CN211342903U - Fish top position measuring device - Google Patents
Fish top position measuring device Download PDFInfo
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- CN211342903U CN211342903U CN201921971659.6U CN201921971659U CN211342903U CN 211342903 U CN211342903 U CN 211342903U CN 201921971659 U CN201921971659 U CN 201921971659U CN 211342903 U CN211342903 U CN 211342903U
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- drill rod
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Abstract
The utility model provides a fish top position measuring device, which comprises a drill rod, wherein the drill rod comprises a drill rod main body extending from a well mouth to the underground and a bent drill rod arranged at the lower end of the drill rod main body; the eccentric magnetic positioning device is arranged at the bottom of the bent drill rod and is of a cylindrical structure, the central axis of the eccentric magnetic positioning device is parallel to the central axis of the drill rod main body, a magnetic positioning instrument is arranged in the eccentric magnetic positioning device, and the eccentric direction of the magnetic positioning instrument is the same as the bending direction of the bent drill rod; the magnetic locator measures and records a magnetic field near the top of the fish, when the eccentric magnetic positioning device moves along the axial direction along with the drill rod, the magnetic force between the magnetic locator and the top of the fish changes along with the position change, and the magnetic force is the largest when the distance between the magnetic locator and the top of the fish is the shortest. The utility model discloses can also give the degree of depth of confirming the fish top and the position of the relative well of fish top when the fish top is far away from the well head.
Description
Technical Field
The utility model relates to a fish top position measuring device for the degree of depth of measuring the fish top and the position of relative well when 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.
SUMMERY OF THE UTILITY MODEL
To the above-mentioned technical problem that exists among the prior art, the utility model provides a fish top position measuring device can also give the degree of depth of confirming the fish top and the position of the relative well of fish top when the fish top is far away from the well head.
In order to realize the above utility model purpose, the utility model provides a fish top position measuring device, include:
a drill pipe including a drill pipe body extending from a wellhead to a downhole, and a bent drill pipe disposed at a lower end of the drill pipe body;
the eccentric magnetic positioning device is arranged at the bottom of the bent drill rod and is of a cylindrical structure, the central axis of the eccentric magnetic positioning device is parallel to the central axis of the drill rod main body, a magnetic positioning instrument is arranged in the eccentric magnetic positioning device, and the eccentric direction of the magnetic positioning instrument is the same as the bending direction of the bent drill rod;
the magnetic locator measures and records a magnetic field near the top of the fish, when the eccentric magnetic positioning device moves along the axial direction along with the drill rod, the magnetic force between the magnetic locator and the top of the fish changes along with the position change, and the magnetic force is the largest when the distance between the magnetic locator and the top of the fish is the shortest.
The utility model discloses a further improvement lies in, be provided with positioner on the lateral wall of curved drilling rod, positioner for the direction at the center of drilling rod with the eccentric direction of magnetic locator keeps unanimous.
The utility model discloses a further improvement lies in, positioner is including setting up navigation key on the curved drilling rod lateral wall is provided with the gyroscope on the drilling tool, the gyroscope detects the position of navigation key is in order to confirm the direction at magnetic locator place.
The utility model discloses a further improvement lies in, eccentric electromagnetic positioning device includes the body frame, be provided with a plurality of instrument joints on the body frame, the instrument joint is in arrange a week in the body frame, magnetic locator selectively connects on an instrument joint.
The utility model is further improved in that the main frame comprises a base arranged at the lower end and an upper joint arranged at the upper end, and the upper joint is connected with the bent drill rod; the base is connected with the upper joint through a plurality of connecting rods.
The utility model discloses a further improvement lies in, the instrument connects for cylindric structure, and is a plurality of the instrument connects and sets up respectively be close to the position at edge on the base, and with the base sets up a week as the center.
The utility model has the further improvement that the number of the connecting rods is four, and the connecting rods are distributed on the edge of the base in a 90-degree manner by taking the circle center of the base as a circle center; the circle of the cross section of the connecting rod is inscribed on the edge of the base.
The utility model has the further improvement that the number of the instrument joints is four, and each instrument joint is arranged between two adjacent connecting rods; and the circle of the cross section of the instrument joint is inscribed on the edge of the base.
The utility model discloses a further improvement lies in, the upper end of magnetic locator is provided with the cable head.
The utility model discloses a further improvement lies in, curved drilling rod with through bolt or threaded connection between the top connection.
Compared with the prior art, the utility model has the advantages of:
the utility model discloses a fish top position measuring device can also give the degree of depth and the relative well position in fish top of confirming the fish top when the fish top is far away from the well head. 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 ordinary magnetic positioning instrument. However, by using the fish-top position measuring device of the present invention, it is possible to make the magnetic positioning instrument close to the fish-top by rotating the drill rod, thereby measuring the fish-top signal.
Drawings
Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, in which:
fig. 1 is a schematic structural diagram of a fish top position measuring device according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of an eccentric magnetic positioning device according to an embodiment of the present invention;
fig. 3 is a schematic cross-sectional view of an eccentric magnetic positioning device 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 drill rod main body, 12, a bent drill rod, 13, 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 clearly understood, the following description is made in further detail with reference to the accompanying drawings. It is obvious that the described embodiments are only a part of the embodiments of the present 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.
Fig. 1 schematically shows a fish-top position measuring device according to an embodiment of the present invention, which can also determine the depth of the fish-top and the position of the fish-top relative to the borehole when the fish-top is far from the wellhead.
A fish-top position measuring device according to one embodiment shown in fig. 1 comprises a drill rod 1. The drill rod 1 comprises a rod body 11 and a bent rod 12, the rod body 11 extending downhole from the wellhead 4, the bent rod 12 being disposed downhole and connected at the bottom of the rod body 11. The drill rod body 11 is a relatively straight rod body, the middle part of the bent drill rod 12 is bent, the central axis of the upper end of the bent drill rod 12 is overlapped with the central axis of the drill rod body 11, the central axis of the lower end of the bent drill rod 12 is parallel to the central axis of the drill rod body 11, and a certain distance is reserved between the central axis of the upper end of the bent drill rod 12 and the central axis of the lower end of the bent drill rod 12 due to the fact that the bent part is arranged. In this embodiment, the fish-top position measuring device further comprises an eccentric magnetic positioning device 2, and the eccentric magnetic positioning device 2 is connected to the bottom of the bent drill rod 12. 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 12 and is parallel to the central axis of the drill rod body 11. 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 12, that is, the direction of the central axis of the magnetic locator 24 relative to the central axis of the drill pipe body 11 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.
In using the fish top position measuring device according to the present embodiment, the fish top position measuring device is first assembled, after which the eccentric magnetic positioning device 2 is lowered with the drill pipe 1 into position near the downhole fish top 31. When an angle is selected, the drill rod is lifted up or lowered down for logging, the magnetic locator 24 in the eccentric magnetic locating device 2 measures the underground magnetic field, the magnetic locator 24 and the fish top 31 are magnetically attracted, when the drill rod is lifted up or lowered down for logging, the magnetic locator 24 moves in a certain height range and can detect the maximum magnetic force when moving to be closest to the fish top 31, and therefore the height position of the fish top 31 is judged. Then the drill rod 1 is rotated by a certain angle, the eccentric magnetic positioning device 2 is rotated by a certain angle, the operations are repeated, and the measured data of the angles are compared, so that the angle of the fish is judged. So that the height position and the angular position of the fish head 31 can be measured.
In one embodiment, the side wall of the bent drill rod 12 is provided with a positioning device which faces in the direction of the side wall of the drill rod 1 in line with the direction of bending of the bent drill rod 12 and at the same time in line with the direction of eccentricity of the magnetic positioning device. 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 13, said positioning key 13 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 13 in the bent drill pipe 12. 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 embodiment, the position of the positioning key 13 is detected by the gyroscope on the drilling tool 3, so that the eccentric position of the magnetic locator 24 can be correspondingly detected. And comparing the data in the plurality of groups of directions to determine the direction of the fish top 31.
In one embodiment, as shown in fig. 2, the eccentric magnetic positioning device 2 comprises a main frame, on which a plurality of instrument connectors 23 are arranged, and the instrument connectors 23 are used for connecting with a magnetic positioning instrument 24. In the present embodiment, the instrument connectors 23 are provided in plural numbers, and are provided on the main frame 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 12, the instrument connector 23 at the corresponding position on the main frame is determined and selected according to the position of the positioning key 13 on the bent drill rod 12, and the eccentric direction of the magnetic positioning instrument 24 is ensured to be consistent with the direction of the positioning key 13.
In one embodiment, the main frame comprises a base 22 arranged at the bottom end and an upper joint 21 arranged at the top end, the upper joint 21 is used for connecting the bent drill pipe 12, and the base 22 is used for fixing an instrument joint 23 and a magnetic locator 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. In the present embodiment, the upper joint 21 and the base 22 are both circular structures, and are connected by the connecting rod 26 into a substantially cylindrical structure without a 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.
In one embodiment, the instrument connector 23 is a cylindrical structure, and a plurality of the instrument connectors 23 are respectively disposed on the base 22 near the edge and are disposed 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 one embodiment, the connecting rods 26 are four in number and are divided at 90 degrees from the center of the base 22 at the edge 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.
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 at 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 12 are facilitated, and the installation of the magnetic positioning instrument 24 is also facilitated.
In one embodiment, the number of the instrument connectors 23 is four, and each instrument connector 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 one embodiment, a cable head 25 is provided at the upper end of the magnetic locator 24. The magnetic locator 24 is connected with a power supply or transmits a locating signal through a cable connector.
In one embodiment, the bent drill pipe 12 and the upper joint 21 are connected by bolts. The edge of the bent drill rod 12 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 12 together. The connection is stable and the disassembly and the assembly are convenient in a bolt connection mode. Of course, the bent drill rod 12 and the upper joint 21 may be connected by a screw, but the screw connection is not easy to align the eccentric direction of the bent drill rod 12 and the eccentric magnetic positioning device 2.
In using the fish top position measuring device according to the present embodiment, the eccentric magnetic positioning device 2 is attached to the bent drill pipe 12. The magnetic locator 24 is adjusted to the bending direction of the bent drill pipe 12 by installing the magnetic locator 24 on different instrument connectors 23 and adjusting the tightness degree of the eccentric magnetic locator 24 and the bent drill pipe 12. The upper end of the bent drill rod 12 is internally provided with a positioning key 13. The orientation of the orientation key 13 is consistent with the direction of bending of the bent drill rod 12. At this time, the direction of the magnetic orientation also coincides with the direction in which the bent drill pipe 12 is bent. The upper end of the bent drill pipe 12 is connected with the drill pipe 1, and the eccentric magnetic locator 24 and the pipe column are put into the well.
When the eccentric magnetic locator 24 descends below the fish top 31, the drill pipe 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 drill string is lowered down the well log while rotating the drill tool 3 clockwise through an angle of, for example, 1/16 turns, while recording the magnetic positioning curve. Logging is stopped when the eccentric magnetic locator 24 is lowered below the fish roof 31. And rotating the drilling tool 3 clockwise for an angle again, lifting the drill rod for logging, and recording the 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 13 in the bent drill pipe 12. 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 present embodiment, "above" refers to the side closer to the wellhead 4, and "below" refers to the side farther from the wellhead 4.
While the 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 device, comprising:
a drill rod (1), the drill rod (1) comprising a drill rod body (11) extending downhole from a well head (4), and a bent drill rod (12) arranged at a lower end of the drill rod body (11);
the eccentric magnetic positioning device (2) is arranged at the bottom of the bent drill rod (12), the eccentric magnetic positioning device (2) is of a cylindrical structure, the central axis of the eccentric magnetic positioning device is parallel to the central axis of the drill rod body (11), a magnetic positioning instrument (24) is arranged in the eccentric magnetic positioning device (2), and the eccentric direction of the magnetic positioning instrument (24) is the same as the bending direction of the bent drill rod (12);
the magnetic locator (24) measures and records a magnetic field near 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 change of the position, and the magnetic force is the largest when the distance between the magnetic locator (24) and the fish top (31) is the shortest.
2. Fish-top position measuring device according to claim 1, characterized in that the side wall of the bent drill rod (12) is provided with positioning means, the direction of which relative to the centre of the drill rod (1) coincides with the direction of eccentricity of the magnetic locator (24).
3. The fish top position measuring device according to claim 2, characterized in that the positioning device comprises a positioning key (13) arranged on the side wall of the bent drill pipe (12), and a gyroscope is arranged on the drill pipe (3), and the gyroscope detects the position of the positioning key (13) to determine the direction in which the magnetic locator (24) is located.
4. A fish head position measuring device according to any one of claims 1-3, c h a r a c t e r i z e d in that the eccentric magnetic positioning device comprises a main frame on which a number of instrument joints (23) are arranged, the instrument joints (23) being arranged around in the main frame, the magnetic positioning tool (24) being selectively attached to one instrument joint (23).
5. The fish top position measuring device according to claim 4, characterized in that the main frame comprises a base (22) arranged at a lower end and an upper joint (21) arranged at an upper end, the upper joint (21) being connected with the bent drill pipe (12); the base (22) is connected with the upper joint (21) through a plurality of connecting rods (26).
6. The fish top position measuring device according to claim 5, wherein the instrument connector (23) has a cylindrical structure, and a 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).
7. Fish top position measuring device according to claim 5 or 6, characterized in that the number of connecting rods (26) is four and is divided at the edge of the base (22) at 90 degrees around the centre of the base (22); the circle of the cross section of the connecting rod (26) is inscribed on the edge of the base (22).
8. The fish-top position measuring device according to claim 7, wherein the number of the instrument joints (23) is four, each instrument joint (23) being arranged between two adjacent connecting rods (26); and the circle of the cross section of the instrument joint (23) is inscribed on the edge of the base (22).
9. Fish head position measuring device according to claim 8, characterized in that the magnetic locator (24) is provided with a cable head (25) at its upper end.
10. Fish top position measuring device according to claim 5 or 6, characterized in that the bent drill pipe (12) and the upper joint (21) are connected by means of bolts or threads.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921971659.6U CN211342903U (en) | 2019-11-15 | 2019-11-15 | Fish top position measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921971659.6U CN211342903U (en) | 2019-11-15 | 2019-11-15 | Fish top position measuring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211342903U true CN211342903U (en) | 2020-08-25 |
Family
ID=72132705
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921971659.6U Expired - Fee Related CN211342903U (en) | 2019-11-15 | 2019-11-15 | Fish top position measuring device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211342903U (en) |
-
2019
- 2019-11-15 CN CN201921971659.6U patent/CN211342903U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20200922 Address after: 100007 Beijing, Dongzhimen, North Street, No. 9, No. Patentee after: CHINA NATIONAL PETROLEUM Corp. Patentee after: CHINA PETROLEUM LOGGING Co.,Ltd. Patentee after: North China branch of CNPC logging Co.,Ltd. Address before: 062550 No. 002, Bohai East Road, Renqiu City, Cangzhou City, Hebei Province Patentee before: North China branch of CNPC logging Co.,Ltd. |
|
| TR01 | Transfer of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200825 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |