CN110617061A - Drill collar structure of while-drilling nuclear magnetic logging instrument - Google Patents
Drill collar structure of while-drilling nuclear magnetic logging instrument Download PDFInfo
- Publication number
- CN110617061A CN110617061A CN201910890269.4A CN201910890269A CN110617061A CN 110617061 A CN110617061 A CN 110617061A CN 201910890269 A CN201910890269 A CN 201910890269A CN 110617061 A CN110617061 A CN 110617061A
- Authority
- CN
- China
- Prior art keywords
- drill collar
- collar body
- magnet
- nuclear magnetic
- wall
- 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.)
- Pending
Links
- 238000005553 drilling Methods 0.000 title claims abstract description 24
- 239000011152 fibreglass Substances 0.000 claims abstract description 19
- 239000004519 grease Substances 0.000 claims abstract description 8
- 238000007789 sealing Methods 0.000 claims description 13
- 238000001514 detection method Methods 0.000 claims description 7
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- 239000011521 glass Substances 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- 239000000523 sample Substances 0.000 abstract description 17
- 230000003068 static effect Effects 0.000 abstract description 7
- 230000009286 beneficial effect Effects 0.000 abstract description 4
- 238000002592 echocardiography Methods 0.000 abstract description 3
- 238000005481 NMR spectroscopy Methods 0.000 description 7
- BGPVFRJUHWVFKM-UHFFFAOYSA-N N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] Chemical compound N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] BGPVFRJUHWVFKM-UHFFFAOYSA-N 0.000 description 6
- 239000012530 fluid Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000001681 protective effect Effects 0.000 description 2
- 229920002430 Fibre-reinforced plastic Polymers 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011151 fibre-reinforced plastic Substances 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 239000005281 nonmetallic glass Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/10—Wear protectors; Centralising devices, e.g. stabilisers
- E21B17/1078—Stabilisers or centralisers for casing, tubing or drill pipes
-
- 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
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/16—Drill collars
-
- 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
- E21B47/01—Devices for supporting measuring instruments on drill bits, pipes, rods or wirelines; Protecting measuring instruments in boreholes against heat, shock, pressure or the like
- E21B47/017—Protecting measuring instruments
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
- G01V3/18—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation specially adapted for well-logging
- G01V3/32—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation specially adapted for well-logging operating with electron or nuclear magnetic resonance
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Fluid Mechanics (AREA)
- Geochemistry & Mineralogy (AREA)
- Geophysics (AREA)
- Mechanical Engineering (AREA)
- High Energy & Nuclear Physics (AREA)
- Remote Sensing (AREA)
- General Physics & Mathematics (AREA)
- Geophysics And Detection Of Objects (AREA)
Abstract
The invention relates to a drill collar structure of a nuclear magnetic logging-while-drilling instrument, which is provided with a hollow drill collar body, wherein an antenna is arranged on the outer wall of the drill collar body, a support sleeve is arranged in the drill collar body in a matching way, outer-layer magnets are respectively arranged on the outer walls of the drill collar body positioned at two sides of the antenna, inner-layer magnets corresponding to the outer-layer magnets are arranged between the periphery of the support sleeve and the inner wall of the drill collar body at intervals, a glass fiber reinforced plastic outer cover wrapping the outer-layer magnets and the antenna is arranged at the periphery of the drill collar body, and incompressible grease is filled between the glass fiber reinforced plastic outer cover and the drill collar body. The invention can be provided with more magnets to improve the intensity of the static magnetic field around the probe by arranging the inner and outer layer magnets, solves the problem of limited volume of the magnet of the traditional logging instrument, can ensure the normal emission of alternating electromagnetic wave signals and the correct reception of nuclear magnetic echoes by adopting the glass fiber reinforced plastic outer cover, and can fill the incompressible grease, thereby being beneficial to improving the use intensity of the glass fiber reinforced plastic outer cover and preventing the probe of the logging instrument from being damaged under high pressure.
Description
Technical Field
The invention relates to the technical field of nuclear magnetic resonance logging, in particular to a drill collar structure of a nuclear magnetic logging while drilling instrument.
Background
The nuclear magnetic resonance logging while drilling is a new logging technology suitable for open hole well, and is the only logging method which can directly measure the seepage volume characteristics of free fluids (oil, gas and water) of any lithologic reservoir at present. The nuclear magnetic resonance logging while drilling instrument mainly comprises a probe, an electronic circuit, a power supply and control acquisition and processing software. The probe comprises a magnet and an antenna, is the core of the whole system, and is a mark for the development of the nuclear magnetic resonance logging instrument. The magnet generates a static magnetic field, and the antenna is used for emitting an alternating magnetic field perpendicular to the direction of the static magnetic field and receiving a nuclear magnetic resonance signal.
The probe configuration determines the performance of the nmr tool. The probe is hung in a non-magnetic drill collar and is used as a carrier of the probe, and the drill collar plays a role in supporting and protecting the probe. The nuclear magnetic resonance logging while drilling instrument is used as a part of a bottom drilling tool assembly, a channel for circulating drilling fluid must be arranged in the center of a magnet, an instrument framework also needs to occupy larger space in order to bear strong mechanical motion in a drilling process, the volume of the magnet of the nuclear magnetic resonance logging while drilling instrument is strictly limited, and corresponding materials, more reasonable magnet and framework design need to be searched to ensure the strength of a static magnetic field. The strength of an instrument sealing system and the strength of a probe part protective cover are the key points of a drill collar structure, the pressure of slurry and drilling fluid is high in the underground drilling process, and once the instrument sealing system or the probe protective cover is damaged, a probe can be damaged, so that great loss is caused. In addition, the depth of investigation of the instrument depends on the borehole size and instrument eccentricity, and the instrument should be as central as possible in the borehole during drilling.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: in order to overcome the defects in the prior art, the invention provides a drill collar structure of a nuclear magnetic logging while drilling instrument, which is provided with more magnets, improves the strength of a static magnetic field around a probe and better solves the problem of limited magnet volume.
The technical scheme adopted by the invention for solving the technical problems is as follows: the utility model provides a drill collar structure of nuclear magnetic logging instrument while drilling, has inside hollow drill collar body, drill collar body outer wall is provided with the antenna, this internal cooperation of drill collar be equipped with the support sleeve, be located the drill collar body outer wall of antenna both sides and divide and be equipped with outer magnet, the interval is equipped with the inlayer magnet that corresponds with outer magnet between support sleeve periphery and the drill collar body inner wall, drill collar body periphery is equipped with the parcel and lives the glass steel dustcoat of outer magnet and antenna, it has incompressible grease to fill between glass steel dustcoat and the drill collar body.
In order to obtain relatively large detection depth, spiral centralizers for preventing the logging instrument from moving laterally during detection are respectively arranged on the outer walls of the drill collar bodies positioned at the two ends of the glass fiber reinforced plastic outer cover.
Preferably, to ensure that the drill collar body has sufficient strength, the thickness of the outer magnet is less than that of the inner magnet.
Furthermore, a first groove for accommodating the outer-layer magnet is formed in the outer wall of the drill collar body, a second groove for accommodating the inner-layer magnet is formed in the outer wall of the supporting sleeve, and the antenna is embedded in the outer wall of the drill collar body between the first grooves.
In order to improve the safety of the drill collar sealing system, O-shaped sealing rings with check rings are arranged between the glass fiber reinforced plastic outer cover and the drill collar body and between the two ends of the supporting sleeve and the inner wall of the drill collar body.
The invention has the beneficial effects that: the invention improves the strength of the static magnetic field around the probe by arranging the outer magnet and the inner magnet, solves the problem of limited volume of the magnet of the traditional logging instrument, adopts the nonmetal glass fiber reinforced plastic outer cover to protect the outer magnet, the inner magnet and the antenna, ensures the normal emission of alternating electromagnetic wave signals and the correct receiving of nuclear magnetic echoes, fills the incompressible grease, is beneficial to improving the use strength of the glass fiber reinforced plastic outer cover and prevents the probe of the logging instrument from being damaged under high-pressure detection.
Drawings
The invention is further described with reference to the following figures and embodiments.
Fig. 1 is a schematic structural view of the present invention.
In the figure: 1. the drill collar comprises a drill collar body, 2 a spiral centralizer, 3 an outer magnet, 4 an inner magnet, 5 a glass fiber reinforced plastic outer cover, 6 an antenna, 7 a support sleeve, 8 an O-shaped sealing ring, 9 a first groove and 10 a second groove.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic views illustrating only the basic structure of the present invention in a schematic manner, and thus show only the constitution related to the present invention.
As shown in figure 1, the drill collar structure of the nuclear magnetic logging while drilling instrument comprises a hollow drill collar body 1, wherein an antenna 6 is arranged on the outer wall of the drill collar body 1, a support sleeve 7 is arranged in the drill collar body 1 in a matched mode, first grooves 9 are formed in the outer wall of the drill collar body 1 on two sides of the antenna 6 respectively, the antenna 6 is embedded in the outer wall of the drill collar body 1 between the first grooves 9, a second groove 10 is formed in the outer peripheral wall of the support sleeve 7 corresponding to the first groove 9, an outer magnet 3 is arranged in the first groove 9, and an inner magnet 4 is arranged in the second groove 10. Preferably, the thickness of the outer magnet 3 is slightly smaller than that of the inner magnet 4, the length of the outer magnet 3 is also slightly smaller than that of the inner magnet 4, and the thicknesses of the outer magnet 3 and the inner magnet 4 can be adjusted according to requirements in actual use to ensure that the drill collar body 1 has sufficient strength.
The drill collar body 1 is provided with a glass fiber reinforced plastic outer cover 5 wrapping the outer layer magnet 3 and the antenna 6 at the periphery, and incompressible grease is filled between the glass fiber reinforced plastic outer cover 5 and the drill collar body 1. During the drilling process, drilling fluid, mud and the like around the drill collar body 1 easily impact the drill collar body 1, and the glass fiber reinforced plastic outer cover 5 can be effectively supported by the filling of the incompressible grease, so that the glass fiber reinforced plastic outer cover 5 is not damaged under the pressure impact of more than 140MPa around the glass fiber reinforced plastic outer cover, and a logging instrument probe is protected powerfully.
The outer walls of the drill collar bodies 1 at two ends of the glass fiber reinforced plastic outer cover 5 are respectively provided with spiral centralizers 2 for preventing the logging instrument from moving laterally, and the detection depth of the logging instrument depends on the size of a borehole and the eccentricity of the instrument, so that the logging instrument can be positioned in a central position in the borehole by arranging the spiral centralizers 2 to reduce the lateral movement of the logging instrument, and further obtain relatively large detection depth.
O-shaped sealing rings 8 are arranged between the glass fiber reinforced plastic outer cover 5 and the drill collar body 1 and between the two ends of the supporting sleeve 7 and the inner wall of the drill collar body 1. The O-shaped sealing ring 8 is matched with a retainer ring to bear the pressure exceeding 140MPa, and each sealing part adopts a sealing structure of multiple O-shaped sealing rings 8, so that the multiple sealing protection effect is achieved, and the safety of a drill collar sealing system is improved.
The invention improves the strength of the static magnetic field around the probe by arranging the outer magnet 3 and the inner magnet 4, solves the problem of limited volume of the magnet of the traditional logging instrument, adopts the nonmetallic glass fiber reinforced plastic outer cover 5 to protect the outer magnet 3, the inner magnet 4 and the antenna 6, ensures the normal emission of alternating electromagnetic wave signals and the correct receiving of nuclear magnetic echoes, fills the incompressible grease, is beneficial to improving the use strength of the glass fiber reinforced plastic outer cover 5, and prevents the probe of the logging instrument from being damaged during high-pressure detection.
In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (5)
1. The utility model provides a drill collar structure of nuclear magnetic logging instrument while drilling, has inside hollow drill collar body (1), and drill collar body (1) outer wall is provided with antenna (6), characterized by: drill collar body (1) fit in be equipped with support sleeve (7), drill collar body (1) outer wall that is located antenna (6) both sides divides to be equipped with outer magnet (3), the interval is equipped with inner magnet (4) that correspond with outer magnet (3) between support sleeve (7) periphery and drill collar body (1) inner wall, drill collar body (1) periphery is equipped with the parcel and lives glass steel dustcoat (5) of outer magnet (3) and antenna (6), it has incompressible grease to fill between glass steel dustcoat (5) and drill collar body (1).
2. The drill collar structure of the nuclear magnetic logging while drilling instrument as recited in claim 1, wherein: the outer walls of the drill collar body (1) at the two ends of the glass fiber reinforced plastic outer cover (5) are respectively provided with a spiral centralizer (2) for preventing the logging instrument from generating lateral movement during detection.
3. The drill collar structure of the nuclear magnetic logging while drilling instrument as recited in claim 1, wherein: the thickness of the outer layer magnet (3) is smaller than that of the inner layer magnet (4).
4. The drill collar structure of the nuclear magnetic logging while drilling instrument as recited in claim 3, wherein: the drill collar comprises a drill collar body (1), wherein a first groove (9) for accommodating an outer-layer magnet (3) is formed in the outer wall of the drill collar body (1), a second groove (10) for accommodating an inner-layer magnet (4) is formed in the outer wall of a supporting sleeve (7), and an antenna (6) is embedded in the outer wall of the drill collar body (1) between the first grooves (9).
5. The drill collar structure of the nuclear magnetic logging while drilling instrument as recited in claim 1, wherein: and O-shaped sealing rings (8) provided with check rings are arranged between the glass fiber reinforced plastic outer cover (5) and the drill collar body (1) and between the two ends of the supporting sleeve (7) and the inner wall of the drill collar body (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910890269.4A CN110617061A (en) | 2019-09-20 | 2019-09-20 | Drill collar structure of while-drilling nuclear magnetic logging instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910890269.4A CN110617061A (en) | 2019-09-20 | 2019-09-20 | Drill collar structure of while-drilling nuclear magnetic logging instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110617061A true CN110617061A (en) | 2019-12-27 |
Family
ID=68923741
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910890269.4A Pending CN110617061A (en) | 2019-09-20 | 2019-09-20 | Drill collar structure of while-drilling nuclear magnetic logging instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110617061A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111411944A (en) * | 2020-04-27 | 2020-07-14 | 无锡量子感知研究所 | Nuclear magnetic resonance logging while drilling instrument and working mode control method and system thereof |
| CN111911092A (en) * | 2020-09-08 | 2020-11-10 | 新疆华油油气工程有限公司 | Hydraulic control extendable and contractible drill collar while drilling |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0198985A1 (en) * | 1985-04-26 | 1986-10-29 | Schlumberger Limited | Induction logging sonde with metallic support |
| EP0932055A2 (en) * | 1998-01-21 | 1999-07-28 | Oxford Instruments Limited | NMR sensor |
| US6255817B1 (en) * | 1997-06-23 | 2001-07-03 | Schlumberger Technology Corporation | Nuclear magnetic resonance logging with azimuthal resolution |
| US6268726B1 (en) * | 1998-01-16 | 2001-07-31 | Numar Corporation | Method and apparatus for nuclear magnetic resonance measuring while drilling |
| WO2012068219A2 (en) * | 2010-11-19 | 2012-05-24 | Schlumberger Canada Limited | Nuclear magnetic resonance tool with external magnets |
| CN105298486A (en) * | 2015-11-25 | 2016-02-03 | 中国石油集团钻井工程技术研究院 | Downhole controllable nuclear magnetic resonance well logging during drilling device |
| US20180292562A1 (en) * | 2015-12-29 | 2018-10-11 | Halliburton Energy Services ,Inc. | External Housing For Signal To Noise Improvement |
| CN210829239U (en) * | 2019-09-20 | 2020-06-23 | 无锡量子感知研究所 | Drill collar structure of while-drilling nuclear magnetic logging instrument |
-
2019
- 2019-09-20 CN CN201910890269.4A patent/CN110617061A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0198985A1 (en) * | 1985-04-26 | 1986-10-29 | Schlumberger Limited | Induction logging sonde with metallic support |
| US6255817B1 (en) * | 1997-06-23 | 2001-07-03 | Schlumberger Technology Corporation | Nuclear magnetic resonance logging with azimuthal resolution |
| US6268726B1 (en) * | 1998-01-16 | 2001-07-31 | Numar Corporation | Method and apparatus for nuclear magnetic resonance measuring while drilling |
| EP0932055A2 (en) * | 1998-01-21 | 1999-07-28 | Oxford Instruments Limited | NMR sensor |
| WO2012068219A2 (en) * | 2010-11-19 | 2012-05-24 | Schlumberger Canada Limited | Nuclear magnetic resonance tool with external magnets |
| CN105298486A (en) * | 2015-11-25 | 2016-02-03 | 中国石油集团钻井工程技术研究院 | Downhole controllable nuclear magnetic resonance well logging during drilling device |
| US20180292562A1 (en) * | 2015-12-29 | 2018-10-11 | Halliburton Energy Services ,Inc. | External Housing For Signal To Noise Improvement |
| CN210829239U (en) * | 2019-09-20 | 2020-06-23 | 无锡量子感知研究所 | Drill collar structure of while-drilling nuclear magnetic logging instrument |
Non-Patent Citations (1)
| Title |
|---|
| 肖立志;: "井下极端条件核磁共振探测系统研制", 中国石油大学学报(自然科学版), no. 05, 20 October 2013 (2013-10-20) * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111411944A (en) * | 2020-04-27 | 2020-07-14 | 无锡量子感知研究所 | Nuclear magnetic resonance logging while drilling instrument and working mode control method and system thereof |
| CN111411944B (en) * | 2020-04-27 | 2024-04-09 | 国仪石油技术(无锡)有限公司 | Nuclear magnetic resonance logging while drilling instrument and working mode control method and system thereof |
| CN111911092A (en) * | 2020-09-08 | 2020-11-10 | 新疆华油油气工程有限公司 | Hydraulic control extendable and contractible drill collar while drilling |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
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| TA01 | Transfer of patent application right |
Effective date of registration: 20211208 Address after: 214000 No. 899, Huizhou Avenue, Qianzhou street, Huishan District, Wuxi City, Jiangsu Province (Urban Railway Huishan station area) Applicant after: Guoyi Petroleum Technology (Wuxi) Co.,Ltd. Address before: No.214000, Huishan District, Wuxi Station Applicant before: Wuxi Institute of quantum perception |