CN113266336A - Vertical seismic logging instrument acquisition nipple for fracture monitoring - Google Patents
Vertical seismic logging instrument acquisition nipple for fracture monitoring Download PDFInfo
- Publication number
- CN113266336A CN113266336A CN202110448007.XA CN202110448007A CN113266336A CN 113266336 A CN113266336 A CN 113266336A CN 202110448007 A CN202110448007 A CN 202110448007A CN 113266336 A CN113266336 A CN 113266336A
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- pressure
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- push rod
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 27
- 210000002445 nipple Anatomy 0.000 title claims description 15
- 238000001514 detection method Methods 0.000 claims abstract description 30
- 230000008602 contraction Effects 0.000 claims abstract description 8
- 238000007789 sealing Methods 0.000 claims description 22
- 238000000034 method Methods 0.000 claims description 9
- 230000008569 process Effects 0.000 claims description 9
- 239000003638 chemical reducing agent Substances 0.000 claims description 8
- 230000008878 coupling Effects 0.000 claims description 3
- 238000010168 coupling process Methods 0.000 claims description 3
- 238000005859 coupling reaction Methods 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims 3
- 230000006835 compression Effects 0.000 claims 1
- 238000007906 compression Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
- G01V1/40—Seismology; Seismic or acoustic prospecting or detecting specially adapted for well-logging
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- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Fluid Mechanics (AREA)
- Geochemistry & Mineralogy (AREA)
- Geophysics (AREA)
- Acoustics & Sound (AREA)
- Remote Sensing (AREA)
- General Physics & Mathematics (AREA)
- Geophysics And Detection Of Objects (AREA)
Abstract
The invention provides a vertical seismic logging instrument acquisition short section for fracture monitoring, which comprises a pressure-bearing shell, a power device, a telescopic sidewall contact device, a detection device and a ground control system. The power device, the pushing device and the detection device are all arranged in the pressure-bearing shell, the power device is connected with the pushing device, and the ground control system is respectively electrically connected with the power device and the detection device. The outer dimension of the pushing device in a contraction state is not larger than that of the pressure-bearing shell, and the pushing device can be supported on a well wall in an expansion state. According to the acquisition short section provided by the invention, the power device is controlled by the ground control system to realize the contraction and expansion of the pushing device, so that the pushing device can still keep the expanded state to be supported on the well wall when the power device is powered off, the detection device keeps the same posture in the well, the next fracturing is detected, the damage of instruments is greatly reduced, and the cost is saved.
Description
Technical Field
The invention relates to the technical field of seismic surveying, in particular to a vertical seismic logging instrument acquisition short section for fracture monitoring.
Background
The geophone of the vertical seismic logging instrument is used as a sensor and is arranged and fixed in a protective shell, when the geophone is used, in order to obtain accurate and clear signals and parameter values, the geophone is generally required to be in close contact with the ground or the wall surface of a hole to be detected, the pushing position is accurate, the geophone is arranged, the acquisition time for picking up seismic signals is shortened, whether the geophone is well coupled with the rock stratum of the underground well wall or not is judged, the correctness of monitoring the seismic signals is directly determined, and the geophone can only play a role in relevant analysis if the geophone correctly picks up the seismic signals. The geophone or geophone string used on land is generally inserted and fixed on the ground by a tail cone arranged at the lower end of the acquisition instrument, and is not suitable for some special measurements such as underground seismic wave acquisition and the like.
At present, there are also logging geophone devices, which include a main body connected with a signal receiving device, a pushing device, a signal transmission cable, a lifting rope, etc., wherein the pushing device is powered on all the time to open the legs, while in fracture monitoring, the instrument needs to be soaked in the well for a long time, and the instrument is damaged by continuous power-on in a high-temperature and high-pressure environment in the well.
Disclosure of Invention
The technical problem to be solved by the invention is to overcome the defects of the prior art and provide the vertical seismic logging instrument acquisition short section for fracture monitoring, the backup device is still in an open state after power is turned off, and the posture of the instrument in a well is kept unchanged so as to monitor the next fracture.
In order to solve the technical problems, the technical scheme provided by the invention is as follows:
a vertical seismic logging instrument acquisition short section for fracture monitoring comprises a pressure-bearing shell, a power device, a telescopic sidewall contact device, a detection device and a ground control system. The power device, the pushing device and the detection device are all arranged in the pressure-bearing shell, the power device is connected with the pushing device, and the ground control system is respectively electrically connected with the power device and the detection device. The outer dimension of the pushing device in a contraction state is not larger than that of the pressure-bearing shell, and the pushing device can be supported on a well wall in an expansion state.
According to the vertical seismic logging instrument acquisition short section for fracture monitoring, the power device is controlled by the ground control system to realize the contraction and expansion of the pushing device, so that the pushing device can still be supported on a well wall in an expanded state when the power device is powered off, the detection device keeps the same posture in the well, the next fracture is detected, the damage of the instrument is reduced to the greatest extent, and the cost is saved.
With respect to the above technical solution, further improvements as described below can be made.
According to the vertical seismic logging instrument acquisition short joint for fracture monitoring, in a preferred embodiment, the power device comprises a motor assembly and a speed reducer connected with a motor output shaft of the motor assembly, and the motor assembly is located at one end in the pressure-bearing shell.
Through the power device with the matched motor and the speed reducer, the power input of the pushing device is convenient to realize, and the stable and reliable working process of the pushing device is ensured.
Further, in a preferred embodiment, the speed reducer is connected with the pushing device through a lead screw, a nut is sleeved on the lead screw and connected with the pushing device through a pressing ring, and the lead screw is fixed on the pressure-bearing shell through a bearing and a lead screw shell.
The rotary motion of the screw rod in the structure is converted into the axial reciprocating motion of the pushing device to realize the opening and the retraction of the pushing device, and the bearing can effectively bear the axial load of the screw rod and improve the structural stability of the pushing device.
In particular, in a preferred embodiment, the pushing means comprises a push rod, a connecting block and a pushing arm. Wherein, the push rod both ends are connected with lead screw and connecting block respectively, are equipped with the connecting rod of being connected with the arm that leans on the connecting block, are rotation connection between connecting rod and the connecting block and the arm that leans on. The outer side surface of the push rod is sleeved with an elastic supporting component connected with the connecting block. The leaning arm is contracted and expanded in the rotating process of the connecting rod.
Specifically, under the transmission effect of lead screw, when the push rod moved left, the elastic support part promoted the connecting block, and the connecting block drove the connecting rod, and the connecting rod drove to lean on the arm rotation and open, realized pushing against the function and support on the wall of a well. After the pushing arm is pushed, the motor assembly is powered off, the screw rod and the push rod are not moved, and the pushing arm is still in an opening pushing state until the detection device finishes detection work. After the motor assembly is powered on, when the push rod moves rightwards, the push rod drives the connecting block to move, the connecting block drives the connecting rod, the connecting rod drives the pushing arm to rotate to be folded, the pushing arm is retracted, and the whole working process is stable and reliable.
Further, in a preferred embodiment, the end of the push rod far away from the screw rod is connected with the pressure-bearing shell through a bushing.
Realize the fixed connection of push rod and pressure-bearing shell through the bush, can ensure the structural stability and the structural strength of whole collection nipple joint.
Further, in a preferred embodiment, a sealing ring is arranged between the bushing and the push rod and between the bushing and the pressure-bearing shell.
Through further setting up the sealing washer, can further guarantee to gather the inside sealing performance of nipple joint, improve the life who gathers the nipple joint in the very big degree.
Further, in a preferred embodiment, a sealing sleeve is sleeved on the outer side surface of the part, connected with the screw rod, of the push rod, and the sealing sleeve is connected with the screw rod shell.
Through setting up the seal cover, can play fine sealed effect to the push rod, improve whole pushing away the reliability of device.
Further, in a preferred embodiment, sealing rings are arranged between the sealing sleeve and the pressure-bearing shell and between the sealing sleeve and the push rod.
Through further setting up the sealing washer, can further guarantee to gather the inside sealing performance of nipple joint, improve the life who gathers the nipple joint in the very big degree.
Specifically, in a preferred embodiment, the detection device includes a geophone assembly and a circuit board assembly. The detector assembly comprises at least two detectors, and the circuit board assembly at least comprises two circuit frameworks and a collecting board, a power board and a coupling board which are respectively arranged on the circuit frameworks. The detectors are respectively fixed on the circuit framework through the detector shells and then are arranged in the pressure-bearing shell.
The detector is used for detecting an uplink longitudinal wave and an uplink converted wave which are transmitted from bottom to top, a downlink longitudinal wave and a downlink converted wave which are transmitted from top to bottom and a transverse wave signal. The detection device with the structure can well complete logging work and process detection data.
Further, in a preferred embodiment, the lower end of the circuit board assembly is provided with at least two positioning pins.
The positioning pin is used for positioning when being connected with an interstage cable, and is convenient for detection operation.
Compared with the prior art, the invention has the advantages that: the power device is controlled by the bottom ground control system to realize the contraction and expansion of the pushing device, so that the pushing device can still be supported on the well wall in an expanded state when the power device is powered off, the detection device keeps the same posture in the well, the next fracturing is detected, the damage of an instrument is reduced to the greatest extent, and the cost is saved.
Drawings
The invention will be described in more detail hereinafter on the basis of embodiments and with reference to the accompanying drawings. Wherein:
fig. 1 schematically shows an overall structure of a collection nipple according to an embodiment of the present invention;
FIG. 2 is a cross-sectional view taken along line B-B of FIG. 1;
FIG. 3 is a cross-sectional view taken along line C-C of FIG. 2;
fig. 4 is a cross-sectional view taken along line D-D in fig. 1.
Detailed Description
The invention will be further explained in detail with reference to the figures and the embodiments without thereby limiting the scope of protection of the invention.
Fig. 1 schematically shows the overall structure of a collecting sub 10 according to an embodiment of the present invention. FIG. 2 is a cross-sectional view taken along line B-B of FIG. 1. Fig. 3 is a cross-sectional view taken along line C-C in fig. 2. Fig. 4 is a cross-sectional view taken along line D-D in fig. 1.
As shown in fig. 1, the vertical seismic logging instrument acquisition sub 100 for fracture monitoring in the embodiment of the invention comprises a pressure-bearing housing 10, a power device 20, a telescopic sidewall contact device 30, a detection device 40 and a ground control system. The power device 20, the pushing device 30 and the detection device 40 are all arranged in the pressure-bearing shell 10, the power device 20 is connected with the pushing device 30, and the ground control system is respectively electrically connected with the power device 20 and the detection device 40. The external dimension of the pushing device 30 in a contraction state is not larger than that of the pressure-bearing shell 10, and the pushing device 30 can be supported on a well wall in an expansion state.
According to the vertical seismic logging instrument acquisition short section for fracture monitoring, the power device is controlled by the bottom ground control system to realize the contraction and expansion of the pushing device, so that the pushing device can still be supported on a well wall in an expanded state when the power device is powered off, the detection device keeps the same posture in the well, the next fracture is detected, the damage of the instrument is reduced to the greatest extent, and the cost is saved.
Specifically, in the embodiment, as shown in fig. 1, the power device 20 includes a motor assembly 21 and a speed reducer 22 connected to a motor output shaft of the motor assembly 21, and the motor assembly 21 is located at one end in the pressure-bearing housing 10. Through the power device with the matched motor and the speed reducer, the power input of the pushing device is convenient to realize, and the stable and reliable working process of the pushing device is ensured. Further, in the present embodiment, the speed reducer 22 is connected to the pushing device 30 through a lead screw 23, a nut 24 is sleeved on the lead screw 23, the lead screw 23 and the nut 24 are in threaded fit connection, the nut 24 is fixed to the pushing device 30 through a pressing ring 205, the lead screw 23 is fixed to the pressure-bearing housing 10 through a bearing 26 and a lead screw housing 27, and the motor assembly 21 is connected to the lead screw housing 27 through a screw. The rotary motion of the screw rod in the structure is converted into the axial reciprocating motion of the pushing device to realize the opening and the retraction of the pushing device, and the bearing can effectively bear the axial load of the screw rod and improve the structural stability of the pushing device.
Specifically, as shown in fig. 1 and 4, in the present embodiment, the pushing device 30 includes a push rod 31, a connecting block 32, and a pushing arm 33. The two ends of the push rod 31 are respectively connected with the screw 23 and the connecting block 32, the connecting block 32 is provided with a connecting rod 34 connected with the leaning arm 33, the connecting rod 34 is rotatably connected with the connecting block 32 and the leaning arm 33 through a pin 35, and the leaning arm 33 is rotatably connected with the pressure-bearing shell 10 through a pin 35. The outer side surface of the push rod 31 is sleeved with a spring 36 connected with the connecting block 32. The push arms 33 contract and expand during rotation of the links 34. Preferably, a mounting groove matched with the end of the push rod 31 is arranged in the connecting block 32, and a part matched with the leaning arm 33 is arranged on the pressure-bearing shell 10. Specifically, under the transmission effect of lead screw, when the push rod was left or upwards removed, the elastic support part promoted the connecting block, and the connecting block drives the connecting rod, and the connecting rod drives to lean on the arm rotation and opens, realizes pushing against the function and supports on the wall of a well. After the pushing arm is pushed, the motor assembly is powered off, the screw rod and the push rod are not moved, and the pushing arm is still in an opening pushing state until the detection device finishes detection work. After the motor assembly is powered on, when the push rod moves rightwards or downwards, the push rod drives the connecting block to move, the connecting block drives the connecting rod, the connecting rod drives the pushing arm to rotate to be folded, the pushing arm is retracted, and the whole working process is stable and reliable.
Further, in the present embodiment, as shown in fig. 1, an end of the push rod 31 far from the lead screw 23 is connected to the pressure-bearing housing 10 through a bushing 37. Realize the fixed connection of push rod and pressure-bearing shell through the bush, can ensure the structural stability and the structural strength of whole collection nipple joint. Preferably, in the present embodiment, an O-ring is disposed between the bushing 37 and the push rod 31 and the pressure-bearing housing 10. Through further setting up the sealing washer, can further guarantee to gather the inside sealing performance of nipple joint, improve the life who gathers the nipple joint in the very big degree.
As shown in fig. 1, in the present embodiment, a sealing sleeve 28 is sleeved on an outer side surface of a portion of the push rod 31 connected to the lead screw 23, and the sealing sleeve 28 is connected to the lead screw housing 27 by a screw. Through setting up the seal cover, can play fine sealed effect to the push rod, improve whole pushing away the reliability of device. Further, in the present embodiment, O-ring seals are disposed between the sealing sleeve 28 and the pressure-bearing housing 10 and the push rod 31. Through further setting up the sealing washer, can further guarantee to gather the inside sealing performance of nipple joint, improve the life who gathers the nipple joint in the very big degree.
As shown in fig. 1 to 3, in particular, in the present embodiment, the detection device 40 includes a geophone unit and a circuit board unit. The detector assembly comprises at least two detectors 41, and the circuit board assembly comprises at least two circuit frameworks 42, and a collecting board 43, a power board 44 and a coupling board 45 which are respectively arranged on the circuit frameworks 42. The detectors 41 are respectively fixed on the circuit framework 42 through the detector housings 47 and then arranged in the pressure-bearing housing 10. The detector is used for detecting an uplink longitudinal wave and an uplink converted wave which are transmitted from bottom to top, a downlink longitudinal wave and a downlink converted wave which are transmitted from top to bottom and a transverse wave signal. The detection device with the structure can well complete logging work and process detection data. Further, in the present embodiment, the lower end of the circuit board assembly is provided with at least two positioning pins 46. The positioning pin is used for positioning when being connected with an interstage cable, and is convenient for detection operation.
Specifically, the working process of the vertical seismic logging instrument acquisition nipple 100 for fracture monitoring in the embodiment of the invention is as follows:
the vertical seismic logging instrument acquisition short section 100 for fracture monitoring is placed in a monitoring well at the periphery of the fracturing well before fracturing, a power supply of a motor assembly is connected through a ground control system, a lead screw is driven to rotate, the lead screw and a push rod are connected into a whole, when the lead screw rotates to drive the lead screw and the push rod to move upwards, a spring pushes a connecting block, the connecting block drives a connecting rod, the connecting rod drives a pushing arm to rotate and open around a pin, a pushing function is realized, and a detector is pushed and attached to a well wall to perform monitoring operation.
According to the embodiment, the vertical seismic logging instrument acquisition short section for fracture monitoring controls the power device to contract and expand through the ground control system, so that the pushing device can still be supported on a well wall in an expanded state when the power device is powered off, the detection device keeps the same posture in the well and detects the next fracture, the damage of the instrument is greatly reduced, and the cost is saved.
While the invention has been described with reference to a preferred embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. It is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.
Claims (10)
1. A vertical seismic logging instrument acquisition short section for fracture monitoring is characterized by comprising a pressure-bearing shell, a power device, a telescopic sidewall contact device, a detection device and a ground control system; wherein the content of the first and second substances,
the power device, the pushing device and the detection device are all arranged in the pressure-bearing shell, the power device is connected with the pushing device, and the ground control system is respectively electrically connected with the power device and the detection device;
the outer dimension of the pushing device in a contraction state is not larger than that of the pressure-bearing shell, and the pushing device can be supported on a well wall in an expansion state.
2. The vertical seismic logging instrument acquisition sub for fracture monitoring as claimed in claim 1, wherein the power device comprises a motor assembly and a reducer connected with a motor output shaft of the motor assembly, and the motor assembly is located at one end in the pressure-bearing shell.
3. The vertical seismic logging instrument acquisition nipple for fracture monitoring according to claim 2, wherein the reducer is connected with the backup device through a lead screw, a nut is sleeved on the lead screw and connected with the backup device through a compression ring, and the lead screw is fixed on the pressure-bearing shell through a bearing and a lead screw shell.
4. The vertical seismic tool acquisition sub for fracture monitoring of claim 3, wherein the thrust means comprises a push rod, a connecting block and a thrust arm; wherein the content of the first and second substances,
the two ends of the push rod are respectively connected with the lead screw and the connecting block, a connecting rod connected with the backup arm is arranged on the connecting block, and the connecting rod is rotatably connected with the connecting block and the backup arm;
the outer side surface of the push rod is sleeved with an elastic supporting component connected with the connecting block;
the leaning arm contracts and expands in the rotating process of the connecting rod.
5. The vertical seismic logging instrument acquisition sub for fracture monitoring as claimed in claim 4, wherein the end of the push rod remote from the lead screw is connected with the pressure-bearing housing through a bushing.
6. The vertical seismic tool acquisition sub for fracture monitoring as claimed in claim 5, wherein a sealing ring is provided between the bushing and the push rod and the pressure-bearing housing.
7. The vertical seismic logging instrument acquisition sub for fracture monitoring as claimed in any one of claims 4 to 6, wherein a sealing sleeve is sleeved on the outer side surface of the part of the push rod connected with the screw rod, and the sealing sleeve is connected with the screw rod housing.
8. The vertical seismic logging instrument acquisition sub for fracture monitoring as claimed in claim 7, wherein sealing rings are provided between the sealing boot and the pressure-bearing housing and the push rod.
9. The vertical seismic tool acquisition sub for fracture monitoring according to any one of claims 1 to 6, wherein the detection device comprises a geophone assembly and a circuit board assembly; wherein the content of the first and second substances,
the detector assembly comprises at least two detectors, and the circuit board assembly at least comprises two circuit frameworks, and a collecting board, a power board and a coupling board which are respectively arranged on the circuit frameworks;
the detectors are respectively fixed on the circuit framework through the detector shells and then are arranged in the pressure-bearing shell.
10. The vertical seismic tool acquisition sub for fracture monitoring of claim 9, wherein the lower end of the circuit board assembly is provided with at least two locating pins.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110448007.XA CN113266336A (en) | 2021-04-25 | 2021-04-25 | Vertical seismic logging instrument acquisition nipple for fracture monitoring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110448007.XA CN113266336A (en) | 2021-04-25 | 2021-04-25 | Vertical seismic logging instrument acquisition nipple for fracture monitoring |
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| CN113266336A true CN113266336A (en) | 2021-08-17 |
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| CN202110448007.XA Pending CN113266336A (en) | 2021-04-25 | 2021-04-25 | Vertical seismic logging instrument acquisition nipple for fracture monitoring |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113863881A (en) * | 2021-10-25 | 2021-12-31 | 杭州瑞利声电技术有限公司 | Logging instrument pushing device capable of being automatically folded |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2707236A1 (en) * | 2009-06-15 | 2010-12-15 | Schlumberger Canada Limited | Formation coring apparatus and methods |
| CN103711481A (en) * | 2013-12-31 | 2014-04-09 | 中国海洋石油总公司 | Instrument pressure-bearing connecting device and structure |
| CN108266145A (en) * | 2016-12-30 | 2018-07-10 | 中国石油天然气股份有限公司 | Pushing device and with its logger |
| CN209385123U (en) * | 2018-12-21 | 2019-09-13 | 巴州大朴石油技术服务有限公司 | A kind of automatically controlled eccentric of neutron |
-
2021
- 2021-04-25 CN CN202110448007.XA patent/CN113266336A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2707236A1 (en) * | 2009-06-15 | 2010-12-15 | Schlumberger Canada Limited | Formation coring apparatus and methods |
| CN103711481A (en) * | 2013-12-31 | 2014-04-09 | 中国海洋石油总公司 | Instrument pressure-bearing connecting device and structure |
| CN108266145A (en) * | 2016-12-30 | 2018-07-10 | 中国石油天然气股份有限公司 | Pushing device and with its logger |
| CN209385123U (en) * | 2018-12-21 | 2019-09-13 | 巴州大朴石油技术服务有限公司 | A kind of automatically controlled eccentric of neutron |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113863881A (en) * | 2021-10-25 | 2021-12-31 | 杭州瑞利声电技术有限公司 | Logging instrument pushing device capable of being automatically folded |
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