CN110805431B - Fish top position measuring method - Google Patents
Fish top position measuring method Download PDFInfo
- Publication number
- CN110805431B CN110805431B CN201911116464.8A CN201911116464A CN110805431B CN 110805431 B CN110805431 B CN 110805431B CN 201911116464 A CN201911116464 A CN 201911116464A CN 110805431 B CN110805431 B CN 110805431B
- Authority
- CN
- China
- Prior art keywords
- positioning device
- drill rod
- fish
- eccentric
- magnetic positioning
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Abstract
The invention provides a fish top position measuring method, which comprises the steps of installing an eccentric magnetic positioning device at the lower end of a drill rod, and lowering the eccentric magnetic positioning device to a position below a fish top; lifting the drill rod, lifting the position of the eccentric magnetic positioning device above the fish top, and measuring the position of the fish top by the eccentric magnetic positioning device through detecting the change of a magnetic field; rotating the drill rod by a certain angle, lowering the drill rod to enable the position of the eccentric magnetic positioning device to descend below the fish top, and simultaneously measuring the position of the fish top by the eccentric magnetic positioning device through detecting the change of a magnetic field; rotating the drill rod for a certain angle again, and repeating the measurement operations of lifting and lowering the drill rod until the drill rod rotates for a circle; comparing the height position of the fish top measured in the process of lifting or lowering the drill rod; and comparing each angle to measure the position of the fish top direction. The invention can also determine the depth of the fish top and the position of the fish top relative to the well hole when the fish top is far away from the well mouth.
Description
Technical Field
The invention relates to a fish top position measuring method, which is used for measuring the depth of a fish top and the direction relative to a borehole when a drilling tool falls into the well.
Background
In the process of oil exploration and development, accidents of drilling tool falling into a well often occur. When the well is treated, the well needs to be drilled along the original borehole track, the fish top is tried to be drilled, and then treatment measures such as fishing and the like are taken. However, due to errors in trajectory control, the drill bit often rubs against the top of the fish. It is now necessary to measure the depth of the fish head and the orientation relative to the borehole in the newly drilled borehole. The most effective method of measuring the fish roof is magnetic positioning logging. However, magnetic positioning instruments cannot measure the fish-top and the orientation relative to the borehole, and cannot measure the depth of the fish-top when the instrument is further from the fish-top.
Disclosure of Invention
Aiming at the technical problems in the prior art, the invention provides a fish top position measuring method, which can determine the depth of a fish top and the position of the fish top relative to a well hole when the fish top is far away from a well mouth.
In order to achieve the above object, the present invention provides a method for measuring a position of a fish top, comprising:
installing an eccentric magnetic positioning device at the lower end of the drill rod, and lowering the eccentric magnetic positioning device to a position below the fish top;
lifting the drill rod, lifting the position of the eccentric magnetic positioning device above the fish top, and measuring the position of the fish top by the eccentric magnetic positioning device through detecting the change of a magnetic field; rotating the drill rod by a certain angle, lowering the drill rod to enable the position of the eccentric magnetic positioning device to descend below the fish top, and simultaneously measuring the position of the fish top by the eccentric magnetic positioning device through detecting the change of a magnetic field;
rotating the drill rod for a certain angle again to repeat the measurement operations of lifting and lowering the drill rod until the drill rod rotates for a circle;
comparing data of the position of the fish top measured in the process of lifting or lowering the drill rod, and judging the height position of the fish top; and comparing the data of the position of the fish top measured at each angle, and judging the direction position of the fish top.
The invention is further improved in that when the eccentric magnetic positioning device is assembled, the bent drill rod is fixed at the bottom of the drill rod, and the positioning device is arranged in the bending direction of the bent drill rod;
then, the eccentric magnetic positioning device is installed at the bottom of the bent drill rod, a magnetic positioning instrument is eccentrically arranged in the eccentric magnetic positioning device, and the eccentric direction of the magnetic positioning instrument is consistent with the direction of the positioning device.
The invention has the further improvement that when the eccentric magnetic positioning device is assembled, a plurality of connecting rods are fixed at the edge of the base; and connecting the upper end of the connecting rod with an upper connector, wherein the upper part of the upper connector is detachably connected with the bent drill rod.
The invention is further improved in that a plurality of instrument connectors are uniformly arranged on the edge of a base of the eccentric positioning device, the instrument connectors are arranged around the center of the base in a circle, and the magnetic positioning instrument is arranged on one of the instrument connectors.
The invention is further improved in that the bent drill rod is connected with the upper joint through threads; when the bent drill rod is connected with the upper joint, the eccentric magnetic positioning device is rotated, so that the eccentric direction of a magnetic positioning instrument on the eccentric magnetic positioning device is kept consistent with the direction of the positioning device under the condition that the bent drill rod is stably connected with the upper joint.
A further development of the invention provides that, when the angle rod and the top sub are in the tightened state, if the direction of eccentricity of the magnetic locator cannot be matched to the direction of the positioning device, the magnetic locator is installed and replaced on the instrument sub in the direction of the positioning device.
The invention is further improved in that the positioning device comprises a positioning key arranged on the side wall of the bent drill rod in the bending direction and a gyroscope for detecting the direction of the positioning key; the gyroscope is placed underground along with the drilling tool, and the direction of the positioning key is detected underground when the position of the top of the fish is measured.
The drill rod is further improved in that after the drill rod is lifted up or lowered down, the rotation angle is 10-30 degrees.
The invention is further improved in that the number of the connecting rods and the instrument joints is the same, and the connecting rods and the instrument joints are arranged at intervals.
The invention is further improved in that the connecting rod is made of stainless steel or aluminum alloy.
Compared with the prior art, the invention has the advantages that:
according to the fish top position measuring method, when the fish top is far away from a wellhead, the depth of the fish top and the position of the fish top relative to a well hole can be determined. The bent drill rod provides a certain eccentric distance, the bent drill rod is matched with an eccentric magnetic positioning device to form a certain eccentric distance, and data in different eccentric directions are measured by rotating the drill rod when the bent drill rod is used, so that the direction of the fish top is judged. The height of the fish top can be measured by lifting the drill rod.
When the borehole is far from the fish roof, the fish roof signal may not be measured by the conventional magnetic positioning apparatus and method. However, by using the fish-top position measuring method of the present invention, it is possible to rotate the drill pipe to bring the magnetic positioning instrument close to the fish-top, thereby measuring the fish-top signal.
Drawings
Preferred embodiments of the present invention will be described in detail below with reference to the attached drawing figures, wherein:
FIG. 1 is a schematic structural view of a fish-top position measuring device according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of an eccentric magnetic positioning device according to an embodiment of the present invention;
FIG. 3 is a cross-sectional schematic view of an eccentric magnetic positioning apparatus according to an embodiment of the present invention;
in the drawings, like parts are provided with like reference numerals. The figures are not drawn to scale.
The meaning of the reference symbols in the drawings is as follows: 1. the device comprises a drill rod, 2, an eccentric magnetic positioning device, 3, a drilling tool, 4, a wellhead, 5, a casing, 11, a bent drill rod, 12, a positioning key, 21, an upper joint, 22, a base, 23, an instrument joint, 24, a magnetic positioning instrument, 25, a cable head, 26, a connecting rod, 31, a fish top, 41 and a well wall.
Detailed Description
In order to make the technical solutions and advantages of the present invention more apparent, exemplary embodiments of the present invention are described in further detail below with reference to the accompanying drawings. It is clear that the described embodiments are only a part of the embodiments of the invention, and not an exhaustive list of all embodiments. And the embodiments and features of the embodiments may be combined with each other without conflict.
According to the fish top position measuring method, when the fish top is far away from a wellhead, the depth of the fish top and the position of the fish top relative to a well hole can be determined.
Fig. 1 shows an embodiment of a fish-top position measuring device, and the fish-top position measuring method according to this embodiment uses the fish-top measuring device to measure the position of a fish top.
The fish-top position measuring device comprises a bent drill rod 11 and an eccentric magnetic positioning device 2. The drill pipe 1 extends from the wellhead 4 downhole and the bent drill pipe 11 is arranged downhole and connected to the bottom of the drill pipe 1. The drill rod 1 is a relatively straight rod body, the middle of the bent drill rod 11 is bent, the central shaft at the upper end of the bent drill rod 11 is overlapped with the central shaft of the drill rod 1, the central shaft at the lower end of the bent drill rod 11 is parallel to the central shaft of the drill rod 1, and a certain distance is reserved between the central shaft at the upper end of the bent drill rod 11 and the central shaft at the lower end of the bent drill rod 11 due to the fact that the bent part is arranged in the middle of the bent drill rod 11. In this embodiment, the eccentric magnetic positioning device 2 is attached to the bottom of the bent drill pipe 11. The eccentric magnetic positioning device 2 is a cylindrical structure, and the central axis of the eccentric magnetic positioning device coincides with the central axis of the bottom end of the bent drill rod 11 and is parallel to the central axis of the drill rod 1. The magnetic locator 24 is arranged in the eccentric magnetic positioning device 2, and the magnetic locator 24 is arranged at a position away from the central shaft of the eccentric magnetic positioning device 2 by a certain distance and is in an eccentric state. The eccentricity direction of the magnetic locator 24 is the same as the bending direction of the bent drill pipe 11, namely the direction of the central axis of the magnetic locator 24 relative to the central axis of the drill pipe 1 is consistent with the direction of the central axis of the magnetic locator 24 relative to the magnetic locator 24.
Magnetic attraction occurs between the magnetic locator 24 and the fish top 31, when the eccentric magnetic positioning device 2 moves along the axial direction along with the drill rod 1, the magnetic force between the magnetic locator 24 and the fish top 31 changes along with the position change, and the magnetic force is the largest when the distance between the magnetic locator 24 and the fish top 31 is the shortest.
According to the fish top position measuring device, the fish top position measuring method comprises the following steps:
and (3) installing an eccentric magnetic positioning device 2 at the lower end of the drill rod 1, and lowering the eccentric magnetic positioning device 2 to a position below the fish top.
And lifting the drill rod 1, lifting the position of the eccentric magnetic positioning device 2 to be above the fish top, and simultaneously measuring the position of the fish top by the eccentric magnetic positioning device 2 through detecting the change of the magnetic field. Rotating the drill rod 1 by a certain angle, lowering the drill rod 1 to enable the position of the eccentric magnetic positioning device 2 to descend below the fish top, and simultaneously measuring the position of the fish top by the eccentric magnetic positioning device 2 through detecting the change of a magnetic field.
And rotating the drill rod 1 again for a certain angle to repeat the measurement operation of lifting up the drill rod 1 and lowering down the drill rod 1, lifting up the drill rod 1, lifting the position of the eccentric magnetic positioning device 2 above the fish top, and simultaneously measuring the position of the fish top by detecting the change of the magnetic field through the eccentric magnetic positioning device 2. Rotating the drill rod 1 by a certain angle, lowering the drill rod 1 to enable the position of the eccentric magnetic positioning device 2 to descend below the fish top, and simultaneously measuring the position of the fish top by the eccentric magnetic positioning device 2 through detecting the change of a magnetic field.
The rotation of the drill rod 1 is repeated until the drill rod 1 rotates one revolution.
Comparing the data of the position of the fish top measured in the process of lifting or lowering the drill rod 1, and judging the height position of the fish top; and comparing the data of the position of the fish top measured at each angle, and judging the direction position of the fish top.
In one embodiment, the eccentric magnetic positioning device 2 is mounted by fixing the bent drill rod 11 to the bottom of the drill rod 1 and mounting the positioning device in the direction of bending of the bent drill rod 11. Then, the eccentric magnetic positioning device 2 is installed at the bottom of the bent drill rod 11, a magnetic positioning instrument 24 is eccentrically arranged in the eccentric magnetic positioning device 2, and the eccentric direction of the magnetic positioning instrument 24 is consistent with the direction of the positioning device.
When the method according to the embodiment is used, the central shaft of the drill rod 1 is spaced from the magnetic locator 24 by a relatively significant distance due to the eccentric arrangement of the curved drill rod 11 and the eccentric magnetic locator 24 by assembling the eccentric magnetic positioning device 2 to the curved drill rod 11. When the drilling rod 1 is rotated, the protruding positions of the magnetic positioning instruments 24 are different in different angles, after the re-measurement is finished, the measurement results of different angles are compared, and which group of magnetic positioning instruments 24 are closest to the position of the fish top when the measurement is carried out can be judged according to the size of the maximum magnetic force in each group, so that the direction of the fish top in the well is judged.
In one embodiment, as shown in fig. 2, the eccentric magnetic positioning device 2 comprises a base 22 and an upper joint 21, wherein the upper joint 21 is used for connecting the bent drill pipe 11, and the base 22 is used for fixing an instrument joint 23 and a magnetic positioning instrument 24. A plurality of connecting rods 26 are arranged between the base 22 and the upper joint 21, the upper ends of the connecting rods 26 are fixed below the upper joint 21, and the lower ends of the connecting rods 26 are fixed above the base 22. The upper joint 21 and the base 22 are both circular structures and are connected by a connecting rod 26 into a cylindrical structure with no side wall. Through the connection mode, the base 22 and the upper joint 21 are connected more stably, and the cylindrical structure is convenient for operations such as dismounting and mounting of the magnetic locator 24.
A plurality of instrument connectors 23 are arranged on the base 22, and the instrument connectors 23 are used for connecting a magnetic locator 24. In the present embodiment, the instrument connector 23 is provided in plural numbers, and is respectively provided on the eccentric magnetic positioning device for one round. The magnetic locator 24 can be selectively placed on any of the instrument connectors 23. After the eccentric magnetic positioning device 2 is connected with the bent drill rod 11, the instrument connector 23 at the corresponding position on the eccentric magnetic positioning device is determined and selected according to the position of the positioning device on the bent drill rod 11, and the eccentric direction of the magnetic positioning instrument 24 is ensured to be consistent with the direction of the positioning device.
The method of assembling the eccentric magnetic positioning device comprises the steps of first fixing a plurality of connecting rods 26 at the edge of the base 22; and connecting the upper end of the connecting rod 26 to an upper connector 21, wherein the upper part of the upper connector 21 is detachably connected with the bent drill rod 11.
In one embodiment, a plurality of instrument connectors 23 are uniformly arranged on the edge of a base 22 of the eccentric positioning device, the instrument connectors 23 are arranged around the center of the base 22 in a circle, and the magnetic positioning instrument 24 is installed on one of the instrument connectors 23. In this embodiment, the instrument connector 23 has a cylindrical structure, and the plurality of instrument connectors 23 are respectively disposed on the base 22 at positions close to the edges and are arranged around the base 22. As shown in fig. 3, the tie rods 26 and the instrument connector 23 are positioned and arranged around the edge of the base 22.
In this embodiment, the connecting rod 26 is made of stainless steel, aluminum alloy or other metal. A plurality of connecting rods 26 are respectively connected to the edge of the eccentric magnetic positioning device, and the cross section of each connecting rod 26 is inscribed in the edge of the base 22. The connecting rods 26 are uniformly arranged on the edge of the base 22, and the eccentric magnetic positioning device is constructed into an edge-supporting and hollow structure, so that the operations of butt joint, rotation and the like during connection of the bent drill rods 11 are facilitated, and the installation of the magnetic positioning instrument 24 is also facilitated.
In one embodiment, the bent drill pipe 11 and the upper joint 21 are connected by a thread. When the bent drill rod 11 and the upper joint 21 are connected, the eccentric magnetic positioning device 2 is rotated, and the eccentric direction of a magnetic positioning instrument 24 on the eccentric magnetic positioning device 2 is kept consistent with the direction of the positioning device under the condition that the bent drill rod 11 and the upper joint 21 are stably connected.
In a preferred embodiment, when the bent drill pipe 11 and the upper joint 21 are in a screwed state, if the eccentric direction of the magnetic locator 24 cannot be made to coincide with the direction of the positioning device, the magnetic locator 24 is installed and replaced on the tool joint 23 in the direction toward the positioning device.
When the method according to the present embodiment is used, the bent drill pipe 11 and the upper joint 21 may be connected by bolts. The edge of the bent drill rod 11 is provided with a connecting edge, the connecting edge is provided with a plurality of screw holes or through holes, the corresponding position of the edge of the upper joint 21 is also provided with screw holes or through holes, and bolts respectively penetrate through the connecting edge and the screw holes or through holes of the upper joint 21 to connect the upper joint 21 and the bent drill rod 11 together.
In one embodiment, the positioning means is oriented in the side wall of the drill rod 1 in a direction corresponding to the direction of bending of the bent drill rod 11, while also corresponding to the direction of eccentricity of the magnetic positioning means. The positioning device is capable of determining and recording the angular and positional state of the magnetic positioning device.
In a preferred embodiment, the positioning means comprise a positioning key 12, said positioning key 12 being used in cooperation with a gyroscope on the drilling tool 3. A gyro instrument is lowered into the drill tool 3 to measure the orientation of the navigation key 12 in the bent drill pipe 11. This direction is also the direction of the magnetic locator 24, i.e. the orientation of the fish head 31 relative to the borehole.
In the fish top position measuring device according to the present embodiment, the position of the positioning key 12 is detected by the gyroscope on the drilling tool 3, and the eccentric position of the magnetic locator 24 can be detected accordingly. And comparing the data in the plurality of groups of directions to determine the direction of the fish top 31.
In one embodiment, after the drill rod is lifted up or lowered down, the rotation angle is 10-30 degrees. Preferably 22.5 degrees, which is the angle of rotation 1/16. When the eccentric magnetic locator 24 is lowered below the fish top 31, the drilling tool is lifted up for logging, and meanwhile, a magnetic locating curve is recorded. Logging is stopped when the eccentric magnetic locator 24 reaches above the fish head. The tool 3 is rotated clockwise through an angle of, for example, 1/16 revolutions, and the tool is lowered for logging while the magnetic positioning curves are recorded. Logging is stopped when the eccentric magnetic locator 24 is lowered below the fish roof 31. And rotating the drilling tool 3 clockwise again for an angle, lifting the drilling tool for logging, and recording a magnetic positioning curve. And the drilling tool 3 is reciprocated until the drilling tool rotates one circle. The graph with the maximum signal of the fish top 31 is found on the magnetic positioning log. The angle of the drilling tool 3 at logging is determined and the drilling tool 3 is rotated to this angle. A gyro instrument is lowered into the drill tool 3 to measure the orientation of the navigation key 12 in the bent drill pipe 11. This direction is also the direction of the magnetic locator 24, i.e. the orientation of the fish head 31 relative to the borehole.
In one embodiment, the number of the connecting rods and the instrument joints is the same, and the connecting rods and the instrument joints are spaced apart. Preferably, the number of the connecting rods 26 is four, and the connecting rods are divided at the edge of the base 22 in 90 degrees with the center of the base 22. The cross section of the bottom of the connecting rod 26 is circular, and the circle of the cross section of the connecting rod 26 is inscribed on the edge of the base 22. The number of the instrument connectors 23 is four, and each of the instrument connectors 23 is disposed between two adjacent connecting rods 26. And, the circle of the cross section of the instrument connector 23 is inscribed in the edge of the base 22.
In this embodiment, the connecting rod 26 is made of stainless steel, aluminum alloy or other metal. Four connecting rods 26 are respectively connected to the edge of the main frame, and the circle of the cross section of each connecting rod 26 is internally tangent to the edge of the base 22. The connecting rods 26 are uniformly arranged on the edge of the base 22, and the main frame is constructed into an edge-supporting and hollow structure, so that the operations of butt joint, rotation and the like during connection of the bent drill rods 11 are facilitated, and the installation of the magnetic positioning instrument 24 is also facilitated.
In the present embodiment, "above" refers to the side closer to the wellhead 4, and "below" refers to the side farther from the wellhead 4.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, the appended claims are intended to be construed to include preferred embodiments and all such changes and/or modifications as fall within the scope of the invention, and all such changes and/or modifications as are made to the embodiments of the present invention are intended to be covered by the scope of the invention.
Claims (10)
1. A fish top position measuring method is characterized by comprising the following steps:
installing an eccentric magnetic positioning device at the lower end of the drill rod, and lowering the eccentric magnetic positioning device to a position below the fish top;
lifting the drill rod, lifting the position of the eccentric magnetic positioning device above the fish top, and measuring the position of the fish top by the eccentric magnetic positioning device through detecting the change of a magnetic field; rotating the drill rod by a certain angle, lowering the drill rod to enable the position of the eccentric magnetic positioning device to descend below the fish top, and simultaneously measuring the position of the fish top by the eccentric magnetic positioning device through detecting the change of a magnetic field;
rotating the drill rod for a certain angle again, and repeating the measurement operations of lifting and lowering the drill rod until the drill rod rotates for a circle;
comparing data of the position of the fish top measured in the process of lifting or lowering the drill rod, and judging the height position of the fish top; and comparing the data of the position of the fish top measured at each angle, and judging the direction position of the fish top.
2. The fish top position measuring method according to claim 1, wherein the eccentric magnetic positioning device is installed by fixing a bent drill rod at the bottom of the drill rod and installing a positioning device in a direction in which the bent drill rod is bent;
then, the eccentric magnetic positioning device is installed at the bottom of the bent drill rod, a magnetic positioning instrument is eccentrically arranged in the eccentric magnetic positioning device, and the eccentric direction of the magnetic positioning instrument is consistent with the direction of the positioning device.
3. The fish top position measuring method according to claim 2, wherein a plurality of connecting rods are fixed to the edge of the base when the eccentric magnetic positioning device is assembled; and connecting the upper end of the connecting rod with an upper connector, wherein the upper part of the upper connector is detachably connected with the bent drill rod.
4. The fish-top position measuring method as claimed in claim 3, wherein a plurality of instrument connectors are uniformly arranged on the edge of the base of the eccentric magnetic positioning device, the instrument connectors are arranged around the center of the base in a circle, and the magnetic positioning instrument is mounted on one of the instrument connectors.
5. The fish top position measuring method of claim 4, wherein the bent drill pipe and the upper joint are connected through threads; when the bent drill rod is connected with the upper joint, the eccentric magnetic positioning device is rotated, so that the eccentric direction of a magnetic positioning instrument on the eccentric magnetic positioning device is kept consistent with the direction of the positioning device under the condition that the bent drill rod is stably connected with the upper joint.
6. The fish-top position measuring method according to claim 4, wherein if the eccentric direction of the magnetic locator cannot be made to coincide with the direction of the positioning device while the kelly is in the tightened state with the upper joint, the magnetic locator is installed and replaced to the tool joint in the direction toward the positioning device.
7. The fish-top position measuring method according to any one of claims 4 to 6, wherein the positioning device comprises a positioning key provided on a side wall in a bending direction of the bent drill pipe, and a gyroscope for detecting a direction of the positioning key; the gyroscope is placed underground along with the drilling tool, and the direction of the positioning key is detected underground when the position of the fish top is detected.
8. The fish top position measuring method of claim 7, wherein the drill rod rotates by 10-30 degrees after the drill rod is lifted up or lowered down.
9. The fish-top position measuring method according to claim 8, wherein the number of the connecting rods and the instrument joints is the same, and the connecting rods and the instrument joints are spaced apart.
10. The fish top position measuring method according to claim 9, wherein the connecting rod is made of stainless steel or aluminum alloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911116464.8A CN110805431B (en) | 2019-11-15 | 2019-11-15 | Fish top position measuring method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911116464.8A CN110805431B (en) | 2019-11-15 | 2019-11-15 | Fish top position measuring method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110805431A CN110805431A (en) | 2020-02-18 |
| CN110805431B true CN110805431B (en) | 2021-07-30 |
Family
ID=69502813
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911116464.8A Active CN110805431B (en) | 2019-11-15 | 2019-11-15 | Fish top position measuring method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110805431B (en) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU1819995C (en) * | 1989-06-09 | 1993-06-07 | Всесоюзный научно-исследовательский институт нефтепромысловой геофизики | Method for location of objects in well during well drilling and operation |
| CN2380679Y (en) * | 1999-06-29 | 2000-05-31 | 杜晓瑞 | Multi-gear fisher |
| US7334650B2 (en) * | 2000-04-13 | 2008-02-26 | Weatherford/Lamb, Inc. | Apparatus and methods for drilling a wellbore using casing |
| US7591307B2 (en) * | 2006-09-07 | 2009-09-22 | Sondex Ltd | Method of and system for determining the free point in a drill pipe |
| CN203201515U (en) * | 2013-04-24 | 2013-09-18 | 中国石油集团渤海钻探工程有限公司 | Underground fishing tool |
| CN106223891A (en) * | 2016-08-12 | 2016-12-14 | 中国石油化工股份有限公司 | A kind of throw in catcher |
-
2019
- 2019-11-15 CN CN201911116464.8A patent/CN110805431B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN110805431A (en) | 2020-02-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6378607B1 (en) | Method and system for oriented perforating in a well with permanent sensors | |
| US9464519B2 (en) | Method and apparatus for detecting gamma radiation downhole | |
| US7346455B2 (en) | Wellbore evaluation system and method | |
| CA2270637C (en) | A method for determining drill collar whirl in a bottom hole assembly and method for determining borehole size | |
| RU2661943C1 (en) | Drilling tool rotation and orientation of magnetic sensor | |
| NO320776B1 (en) | Method and apparatus for orienting a side boundary tool in a well liner by acoustically locating an indexing device | |
| EP1524402B1 (en) | Apparatus for downhole strain measurements and methods of using same | |
| NO337591B1 (en) | Magnetometers for measurement-under-drilling applications | |
| WO2008030982A2 (en) | Casing detection | |
| US20160003028A1 (en) | Automatic Wellbore Survey Evaluation | |
| CN110805431B (en) | Fish top position measuring method | |
| CN211342903U (en) | Fish top position measuring device | |
| RU2066749C1 (en) | Method for determination of wellbore inclination and direction of cased well | |
| CN111119863A (en) | Fish measuring cable logging instrument based on magnetic signal and ultrasonic wave principle | |
| US9081112B1 (en) | Borehole seismic system | |
| CN111119861A (en) | Electric method and ultrasonic wave principle-based cable logging instrument for measuring fish falling | |
| US6725927B2 (en) | Method and system for avoiding damage to behind-casing structures | |
| JP3599925B2 (en) | Drilling information measuring device and drilling management method | |
| CN111119862A (en) | Logging-while-drilling instrument for fish measurement based on electrical method and ultrasonic wave principle | |
| CN1283895C (en) | Method and apparatus for locating indexing systems in cased well and conducting multilateral branch operations | |
| CN111119867A (en) | Logging-while-drilling instrument for fish measurement based on magnetic signal and ultrasonic wave principle | |
| CN113216843B (en) | Method for orientation by using deflecting drilling tool structure | |
| CN213627562U (en) | Ultra-short radius measuring tool for underground measurable well deviation direction | |
| RU2015291C1 (en) | Method for drilling horizontal wells | |
| WO2007006105A1 (en) | A line marker |
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 | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20200916 Address after: 100007 Beijing, Dongzhimen, North Street, No. 9, No. Applicant after: CHINA NATIONAL PETROLEUM Corp. Applicant after: CHINA PETROLEUM LOGGING Co.,Ltd. Applicant after: North China branch of CNPC logging Co.,Ltd. Address before: 062550 No. 002, Bohai East Road, Renqiu City, Cangzhou City, Hebei Province Applicant before: North China branch of CNPC logging Co.,Ltd. |
|
| TA01 | Transfer of patent application right | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |