CN110130880B - Underground magnetic marker positioning and pointing tool - Google Patents
Underground magnetic marker positioning and pointing tool Download PDFInfo
- Publication number
- CN110130880B CN110130880B CN201910400236.7A CN201910400236A CN110130880B CN 110130880 B CN110130880 B CN 110130880B CN 201910400236 A CN201910400236 A CN 201910400236A CN 110130880 B CN110130880 B CN 110130880B
- Authority
- CN
- China
- Prior art keywords
- speed motor
- low
- central column
- shaft
- output shaft
- 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
- 239000003550 marker Substances 0.000 title claims abstract description 25
- 230000005484 gravity Effects 0.000 claims abstract description 18
- 230000007246 mechanism Effects 0.000 claims description 5
- 239000013307 optical fiber Substances 0.000 abstract description 17
- 238000000034 method Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000005096 rolling process Methods 0.000 description 3
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
Images
Classifications
-
- 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
- E21B47/09—Locating or determining the position of objects in boreholes or wells, e.g. the position of an extending arm; Identifying the free or blocked portions of pipes
- E21B47/092—Locating or determining the position of objects in boreholes or wells, e.g. the position of an extending arm; Identifying the free or blocked portions of pipes by detecting magnetic anomalies
Landscapes
- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Geophysics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geophysics And Detection Of Objects (AREA)
Abstract
The invention discloses a positioning and pointing tool for an underground magnetic marker, which comprises a supporting part, wherein a gravity eccentric component is arranged on the supporting part, and a target searching component is arranged on the gravity eccentric component; the target searching component comprises a low-speed motor, an output shaft of the low-speed motor is horizontally arranged, and an output shaft of the low-speed motor is fixedly connected with a pointing magnetic needle. By adopting the underground magnetic marker positioning and pointing tool, the position of the underground magnetic marker can be accurately marked, so that the position of the marked optical fiber on the casing can be obtained, and an operator can divide a dangerous area by taking the marked position as a reference to avoid the dangerous area for perforating.
Description
Technical Field
The invention relates to a logging tool, in particular to a downhole magnetic marker positioning and pointing tool.
Background
In the development process of an oil field, detailed information of the characteristics and the state of the fluid in the well needs to be known, and the optical fiber logging has the advantages of insensitivity to electromagnetic interference and capability of bearing extreme conditions; the method can continuously measure along the shaft in the whole production period, realize the permanent monitoring of the oil and gas well, and provide detailed, comprehensive and accurate underground production data for producers.
In the process of arranging the downhole sensor and the optical fiber, the optical fiber is usually fixed along the length direction of the casing, and an optical fiber fixing device is arranged on the outer wall of the casing at a distance in each axial direction for fixing the optical fiber on the outer wall of the casing and then enabling the optical fiber to be downhole along with the lower part of the casing. However, the casing which is lowered in a long distance is irregularly twisted, so that the actual trend and position of the optical fiber in the borehole are inconsistent with the preset condition, the operation of the optical fiber position cannot be accurately avoided during subsequent perforation, and the risk that the optical fiber is cut off exists.
Disclosure of Invention
In order to solve the technical problems, the invention provides a downhole magnetic marker positioning and pointing tool which can accurately position a magnetic marker for fixing an optical fiber so as to mark the position of the optical fiber.
The technical scheme is as follows:
a magnetic marker location pointing tool in the pit, its key lies in: the gravity eccentric component is arranged on the gravity eccentric component;
the target searching component comprises a low-speed motor, an output shaft of the low-speed motor is horizontally arranged, and an output shaft of the low-speed motor is fixedly connected with a pointing magnetic needle.
By adopting the technical scheme, the low-speed motor drives the pointing magnetic needle to continuously rotate, when the pointing magnetic needle approaches to the magnetic marker, the magnetic needle is attracted by the magnetic marker, when the attraction of the magnetic marker to the pointing magnetic needle is large enough, the pointing magnetic needle stops rotating and is fixed in the direction, and the direction of the magnetic needle at the moment is recorded, namely the position of the magnetic marker on the sleeve;
the orientation of the magnetic needle may register the mark as follows: the reference position (for example, vertical direction) of the magnetic needle is set and recorded, and when the magnetic needle is attracted to be fixed, the rotation angle of the magnetic needle relative to the reference position is recorded, so that the orientation of the magnetic needle can be estimated. The gravity eccentric assembly can always keep the same (vertical) reference position pointing to the magnetic needle, and the condition of inaccurate angle measurement caused by the change of the reference position is avoided.
Gravity eccentric subassembly includes the hoist and mount axle, should hoist and mount axle horizontal installation on the supporting part, this hoist and mount axle below is equipped with eccentric weight plate, this eccentric weight plate hang in hoist and mount are epaxial, low-speed motor locates the upper surface of eccentric weight plate, the output shaft of low-speed motor hoist and mount axle and eccentric weight plate is parallel to each other.
Two lifting lugs are fixed on the upper surface of the eccentric weight plate and distributed along the length direction of the hoisting shaft, and the two lifting lugs are respectively installed on the hoisting shaft through bearings.
An angle sensor is arranged on an output shaft of the low-speed motor, and the output shaft of the low-speed motor is perpendicular to the pointing magnetic needle.
The supporting part comprises a supporting sleeve, the supporting sleeve is horizontally arranged, the gravity eccentric assembly is located inside the supporting sleeve, the output shaft of the low-speed motor extends out of the end face of one end of the supporting sleeve, and the pointing magnetic needle is located on the outer side of the supporting sleeve.
The output shaft of the low-speed motor is sleeved with a supporting plate, the output shaft of the low-speed motor movably penetrates through the supporting plate, and the supporting plate is fixed on the eccentric weight plate.
The supporting sleeve is internally and fixedly embedded with a central column, the central column and the supporting sleeve are coaxially arranged, the central column is far away from the directional magnetic needle, an oil pipe connector is arranged on the end face, back to the directional magnetic needle, of the central column, and the hoisting shaft is inserted into the central column.
An inserting hole penetrates through the central column along the direction of the cylinder center line of the supporting sleeve, the oil pipe joint is cylindrical, the oil pipe joint and the central column are coaxially arranged, the inserting hole penetrates through the oil pipe joint, a counter bore is arranged at one end, back to the central column, of the oil pipe joint, the counter bore surrounds the inserting hole, and the aperture of the counter bore is larger than that of the inserting hole;
one end of the hoisting shaft faces the pointing magnetic needle, a locking thread is arranged at the end part of the other end of the hoisting shaft, the threaded end of the hoisting shaft movably penetrates through the insertion hole and extends into the countersunk hole, and a locking nut is sleeved at the threaded end of the hoisting shaft and is positioned in the countersunk hole;
and a limiting lug is arranged in the middle of the hoisting shaft and is positioned between the central column and the pointing magnetic needle, and the limiting lug abuts against the end face of the central column.
And a traveling mechanism is arranged on the outer wall of the support sleeve.
Has the advantages that: by adopting the underground magnetic marker positioning and pointing tool, the position of the underground magnetic marker can be accurately marked, so that the position of the marked optical fiber on the casing can be obtained, and an operator can divide a dangerous area by taking the marked position as a reference to avoid the dangerous area for perforating.
Drawings
FIG. 1 is a schematic view of the structure of the present invention;
FIG. 2 is a schematic view of the present invention in use;
FIG. 3 is a schematic cross-sectional view of the present invention;
FIG. 4 is a left side view of FIG. 1;
FIG. 5 is an enlarged view of the portion z of FIG. 4;
fig. 6 is a schematic structural view of the traveling mechanism 2;
FIG. 7 is a schematic view of the installation structure of the gravity eccentric assembly and the target searching assembly 3;
FIG. 8 is a view showing a state where the pointing magnetic needle 32 is located at a reference position;
fig. 9 is a schematic view showing a state where the pointing magnetic needle 32 is attracted by the magnetic marker.
Detailed Description
The invention is further illustrated by the following examples and figures.
As shown in fig. 1 to 7, a downhole magnetic marker positioning and pointing tool comprises a support part, a gravity eccentric assembly is arranged on the support part, and a target searching assembly 3 is arranged on the gravity eccentric assembly;
gravity eccentric subassembly is including hoist and mount axle 1b, and this hoist and mount axle 1b horizontal installation is in on the supporting part, this hoist and mount axle 1b below is equipped with eccentric weight plate 1c, this eccentric weight plate 1c hang in hoist and mount are epaxial 1b, eccentric weight plate 1c upper surface is fixed with two lugs 1d, two lug 1d is followed hoist and mount axle 1 b's length direction distributes, two lug 1d is installed respectively through the bearing on the hoist and mount axle 1 b.
The target searching component 3 comprises a low-speed motor 31, an output shaft of the low-speed motor 31 is horizontally arranged, an output shaft of the low-speed motor 31 is fixedly connected with a directional magnetic needle 32, the low-speed motor 31 is arranged on the upper surface of an eccentric weight plate 1c, an output shaft of the low-speed motor 31 is connected with a hoisting shaft 1b and the eccentric weight plate 1c in parallel, an angle sensor 33 is arranged on the output shaft of the low-speed motor 31, the output shaft of the low-speed motor 31 is perpendicular to the directional magnetic needle 32, a supporting disc 34 is sleeved on the output shaft of the low-speed motor 31, the output shaft of the low-speed motor 31 movably penetrates through the supporting disc 34, and the supporting disc 34 is fixed on the eccentric weight plate 1 c.
The supporting part comprises a supporting sleeve 1a, the supporting sleeve 1a is horizontally arranged, the gravity eccentric assembly is located inside the supporting sleeve 1a, an output shaft of the low-speed motor 31, the supporting sleeve 1a and the hoisting shaft 1b are coaxially arranged, the output shaft of the low-speed motor 31 extends out of the end face of one end of the supporting sleeve 1a, and the pointing magnetic needle 32 is located on the outer side of the supporting sleeve 1 a.
A central column 4a is fixedly embedded in the supporting sleeve 1a, the central column 4a and the supporting sleeve 1a are coaxially arranged, the central column 4a is far away from the directional magnetic needle 32, an oil pipe connector 4b is arranged on the end face, back to the directional magnetic needle 32, of the central column 4a, and the hoisting shaft 1b is inserted in the central column 4 a.
An inserting hole penetrates through the central column 4a along the direction of the cylinder center line of the supporting sleeve 1a, the oil pipe joint 4b is cylindrical, the oil pipe joint 4b and the central column 4a are coaxially arranged, the inserting hole penetrates through the oil pipe joint 4b, a counter bore is arranged at one end, facing away from the central column 4a, of the oil pipe joint 4b, the counter bore surrounds the inserting hole, and the aperture of the counter bore is larger than that of the inserting hole;
one end of the hoisting shaft 1b faces the pointing magnetic needle 32, a locking thread is arranged at the end part of the other end of the hoisting shaft 1b, the thread end of the hoisting shaft 1b movably penetrates through the insertion hole and extends into the countersunk hole, a locking nut 4c is sleeved at the thread end of the hoisting shaft 1b, and the locking nut 4c is positioned in the countersunk hole;
a limiting lug 4d is arranged in the middle of the hoisting shaft 1b, the limiting lug 4d is positioned between the central column 4a and the pointing magnetic needle 32, and the limiting lug 4d abuts against the end face of the central column 4 a.
The outer wall of the supporting sleeve 1a is provided with a travelling mechanism 2, the travelling mechanism 2 comprises at least three groups of rolling devices, and the rolling devices are annularly and uniformly distributed on the outer wall of the supporting sleeve 1 a;
the rolling device comprises two supporting legs 2a, two supporting legs 2a are along the center line direction of supporting sleeve 1a distributes, supporting leg 2a is along supporting sleeve 1 a's radial setting the outer wall of supporting sleeve 1a corresponds every supporting leg 2a is equipped with the articulated seat of supporting leg 1e respectively, the inner of supporting leg 2a with correspond the articulated seat of supporting leg 1e is articulated, gyro wheel 2b is installed to the outer end of supporting leg 2 a.
