill rod 100 for sleeving the electrode ring, the consumable of the part can be reduced, and only the detection part 300 is required to be arranged between the drill bit 500 and the drill rod 100 for installing various sensors, so that the detection of other geophysical characteristics except resistivity is realized.
In summary, compared with the existing logging instrument, the application does not need to additionally arrange the insulating core rod between the drill bit 500 and the drill rod 100, thereby reducing the consumption of the logging instrument and the manufacturing cost.
And during logging while drilling, the drill bit 500 and the drill pipe 100 are part of not only the logging instrument but also the drilling equipment. Some drill bits 500 require adjustment of the steering during the ripping process, and information transmission techniques for adjustment of steering sometimes require the cooperation of the drill bit 500 with the drill rod 100. The vibration of drill pipe 100 is used to transmit signals, in particular: the drill rod 100 is vibrated, and the vibration wave is transmitted to the drill bit 500, so that the advancing direction of the drill bit is controlled according to the coding and decoding. The sound wave transmission attenuation is fast, and a signal amplifying device is additionally arranged at intervals. Conventional logging tools may attenuate transmission of acoustic waves due to the large spacing between the drill bits 500 and the rods 100 caused by the length limitations of the insulated core rod. The application directly arranges the electrodes on the drill bit 500 and the drill rod 100, which can reduce the whole length of the matrix and shorten the interval between the drill rod 100 and the drill bit 500.
In one possible implementation, as shown in fig. 1, the drill bit and the drill rod are integrally made of metal conductors such as steel, the drill bit is integrally made of one electrode, the drill rod is integrally made of the other electrode, and the first insulating part and the second insulating part are arranged to insulate the two electrodes, so that the two electrodes can only be conducted through external rocks. The logging device is provided with only two electrodes, the two electrodes are electrically connected with a measuring interface of the resistivity measuring instrument, one electrode can be regarded as a measuring electrode, the other electrode can be regarded as a discharging electrode, and rocks communicated with the two electrodes can be regarded as a wire/measured (resistivity) element with a certain resistivity. Simple structure and easy manufacture.
Further, the logging device further comprises an electrode system, the electrode system comprises an electrode and a measuring device, the electrode is located at the drill bit and the drill rod, the measuring device is a resistivity measuring instrument, and the resistivity measuring instrument is installed on the detecting portion. Further, a resistivity detector is mounted inside the housing of the probe section.
In one possible implementation, as shown in fig. 2, the electrodes are ring-shaped structures, referred to as electrode rings. The drill rod 100 and the drill bit 500 are cylindrical, insulating seats 700 are annularly arranged on radial side walls of the drill rod 100 and the drill bit 500, the number of the insulating seats 700 is consistent with that of the electrode rings and are correspondingly arranged one by one, and more than two electrode rings are sleeved on the insulating seats 700; the base body is sequentially provided with a first insulating part 200, a detection part 300 and a second insulating part 400, opposite ends of the detection part 300 are respectively connected with one ends of the first insulating part 200 and the second insulating part 400, one axial end of the drill rod 100 is connected with one end of the first insulating part 200, which is away from the detection part 300, and one axial end of the drill bit 500 is connected with one end of the second insulating part 400, which is away from the detection part 300; the detecting part 300 is provided with a temperature sensor adapted to detect the temperature of the external environment.
The electrode rings are directly sleeved on the radial side walls of the drill bit 500 and the drill rod 100, the electrode rings are axially arranged at intervals, the electrodes are arranged in an insulating manner, and the resistivity of the external environment can be measured only through underground sediment communication and conduction. Because the electrode ring is directly sleeved on the thicker drill bit 500 and the side wall of the drill rod 100, the electrode ring can directly contact rock to be measured underground, an insulating core rod is not required to be additionally arranged between the drill bit 500 and the drill rod 100, the consumable of the part can be reduced, and only the detection part 300 is required to be arranged between the drill bit 500 and the drill rod 100 to install various sensors, so that the detection of other geophysical characteristics except resistivity is realized.
The electrode rings are sleeved on the drill bit 500 or the drill rod 100 through the insulating seat 700 so as to realize insulation between two adjacent electrode rings, and the detection accuracy of resistivity is ensured. The first insulating part 200 and the second insulating part 400 are part of an insulating connection between two electrode rings on both sides of the base body, and can secure an insulating effect.
The application does not limit the arrangement mode of each electrode ring in the electrode system, takes the function of detecting the underground resistivity in the logging process as a principle, and can be flexibly selected according to specific use requirements. The electrode ring arrangement structure of the two-side electrode system, the three-side electrode system or the seven-side electrode system may be adopted.
In one possible implementation, the detection portion 300 is further provided with a well deviation measuring instrument to detect well deviation.
In one possible implementation, the detection portion 300 is also provided with a gamma sensor to detect the radioactive material content of the downhole environment.
In one possible implementation, the detecting unit 300 is further provided with a communication device to be in communication connection with a surface device, and the output end of the electrode 600, the output end of the temperature sensor, the signal output end of the well deviation measuring instrument, and the signal output end of the gamma sensor are all electrically connected with the input end of the communication device.
In one possible implementation, the output of electrode 600 is provided with a signal line; the first insulation part 200 and the second insulation part 400 are integrally columnar, the first insulation part 200 is provided with a first threading hole in a penetrating way along the axial direction of the first insulation part 200, the second insulation part 400 is provided with a second threading hole in a penetrating way along the axial direction of the second insulation part 400, one end of the first threading hole along the axial direction of the first insulation part 200 is provided with a first inserting needle 220, one end of the second threading hole along the axial direction of the second insulation part 400 is provided with a second inserting hole 420, the opposite ends of the detection part are respectively provided with a first inserting hole 310 and a second inserting needle 320, and the first inserting hole 310 and the second inserting needle 320 are electrically connected with a communication device;
The electrode 600 signal line of the drill rod 100 penetrates the first insulation part 200 through the first threading hole and is electrically connected with the first pin 220, and the first pin 220 is electrically connected with the first insertion hole 310.
The electrode 600 signal line of the drill bit 500 penetrates the second insulation part 400 through the second threading hole and is electrically connected with the second insertion hole 420, and the second insertion hole 420 is electrically connected with the second contact pin 320.
The signal line of electrode 600 lays the casing inner core at the organism, has played certain mechanical shielding guard action to the signal line, can prolong the life of electrode 600 signal line, prevents that the signal line from droing the fracture that leads to in-process logging environment interference down hole, leads to logging device's electrode system detection inefficacy, is difficult to measure down hole environment resistivity.
The signal line is connected with the detecting part 300 through the pin jack, so that the operation is convenient, and the on-site installation is convenient. The signal processing circuit of the electrode system can be installed in the shell of the detecting part 300, the measurement result of the electrode 600 is electrically connected to the signal processing circuit of the detecting part 300 through a signal wire and a pin jack, the signal processing circuit performs comprehensive calculation, outputs a signal to a communication device, and transmits the signal to a ground device. The specific calculation can be performed by the ground device, and the specific calculation can be set according to the requirements of a measuring site.
In one possible implementation, one end of the first insulating portion 200 is provided with an internal thread, one end of the second insulating portion 400 is provided with an external thread, opposite ends of the detecting portion 300 are respectively provided with an internal thread and an external thread, the detecting portion 300 is in threaded connection with the first insulating portion 200, and the detecting portion 300 is in threaded connection with the second insulating portion 400. The contact pin jack junction has casing lateral wall to cover the protection, can avoid mechanical damage. The screw connection can enhance the connection stability of the first and second insulation parts 400 and the probe part 300.
In one possible implementation, the detection part is further provided with a reservoir; the output end of the electrode 600, the output end of the temperature sensor, the signal output end of the well deviation measuring instrument and the signal output end of the gamma sensor are all electrically connected with the input end of the storage device, so that the underground local storage backup is carried out, the well logging device can be recovered after the well logging is finished, and the content of the storage device is read.
In one possible implementation, one end of the first insulating part 200 is provided with a first connection part 210, one end of the first connection part 210, which faces away from the first insulating part 200, is provided with a first connection groove 211, the first connection groove 211 is matched with one end of the drill rod 100, and one end of the drill rod 100 is spliced with the first connection groove 211;
One end of the second insulation part 400 is provided with a second connection part 410, one end of the second connection part 410, which is away from the second insulation part 400, is provided with a second connection slot 411, the second connection slot 411 is matched with one end of the drill bit 500, and one end of the drill bit 500 is spliced with the second connection slot 411.
