GB656941A - Apparatus for temporarily sealing bore holes - Google Patents
Apparatus for temporarily sealing bore holesInfo
- Publication number
- GB656941A GB656941A GB1006/49A GB100649A GB656941A GB 656941 A GB656941 A GB 656941A GB 1006/49 A GB1006/49 A GB 1006/49A GB 100649 A GB100649 A GB 100649A GB 656941 A GB656941 A GB 656941A
- Authority
- GB
- United Kingdom
- Prior art keywords
- sleeve
- rod
- latches
- fluid
- housing
- 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
Links
- 238000007789 sealing Methods 0.000 title abstract 2
- 239000012530 fluid Substances 0.000 abstract 4
- 239000008188 pellet Substances 0.000 abstract 3
- 241001449342 Chlorocrambe hastata Species 0.000 abstract 1
- 230000015572 biosynthetic process Effects 0.000 abstract 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
- 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
- E21B49/08—Obtaining fluid samples or testing fluids, in boreholes or wells
- E21B49/084—Obtaining fluid samples or testing fluids, in boreholes or wells with means for conveying samples through pipe to surface
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
656,941. Well packers ; formation testers. STANDARD OIL DEVELOPMENT CO. Jan. 13, 1949, No. 1006. Convention date, April 23, 1948. [Class 85] A well packer which is modified to take fluid samples from particular strata of a borehole comprises a flexible sleeve 4 having a pervious centre portion 10, the sleeve 4 being secured in a fluid-tight manner at the upper end to a tubular housing 6 positioned on a drill stem 2 and at the lower end to a rod 5 which extends upwards into the housing 6. The space between the sleeve 4 and the rod 5 is completely filled with pellets 18. The spear-head upper end of the rod 6 is provided with spring-biased latches 8 that can engage with projections 9 formed in the housing 6. When required for use the latches are pressed inwards when the assembly is at the surface and the weight of the rod 5, the sleeve 4 and pellets 18 is sufficient to hold the rod in a position where the latches are below the projections 9. The tool is then lowered into the well until the permeable section 10 of the sleeve 4 is adjacent the strata 11 from which it is desired to obtain a test sample of fluid, and the rod 5 is drawn upwards by a suitable tool lowered through the drill stem so that the sleeve is contracted in length, but since its volume remains unaltered, it is forced into sealing engagement with the sides of the bore whilst the latches engage the projections 9 so holding the sleeve in this position. Fluid pressure is reduced in the drill stem and fluid from the strata 11 percolates through the permeable section 10 of the sleeve and the pellets to pass through openings 16 in the rod 5 and so upwards through the rod past the non-return valve 14 and out through ports 15 in the housing 6 into the drill stem. To release the assembly a weighted sleeve is lowered down the stem to release the latches so allowing the packer to be elongated with subsequent diminution of cross section. The pressure in the bore above and below the packer is equalized when the sleeve engages the borehole walls, since there is a byepass formed by chamber 7, telescopic tube 30 and port 12.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US656941XA | 1948-04-23 | 1948-04-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB656941A true GB656941A (en) | 1951-09-05 |
Family
ID=22064475
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1006/49A Expired GB656941A (en) | 1948-04-23 | 1949-01-13 | Apparatus for temporarily sealing bore holes |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB656941A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2333310A (en) * | 1998-01-20 | 1999-07-21 | Smith International | Inflatable packer with below packer pressure relief means |
-
1949
- 1949-01-13 GB GB1006/49A patent/GB656941A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2333310A (en) * | 1998-01-20 | 1999-07-21 | Smith International | Inflatable packer with below packer pressure relief means |
| GB2333310B (en) * | 1998-01-20 | 2002-06-19 | Smith International | Inflatable packer |
| US6431273B1 (en) | 1998-01-20 | 2002-08-13 | Smith International Inc. | Inflatable packer |
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