A hanging plate 2c is arranged between the two supporting legs 2a in the same group, the hanging plate 2c is fixed on the outer wall of the supporting sleeve 1a, the two supporting legs 2a are respectively connected with a spring 2d, one end of each spring 2d is hung on the corresponding supporting leg 2a, and the other end of each spring 2d is hung on the hanging plate 2 c.
The two legs 2a of the same group are respectively close to two ends of the supporting sleeve 1a, wherein the leg 2a close to the pointing magnetic needle 32 is a driving leg, and the leg 2a far away from the pointing magnetic needle 32 is a driven leg;
the inner end of each driving support leg is provided with a driving shaft 2e, the inner end of each driving support leg is arranged on the corresponding driving shaft 2e through a bearing, the driving shaft 2e is arranged on the corresponding support leg hinge seat 1e through a bearing, a driving belt pulley 2f is fixedly sleeved on the driving shaft 2e, a roller 2b is fixedly sleeved on a roller shaft 2g, the roller shaft 2g is arranged at the outer end of the corresponding support leg 2a through a bearing, a driven belt pulley 2h is fixedly sleeved on the roller shaft 2g, and the same transmission belt 2j is sleeved on the driving belt pulley 2f and the corresponding driven belt pulley 2 h; a universal coupling 2k is connected between any two circumferentially adjacent driving shafts 2 e;
a transmission worm wheel 2m is fixedly sleeved on any one driving shaft 2e, a walking motor 2n is fixed on the outer wall of the supporting sleeve 1a, an output shaft of the walking motor 2n is connected with a driving worm 2p, and the driving worm 2p is meshed with the transmission worm wheel 2 m.
Fig. 8 and 9 show the schematic of the invention in use, the device of the invention is placed in a sleeve to move with the vertical direction of the pointing magnetic needle 32 as a reference position, the outer wall of the sleeve is provided with a magnetic marker x, the N pole of the magnetic marker x faces inwards in the radial direction, the gravity eccentric component is always positioned below the hoisting shaft 1b under the action of gravity, thereby ensuring that the reference position of the pointing magnetic needle 32 is always kept vertically unchanged in the advancing process, the low-speed motor 31 drives the pointing magnetic needle 32 to rotate at a low speed, in proximity to the magnetic marker x, the N pole of the magnetic marker x attracts the S pole of the pointing magnet 32, when the attraction of magnetic marker x to pointing magnet 32 is large enough, pointing magnet 32 stops rotating and remains stable, the rotation angle alpha of the pointing magnetic needle 32 relative to the reference position can be measured through the angle sensor 33, so that the specific position of the magnetic marker x on the sleeve is marked;
when a plurality of magnetic markers x are arranged along the length direction of the optical fiber, the position of each magnetic marker x is respectively measured, so that the approximate trend of the optical fiber can be obtained, the twisting condition of the sleeve and the optical fiber can be mastered, the reference can be provided for the subsequent perforation operation, and the optical fiber can be avoided as much as possible.
Finally, it should be noted that the above-mentioned description is only a preferred embodiment of the present invention, and that those skilled in the art can make various similar representations without departing from the spirit and scope of the present invention.
Claims (1)
1. A downhole magnetic marker locating and pointing tool, characterized by: comprises a supporting part, wherein a gravity eccentric component is arranged on the supporting part, and a target searching component (3) is arranged on the gravity eccentric component;
the target searching component (3) comprises a low-speed motor (31), an output shaft of the low-speed motor (31) is horizontally arranged, and a pointing magnetic needle (32) is fixedly connected to the output shaft of the low-speed motor (31);
the gravity eccentric assembly comprises a hoisting shaft (1 b), the hoisting shaft (1 b) is horizontally arranged on the supporting part, an eccentric weight plate (1 c) is arranged below the hoisting shaft (1 b), the eccentric weight plate (1 c) is suspended on the hoisting shaft (1 b), the low-speed motor (31) is arranged on the upper surface of the eccentric weight plate (1 c), and an output shaft of the low-speed motor (31), the hoisting shaft (1 b) and the eccentric weight plate (1 c) are parallel to each other;
two lifting lugs (1 d) are fixed on the upper surface of the eccentric weight plate (1 c), the two lifting lugs (1 d) are distributed along the length direction of the hoisting shaft (1 b), and the two lifting lugs (1 d) are respectively installed on the hoisting shaft (1 b) through bearings;
an angle sensor (33) is arranged on an output shaft of the low-speed motor (31), and the output shaft of the low-speed motor (31) is perpendicular to the pointing magnetic needle (32);
the supporting part comprises a supporting sleeve (1 a), the supporting sleeve (1 a) is horizontally arranged, the gravity eccentric component is positioned in the supporting sleeve (1 a), an output shaft of the low-speed motor (31), the supporting sleeve (1 a) and the hoisting shaft (1 b) are coaxially arranged, the output shaft of the low-speed motor (31) extends out of the end face of one end of the supporting sleeve (1 a), and the pointing magnetic needle (32) is positioned outside the supporting sleeve (1 a);
a support plate (34) is sleeved on an output shaft of the low-speed motor (31), the output shaft of the low-speed motor (31) movably penetrates through the support plate (34), and the support plate (34) is fixed on the eccentric weight plate (1 c);
a central column (4 a) is fixedly embedded in the supporting sleeve (1 a), the central column (4 a) and the supporting sleeve (1 a) are coaxially arranged, the central column (4 a) is far away from the pointing magnetic needle (32), an oil pipe joint (4 b) is arranged on the end face, back to the pointing magnetic needle (32), of the central column (4 a), and the hoisting shaft (1 b) is inserted into the central column (4 a);
a plug hole penetrates through the central column (4 a) along the direction of the cylinder center line of the supporting sleeve (1 a), the oil pipe joint (4 b) is cylindrical, the oil pipe joint (4 b) and the central column (4 a) are coaxially arranged, the plug hole penetrates through the oil pipe joint (4 b), a counter bore is arranged at one end, facing away from the central column (4 a), of the oil pipe joint (4 b), the counter bore surrounds the plug hole, and the aperture of the counter bore is larger than that of the plug hole;
one end of the hoisting shaft (1 b) faces the pointing magnetic needle (32), a locking thread is arranged at the end part of the other end of the hoisting shaft (1 b), the thread end of the hoisting shaft (1 b) movably penetrates through the inserting hole and extends into the countersunk hole, a locking nut (4 c) is sleeved at the thread end of the hoisting shaft (1 b), and the locking nut (4 c) is located in the countersunk hole;
a limiting lug (4 d) is arranged in the middle of the hoisting shaft (1 b), the limiting lug (4 d) is positioned between the central column (4 a) and the pointing magnetic needle (32), and the limiting lug (4 d) abuts against the end face of the central column (4 a);
and a traveling mechanism (2) is arranged on the outer wall of the supporting sleeve (1 a).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910400236.7A CN110130880B (en) | 2019-05-13 | 2019-05-13 | Underground magnetic marker positioning and pointing tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910400236.7A CN110130880B (en) | 2019-05-13 | 2019-05-13 | Underground magnetic marker positioning and pointing tool |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110130880A CN110130880A (en) | 2019-08-16 |
| CN110130880B true CN110130880B (en) | 2022-09-23 |
Family
ID=67573919
