Horizontal drilling method and apparatus
US6257353A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 23, 1999 |
| Grant date | Jul 10, 2001 |
| Priority date | — |
| Expiry date | Feb 23, 2019 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B29/02
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
The objects of the invention are provided using a method for horizontal drilling in which a shoe having an elbow-shaped cavity therein is lowered to a selected point. An explosive charge is placed at the far end of the shoe adjacent to the well casing. Impact transferring means are positioned between the explosive charge and the vertical portion of the well above the shoe. An impact is struck on the surface of the transfer means to cause an impact-type detonator to discharge, causing the explosive charge to discharge. This perforates the casing of the well at the tip of the shoe. The shoe and the tubing above it are then cleared and a hydraulic drilling device is inserted into the shoe. The shoe guides the hydraulic drilling device into place and high pressure liquid is pumped through the hydraulic device which extends through the perforation in the well casing into the earth's strata.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.