CN110541701B - Logging cable depth measuring device and using method thereof - Google Patents
Logging cable depth measuring device and using method thereof Download PDFInfo
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- CN110541701B CN110541701B CN201910898900.5A CN201910898900A CN110541701B CN 110541701 B CN110541701 B CN 110541701B CN 201910898900 A CN201910898900 A CN 201910898900A CN 110541701 B CN110541701 B CN 110541701B
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- 238000000034 method Methods 0.000 title claims abstract description 15
- 230000008602 contraction Effects 0.000 claims description 17
- 238000005096 rolling process Methods 0.000 claims description 6
- 230000009471 action Effects 0.000 claims description 4
- 238000001125 extrusion Methods 0.000 claims description 3
- 238000001514 detection method Methods 0.000 abstract description 3
- 238000009434 installation Methods 0.000 abstract description 3
- 230000008878 coupling Effects 0.000 description 4
- 238000010168 coupling process Methods 0.000 description 4
- 238000005859 coupling reaction Methods 0.000 description 4
- 238000005259 measurement Methods 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 230000009191 jumping Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
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
- E21B47/04—Measuring depth or liquid level
-
- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A90/00—Technologies having an indirect contribution to adaptation to climate change
- Y02A90/30—Assessment of water resources
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
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- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- A Measuring Device Byusing Mechanical Method (AREA)
Abstract
The invention discloses a logging cable depth measuring device and a using method of the cable measuring device, wherein the logging cable depth measuring device comprises the following steps: the device comprises an upper measuring structure and a lower clamping structure, wherein the upper measuring structure is hinged with one end of the lower clamping structure, and the other ends of the upper measuring structure and the lower clamping structure are connected through a quick pin; the front end and the rear end of the upper measuring structure are respectively provided with an upper vertical limiting wheel, the lower clamping structure is provided with a lower vertical limiting wheel matched with the upper vertical limiting wheel, and a limiting interval is formed between the upper vertical limiting wheel and the lower vertical limiting wheel; through pulling out quick round pin, down press from both sides tight structure and rotate downwards around its articulated department, spacing interval is opened, and the cable is put into spacing interval to the installation and the dismantlement efficiency of cable on detection device have been improved.
Description
Technical Field
The invention relates to the technical field of petroleum wells, in particular to a logging cable depth measuring device and a using method of the cable measuring device.
Background
Ma Dingdai g depth metering system is part of the depth metering system. In the logging process, the accuracy and the reliability of a depth system are important for acquiring high-quality logging data. The existing Ma Dingdai g can measure cables with different thickness by arranging an elastic adjustable interval between two measuring wheels, but the arrangement is inconvenient for installing and detaching the cables in the measuring device.
Disclosure of Invention
The invention aims to: in order to overcome the defects in the prior art, the invention provides a logging cable depth measuring device and a using method of the cable measuring device, which can solve the problems.
The technical scheme is as follows: to achieve the above object, the present invention provides a logging cable depth measuring device: the device comprises an upper measuring structure and a lower clamping structure, wherein the upper measuring structure is hinged with one end of the lower clamping structure, and the other ends of the upper measuring structure and the lower clamping structure are connected through a quick pin; the front end and the rear end of the upper measuring structure are respectively provided with an upper vertical limiting wheel, the lower clamping structure is provided with a lower vertical limiting wheel matched with the upper vertical limiting wheel, and a limiting interval is formed between the upper vertical limiting wheel and the lower vertical limiting wheel; through pulling out quick round pin, down press from both sides tight structure and rotate downwards around its articulated department, spacing interval is opened, and the cable is put into spacing interval to the installation and the dismantlement efficiency of cable on detection device have been improved.
Further, the upper measuring structure comprises a frame, a measuring wheel structure is horizontally arranged below the frame, a supporting frame is arranged on the measuring wheel structure, the supporting frame is connected to the side of the frame, and the measuring wheel structure is horizontally and rotatably arranged around a hinge joint of the measuring wheel structure; the two measuring wheel structures are provided with contraction springs, the straight line where the contraction springs are positioned is connected and overlapped with the centers of the two measuring wheel structures, and the two measuring wheel structures are tensioned towards the centers of the two measuring wheel structures through the contraction springs; the cable passes through the clearance department between two measuring wheels to drive the measuring wheel rotation setting, through being provided with the shrink spring, thereby can effectively change the clearance between two measuring wheels, thereby make the measuring wheel measure the measurement of the circuit cable of multiple size.
Further, the measuring wheel structure comprises a supporting frame and a measuring wheel, wherein a connecting hole is formed in the side end of the supporting frame, and the measuring wheel structure is fixedly arranged with one end of the supporting frame through the connecting hole; the one end that the connecting hole was kept away from to the support frame is provided with the rotation hole, the measuring wheel sets up under the support frame rotation hole, the fixed connecting axle that is provided with in center of measuring wheel, the top of connecting axle sets up in the rotation hole of support frame from the bottom up, and the measuring wheel rotates the setting in the support frame below.
Further, a ball bearing is arranged in the support frame rotating hole, and the upper end part of the connecting shaft is sleeved on the ball bearing; the connecting shaft is provided with a positioning baffle which is propped against the ball bearing; and a mud guard is arranged outside the measuring wheel.
Further, the measuring wheel structure comprises an encoder, the encoder is arranged above the supporting frame, and the rotating shaft of the encoder is connected with the top end of the connecting shaft through a coupler; the measuring wheel rotates to drive the encoder pivot and rotate, set up like this and make the measuring wheel drive the pivot pivoted stability of encoder better, more be favorable to the encoder to measure the cable degree of depth.
Further, the front end and the rear end of the upper measuring structure are respectively provided with a horizontal guide wheel set, the middle of the horizontal guide wheel set is provided with a guide through groove, and a cable sequentially passes through the guide through groove and the limiting section along the linear direction and is clamped in a gap between the two measuring wheels; the horizontal guide wheel group plays a role in preventing the cable from deflecting left and right.
Further, the horizontal guide wheel group consists of two rollers which are horizontally arranged in a rolling way, and the outer end surfaces of the rollers are in contact rolling way; the outer end surface of the roller is concavely provided with a guide through groove, and the size of the guide through groove is matched with the outer diameter of the cable.
A logging cable depth measuring device and a using method of the cable measuring device are provided, wherein the using method comprises the following steps: the cable drives the measuring wheel to roll, the depth of the cable is equal to the thread rotated by the outer end surface of the measuring wheel, and thus the depth of the cable can be measured by calculating the thread rotated by the outer end surface of the measuring wheel; the method comprises the following specific steps:
step 1, enabling a cable to enter a measuring device; pulling out a quick pin between the upper measuring structure and the lower clamping structure, separating the upper measuring structure from the lower clamping structure, opening a limiting interval formed between the upper vertical limiting wheel and the lower vertical limiting wheel, and enabling a cable to pass through a guide through groove of a horizontal guide wheel set of a wire inlet end of the measuring device and to be inserted into the limiting interval;
step 2, the outer end surface of the measuring wheel is fixedly arranged with the cable in an extrusion mode; the pressing handle is pulled backwards, so that the two measuring wheels are far away from each other under the drive of the supporting frame, and a cable penetrates through a gap between the two measuring wheels; then the pressing handle is pulled forwards, the two measuring wheels are mutually pressed under the action of the contraction spring, and the cable is pressed in the gap between the two measuring wheels; meanwhile, the measuring wheel is arranged right below the rotating hole of the supporting frame, a connecting shaft is fixedly arranged in the center of the measuring wheel, the top end of the connecting shaft is arranged in the rotating hole of the supporting frame from bottom to top, and the measuring wheel is arranged below the supporting frame in a rotating way; when the cable moves, the cable drives the measuring wheel to rotate;
step 3, after the cable reaches the target depth, measuring the number of turns of the wheel; a ball bearing is arranged in the support frame rotating hole, and the upper end part of the connecting shaft is sleeved on the ball bearing; the connecting shaft is provided with a positioning baffle, the positioning baffle is propped against the ball bearing, the encoder is arranged above the supporting frame, and the encoder rotating shaft is connected with the top end of the connecting shaft through a coupling; the measuring wheel rotates, so that the rotating shaft of the encoder is driven to rotate; the encoder is coaxially connected with the measuring wheel, so that the measured number of turns on the encoder is the number of turns of the measuring wheel;
step 4, calculating the length of the cable through a measuring wheel; the length of the cable is obtained by multiplying the circumference of the outer end surface of the measuring wheel by the number of turns of the measuring wheel.
The beneficial effects are that: according to the logging cable depth measuring device and the using method of the logging cable depth measuring device, the vertical limiting interval capable of being opened and closed is arranged, so that the cable is very convenient to install and detach; meanwhile, the measuring wheel is hinged on the frame through the supporting frame, and the gap between the two measuring wheels can be changed through the expansion and contraction of the contraction spring, so that the outer end part of the measuring wheel can be always clung to the cable, the cable can be ensured not to be clamped, and the movement of the cable can drive the measuring wheel to rotate.
Drawings
FIG. 1 is a schematic diagram of the front view of the measuring device of the present invention;
FIG. 2 is a schematic top view of the measuring device of the present invention;
FIG. 3 is a schematic side view of the measuring device of the present invention;
fig. 4 is a schematic cross-sectional view of the measuring wheel structure of the present invention.
Detailed Description
The invention will be further described with reference to the accompanying drawings.
A logging cable depth measurement apparatus as shown in figures 1 to 4: the device comprises an upper measuring structure 1 and a lower clamping structure 2, wherein the upper measuring structure 1 is hinged with one end of the lower clamping structure 2, and the other ends of the upper measuring structure 1 and the lower clamping structure 2 are connected through a quick pin 3; the front and rear ends of the upper measuring structure 1 are respectively provided with an upper vertical limiting wheel 11, and the outer surface of the upper vertical limiting wheel 11 is recessed to the middle along two sides of the upper vertical limiting wheel to form a limiting groove. The lower clamping structure 2 is provided with a lower vertical limiting wheel 21 matched with the upper vertical limiting wheel 11, a limiting interval is formed between the upper vertical limiting wheel 11 and the lower vertical limiting wheel 21, a cable is clamped into the limiting interval, and the limiting interval plays a role in preventing the cable from vertically jumping away from the two measuring wheels; through pulling out quick round pin, lower clamp structure 2 rotates downwards around its articulated department, and spacing interval is opened, is favorable to setting up the cable in spacing interval like this fast to the installation and the dismantlement efficiency of cable on detection device have been improved.
The upper measuring structure 1 comprises a frame 10, a measuring wheel structure 13 is horizontally arranged below the frame 10, a supporting frame 14 is arranged on the measuring wheel structure 13, the supporting frame 14 is connected to the side of the frame 10, and the measuring wheel structure 13 is horizontally rotatably arranged around a hinge joint of the measuring wheel structure 13; the two measuring wheel structures 13 are provided with the contraction springs 15, the straight lines where the contraction springs 15 are positioned are connected and overlapped with the centers of the two measuring wheel structures 13, the two measuring wheel structures 13 are tensioned towards the centers of the two measuring wheel structures through the contraction springs 15, and when a cable passes through a gap between the two measuring wheels, the gap between the two measuring wheels can be changed through the expansion and contraction of the contraction springs 15, so that the measuring wheels 132 can measure the circuit cables with various sizes; meanwhile, under the action of the contraction spring 15, the outer end of the measuring wheel 132 is always clung to the cable, the cable is ensured not to be clamped, and the movement of the cable can drive the measuring wheel 132 to rotate.
The measuring wheel structure 13 comprises a supporting frame 131, a measuring wheel 132 and an encoder 133, wherein the supporting frame 131 is provided with a connecting hole 138, and is fixedly arranged with the supporting frame 14 through the connecting hole 138; the measuring wheel 132 is arranged below the supporting frame 131, a connecting shaft 134 is fixedly arranged in the center of the measuring wheel 131, the top end of the connecting shaft 134 penetrates through the supporting frame 131 from bottom to top, a ball bearing 135 is arranged between the connecting shaft 134 and the supporting frame 131, a positioning baffle 1341 is arranged on the connecting shaft 134, the positioning baffle 1341 is pressed on the ball bearing 135, and the positioning baffle 1341 plays a role in supporting and limiting the measuring wheel 132. A mud guard 136 is arranged outside the measuring wheel 132; the model of the encoder is BEI H37C-SS-645/983-ABC-5V/V-KP14-S. The encoder 133 is disposed above the supporting frame 131, and the rotating shaft of the encoder 133 is connected with the top end of the connecting shaft 131 through a coupling 137; the measuring wheel 132 rotates, thereby driving the rotation shaft of the encoder 133 to rotate. The ball bearings 135 are provided to position the connecting shaft 134 so that the connecting shaft 134 can be rotatably provided around the axis thereof; in this way, when torque is transmitted to the encoder 133 through the coupling 137, the rotation of the rotating shaft of the encoder 133 is more stable, so that the measurement of the encoder 133 is ensured.
The front end and the rear end of the upper measuring structure 1 are respectively provided with a horizontal guiding wheel set 12, the middle of the horizontal guiding wheel set 12 is provided with a guiding through groove 121, and a cable sequentially passes through the guiding through groove 121 and a limiting section along the linear direction and is clamped in a gap between two measuring wheels. The horizontal guiding wheel set 12 plays a role in preventing the cable from deflecting left and right, and a limiting interval is formed between the upper vertical limiting wheel 11 and the lower vertical limiting wheel 21 in vertical arrangement, so that the cable can be prevented from jumping up and down. The horizontal guide wheel set 12 consists of two rollers which are horizontally arranged in a rolling way, and the outer end surfaces of the rollers are in contact rolling way; the outer end surface of the roller is concavely provided with a guide through groove 121, and the guide through groove 121 is matched with the outer diameter of the cable.
A logging cable depth measuring device and a using method of the cable measuring device are provided, wherein the using method comprises the following steps: the measuring wheel 132 is driven to roll by the cable, the depth of the cable is equal to the thread rotated by the outer end surface of the measuring wheel 132, so that the depth of the cable can be measured by calculating the thread rotated by the outer end surface of the measuring wheel 132; the method comprises the following specific steps: step 1, enabling a cable to enter a measuring device; pulling out the quick pin 3 between the upper measuring structure 1 and the lower clamping structure 2, separating the upper measuring structure 1 from the lower clamping structure 2, opening a limiting interval formed between the upper vertical limiting wheel 11 and the lower vertical limiting wheel 21, and enabling a cable to pass through the guide through groove 121 of the horizontal guide wheel set 12 of the wire inlet end of the measuring device and be inserted into the limiting interval; step 2, the outer end surface of the measuring wheel 132 is fixedly arranged with the cable in an extrusion mode; the pressing handle is pulled backwards, so that the two measuring wheels 132 are far away from each other under the drive of the supporting frame 131, and a cable penetrates through a gap between the two measuring wheels 132; the pressing handle is pulled forwards, the two measuring wheels 132 are mutually pressed under the action of the contraction spring 15, and the cable is pressed in the gap between the two measuring wheels 132; meanwhile, the measuring wheel 132 is arranged right below the rotating hole of the supporting frame 131, a connecting shaft 134 is fixedly arranged in the center of the measuring wheel 131, the top end of the connecting shaft 134 is arranged in the rotating hole of the supporting frame 131 from bottom to top, and the measuring wheel 132 is rotatably arranged below the supporting frame 131; thus, when the cable moves, the cable drives the measuring wheel 132 to rotate; step 3, after the cable reaches the target depth, measuring the number of turns of the wheel 132; a ball bearing 135 is arranged in the rotation hole of the supporting frame 131, and the upper end part of the connecting shaft 134 is sleeved on the ball bearing 135; a positioning baffle 1341 is arranged on the connecting shaft 134, the positioning baffle 1341 is pressed against the ball bearing 135, an encoder 133 is arranged above the supporting frame 131, the encoder 133 is arranged above the supporting frame 131, and the rotating shaft of the encoder 133 is connected with the top end of the connecting shaft 131 through a coupling 137; the measuring wheel 132 rotates, so that the rotating shaft of the encoder 133 is driven to rotate; the encoder 133 is coaxially connected with the measuring wheel 132, so that the number of turns measured on the encoder 133 is the number of turns of the measuring wheel 132; step 4, calculating the length of the cable through the measuring wheel 132; the length of the cable is obtained by multiplying the circumference of the outer end surface of the measuring wheel 132 by the number of turns of the measuring wheel 132.
The foregoing is only a preferred embodiment of the invention, it being noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the present invention, and such modifications and adaptations are intended to be comprehended within the scope of the invention.
Claims (1)
1. The utility model provides a logging cable degree of depth measuring device which characterized in that: the device comprises an upper measuring structure (1) and a lower clamping structure (2), wherein the upper measuring structure (1) is hinged with one end of the lower clamping structure (2), and the other ends of the upper measuring structure (1) and the lower clamping structure (2) are connected through a quick pin (3); the front end and the rear end of the upper measuring structure (1) are respectively provided with an upper vertical limiting wheel (11), the lower clamping structure (2) is provided with a lower vertical limiting wheel (21) matched with the upper vertical limiting wheel (11), and a limiting interval is formed between the upper vertical limiting wheel (11) and the lower vertical limiting wheel (21); by pulling out the quick pin, the lower clamping structure (2) rotates downwards around the hinge part of the lower clamping structure, and the limiting interval is opened; the upper measuring structure (1) comprises a frame (10), a measuring wheel structure (13) is horizontally arranged below the frame (10), a supporting frame (14) is arranged on the measuring wheel structure (13), the supporting frame (14) is arranged on the side of the frame (10), and the measuring wheel structure (13) horizontally rotates around the hinge position of the measuring wheel structure; the two measuring wheel structures (13) are provided with contraction springs (15), the straight line where the contraction springs (15) are located is connected and overlapped with the centers of the two measuring wheel structures (13), and the two measuring wheel structures (13) are tensioned towards the centers through the contraction springs (15);
the measuring wheel structure (13) comprises a supporting frame (14) and a measuring wheel (132), wherein a connecting hole (138) is formed in the side end of the supporting frame (14), and the connecting hole (138) is fixedly arranged with one end of the supporting frame (14); one end of the support frame (14) far away from the connecting hole (138) is provided with a rotating hole, the measuring wheel (132) is arranged right below the rotating hole of the support frame (14), the center of the measuring wheel (132) is fixedly provided with a connecting shaft (134), the top end of the connecting shaft (134) is arranged in the rotating hole of the support frame (14) from bottom to top, and the measuring wheel (132) is arranged below the support frame (14) in a rotating way;
a ball bearing (135) is arranged in the rotating hole of the supporting frame (14), and the upper end part of the connecting shaft (134) is sleeved on the ball bearing (135); a positioning baffle (1341) is arranged on the connecting shaft (134), and the positioning baffle (1341) is propped against the ball bearing (135); a mud guard (136) is arranged outside the measuring wheel (132);
the measuring wheel structure (13) comprises an encoder (133), the encoder (133) is arranged above the supporting frame (14), and the rotating shaft of the encoder (133) is connected with the top end of the connecting shaft (134) through a coupler (137); the measuring wheel (132) rotates, so that the rotating shaft of the encoder (133) is driven to rotate;
the front end and the rear end of the upper measuring structure (1) are respectively provided with a horizontal guide wheel set (12), the middle of the horizontal guide wheel set (12) is provided with a guide through groove (121), and a cable sequentially passes through the guide through groove (121) and a limiting section along a linear direction and is clamped in a gap between two measuring wheels (132);
the horizontal guide wheel set (12) consists of two rollers which are horizontally arranged in a rolling way, and the outer end surfaces of the rollers are in contact rolling way; the outer end surface of the roller is concavely provided with a guide through groove (121), and the guide through groove (121) is matched with the outer diameter of a cable;