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910400236.7A Active CN110130880B (en) | 2019-05-13 | 2019-05-13 | Underground magnetic marker positioning and pointing tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110130880B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101929310A (en) * | 2010-07-21 | 2010-12-29 | 北京航空航天大学 | Active alternating magnetic field information-based method for guiding and positioning well drilling track |
| WO2013185225A1 (en) * | 2012-06-11 | 2013-12-19 | Kobold Services Inc. | Microseismic monitoring with fiber-optic noise mapping |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101509370A (en) * | 2009-03-24 | 2009-08-19 | 北京环鼎科技有限责任公司 | Digital casing joint magnetic positioning logging tool |
| US9181796B2 (en) * | 2011-01-21 | 2015-11-10 | Schlumberger Technology Corporation | Downhole sand control apparatus and method with tool position sensor |
| US9127532B2 (en) * | 2011-09-07 | 2015-09-08 | Halliburton Energy Services, Inc. | Optical casing collar locator systems and methods |
| CN102852515B (en) * | 2012-09-08 | 2014-12-31 | 中国石油化工股份有限公司 | Fracture eccentric locating detector for mechanical horizontal well casing |
| US9217320B2 (en) * | 2013-02-26 | 2015-12-22 | Schlumberger Technology Corporation | Magnetically clamping a downhole component to a direction of a borehole casing |
| WO2016032517A1 (en) * | 2014-08-29 | 2016-03-03 | Schlumberger Canada Limited | Fiber optic magneto-responsive sensor assembly |
| BR112017021814B1 (en) * | 2015-05-15 | 2022-06-28 | Halliburton Energy Services, Inc. | SYSTEM AND METHOD TO COMPLETE A WELL HOLE |
| CN106285579B (en) * | 2016-11-20 | 2018-12-18 | 东北石油大学 | A kind of pressure locking-type perforation orienting device for horizontal well |
| CN207393189U (en) * | 2017-10-19 | 2018-05-22 | 北京雄跃厚明科技有限公司 | A kind of magnetic orientation well-logging probe |
| CN208168864U (en) * | 2018-04-16 | 2018-11-30 | 新疆工程学院 | Passive magnetic locator working principle and analysis of Influential Factors experimental provision |
-
2019
- 2019-05-13 CN CN201910400236.7A patent/CN110130880B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101929310A (en) * | 2010-07-21 | 2010-12-29 | 北京航空航天大学 | Active alternating magnetic field information-based method for guiding and positioning well drilling track |
| WO2013185225A1 (en) * | 2012-06-11 | 2013-12-19 | Kobold Services Inc. | Microseismic monitoring with fiber-optic noise mapping |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110130880A (en) | 2019-08-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110094197B (en) | Method for preventing damage of optical cable perforation of horizontal well pipe column | |
| US2719363A (en) | Calipering method and apparatus | |
| US5458208A (en) | Directional drilling using a rotating slide sub | |
| CN102852512B (en) | Device and method for monitoring stick-slip vibration of drill bit based on measurement while drilling | |
| CN110736498A (en) | sliding body deep hole outside multi-parameter monitoring system and monitoring method | |
| BR112013018519B1 (en) | METHOD FOR MONITORING A POSITION OF A SERVICE TOOL IN A WELL HOLE, AND WELLBOARD TOOL ASSEMBLY | |
| US20160273348A1 (en) | Downhole position sensor | |
| US3670566A (en) | Apparatus for attaching a tool to a conduit in a borehole | |
| US3686943A (en) | Measuring apparatus for attaching to a conduit in a borehole | |
| US10370899B2 (en) | Mud saver valve measurement system and method | |
| CN110130880B (en) | Underground magnetic marker positioning and pointing tool | |
| CN110080750B (en) | Walking mechanism of underground magnetic marker positioning device | |
| CN102037206B (en) | Top drive apparatus | |
| CN110005404B (en) | Horizontal well underground magnetic marker positioning device | |
| CN1712668A (en) | Magnetic detector of perforation evelet quality for oil well casing pipe | |
| CN210105750U (en) | Underground nonmetal pipeline is surveyed and is used ground boring device | |
| CN111502637A (en) | Liquid level positioning device for oil and gas exploration | |
| US3690163A (en) | Free point indicator downhole tool with automatic centralizer | |
| CN207296904U (en) | Logging instrument is with brill centralizer | |
| US2719362A (en) | Method and apparatus for calipering | |
| CN211623364U (en) | Guiding mechanism of rotary drilling rig for ultra-long piles in soft soil area | |
| AU2014370370A1 (en) | Top drive movement measurement system and method | |
| CN210152638U (en) | Gravity type drilling core hole inclinometer | |
| JP3054195B2 (en) | Bowling mast swivel mobile measuring device | |
| CN204851095U (en) | Piping tool cluster hinders instrument with antifriction in succession |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |