Under-balanced directional drilling system

Details Under-balanced directional drilling system Under-balanced directional drilling system

2006-11-13

2009-02-24

Wright, Giovanna C (Department: 3672)

Wells

Processes

Specific pattern of plural wells

C166S050000, C166S369000

Reexamination Certificate

active

07493951

ABSTRACT:
A production well arrangement that includes a vertical main well extending into a gas producing strata and an access hole having a vertical portion coupled to a curved portion, which is coupled to a lateral portion. The vertical portion has an upper end defined on the ground surface and is laterally offset from the vertical main well. The lateral portion has a lateral end intersecting the vertical main well at an intersection point positioned between an upper end and lower end of the vertical main well, wherein the lateral end of the lateral portion does not extend beyond the vertical main well. One or more laterally extending holes extends from an intercepted zone defined on the access hole, which is upstream of the intersection point, wherein the one or more laterally extending holes do not intersect the vertically extending well.

REFERENCES:
patent: 6280000 (2001-08-01), Zupanick
patent: 6681855 (2004-01-01), Zupanick et al.
patent: 6976533 (2005-12-01), Zupanick
patent: 2004/0108110 (2004-06-01), Zupanick
patent: 2005/0051326 (2005-03-01), Toothman, Jr. et al.
patent: 2006/0266517 (2006-11-01), Stayton

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