Pullback system for drilling tool
US11105156B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 31, 2020 |
| Grant date | Aug 31, 2021 |
| Priority date | — |
| Expiry date | Jan 31, 2040 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B7/046
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A pullback device for attaching to a rotary drill bit that has a pair of wrench flats on its base without disassembling or removing the rotary drill bit from a drill string. The pullback device includes an anchoring portion including a collar configured to engage with the wrench flats of the rotary drill bit. The pullback device includes a plurality of arms, each of the plurality of arms having a first end including an attachment location configured to attach product to the pullback device for pullback of the product by the drill string, and each of the arms including a second end opposite the first end, the second end attached to the collar.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.