Balanced or underbalanced drilling method and apparatus

Details Balanced or underbalanced drilling method and apparatus Balanced or underbalanced drilling method and apparatus

1997-03-03

1999-02-02

Neuder, William

Boring or penetrating the earth

Processes

Boring with specific fluid

175205, F21B 718

Patent

active

058652612

ABSTRACT:
A casing or tubing segment or segments are disclosed which can be used to create a parasite annulus during drilling. The cased wellbore receives a string containing valves and the drillstring operates through it. As the mud circulates, the segments of the tubing or casing provide communication at various depths from the parasite annulus (i.e., the outermost annulus) into the circulating mud, which is the innermost annulus. Each valve is adjustable to alter the amount of differential pressure required in order to open it. The valves are also in hydraulic pressure balance so that only the pressure added by the injected gas acts to open them. The valves close by a spring bias.

REFERENCES:
patent: 1324304 (1919-12-01), Carmichael
patent: 1479064 (1924-01-01), Gracey
patent: 2855952 (1958-10-01), Tausch et al.
patent: 3244234 (1966-04-01), Flickinger
patent: 3381756 (1968-05-01), Regan
patent: 3398760 (1968-08-01), Fox et al.
patent: 3407830 (1968-10-01), Regan
patent: 3583481 (1971-06-01), Vernotzy
patent: 3958639 (1976-05-01), Daniel
patent: 4257484 (1981-03-01), Whitley et al.
patent: 4398555 (1983-08-01), Taylor
patent: 4602684 (1986-07-01), Van Wormer et al.
patent: 4681372 (1987-07-01), McClure
patent: 5249635 (1993-10-01), King et al.
patent: 5407020 (1995-04-01), Beavers
patent: 5411105 (1995-05-01), Gray
patent: 5531507 (1996-07-01), Jackson

Affiliated with

Also associated with

Rating

Balanced or underbalanced drilling method and apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Balanced or underbalanced drilling method and apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Balanced or underbalanced drilling method and apparatus will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1109058