Rotary earth boring tool

Details Rotary earth boring tool Rotary earth boring tool

1980-11-17

1983-09-27

Purser, Ernest R.

Boring or penetrating the earth

With below-ground tool drive prime mover

Fluid rotary type

175 94, 173159, 1510412, 415502, E21B 400

Patent

active

044063326

ABSTRACT:
The present invention provides a nonstalling system for advancing a boring tool in situations where the inclination of the bore hole with respect to the vertical is such that the force of gravity does not provide effective forward thrust. A hydraulically powered marine screw propeller adjacent the boring tool provides the necessary thrust for the drilling operation. Pressurized drilling fluid provides the required hydraulic energy. The characteristics of the marine screw propeller are such that it provides maximum thrust at maximum rotative speed but should the tool stall the forward thrust drops to zero preventing stalling.

REFERENCES:
patent: 79695 (1868-07-01), Spaulding
patent: 2251916 (1941-08-01), Cross
patent: 3047079 (1962-07-01), Wepsala
patent: 3372763 (1968-03-01), Fischer
patent: 3786875 (1974-01-01), Merle
patent: 4050849 (1977-09-01), Sheets
patent: 4185704 (1980-01-01), Nixon
patent: 4319649 (1982-03-01), Jetter
Boice et al., The Design and Performance Characteristics of Aluminum Drill Pipe, JPT Dec. 1968, pp. 1285-1291.

Affiliated with

Also associated with

Rating

Rotary earth boring tool does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Rotary earth boring tool, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Rotary earth boring tool will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2126110