Tubular system for jet drilling

摘要

Apparatus and method for drilling a drain hole from a well are provided. A flexible tubing used for conveying fluid to a jet bit is confined radially by a reduced-diameter tubing piece or a liner in production tubing near the diverter used to direct the flexible tubing. Concentric tubing pieces allow location of the bit in a well by measuring weight of a work string.

主权项

1. Apparatus for drilling drain holes from a well, comprising:
a diverter for directing a flexible tubing, the diverter being adapted for attachment to a production tubing in the well and having a diverter path therethrough; a flexible tubing having an outside surface and being adapted for joining to a jet bit at a distal end and being attached to an inner pipe piece at a proximate end, the inner pipe piece having an upper transition adapted for joining to a work string and a lower transition adapted for joining to the flexible tubing; an outer pipe piece, the outer pipe piece having a proximate transition adapted for stopping separation of the inner pipe piece and the outer pipe piece and a distal end; and a soluble body having a rounded front attached to the jet bit.