the using method of the measuring device comprises the following steps:
the cable drives the measuring wheel (132) to roll, the depth of the cable is equal to the thread rotated by the outer end surface of the measuring wheel (132), so that the depth of the cable can be measured by calculating the thread rotated by the outer end surface of the measuring wheel (132); the method comprises the following specific steps:
step 1, enabling a cable to enter a measuring device; pulling out a quick pin (3) between the upper measuring structure (1) and the lower clamping structure (2), separating the upper measuring structure (1) from the lower clamping structure (2), forming a limiting interval between an upper vertical limiting wheel (11) and a lower vertical limiting wheel (21), and enabling a cable to pass through a guide through groove (121) of a horizontal guide wheel set (12) at the inlet end of the measuring device and to be inserted into the limiting interval;
step 2, the outer end surface of the measuring wheel (132) is fixedly arranged with the cable in an extrusion mode; the pressing handle is pulled backwards, so that the two measuring wheels (132) are far away from each other under the drive of the supporting frame (14), and a cable penetrates through a gap between the two measuring wheels (132); the pressing handle is pulled forwards, the two measuring wheels (132) are mutually pressed under the action of the contraction spring (15), and the cable is pressed in a gap between the two measuring wheels (132); meanwhile, the measuring wheel (132) is arranged right below a rotating hole of the supporting frame (14), a connecting shaft (134) is fixedly arranged at the center of the measuring wheel (132), the top end of the connecting shaft (134) is arranged in the rotating hole of the supporting frame (14) from bottom to top, and the measuring wheel (132) is rotatably arranged below the supporting frame (14); when the cable moves, the cable drives the measuring wheel (132) to rotate;
step 3, after the cable reaches the target depth, measuring the number of turns of the wheel (132); a ball bearing (135) is arranged in the rotating hole of the supporting frame (14), and the upper end part of the connecting shaft (134) is sleeved on the ball bearing (135); a positioning baffle (1341) is arranged on the connecting shaft (134), the positioning baffle (1341) is propped against the ball bearing (135), an encoder (133) is arranged above the supporting frame (14), the encoder (133) is arranged above the supporting frame (14), and the rotating shaft of the encoder (133) is connected with the top end of the connecting shaft (134) through a coupler (137); the measuring wheel (132) rotates, so that the rotating shaft of the encoder (133) is driven to rotate; the encoder (133) is coaxially connected with the measuring wheel (132), so that the number of turns measured on the encoder (133) is the number of turns of the measuring wheel (132);
step 4, calculating the length of the cable through a measuring wheel (132); the length of the cable is obtained by multiplying the circumference of the outer end surface of the measuring wheel (132) by the number of turns of the measuring wheel (132).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910898900.5A CN110541701B (en) | 2019-09-23 | 2019-09-23 | Logging cable depth measuring device and using method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910898900.5A CN110541701B (en) | 2019-09-23 | 2019-09-23 | Logging cable depth measuring device and using method thereof |
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| Publication Number | Publication Date |
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| CN110541701A CN110541701A (en) | 2019-12-06 |
| CN110541701B true CN110541701B (en) | 2023-08-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910898900.5A Active CN110541701B (en) | 2019-09-23 | 2019-09-23 | Logging cable depth measuring device and using method thereof |
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| CN110541701A (en) | 2019-12-06 |
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