In one possible implementation, the detecting part 300 has a housing structure, and the temperature sensor is located inside the housing of the detecting part 300.
In one possible implementation, the outer portions of probe 300, first insulator 200, and second insulator 400 are cylindrical, the axial directions of drill rod 100, probe 300, and drill bit 500 are identical, the diameters of the cylindrical structures of drill bit 500 and drill rod 100 are identical, and the diameters of probe, first insulator 200, and second insulator 400 are identical and smaller than the diameter of drill rod 100. One end of the drill rod 100 is provided with a protrusion to be inserted into the first connecting groove 211, the outer portion of one end of the first connecting portion 210 close to the drill rod 100 is consistent with the diameter of the drill rod 100, one end of the first connecting portion 210 close to the first insulating portion 200 is provided with a rounded corner to smoothly shrink the diameter, and the diameter difference between the drill rod 100 and the first insulating portion 200 is smoothly transited through the rounded corner of the first connecting portion 210. The drilling end of the drill bit 500 is far away from the second insulation part 400, the drilling end of the drill bit 500 is provided with a round angle, and the diameter of the end of the drill bit 500 far away from the second insulation part 400 is smaller, so that the structure with thick upper part and thin lower part is formed, and drilling is facilitated. The end of the drill bit 500 adjacent to the second insulation part 400 is provided with a protrusion to be inserted into the second connection slot 411, and the outer portion of the end of the second connection part 410 adjacent to the drill bit 500 is identical to the diameter of the cylindrical structure of the drill bit 500. The second connection part 410 is provided at one end near the second connection part 410 with a rounded corner to smoothly contract the diameter, and the diameter difference between the last and the second insulation part 400 smoothly transits through the rounded corner of the second connection part 410.
The foregoing description of embodiments of the application has been presented for purposes of illustration and description, and is not intended to be exhaustive or limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the various embodiments described. The terminology used herein was chosen in order to best explain the principles of the embodiments, the practical application, or the improvement of technology in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.
Claims (10)
1. A logging device, comprising:
Drill pipe, base member and drill bit;
The drill bit and the drill rod are both provided with electrodes to detect the resistivity of the downhole environment;
The base body is sequentially provided with a first insulating part, a detection part and a second insulating part, the opposite ends of the detection part are respectively connected with one ends of the first insulating part and the second insulating part, one end of the drill rod is connected with one end of the first insulating part, which is away from the detection part, and one end of the drill bit is connected with one end of the second insulating part, which is away from the detection part;
The detection part is provided with a temperature sensor, and the temperature sensor is suitable for detecting the temperature of the external environment.
2. The logging apparatus of claim 1 wherein the detection section is further provided with a well deviation measuring instrument.
3. The logging device of claim 1, wherein the detection portion is further provided with a gamma sensor.
4. The logging device of claim 1, wherein the detection portion is further provided with a communication device to be in communication connection with a surface device, an output end of the electrode is electrically connected with an input end of the communication device, and an output end of the temperature sensor is electrically connected with the input end of the communication device.
5. The logging device of claim 4, wherein the output end of the electrode is provided with a signal line;
The first insulation part and the second insulation part are integrally columnar, the first insulation part is provided with a first threading hole in a penetrating mode along the axial direction of the first insulation part, the second insulation part is provided with a second threading hole in a penetrating mode along the axial direction of the second insulation part, one axial end of the first threading hole along the first insulation part is provided with a first contact pin, one axial end of the second threading hole along the second insulation part is provided with a second insertion hole, two opposite ends of the detection part are respectively provided with a first insertion hole and a second contact pin, and the first insertion hole and the second contact pin are electrically connected with the communication device;
The electrode signal wire of the drill rod penetrates through the first insulation part through the first threading hole and is electrically connected with the first contact pin, and the first contact pin is electrically connected with the first jack;
The electrode signal wire of the drill bit penetrates through the second insulation part through the second threading hole and is electrically connected with the second jack, and the second jack is electrically connected with the second contact pin.
6. The logging device of claim 5, wherein one end of the first insulating portion is provided with an internal thread, one end of the second insulating portion is provided with an external thread, opposite ends of the detecting portion are respectively provided with an internal thread and an external thread, the detecting portion is in threaded connection with the first insulating portion, and the detecting portion is in threaded connection with the second insulating portion.
7. The logging device of claim 4, wherein the detection portion is further provided with a reservoir;
The output end of the electrode is electrically connected with the input end of the storage, and the output end of the temperature sensor is electrically connected with the input end of the storage.
8. The logging device of claim 1, wherein a first connecting portion is provided at one end of the first insulating portion, a first connecting groove is provided at one end of the first connecting portion facing away from the first insulating portion, the first connecting groove is matched with one end of the drill rod, and one end of the drill rod is spliced with the first connecting groove;
One end of the second insulating part is provided with a second connecting part, one end of the second connecting part deviating from the second insulating part is provided with a second connecting groove, the second connecting groove is matched with one end of the drill bit, and one end of the drill bit is spliced with the second connecting groove.
9. The logging device of claim 1, wherein the detection section is in a housing configuration and the temperature sensor is located within a housing of the detection section.
10. The logging apparatus of claim 9 wherein the probe is cylindrical in shape and the drill pipe, the probe and the drill bit are axially aligned, the probe cylindrical structure having a diameter less than the diameter of the drill bit cylindrical structure and the probe cylindrical structure having a diameter less than the diameter of the drill pipe cylindrical structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323308453.4U CN221074235U (en) | 2023-12-05 | 2023-12-05 | Logging device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323308453.4U CN221074235U (en) | 2023-12-05 | 2023-12-05 | Logging device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221074235U true CN221074235U (en) | 2024-06-04 |
Family
ID=91249745
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202323308453.4U Active CN221074235U (en) | 2023-12-05 | 2023-12-05 | Logging device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221074235U (en) |
-
2023
- 2023-12-05 CN CN202323308453.4U patent/CN221074235U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| RU2459221C2 (en) | Instruments to log resistances with matched antennas | |
| RU2475645C2 (en) | Resistivity tools with bearing segmented antennas with azimuth sensitivity and methods of their production | |
| JP6186336B2 (en) | Inductive broadband three-component borehole magnetic field measurement sensor and borehole electromagnetic exploration method using the same | |
| RU2104566C1 (en) | Device for mining hole logging | |
| CA2593943C (en) | Integrated electrode resistivity and em telemetry tool | |
| US9322796B2 (en) | Fluid resistivity sensor | |
| EP3356638B1 (en) | Optical rotary joint in coiled tubing applications | |
| US11892695B2 (en) | Hybrid electro-optic wireline cable | |
| US7671597B2 (en) | Composite encased tool for subsurface measurements | |
| JP2021533290A (en) | A device for acquiring and communicating data between strings in oil and gas wells. | |
| CN112302619A (en) | Resistivity instrument for imaging while drilling | |
| CN221074235U (en) | Logging device | |
| CN110542930A (en) | Device and system for detecting damage information of sleeve | |
| CN114263454B (en) | Current linear injection device and injection method | |
| CN210666050U (en) | Device and system for detecting damage information of sleeve | |
| JPH06130158A (en) | Method and device for detecting layer in high resolution | |
| CN111927427A (en) | Oil gas well optical cable multi-parameter measuring device | |
| CN219452084U (en) | Wireless communication connection structure of logging instrument | |
| CN220869389U (en) | Multifunctional combined logging instrument | |
| CN114706132B (en) | Underground cable detection device and manufacturing method of drilling and boring integrated equipment | |
| CN213750357U (en) | Tunnel geology advance forecast geophysical prospecting instrument | |
| US10663435B2 (en) | Acoustic receivers with cylindrical crystals | |
| CN111287737A (en) | While-drilling multipole acoustic wave imaging logging device | |
| CN115628042A (en) | Line source-based three-electrode system post-casing reservoir monitoring system and method | |
| CN116224445A (en) | Electromagnetic imaging device and method while drilling |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |