Pipe joints or couplings – With assembly means or feature – Guide and support
Patent
1978-03-27
1981-06-23
Arola, Dave W.
Pipe joints or couplings
With assembly means or feature
Guide and support
29450, 285133A, 285134, 285276, 285304, 175173, 285305, F16L 3500
Patent
active
042746639
ABSTRACT:
Multiple wall drill pipe adapted for use in a drill pipe string comprising an outer pipe member; an inner pipe member disposed within the outer pipe member; and means for releasably connecting the inner pipe member and the outer pipe member in fixed axial relationship under force loads applied in use during a drilling operation while enabling relative rotary movement between the inner pipe member and the outer pipe member during a rotary drilling operation to relieve torsional stress thereon, and for permitting the removal of the inner pipe member from the outer pipe member by relative axial displacement therebetween caused by application to the inner pipe member of only an axially directed force load in excess of the axially directed force loads applied to the inner pipe member in use during a normal drilling operation.
REFERENCES:
patent: 1547461 (1925-07-01), Steele
patent: 1909075 (1933-05-01), Ricker et al.
patent: 2413106 (1946-12-01), Kelle
patent: 2850264 (1958-09-01), Gruble
patent: 3208539 (1965-09-01), Henderson
patent: 3487534 (1970-01-01), Schustack
patent: 3502353 (1970-03-01), Burns
patent: 3503636 (1970-03-01), Bower
patent: 3552778 (1971-01-01), Muller
patent: 3638970 (1972-02-01), Sandquist
patent: 3664441 (1972-05-01), Carey
patent: 4070043 (1978-01-01), Becker
Becker Floyd W.
Regimbal Richard R.
Arola Dave W.
Drill Systems Inc.
Klaas Bruce G.
Shelton Dennis K.
LandOfFree
Multiple wall drill 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 Multiple wall drill pipe, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Multiple wall drill pipe will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2204412