IMPROVEMENTS IN DRILLING APPARATUS

Title:

IMPROVEMENTS IN DRILLING APPARATUS

Document Type and Number:

WIPO Patent Application WO2004081332

Kind Code:

A3

Abstract:

The invention provides a drilling apparatus ( 1 ) having a base ( 2 ) from which a drilling arm is pivotally mounted. The drilling arm ( 3 ) has an inner arm ( 4 ) and an outer arm ( 5 ). The inner arm ( 4 ) has a first end ( 6 ) and a second end ( 7 ). The first end ( 6 ) is pivotally connected via a first pivot joint ( 8 ) to the base ( 2 ). The outer arm ( 5 ) has a first end ( 9 ) and a second end ( 10 ). The second end ( 7 ) of the inner arm ( 4 ) is pivotally connected via a second pivot joint ( 11 ) to the first end ( 9 ) of the outer arm ( 5 ). At the second end ( 10 ) of the outer arm ( 5 ) is a drill mounting assembly ( 12 ). Actuation of the inner and outer arms ( 4 ) and ( 5 ) is achieved via drive means in the form of hydraulic cylinders ( 13 ). Proper operation of the cylinders ( 13 ) causes the second end ( 10 ) of the outer arm ( 5 ) to follow a substantially linear path.

Inventors:

WILLIAMS TIMOTHY GARRY (NZ)

Application Number:

PCT/NZ2004/000051

Publication Date:

November 04, 2004

Filing Date:

March 10, 2004

Export Citation:

Click for automatic bibliography generation Help

Assignee:

ARMADRILLO LTD (NZ)
WILLIAMS TIMOTHY GARRY (NZ)

International Classes:

E21D20/00; G06F19/00; E21B; (IPC1-7): G06F19/00

Foreign References:

US6332502B1	2001-12-25
US4296820A	1981-10-27

Other References: