Dynamic inwardly eccentrically-placed directional drill bit type rotation guidance apparatus
US10233694B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 23, 2015 |
| Grant date | Mar 19, 2019 |
| Priority date | — |
| Expiry date | Jul 25, 2035 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B34/06
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A rotation guidance apparatus belonging to the technical field of oil drilling equipment. An end part of a lower connector has a ball-socketed ball-joint rod, and a drill bit is connected to the ball-socketed ball-joint rod. Several circumferentially and evenly distributed piston holes are provided in a side wall of the lower connector, wherein a piston matches each piston hole and a piston rod connected to the piston is movably connected to the ball-socketed ball-joint rod. An eccentrically-placed valve core is connected to a controller provided in an upper connector, wherein a working face of the eccentrically-placed valve core is opposite to the piston holes and rotation of the eccentrically-placed valve core makes the pistons in the piston holes move to control the rotation guidance of the ball-socketed ball-joint rod.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.