Fracturing method to reduce tortuosity
US8365827B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 16, 2010 |
| Grant date | Feb 5, 2013 |
| Priority date | — |
| Expiry date | Apr 15, 2031 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B43/112
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A series of jet nozzles have a telescoping structure designed to impact the borehole wall and initiate a fracture. The nozzles can be extended through fluid pumped through them or with some mechanical force from within the bottom hole assembly. The leading ends of the telescoping assembly can be sharp and hardened to facilitate the initiation of a formation fracture in an open hole. The telescoping structures can be disposed in a single or multiple rows with the circumferential spacing being such that each telescoping structure is designed to cover a target circumferential distance of 45 degrees or less so that jetted fluid from at least one jet will be within 22.5 degrees of a location of maximum formation stresses to reduce the tortuosity of the created fractures from jetting through the nozzles with possible enhancement of the fracturing from added annulus pressure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.