Method for prudent penetration of a casing through sensible over

Details Method for prudent penetration of a casing through sensible over Method for prudent penetration of a casing through sensible over

1986-06-02

1988-08-23

Novosad, Stephen J.

Boring or penetrating the earth

Processes

Boring with specific fluid

175385, 175393, 175257, E21B 1026, E21B 1060, E21B 2100

Patent

active

047654163

ABSTRACT:
In a subterranean drilling operation, a drill stem and drill bit are advanced downwardly while conducting compressed air downwardly through the drill stem. A minor part of the air flow is discharged from the drill bit downwardly against the sensible overburden, and a major part of the air flow is discharged upwardly through passages in the drill stem. A casing is disposed around the drill stem and advanced therewith so that the sensible overburden is shielded from the air discharged from the upwardly directed passages. The upwardly directed passages contain removable inserts which can be exchanged for different inserts in order to vary the amount of air discharged from the upwardly directed passages, and thereby vary the amount of air discharged downwardly from the drill bit against the overburden. In that way, the amount of air acting against the overburden can be adapted to the type of material in the overburden in order to control the amount of disruption to the overburden.

REFERENCES:
patent: 2765146 (1956-10-01), Williams, Jr.
patent: 2805043 (1957-09-01), Williams, Jr.
patent: 2807443 (1957-09-01), Wyman
patent: 3011547 (1961-12-01), Holbert et al.
patent: 3011571 (1961-12-01), De Bree et al.
patent: 4043409 (1977-08-01), Walter
patent: 4222447 (1980-09-01), Cholet
patent: 4610321 (1986-09-01), Whaling

Affiliated with

Also associated with

Rating

Method for prudent penetration of a casing through sensible over 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 for prudent penetration of a casing through sensible over, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for prudent penetration of a casing through sensible over will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-831123