Patent ID: 7441595
Filing Date: 2008-10-28
Classification: E21B

Abstract:
1. A method for sequentially forming multiple lateral passages extending into a subsurface formation from a well and each being oriented along an independent azimuth from the well; comprising: running a lateral passage forming tool having a rotary indexing mechanism connected therewith into the well, said indexing mechanism having a first indexing component having a guide receptacle and a guide member projecting within said guide receptacle and a second indexing component defining a circumferential multiposition rotary indexing slot having a plurality of indexing sections; orienting one of said first and second indexing components such that said multiposition rotary indexing slot is positioned to receive said guide member in guided relation therewith; achieving relative linear and rotational movement of said first and second indexing components and causing said guide member to engage a first indexing section of said rotary indexing slot and become seated at a first indexing position; conducting a first of a plurality of lateral passage forming operations; sequentially repeating said relative linear and rotation movement of said first and second indexing components and sequentially conducting succeeding lateral passage forming operations; and after completion of a predetermined number of sequential lateral passage forming operations, retrieving said lateral passage forming tool and said indexing mechanism from the well.