Patent · US Active

Coiled tubing injector with limited slip chains

US9151122B2 · kind B2 · utility

0Cited by

57References

6Claims

0Family size

Assignee

National Oilwell Varco, L.P. · US

Inventors

David W. McCulloch · Arlington, US
Timothy S. Steffenhagen · Fort Worth, US
William B. White · Bedford, US
William G. Stewart · Pennington, US

Key dates

Filing date	Aug 29, 2013
Grant date	Oct 6, 2015
Priority date	—
Expiry date	Aug 29, 2033

Classification

Technology area (CPC E)Fixed Constructions
CPC primaryE21B19/22
WIPO fieldCivil engineering
WIPO sectorOther fields

Abstract

A coiled tubing injector comprises a drive system for independently driving a plurality of chains independently but otherwise retarding relative motion between the driven chains when a chain begins to slip uncontrollably.

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