Process and apparatus for performing gravel-packed liner completions in unconsolidated formations
US5253708A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 11, 1991 |
| Grant date | Oct 19, 1993 |
| Priority date | — |
| Expiry date | Dec 11, 2011 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B43/04
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A process for installing a gravel pack within an unconsolidated hydrocarbonaceous fluid-bearing formation. The process includes the steps of: drilling a bore hole to a first pre-determined depth; installing a well casing in the bore hole; lowering on a pipe string through the bore hole an apparatus for drilling and installing a slotted liner for gravel packing, the apparatus including a drill bit for drilling a pilot hole, means for enlarging the pilot hole to a diameter larger than the internal diameter of the well casing, the pilot hole enlarging means being initially retracted and located within a housing above the pilot hole drill bit, a slotted liner having a first end and a second end, the first end integrally joined to the apparatus above the housing and a drive assembly integrally joined to the second end of the slotted liner; rotating the apparatus to drill a pilot hole through the hydrocarbonaceous fluid producing zone; expanding the initially retracted pilot hole enlarging means upon exceeding the first pre-determined depth; enlarging the pilot hole to a diameter larger than the internal diameter of the well casing; continuing until the first end of the slotted liner rea…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.