06360831 is referenced by 119 patents and cites 1 patents.

Borehole opener, particularly for enlarging this hole underneath a casing in the field of oil prospecting, comprising a body (

2

) of longitudinal axis (

3

), a duct (

4

) for drilling fluid, formed longitudinally in the body (

2

), and at least two hole-opening arms (

5

) which have an active part (

7

) equipped with cutting means (

8

), which are distributed symmetrically in the body (

2

) about the longitudinal axis (

3

), and which are arranged therein in such a way that they can be moved between a position of rest (

9

) in the body (

2

) and an active position (

10

) partially out of the body (

2

); in this hole opener in order to move it from the position of rest (

9

) to the active position (

10

), each arm (

5

) has a face (

12

), internal to the body (

2

), designed to be subjected directly, in the same way as an active face of a piston, to the pressure of the drilling fluid flowing through the body (

2

).

Title
Borehole opener
Application Number
9/521408
Publication Number
6360831 (B1)
Application Date
March 8, 2000
Publication Date
March 26, 2002
Inventor
Antonio Carosielli
Chapelle-Lez-Herlaimont
US
Leif &angst kesson
Sandnes
US
Agent
Browning Bushman P C
US
Assignee
Halliburton Energy Services
TX, US
IPC
E21B 7/28
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