Liquid-filled collar for tool string

Details Liquid-filled collar for tool string Liquid-filled collar for tool string

1985-07-18

1986-12-09

Novosad, Stephen J.

Boring or penetrating the earth

With tool shaft detail

175 61, 166242, E21B 1716

Patent

active

046275029

ABSTRACT:
A liquid-filled collar for applying weight to the nether end of a tool string which is to be used in a wellbore filled with wellbore liquid. The collar has an annulus formed between inner and outer conduits which annulus is at least partially filled with a dense liquid having a density greater than that of the wellbore liquid. The annulus is open at the top to the wellbore liquid so that the head of the wellbore liquid acts on the head of the dense liquid in the annulus to exert a force on the bottom closure of the annulus to produce a downward force greater than the upward buoyant force of the wellbore liquid. Low density liquid having a density less than the wellbore liquid can fill a portion of the annulus below the dense liquid to provide buoyancy for the collar when used in horizontal wellbores.

REFERENCES:
patent: 2814462 (1957-11-01), De Jarnett
patent: 3179188 (1965-04-01), De Jarnett
patent: 3265091 (1966-08-01), De Jarnett

Affiliated with

Also associated with

Rating

Liquid-filled collar for tool string does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Liquid-filled collar for tool string, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Liquid-filled collar for tool string will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1380844