Drilling system and method suitable for coring and other purposes
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
May 18, 2004
Grant Date -
Jun 12, 2003
app pub date -
Mar 5, 2002
filing date -
Dec 6, 2001
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A wellbore assembly is provided that is operable in wellbores in the range of six to six and one-half inches for obtaining large diameter cores, e.g., cores greater than or equal to two and seven-eighths inches in diameter. The wellbore assembly may preferably be utilized with drill pipe so that standard drilling rigs may be utilized in drilling and coring operations therewith. The drill pipe in accord with the present invention may be formed by modifying standard API drill pipe such as API four and one-half inch IF (Internal Flush) drill pipe in a special manner that renders the drill pipe still suitable for the type of drilling operations of interest and also suitable for handling by any drilling rig capable of using standard API drill pipe. Alternatively, the drill piper may be initially manufactured in accord with the specifications of the present invention. The coring tool preferably comprises an inner core barrel for receiving the core and, in a presently preferred embodiment, may be sized to obtain a core having an outer diameter from about three to three and one-half inches.
First Claim
Family
International Classification(s)
- [Classification Symbol]
- [Patents Count]
Cited Art Landscape
Patent Citation Ranking
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully