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(11)    Patent No :    AP 2342   
(21)    Application No :    AP/P/2007/004166   
(22)    Filing Date :    24.02.2006   
(24)    Date of Grant &    28.12.2011   
           
(45)    Publication :

(30)  Priority Data       
(33) Country    (31) Number    (32) Date
AU    2005900871    25.02.2005

(84)    Designated State

BW    GM    GH    KE    LS    MW  MZ   NA   SL
SD    SZ    T Z    UG    ZM    ZW
 

(73) Applicant(s)

COMMONWEALTH SCIENTIFIC AND INDUSTRIAL

RESEARCH ORGANISATION, Limestone Avenue, Campbell,
Australian Capital Territory 2612,

Australia

(72) Inventors

CAVANOUGH Gary, Lindsay, Australia

(74) Representative

GILL, GODLONTON & GERRANS

ZIMBABWE
 

(51)    International  Classification   E21B 44/00 (2006.01)


(54)    Title

A method and system for controlling an excavating apparatus

(57)    Abstract

A method for controlling a drilling apparatus comprising the steps of applying a rotation force to a drilling part of the drilling apparatus, applying a feed force to the drilling part with the feed force comprising a predetermined modulating frequency signal and predetermined feed force, wherein optimum predetermined feed force is determined periodically from sensed data relating to at least one of the rotation force and feed force to optimise the penetration

(56)    Documents Cited :    US 5449047    US 3971449    WO 1997/008428

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