Boring or penetrating the earth – Means traveling with tool to constrain tool to bore along... – Sectional guide or shaft having means to lock sections in...
Patent
1985-12-27
1987-02-10
Novosad, Stephen J.
Boring or penetrating the earth
Means traveling with tool to constrain tool to bore along...
Sectional guide or shaft having means to lock sections in...
175256, 175325, F21B 708
Patent
active
046417176
ABSTRACT:
A connector housing for connecting a motor housing to a bearing housing, so that the angle between the longitudinal axis of the motor housing and the longitudinal axis of the bearing housing can be changed. The connector housing has a top housing, a center housing, and a bottom housing. The top and bottom housings have angles in their respective longitudinal axes aligned in the same direction. The center housing has a pair of angles in its longitudinal axis, the sum of which is equal to the sum of the angles in the top and bottom housings. The top and bottom housings are held against rotation relative to one another, but can be rotated 180 degrees relative to the center housing. A stabilizer holds the center housing as the top and bottom housings are rotated. Dogs limit the relative rotation between the center housing and the other housings to not more than 180 degrees. A piston holds the center housing against rotation relative to the other housings whenever drilling fluid is being pumped through the connector housing. When the fluid is not being pumped through the connector housing, a spring bias the piston to a position in which the center housing can rotate relative to the other housings.
REFERENCES:
patent: 2375313 (1945-05-01), Miller
patent: 3842914 (1974-10-01), Mott
patent: 4076084 (1978-02-01), Tighe
patent: 4220214 (1980-09-01), Benoit
patent: 4286676 (1981-09-01), Nguyen et al.
patent: 4485879 (1984-12-01), Kamp et al.
patent: 4508182 (1985-04-01), Anders
patent: 4522272 (1985-06-01), Beimgraben
patent: 4572305 (1986-02-01), Swietlik
Bagnell David J.
Hughes Tool Company
Kelly H. Dennis
Novosad Stephen J.
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