Remotely operated water bottom based drilling system using...

Details Remotely operated water bottom based drilling system using... Remotely operated water bottom based drilling system using...

E - Fixed Constructions

21

B

E21B 7/124 (2006.01)

Patent

CA 2687232

A method for drilling formations below the bottom of a body of water includes disposing a drilling system on the bottom of the body of water. The formations are drilled by rotating a first drill rod having a first core barrel latched therein and advancing the drill rod longitudinally. At a selected longitudinal position, an upper end of the first drill rod is opened and a cable having a latching device at an end thereof is lowered into the first drill rod. The winch is retracted to retrieve the first core barrel. The first core barrel is laterally displaced from the first drill rod. A second core barrel is inserted into the first drill rod and latched therein. A second drill rod is affixed to the upper end of the first drill rod. Drilling the formation is then resumed by longitudinally advancing and rotating the first and second drill rods.

L'invention concerne un procédé de forage de formations sous le fond d'un corps d'eau comprenant la disposition d'un système de forage sur le fond du corps d'eau. Les formations sont forées par la rotation d'une première tige de forage ayant un premier tube carottier verrouillé à l'intérieur et l'avancée longitudinale de la tige de forage. A une position longitudinale sélectionnée, une extrémité supérieure de la première tige de forage est ouverte et un câble comportant un dispositif de verrouillage à une de ses extrémités est abaissé dans la première tige de forage. Le treuil auxiliaire est rétracté pour récupérer le premier tube de carottier. Le premier tube de carottier est déplacé latéralement à partir de la première tige de forage. Un second tube carottier est inséré dans la tige de forage et verrouillé à l'intérieur. Une seconde tige de forage est fixée à l'extrémité supérieure de la première tige de forage. Le forage de la formation est alors repris par une avancée longitudinale et une rotation des première et seconde tiges de forage.

Affiliated with

Also associated with

Rating

Remotely operated water bottom based drilling system using... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Remotely operated water bottom based drilling system using..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Remotely operated water bottom based drilling system using... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-1789600