Method for determining true fracture pressure
US4577689A · kind A · utility
17Cited by
6References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 24, 1984 |
| Grant date | Mar 25, 1986 |
| Priority date | — |
| Expiry date | Aug 24, 2004 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B33/165
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A method for determining true fracture pressure of earth formations disposed below a liner or casing cemented in place comprising the location of an elastomer sealing element cemented in place against the borehole wall at the bottom of the liner or casing and just above the casing shoe so as to prevent annular migration of liquids in the seal interface with the earth formations and to permit true fracture pressure of the formations to be determined.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.