Drilling apparatus and technique using down-hole motor
US3933209A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 1, 1974 |
| Grant date | Jan 20, 1976 |
| Priority date | — |
| Expiry date | Mar 1, 1994 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B4/14
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
The disclosure includes additional features of the apparatus and technique disclosed in Applicant's U.S. Pat. No. 3,854,539 and U.S. Pat. No. 3,874,464. For example, in one embodiment, the anvil is relatively rotatably interconnected with the piston-like member, and is adapted to engage the drill rod for conjoint rotation therewith. Moreover, the inner drill bit has a port in it for discharging the exhaust fluid into the working face of the outer bit from a passage in the anvil. In another embodiment, the anvil includes a core barrel which is adapted to register with the opening in the abutment, when the anvil is engaged with the abutment. The core barrel is defined by a tube which is detachably connected with the main body of the anvil at the relatively forward end thereof. After the tube has been detached from the anvil, the core sample is discharged from the tube through an opening in the relatively rearward end thereof, there being a core catcher means in the tube which is operable to retain the core sample against escape through the relatively forward end thereof. Manipulatively, the additional features include a process for installing an elongated element, such as a tube, in …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.