Hydraulic and earth engineering – Subterranean or submarine pipe or cable laying – retrieving,... – Repair – replacement – or improvement
Patent
1977-12-15
1980-09-09
Corbin, David H.
Hydraulic and earth engineering
Subterranean or submarine pipe or cable laying, retrieving,...
Repair, replacement, or improvement
175 61, 175 73, 405143, F16L 102
Patent
active
042215030
ABSTRACT:
A method and apparatus is disclosed for installing a large diameter pipe--in the range of 30 inches diameter--for spanning an obstacle, such as a river, along an invert arcuate underground path. An inclined drill rig, having a mud supply system and power pod, includes an angularly inclined ramp and driven car for crowding, without rotation, a pipe either pre-bent to a preselected and constant radius of curvature or a straight pipe into the ground. The pipe at its head includes an articulated drill head, which by appropriate articulation, assures placement of the pipe along a radius of curvature equal to the pre-bent radius of curvature of the pipe. The articulated drilling head includes a hydraulic system for articulating and driving the cutting head and pumping mud and tailing from the pipe path. Two discrete mud systems are used. The first mud system is utilized to entrain and carry away cuttings. The second mud system is combined with a flared skirt about the point of drill head articulation to provide a clean and high lubricity annulus of mud about the advancing drill string. The density of the first mud system can be used to vary the drill string mass, while the density of this second mud system can be used to vary the density of the fluid in which the drill string is buoyantly supported.
REFERENCES:
patent: 2565794 (1951-08-01), Young
patent: 3280923 (1966-10-01), Muench
patent: 3356167 (1967-12-01), Trent
patent: 3465834 (1969-09-01), Southworth
patent: 3589135 (1971-06-01), Ede
patent: 3713500 (1973-01-01), Russell
patent: 3830545 (1974-08-01), Sugden
patent: 3857449 (1974-12-01), Kimura
patent: 3894402 (1975-07-01), Cherrington
patent: 3938597 (1976-02-01), Richmond et al.
patent: 3967463 (1976-07-01), Grandori
patent: 4121673 (1975-07-01), Cherrington
LandOfFree
Drilling method and apparatus for large diameter pipe does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Drilling method and apparatus for large diameter pipe, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Drilling method and apparatus for large diameter pipe will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2222575