CN202946149U - Logging while drilling natural gamma logging instrument - Google Patents
Logging while drilling natural gamma logging instrument Download PDFInfo
- Publication number
- CN202946149U CN202946149U CN 201220549920 CN201220549920U CN202946149U CN 202946149 U CN202946149 U CN 202946149U CN 201220549920 CN201220549920 CN 201220549920 CN 201220549920 U CN201220549920 U CN 201220549920U CN 202946149 U CN202946149 U CN 202946149U
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- gamma
- damping
- gamma ray
- mwd
- photomultiplier
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Abstract
The utility model relates to a logging while drilling natural gamma logging instrument which comprises an outer sleeve, end caps arranged at two ends of the outer sleeve, a probe unit arranged inside the outer sleeve and a control circuit which is connected with the probe unit. The logging while drilling natural logging instrument can be used in a high vibration and high temperature environment and can transmit measurement data in real time.
Description
Technical field
The utility model belongs to the radioactive substance field of measuring technique, relates to a kind of down-hole natural gamma logging instrument, relates in particular to a kind of MWD gamma ray tool.
Technical background
In oil drilling and recovery process, in order to differentiate oil reservoir, and economical, carry out oil reservoir rationally, efficiently and gather, need to use various formation testings and assessment technique, obtaining well depth is the log of ordinate.Because various logs are all corresponding with well depth, so use well depth-gamma ray curve to become the important means that various logs carry out the well depth comparison.
Usually after the drilling well completion, use cable to put into well under the natural gamma logging device device, target zone is measured acquisition well depth-gamma ray curve.But even in horizontal well, logger is difficult to put into well by under gravity at big-inclination; In addition, in the bad situation of borehole wall situation, easily cave in and miss, also can cause difficulty to obtaining of well-log information; The mud that is used for circulating in drilling process also can produce the stratum and corrode, and causes measure error.So well depth-gamma ray curve that after drilling well is completed, well logging obtains can just bore with the stratum and produce difference when holding.If corroded or corrode by mud or drilling fluid on the stratum when very shallow, just can carry out well depth-gamma ray curve measurement, just can provide more accurate, real formation parameter and geologic feature data for the engineering staff.If the natural gamma logging device device is arranged near in the drilling tool of drill bit, with putting into well under drill bit, so just can not interrupt drilling process, will measure again gamma data simultaneously and be sent in real time ground system.
Contain the natural radioactivity material in the stratum, wherein main radioactive substance is uranium, thorium, potassium, and these materials radiate α, β and gamma-rays in decay process, and wherein the gamma-rays penetration capacity is strong, being difficult for by other material absorbing, is one of main detected object of well logging.Gamma ray log carries out stratigraphic analysis by measuring gamma ray intensity.Gamma ray log is measured the total natural gamma rays intensity in stratum, is mainly used in understanding strata condition and carries out the stratum comparison.When entering well measurements with drill bit below,, therefore easily obtain stratum and oil-gas Layer and do not polluted or pollute firsthand information when light close to drill bit due to the natural gamma logging short pitch.
The utility model content
In order to solve the above-mentioned technical problem that exists in background technology, but the utility model provide a kind of can be under height vibrations and hot environment use and the MWD gamma ray tool real-time Transmission survey data.
Technical solution of the present utility model is: the utility model provides a kind of MWD gamma ray tool, its special character is: described MWD gamma ray tool comprises outer sleeve, be arranged on the plug at outer sleeve two ends, be arranged on the contact unit of outer sleeve inside and the control circuit that is connected with contact unit.
Above-mentioned contact unit comprises scintillation crystal, reflecting layer, gamma cylinder, leaded light rubber cushion, shading sleeve and photomultiplier; Described scintillation crystal only leans against on photomultiplier by the leaded light rubber cushion; Be provided with the gamma cylinder between described scintillation crystal and leaded light rubber cushion; Described reflecting layer is sleeved on scintillation crystal; Described shading sleeve is sleeved on photomultiplier.
Above-mentioned MWD gamma ray tool comprises that also to be arranged on outer sleeve inner and act on damping part on contact unit.
Above-mentioned damping part comprises the internal damping parts; Described internal damping parts comprise the outer damping rubber cover that is arranged between reflecting layer and gamma cylinder and between gamma cylinder and shading sleeve and are arranged on internal damping rubber cushion between photomultiplier and outer sleeve.
Above-mentioned damping part also comprises outer damping part; Described outer damping part comprises the shock ring that is sleeved on the gamma cylinder.
Above-mentioned outer damping part also comprises damping spring and spring base; Described spring base is fixedly installed on outer sleeve inside; Described photomultiplier transit tube end is arranged on spring base by spring.
The utlity model has following advantage:
The utility model provides a kind of MWD gamma ray tool, and this instrument can also carry out transfer of data and communicate by letter except possessing the gamma ray log function in real time.The combination of multiple shock-damping structure improves a lot the shock resistance of probe, vibration ability, high temperature in the time of adapting to measurement while drilling, and high vibration environment uses; Simultaneously, improved circuit design, carried out modularized design, key element has adopted high temperature resistant, and the straight cutting element has strengthened the reliability of system in high temperature, high vibration environment greatly.The 3rd, the utility model has improved the interface of cable and bus dual mode, not only can carry out the signal transmission by cable, and also convenient and other equipment communicate, after particularly making up with pulse generator short node, realize the Wireless Data Transmission take mud as telecommunication media.The utility model can shake at height, use in hot environment.By real-time Data Transmission and communication function, this instrument can be used as the measurement pipe nipple and is carried on the communication pipe nipple, and by mud-pulse generation pipe nipple, in real time data is reached ground system.
Description of drawings
Fig. 1 is the structural representation of MWD gamma ray tool provided by the utility model;
Wherein:
The 1-lower end cap; The 2-glass window; The 3-reflecting layer; The outer damping gum cover of 4-; 5-gamma cylinder; 6-leaded light rubber cushion; 7-internal damping rubber cushion; The 8-shading sleeve; The 9-outer sleeve; The 10-high-pressure modular; 11-signal acquisition circuit plate; The 12-main control board; The 13-signal connector; The 14-upper plug head; The 15-DAC circuit board; The 16-spring base; The 17-damping spring; The 18-photomultiplier; The 19-shock ring; The 20-scintillation crystal.
The specific embodiment
Referring to Fig. 1, the utility model provides a kind of down-hole natural gamma logging instrument, this MWD gamma ray tool comprises outer sleeve 9, is arranged on the plug at outer sleeve 9 two ends, is arranged on the contact unit of outer sleeve 9 inside and the control circuit that is connected with contact unit.This MWD gamma ray tool can be connected with other pipe nipples in oil drilling or recovery process, carries out together work in the down-hole.
Contact unit comprises scintillation crystal 20, reflecting layer 3, gamma cylinder 5, leaded light rubber cushion 6, shading sleeve 8 and photomultiplier 18; Scintillation crystal 20 only leans against on photomultiplier by leaded light rubber cushion 6; Be provided with gamma cylinder 5 between scintillation crystal 20 and leaded light rubber cushion 6; Reflecting layer 3 is sleeved on scintillation crystal 20; Shading sleeve 8 is sleeved on photomultiplier 18.
MWD gamma ray tool comprises that also to be arranged on outer sleeve 9 inner and act on damping part on contact unit.
Damping part comprises the internal damping parts; The internal damping parts comprise be arranged on the outer damping gum cover 4 between reflecting layer 3 and gamma cylinder 5 and between gamma cylinder 5 and shading sleeve 8 and be arranged on photomultiplier 18 and outer sleeve 9 between internal damping rubber cushion 7.
Damping part also comprises outer damping part; Outer damping part comprises the shock ring 19 that is sleeved on gamma cylinder 5.
Outer damping part also comprises damping spring 17 and spring base 16; Spring base 16 is fixedly installed on outer sleeve 9 inside; Described photomultiplier 18 ends are arranged on spring base 16 by spring.
Comprise probe segment, frame for movement and circuit part.Wherein probe segment mainly comprises: reflecting layer 3, outer damping gum cover 4, gamma cylinder 5, leaded light rubber cushion 6, internal damping rubber cushion 7, shading sleeve 8, damping spring 17, photomultiplier 18, shock ring 19, scintillation crystal 20.Frame for movement comprises: lower end cap 1, glass window 2, outer sleeve 9, upper plug head 14, spring base 16.Circuit part comprises: high-pressure modular 10, signal acquisition circuit plate 11, main control board 12, signal connector 13, DAC circuit board 15.
After probe segment, scintillation crystal 20 are accepted natural gamma rays, generation is glistened, and is coupled into photomultiplier 18 through leaded light rubber cushion 6 photoelectric effect occur, and produces electronics, produces undersuings at photomultiplier 18 anodes after the multistage high pressure of electronics process doubles.
Scintillation crystal 20 outsides are reflecting layer 3, increase detectivity.Photomultiplier 18 outsides are internal damping rubber cushion 7 and shading sleeve 8, and wherein internal damping rubber cushion 7 is used for protecting photomultiplier 18, and shading sleeve 8 prevents that surround lighting from exerting an influence to measurement result.Creep into vibrations to the infringement of body scintillation crystal 20 and photomultiplier 18 in order to reduce drill bit, adopt inside and outside two-stage shock-damping structure, inner damping is protected by add outer damping gum cover 4 between reflecting layer 3, shading sleeve 8 and gamma cylinder 5.External vibration-absorbing reduces the radial vibration component by cover shock ring 19 on gamma cylinder 5, reduces the axial vibrations components at gamma cylinder 5 tops installation damping springs 17.By the two-stage shock-damping structure, improved natural gamma probe shock resistance and vibration resistance, make this probe can be used for measurement while drilling.
Circuit part, high-pressure modular 10 provides high voltage for photomultiplier 18, this high voltage can automatically adjust, regulate control signal from DAC circuit board 15, to be determined according to the signal from signal acquisition circuit plate 11 by main control board 12, and amplify to generate through DAC circuit board 15 and control voltage, deliver to high-pressure modular 10, carry out high voltage adjusting.
Claims (6)
1. MWD gamma ray tool, it is characterized in that: described MWD gamma ray tool comprises outer sleeve, is arranged on the plug at outer sleeve two ends, is arranged on the contact unit of outer sleeve inside and the control circuit that is connected with contact unit.
2. MWD gamma ray tool according to claim 1, it is characterized in that: described contact unit comprises scintillation crystal, reflecting layer, gamma cylinder, leaded light rubber cushion, shading sleeve and photomultiplier; Described scintillation crystal only leans against on photomultiplier by the leaded light rubber cushion; Be provided with the gamma cylinder between described scintillation crystal and leaded light rubber cushion; Described reflecting layer is sleeved on scintillation crystal; Described shading sleeve is sleeved on photomultiplier.
3. MWD gamma ray tool according to claim 2 is characterized in that: described MWD gamma ray tool comprises that also to be arranged on outer sleeve inner and act on damping part on contact unit.
4. MWD gamma ray tool according to claim 3, it is characterized in that: described damping part comprises the internal damping parts; Described internal damping parts comprise the outer damping rubber cover that is arranged between reflecting layer and gamma cylinder and between gamma cylinder and shading sleeve and are arranged on internal damping rubber cushion between photomultiplier and outer sleeve.
5. MWD gamma ray tool according to claim 3, it is characterized in that: described damping part also comprises outer damping part; Described outer damping part comprises the shock ring that is sleeved on the gamma cylinder.
6. MWD gamma ray tool according to claim 5, it is characterized in that: described outer damping part also comprises damping spring and spring base; Described spring base is fixedly installed on outer sleeve inside; Described photomultiplier transit tube end is arranged on spring base by spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220549920 CN202946149U (en) | 2012-10-24 | 2012-10-24 | Logging while drilling natural gamma logging instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220549920 CN202946149U (en) | 2012-10-24 | 2012-10-24 | Logging while drilling natural gamma logging instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202946149U true CN202946149U (en) | 2013-05-22 |
Family
ID=48421856
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220549920 Expired - Lifetime CN202946149U (en) | 2012-10-24 | 2012-10-24 | Logging while drilling natural gamma logging instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202946149U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103628869A (en) * | 2013-12-20 | 2014-03-12 | 孙俊佚雄 | Lithology-oriented online natural rock debris gamma logging instrument and logging method thereof |
| CN104373119A (en) * | 2014-10-11 | 2015-02-25 | 中国地质大学（武汉） | While-drilling natural gamma uranium measuring instrument based on rock core drilling |
| CN105134201A (en) * | 2015-09-25 | 2015-12-09 | 王佟 | Gamma ray spectrometry log tool |
| CN105863606A (en) * | 2015-01-19 | 2016-08-17 | 中国石油集团长城钻探工程有限公司 | Natural gamma-ray logging pup joint |
| CN106285639A (en) * | 2016-08-31 | 2017-01-04 | 中国船舶重工集团公司第七八研究所 | A kind of superhigh temperature natural gamma shockproof probe |
| CN106567709A (en) * | 2016-09-28 | 2017-04-19 | 中国地质大学（北京） | Downhole while-drilling drilling fluid hydrocarbon content analysis meter |
-
2012
- 2012-10-24 CN CN 201220549920 patent/CN202946149U/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103628869A (en) * | 2013-12-20 | 2014-03-12 | 孙俊佚雄 | Lithology-oriented online natural rock debris gamma logging instrument and logging method thereof |
| CN103628869B (en) * | 2013-12-20 | 2016-03-02 | 孙俊佚雄 | The online GR logging of landwaste towards lithology and logging method thereof |
| CN104373119A (en) * | 2014-10-11 | 2015-02-25 | 中国地质大学（武汉） | While-drilling natural gamma uranium measuring instrument based on rock core drilling |
| CN104373119B (en) * | 2014-10-11 | 2017-03-08 | 中国地质大学（武汉） | A kind of drill-following natural gamma based on core drilling surveys uranium instrument |
| CN105863606A (en) * | 2015-01-19 | 2016-08-17 | 中国石油集团长城钻探工程有限公司 | Natural gamma-ray logging pup joint |
| CN105134201A (en) * | 2015-09-25 | 2015-12-09 | 王佟 | Gamma ray spectrometry log tool |
| CN106285639A (en) * | 2016-08-31 | 2017-01-04 | 中国船舶重工集团公司第七八研究所 | A kind of superhigh temperature natural gamma shockproof probe |
| CN106567709A (en) * | 2016-09-28 | 2017-04-19 | 中国地质大学（北京） | Downhole while-drilling drilling fluid hydrocarbon content analysis meter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130522 |
|
| CX01 | Expiry of patent term |