Patent · US Expired

Device for guiding a drilling string during underwater drilling

US4053022A · kind A · utility

15Cited by

6References

13Claims

0Family size

Assignee

Entreprise de Recherches et d'Activities Petrolieres (E.R.A.P.) · FR

Inventor

Georges Mercier · Annonay, FR

Key dates

Filing date	Jun 25, 1975
Grant date	Oct 11, 1977
Priority date	—
Expiry date	Jun 25, 1995

Classification

Technology area (CPC E)Fixed Constructions
CPC primaryE21B19/004
WIPO fieldCivil engineering
WIPO sectorOther fields

Abstract

Device for guiding a drilling string from a floating drilling rig comprises a flexible guide tube having an inner diameter which is constant and an outer diameter which decreases progressively from its median zone toward each end, the median zone being connected by swivel means to lateral and longitudinal members connected to the floating drilling rig. This device is especially adapted for floating drilling rigs having a well through which the string descends.

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