CN2035381U - Magnetic positioning ring for petroleum sleeve - Google Patents
Magnetic positioning ring for petroleum sleeve Download PDFInfo
- Publication number
- CN2035381U CN2035381U CN88216910U CN88216910U CN2035381U CN 2035381 U CN2035381 U CN 2035381U CN 88216910 U CN88216910 U CN 88216910U CN 88216910 U CN88216910 U CN 88216910U CN 2035381 U CN2035381 U CN 2035381U
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- CN
- China
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- magnetic
- depth
- sleeve
- utility
- model
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- Geophysics And Detection Of Objects (AREA)
Abstract
The utility model relates to a magnetic locating ring used for confirming the position of a perforation in the petroleum mine geophysical well-logging. The utility model can accurately display the position of the depth of the perforation instead of a short jacket tube of 1m going down to the oil well in the prior art. The utility model can not only save the jacket tube, but also serve as a marker of the jacket tube depth with exact locating to assure the accuracy of the depth of the perforation, and can be widely used for the well drilling process of the oilfield geological exploration.
Description
The utility model belongs to oilfield geophysical log technical field, particularly relates to a kind of mark of determining the perforating depth position with magnetic localizer.
In order to improve order of accuarcy, to locate a certain casing coupling occurs on the oil gas interval that log write down strong magnetic spiking mark with magnetic during perforation as perforating depth to the oil-gas Layer perforating depth.Because API(American Petroleum Institute (API)) so the casing length difference of standard changes little, the spacing intensity of variation of strong magnetic spiking of observing its casing coupling from log is not obvious, in order to address this problem, the normal employing in short sleeve pipe (the 1 meter long sleeve pipe) lower going-into-well of a length just obtained the optimum efficiency that strong magnetic spiking spacing shortens suddenly.
This method has two shortcomings: the one, and the material waste, short sleeve mark as used one meter length will be changed a social system with long sleeve pipe, remaining part just can not play the effect of special-purpose tubing, and both having used the sleeve pipe of one meter length of typing specification also is uneconomic as the magnetic mark; The 2nd, the casing threads machining accuracy is difficult for guaranteeing, is easy to generate leakage when cooperating with the casing coupling box.
The purpose of this utility model is exactly to overcome the shortcoming that prior art exists and a kind of sleeve pipe magnetic locating ring that designs.It can remove short sleeve in bunch tube, can locate in magnetic again and record significant casing coupling sign on the log.
Its principle is in API normal sleeve box cupling, because two sleeve body screw thread end faces have standard clearance, can in well logging, produce strong magnetic spiking, as long as a steel annulus (being the magnetic locating ring) is embedded in the gap, on the magnetic auditory localization cues, the strong magnetic spiking of this box cupling just significantly goes on record, thereby plays the sign positioning action of perforating depth.
Peak-to-peak signal weakens along with sleeve body screw thread end face slit reduces degree and weakens gradually between the strong magnetic of casing coupling.
The utility model is achieved in that
To scheme is that example is illustrated:
When the sleeve pipe (1) that is arranged in the needs demarcation oil-gas Layer degree of depth is seated on the well head rotating disk, magnetic locating ring (2) is put into box cupling (3) (promptly being seated on the sleeve body screw thread end face (4)), insert again in another root sleeve pipe (5) lower going-into-well.When carrying out the well logging of magnetic location, this box cupling (3) position shown signal honeybee value on the magnetic orientation curve will obviously reduce, and this peak value can be decided to be the reservoir depth of being demarcated.This encircles the annulus that available API sleeve pipe processing is grown into 1-10 centimetre.Magnetic locating ring material can be manufactured with the API normal sleeve, and its external surface fineness will reach
The form tolerance of 3 concentricitys: ± 0.5 millimeter.
Advantage of the present utility model:
1, the magnetic positioning ring process technology is simple;
When 2, inlaying in casing coupling, operation is simple;
3, overcome the low precision that no special equipment processing short sleeve screw thread is brought, caused the weakness of screw thread sealing difference.
4, be applicable to the sleeve pipe of virtually any size;
5, remarkable in economical benefits.Calculate with China National Petroleum Corporation's intact 6790 mouthfuls of wells in 1987.The saving sleeve pipe was amounted to 5,100,000 yuan of RMB for 1960 tons in 1 year.
Present technique is applicable to the located perforating skill of oil, coalfield, the hydrology, geological drilling.
Claims (3)
1, employed down-hole depth mark thing during a kind of oilfield geophysical log is characterized in that this mark places the magnetic locating ring 2 of oil well inner sleeve box cupling position to form by one.
2, mark according to claim 1 is characterized in that the material of this ring is to make of beautiful API normal sleeve, and fineness is
3, the form tolerance of concentricity ± 0.5 millimeter.
3, mark according to claim 1 is characterized in that this thing is embedded between the screw thread end clearance of two sleeve body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN88216910U CN2035381U (en) | 1988-09-22 | 1988-09-22 | Magnetic positioning ring for petroleum sleeve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN88216910U CN2035381U (en) | 1988-09-22 | 1988-09-22 | Magnetic positioning ring for petroleum sleeve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2035381U true CN2035381U (en) | 1989-04-05 |
Family
ID=4849492
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN88216910U Withdrawn CN2035381U (en) | 1988-09-22 | 1988-09-22 | Magnetic positioning ring for petroleum sleeve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2035381U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102182448A (en) * | 2011-04-19 | 2011-09-14 | 中国石油化工集团公司 | Orientated measurement guiding butt joint device |
-
1988
- 1988-09-22 CN CN88216910U patent/CN2035381U/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102182448A (en) * | 2011-04-19 | 2011-09-14 | 中国石油化工集团公司 | Orientated measurement guiding butt joint device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C15 | Extension of patent right duration from 15 to 20 years for appl. with date before 31.12.1992 and still valid on 11.12.2001 (patent law change 1993) | ||
| RN01 | Renewal of patent term | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |