Method and system for displacing drilling fluid from a drill str

Details Method and system for displacing drilling fluid from a drill str Method and system for displacing drilling fluid from a drill str

1984-04-16

1986-03-25

Novosad, Stephen J.

Boring or penetrating the earth

With signaling, indicating, testing or measuring

175 65, 175212, 175217, 175218, E21B 1900, E21B 2110, E21B 4704

Patent

active

045777004

ABSTRACT:
A rotary well drilling system employs a drill string with a drill bit affixed at its lower end for the drilling of a borehole. Drilling fluid is circulated through the drill string to remove drill cuttings. To break out a section of drill pipe from the drill string, the drill string is raised to a point where the drill string joint to be broken is above the drilling rig floor. Compressed gas is injected into the drill string to displace the column of drilling fluid to a level below such drill string joint. The compressed gas is vented and the drill pipe is broken out of the drill string.

REFERENCES:
patent: 2120132 (1938-06-01), Hawkins
patent: 2595715 (1952-05-01), Sloan
patent: 3053330 (1962-09-01), Arthur
patent: 3889959 (1975-06-01), Persson
patent: 4162473 (1979-07-01), Utasi
patent: 4315553 (1982-02-01), Stallings

Affiliated with

Also associated with

Rating

Method and system for displacing drilling fluid from a drill str does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and system for displacing drilling fluid from a drill str, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and system for displacing drilling fluid from a drill str will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-625523