Janice L Johnson

US Patent:

7703538, Apr 27, 2010

Filed:

Jun 23, 2006

Appl. No.:

11/473741

Inventors:

Janice R. Johnson - Houston TX, US
James G. King - Kingwood TX, US

Assignee:

Baker Hughes Incorporated - Houston TX

International Classification:

E21B 34/10
E21B 17/00

US Classification:

166375, 1662421, 1662423, 166 557

Abstract:

Access to a downhole tool through a tubular wall is created with a penetration tool into a surrounding annular chamber. The chamber is disposed around a tool joint between the end connection leaving an annular chamber that is of considerable length and allowing penetration anywhere along such length. The need to precisely position the penetration tool, as in past designs of annular chambers disposed within a pin and box connection is eliminated. Landing shoulders for the penetrating tool are also not required as the long length of the annular chamber allows surface personnel to sufficiently and accurately place the penetration tool somewhere along the length of the annular chamber.