Patent · US Active

Drilling tool

US10557307B2 · kind B2 · utility

0Cited by

9References

20Claims

0Family size

Assignee

WELLTEC A/S · DK

Inventors

Tomas Sune Andersen · Zug, CH
Sven Karsten Jensen · Randers, DK

Key dates

Filing date	Sep 9, 2014
Grant date	Feb 11, 2020
Priority date	—
Expiry date	Dec 29, 2034

Classification

Technology area (CPC E)Fixed Constructions
CPC primaryE21B23/001
WIPO fieldCivil engineering
WIPO sectorOther fields

Abstract

Drilling tool (1) for drilling openings in a cement ballast tank (3) of an oil rig in order to gain access to an internal space in the ballast tank comprising an electrical motor (6) driving a first shaft (7); a pump (8) driven by the motor for pumping well fluid in through an inlet (9) and out through an outlet (10); a gear (11) driven by the first shaft extending through the pump for reducing rotation of a second shaft (12); and a drilling head (14) having bits and at least one drilling head fluid channel and being driven by the second shaft (12), the outlet of the pump being fluidly connected with the fluid channel to pump well fluid out through the fluid channel.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.