Boring or penetrating the earth – Natural vibration characteristic of an element of boring...
Patent
1995-03-27
1996-07-30
Tsay, Frank S.
Boring or penetrating the earth
Natural vibration characteristic of an element of boring...
173 49, 74 61, E21B 724
Patent
active
055402950
ABSTRACT:
A vibrator yoke assembly (Y) for drill stems is moveably mounted on a drilling rig (R). A guide rail (10) is mounted to a support section (22) of the drill rig (R). Traveling along the guide rail (10) along the direction of travel for the drill string while boring the hole is a carriage (28) supporting the yoke assembly (Y). Activation of a motor moves the carriage (28) along the guide rail (10) as desired by the operator. Affixed to the carriage (28) above the upper end (12u) of the upper section (12) of the drill string (14) is the yoke assembly (Y). The yoke assembly (Y) has an upper hydraulic motor (40) coupled to an upper end (42) of a quill body (44). The quill body extends through the yoke assembly (Y) and a lower end (48) of the quill body engages the upper pipe end (12u). A pair of vibrators (52a and 52b) are attached to the yoke assembly (Y). Motors (58a and 58b) rotate eccentrics (60a and 60b), having flat segments or sections (62a and 62b), to cause the vibration in yoke assembly (Y) to assist in the boring of the hole.
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Timmons W. Thomas
Tsay Frank S.
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