Patent ID: 7178788

Claim:
An earth drilling machine comprising: a. a mast having a mast top and a mast bottom, wherein the mast bottom is mounted to a substructure; b. a crown block assembly mounted on the mast top for engaging a drilling line wherein the crown block assembly comprising: a first front sheave, a second front sheave, a third front sheave, and a fourth front sheave wherein the first front sheave, the second front sheave, the third front sheave and the fourth front sheave are all aligned on a front axis; c. a fast line sheave mounted to a crown block assembly for reeving the drilling line; d. a traveling swivel frame assembly connected to the mast, wherein the traveling frame assembly comprises with a first traveling sheave, a second traveling sheave, a third traveling sheave, and a fourth traveling sheave, and wherein the first traveling sheave, the second traveling sheave, the third traveling sheave, and the fourth traveling sheave are aligned on a traveling frame axis; and further wherein the first traveling sheave receives the drilling line from the first front sheave; e. wherein the traveling swivel frame assembly is vertically movable along a vertical axis, wherein the vertical axis extends from the mast top to the mast bottom; and wherein the first front sheave transfers the drilling line from the fast line sheave to the first traveling sheave; f. a top drive removably mounted to the traveling swivel frame assembly for rotating the earth drilling equipment; g. the second front sheave mounted to the crown block assembly transfers the drilling line from the first traveling sheave to the second traveling sheave; h. a crown cross over sheave receives the drilling line from the second traveling sheave and transfers the drilling line to the third traveling sheave; i. a third front sheave receives the drilling line from the third traveling sheave and transfers the drilling line to the fourth traveling sheave; j. the fourth traveling sheave transfers the drilling line to the fourth front sheave; k. a deadline sheave receives the drilling line from the fourth front sheave and transfers the drilling line to a deadline anchor; and wherein the fast line sheave and the deadline sheave are both aligned on a back axis; l. a drawworks assembly comprises a drawworks drum with a drum axis and wherein the front axis, the back axis, and the traveling frame axis are parallel to the drum axis; and m. wherein the crown cross over sheave defines a cross over axis and the cross over axis is mounted perpendicular to the drum axis.