Method for improving performance of fishing and drilling jars in deviated and extended reach well bores
US6502638B1 · kind B1 · utility
20Cited by
18References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 12, 2000 |
| Grant date | Jan 7, 2003 |
| Priority date | — |
| Expiry date | Oct 20, 2020 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B31/113
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A method for using fishing and drilling jars which require high applied tensile loads in deviated or horizontal well bores is described. The method involves the placement of the string of high frequency vibratory devices that are triggered by flow therethrough. These vibratory devices are placed in the region of the bend or deviation in the well bore. The vibratory forces are applied coincidently with the tensile overpull force so as to fully utilize the applied overpull force at the surface down hole at the jar which is attached to the fish.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.