DIRECT PULLBACK DEVICES AND METHOD OF HORIZONTAL DRILLING

摘要

An apparatus for horizontal directional drilling includes a housing and a sonde transmitter mounted in the housing. The housing includes a main fluid channel to permit a flow of a fluid therethrough. The apparatus further includes a fluid outlet at the front of the housing in communication with the main fluid channel and adapted to emit fluid. from the front of the housing during pilot bore operations. The housing further includes a plurality of fluid ports in fluid communication with the main fluid channel and adapted to emit fluid from the housing during pullback operations. Drill bits, drill bit adapters adapters, swivel connectors, and tow heads adapted to be coupled to the drill bits for direct pullback operations, as well as methods of direct pullback operations during horizontal direction drilling are also provided.

主权项

1. An apparatus for horizontal directional drilling, the apparatus comprising:
an elongated housing including an interior, a front, a rear, and a longitudinal axis passing through the front and rear; a sonde transmitter mounted in the interior; a main fluid channel to permit a flow of a fluid therethrough, the channel extending in the interior of the housing in a direction along the longitudinal axis; a fluid outlet proximate the front of the housing, the fluid outlet being in fluid communication with the channel and adapted to permit the fluid to flow therethrough; a plurality of fluid ports in fluid communication with the main fluid channel and adapted to permit the fluid to be emitted therethrough; and a drill bit coupled to the front of the housing, the drill bit including a plurality of drill bit cutting elements.