Boring or penetrating the earth – With tool shaft detail – Shaft carried guide or protector
Patent
1980-06-02
1981-08-25
Novosad, Stephen J.
Boring or penetrating the earth
With tool shaft detail
Shaft carried guide or protector
13762531, 175 65, 175215, E21B 1718, E21B 2110
Patent
active
042854083
ABSTRACT:
Device for use in the drill string used to drill an oil well. The device has a cylindrical body, four passageways located lengthwise through the cylindrical body, and a Y-shaped bottom member, which has a Y-shaped passageway therethrough. The two upper arms of the bottom device communicate with two oppositely-located passageways in the cylindrical body. Such Y-shaped passageways communicate with the bottom portion of the drill pipe. A top stem, which has a longitudinal passageway thereof and which has four side ports. Such longitudinal passageway communicates with the top portion of the drill pipe. A collar is rotatably positioned around the four ports of the top stem and is slidably removable from the top stem. The collar has two side L-shaped arms, with a passageway in each arm. Retainer means which is detachably positioned around the top of the top stem. The cylindrical body tightly and rotable fits within the well casing.
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Novosad Stephen J.
Well Tools, Inc.
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