CN2139626Y - Eight arm double well diameter measuring instrument - Google Patents
Eight arm double well diameter measuring instrument Download PDFInfo
- Publication number
- CN2139626Y CN2139626Y CN92220446U CN92220446U CN2139626Y CN 2139626 Y CN2139626 Y CN 2139626Y CN 92220446 U CN92220446 U CN 92220446U CN 92220446 U CN92220446 U CN 92220446U CN 2139626 Y CN2139626 Y CN 2139626Y
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- CN
- China
- Prior art keywords
- hole diameter
- caliper
- well
- well diameter
- diameter leg
- 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.)
- Expired - Lifetime
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Abstract
The utility model provides an eight-arm double-well diameter-measuring device, which comprises a resistor-type single-well diameter-measuring device. The utility model is characterized in that upper and lower two resistor-type single-well diameter-measuring devices can be arranged coaxially, and the horizontal projection of four well diameter legs which are distributed in 90 DEG with one another and are owned by self can be overlapped. Two measured well diameter curves can improve the calculation accuracy of the cement dosage for a fixed well by using the eight-arm double-well diameter-measuring device, and the formation pressure of a drilled sandstone reservoir bed in new well drilling can be judged visually or can be calculated further according to the thickness of the cement cake on the well wall of the sandstone reservoir bed. The problem that the predication of the formation pressure is not exact or complete can be solved.
Description
The utility model relates to engineering log instrument in a kind of geophysics field.
The on-the-spot at present resistor caliper that uses is still continued to use the technology of introducing from the former Soviet Union fifties, it has the leg of four cylinder shape belt spring tensions, when borehole measurement, hole diameter leg tip is overlayed on the borehole wall under the effect of spring tension, the stretching degree of leg changes with the hole diameter size variation, the variation of hole diameter leg changes the potential difference at variable resistor two ends, the variation of potential difference is sent in the ground instrument notes, Here it is CAL, but, because the most advanced and sophisticated contact area size with the borehole wall of its spring tension and cylindrical hole diameter leg is not considered the compressive strength of mud cake on the borehole wall to the pressure that the borehole wall constituted, make this instrument when borehole measurement, in the incision mud cake in various degree of hole diameter leg tip, make a CAL of being surveyed fail the hole diameter value of different depth in the real observation well, the MDIA value of obtaining with it is calculated the cementing concrete consumption and will certainly be caused certain error, and can not accurately judge cake thickness on the sandstone reservoir borehole wall with this CAL.
The purpose of this utility model be to provide a kind of on instrument basis, resistance-type individual well footpath the two calipers of improved eight arms.
The purpose of this utility model is to realize like this, that is: the two calipers of this eight arms comprise the single caliper of resistance-type, key is the coaxial installation of the single caliper of upper and lower two resistance-types, and making it, all separately four of 90 ° of distributions hole diameter leg horizontal projections are overlapping each other each other.
Four hole diameter legs of the described caliper that places an order link by steel wire and last hole diameter leg fixed disk, and each the hole diameter leg lower end of the caliper that places an order and the contact portion of the borehole wall are a flat fillet body.Described each the hole diameter leg lower end of single caliper and the contact portion of the borehole wall are a curved body.Like this, increased the contact area of each the hole diameter leg lower end of last single caliper and the borehole wall, reduce the contact area of place an order each the hole diameter leg lower end of caliper and the borehole wall, respectively the spring tension of each hole diameter leg of single caliper has up and down been done restriction accordingly again, make each hole diameter leg lower end of single caliper be lower than the compressive strength of mud cake slightly to the pressure of the borehole wall, each the hole diameter leg lower end of caliper that places an order to the pressure of the borehole wall then greater than the compressive strength of mud cake.Like this, when in well, measuring, each hole diameter leg lower end of single up and down caliper can be adjacent to the mud cake borehole wall and the rock stratum borehole wall respectively, makes two CALs being surveyed reflect the hole diameter value of the different depth of the mud cake and the rock stratum borehole wall respectively, and measures the cake thickness on the sandstone reservoir borehole wall thus.
The utility model compared with prior art, because this measured CAL has not only improved the accuracy that the cementing concrete consumption calculates, the more important thing is thickness according to mud cake on the sandstone reservoir borehole wall, can judge or further calculate the strata pressure that bores circuitous sandstone reservoir in the stepout well intuitively, basically solved for a long time and bored encrypted adjustment well to the strata pressure forecasting inaccuracy at oil gas field, infull technical barrier, and will change the at present on-the-spot caliper that uses only survey one neither the perfect representation mud cake borehole wall neither perfect representation rock stratum borehole wall hole diameter value the situation of CAL.Present oil gas field is bored the safety drilling that well is adjusted in exploitation, improve cementing quality, reduce oil layer pollution, aspect such as reduce production costs will play an important role.
Concrete structure of the present utility model is provided by the following drawings:
Fig. 1 is a fundamental diagram of the present utility model;
Fig. 2 is an overall construction drawing of the present utility model;
Fig. 3 is Fig. 2 A portion rotation enlarged drawing, and this figure has mainly expressed the contour structures of the hole diameter leg of last single caliper;
Fig. 4 is Fig. 2 B portion enlarged drawing, and this figure has mainly expressed the contour structures of the hole diameter leg of the caliper that places an order.
Hereinafter with reference to accompanying drawing concrete structure of the present utility model is further described.
Referring to Fig. 1-4, the two calipers of the utility model eight arms comprise the single caliper of resistance-type, and its key is the coaxial installation of the single caliper of upper and lower two resistance-types, and making it, all separately four of 90 ° of distributions hole diameter leg horizontal projections are overlapping each other each other.
Going up four the hole diameter leg lower ends of single caliper and the contact portion of the borehole wall is the curved body 3 of an isosceles trapezoidal shape, the top of this curved body is a ramped shaped 2 with connecting of cylindrical hole diameter leg main body, and connect with hole diameter leg main body by the screw thread on it, for its curved body 3 and the borehole wall are coincide better, 3 of hole diameter leg body extending line and curved bodies have an angle, and it is fixed that the size of its angle is come by the size of bit diameter.
Place an order each the hole diameter leg lower end of caliper and the borehole wall contact portion as shown in Figure 4, its cross section is the flat fillet body 6 of a trapezoidal shape, it is connected with hole diameter leg main body by the screw thread on it.
Each the hole diameter leg lower end of caliper that places an order is to go up each hole diameter leg lower end of single caliper 2～3 times to borehole wall elastic force to the elastic force of the borehole wall.
Two caliper each the hole diameter leg in the process of going into the well of eight arms are closure state, and four hole diameter legs of each of its upper and lower single caliper do not hold 4,6 by the hole diameter leg that hole diameter leg fixed disk 7,11 blocks upper and lower single caliper respectively respectively; The hole diameter leg fixed disk 7 of going up single caliper is upwards pushed up by spring 8, block four hole diameter legs, and this hole diameter leg fixed disk 7 is also coupled together with each the hole diameter leg of caliper that places an order by the fixing hole 10 that a steel wire 9 passes on the caliper joint pin that places an order, after this instrument arrives the shaft bottom, placing an order each open while of hole diameter leg of caliper, the steel wire 9 that is connected in the hole diameter leg fixed disk 7 of single caliper and places an order between each leg of caliper is left behind from the hole diameter leg fixed disk 7 of being about to go up single caliper, and each leg of single caliper is also opened simultaneously.
Claims (4)
1, the two calipers of a kind of eight arms comprise the single caliper of resistance-type, it is characterized in that the coaxial installation of the single caliper of upper and lower two resistance-types, and making it, all separately four of 90 ° of distributions hole diameter leg horizontal projections are overlapping each other each other.
2, according to the two calipers of described eight arms of claim 1, four hole diameter legs of the caliper that it is characterized in that placing an order link by steel wire 9 and last hole diameter leg fixed disk 7.
3, according to the two calipers of described eight arms of claim 1, the contact portion of it is characterized in that placing an order each the hole diameter leg lower end of caliper and the borehole wall is a flat fillet body 6.
4, described according to claim 1 is the two calipers of eight arms, it is characterized in that each the hole diameter leg lower end of single caliper and the contact portion of the borehole wall are a curved body 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN92220446U CN2139626Y (en) | 1992-09-29 | 1992-09-29 | Eight arm double well diameter measuring instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN92220446U CN2139626Y (en) | 1992-09-29 | 1992-09-29 | Eight arm double well diameter measuring instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2139626Y true CN2139626Y (en) | 1993-08-04 |
Family
ID=33767481
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN92220446U Expired - Lifetime CN2139626Y (en) | 1992-09-29 | 1992-09-29 | Eight arm double well diameter measuring instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2139626Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102337884A (en) * | 2011-09-29 | 2012-02-01 | 西安思坦仪器股份有限公司 | High-precision downhole electromagnetic thickness-measuring caliper |
| CN102418540A (en) * | 2011-12-01 | 2012-04-18 | 中国煤炭科工集团太原研究院 | Hydraulic eight-arm anchor rod drill carriage for coal mine |
| CN104975846A (en) * | 2015-07-21 | 2015-10-14 | 胡显三 | Hole diameter logging device |
| EP3835544A1 (en) * | 2019-12-12 | 2021-06-16 | Services Pétroliers Schlumberger | Modular borehole imaging apparatus and methods |
| US11661840B2 (en) | 2019-12-12 | 2023-05-30 | Schlumberger Technology Corporation | Multi-finger caliper |
-
1992
- 1992-09-29 CN CN92220446U patent/CN2139626Y/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102337884A (en) * | 2011-09-29 | 2012-02-01 | 西安思坦仪器股份有限公司 | High-precision downhole electromagnetic thickness-measuring caliper |
| CN102337884B (en) * | 2011-09-29 | 2014-07-23 | 西安思坦仪器股份有限公司 | High-precision downhole electromagnetic thickness-measuring caliper |
| CN102418540A (en) * | 2011-12-01 | 2012-04-18 | 中国煤炭科工集团太原研究院 | Hydraulic eight-arm anchor rod drill carriage for coal mine |
| CN102418540B (en) * | 2011-12-01 | 2014-04-02 | 中国煤炭科工集团太原研究院 | Hydraulic eight-arm anchor rod drill carriage for coal mine |
| CN104975846A (en) * | 2015-07-21 | 2015-10-14 | 胡显三 | Hole diameter logging device |
| EP3835544A1 (en) * | 2019-12-12 | 2021-06-16 | Services Pétroliers Schlumberger | Modular borehole imaging apparatus and methods |
| EP4036369A3 (en) * | 2019-12-12 | 2022-12-07 | Services Pétroliers Schlumberger | Modular borehole imaging methods |
| US11555395B2 (en) | 2019-12-12 | 2023-01-17 | Schlumberger Technology Corporation | Modular borehole imaging apparatus and methods |
| US11661840B2 (en) | 2019-12-12 | 2023-05-30 | Schlumberger Technology Corporation | Multi-finger caliper |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |