ES404183A1 - A procedure for drilling a polling point. (Machine-translation by Google Translate, not legally binding) - Google Patents
A procedure for drilling a polling point. (Machine-translation by Google Translate, not legally binding)Info
- Publication number
- ES404183A1 ES404183A1 ES404183A ES404183A ES404183A1 ES 404183 A1 ES404183 A1 ES 404183A1 ES 404183 A ES404183 A ES 404183A ES 404183 A ES404183 A ES 404183A ES 404183 A1 ES404183 A1 ES 404183A1
- Authority
- ES
- Spain
- Prior art keywords
- drilling
- shale
- adsorption
- borehole
- translation
- 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
- 238000005553 drilling Methods 0.000 title abstract 7
- 238000000034 method Methods 0.000 title abstract 2
- 239000012530 fluid Substances 0.000 abstract 4
- 238000001179 sorption measurement Methods 0.000 abstract 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 3
- 239000007864 aqueous solution Substances 0.000 abstract 2
- 229920000642 polymer Polymers 0.000 abstract 2
- 229910001508 alkali metal halide Inorganic materials 0.000 abstract 1
- 150000008045 alkali metal halides Chemical class 0.000 abstract 1
- 230000007062 hydrolysis Effects 0.000 abstract 1
- 238000006460 hydrolysis reaction Methods 0.000 abstract 1
- 230000003993 interaction Effects 0.000 abstract 1
- 229920002401 polyacrylamide Polymers 0.000 abstract 1
- 239000000243 solution Substances 0.000 abstract 1
Landscapes
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Abstract
A method for drilling a borehole encountered with a water-sensitive shale, drilling the borehole by the action of a drilling medium and circulating a drilling fluid which comprises initially circulating as drilling fluid a substantially clear transparent fluid, of relatively low density; when the confrontation with the instability of the borehole due to the interaction of the water with the water-sensitive shale is at least imminent, circulate as a drilling fluid an aqueous solution that (a) contains a partially hydrolyzed polyacrylamide whose degree of hydrolysis is comprised between 20 and 50% has a molecular weight greater than 1 million, and is present in an amount at least sufficient to satisfy the minimum requirements of adsorption of the shale, and (b) contains an amount of alkali metal halide which is at least sufficient to improve the adsorption of the polymer on the shale, said aqueous solution being circulated in such a way that the shale is brought into contact with the solution and stabilized by adsorption of the polymer. (Machine-translation by Google Translate, not legally binding)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ES404183A ES404183A1 (en) | 1972-06-23 | 1972-06-23 | A procedure for drilling a polling point. (Machine-translation by Google Translate, not legally binding) |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ES404183A ES404183A1 (en) | 1972-06-23 | 1972-06-23 | A procedure for drilling a polling point. (Machine-translation by Google Translate, not legally binding) |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| ES404183A1 true ES404183A1 (en) | 1975-06-01 |
Family
ID=8461534
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ES404183A Expired ES404183A1 (en) | 1972-06-23 | 1972-06-23 | A procedure for drilling a polling point. (Machine-translation by Google Translate, not legally binding) |
Country Status (1)
| Country | Link |
|---|---|
| ES (1) | ES404183A1 (en) |
-
1972
- 1972-06-23 ES ES404183A patent/ES404183A1/en not_active Expired
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