Wells – Processes – Cementing – plugging or consolidating
Reexamination Certificate
2000-01-28
2001-11-06
Schoeppel, Roger (Department: 3672)
Wells
Processes
Cementing, plugging or consolidating
C166S289000, C166S386000, C166S074000, C166S177300, C166S177400, C166S223000
Reexamination Certificate
active
06311774
ABSTRACT:
BACKGROUND
The invention relates to securing a well casing to a well bore.
As shown in
FIG. 1
, a subterranean well might have a lateral wellbore that is lined by a casing
12
. Besides supporting the lateral wellbore, the monobore casing
12
serves as a conduit to carry well fluids out of the lateral wellbore. The lateral wellbore extends through several regions called production zones where a producing formation has been pierced by explosive charges to form fractures
14
in the formation. Near the fractures
14
, the monobore casing
12
has perforations
16
which allow well fluid from the formation to flow into a central passageway of the casing
12
. The casing
12
is typically secured to the well bore by cement.
SUMMARY
In one embodiment, the invention features a well casing for receiving well fluid from a producing formation. The well casing has a first tubular section that has a tortuous outer surface for directing the flow of a bonding agent around the exterior of the first tubular section. The first tubular section has a central passageway. The well casing also has a second tubular section that is coaxial with and is connected to the first tubular section. The second tubular section has at least one opening for directing well fluid into a central passageway of the second tubular section.
In other embodiment, the invention features a well casing for receiving well fluid from a producing formation. The well casing has a tubular section that has a central passageway for receiving well fluid and a port for directing a bonding agent from the central passageway to a region outside of the tubular section. The casing has a wiper that is slidably mounted on an outer surface of the tubular section and is configured to apply pressure to the bonding agent.
In another embodiment, the invention features a method for use in a well. The method includes using a central passageway of a tubing to receive well fluid from a producing formation and using a tortuous outer surface of the tubing for directing the flow of a bonding agent around an exterior region of the tubing.
In yet another embodiment, the invention features a method for use in a well. The method includes using a central passageway of a tubing to receive well fluid from a producing formation and using a wiper on the outer surface of the tubing to direct flow of a bonding agent around an exterior region of the tubing.
REFERENCES:
patent: 4787457 (1988-11-01), Webster et al.
patent: 4842066 (1989-06-01), Galiakbarov et al.
patent: 4869323 (1989-09-01), Stagg
patent: 5107927 (1992-04-01), Whiteley et al.
patent: 5165476 (1992-11-01), Jones
patent: 5318119 (1994-06-01), Lowry et al.
patent: 5829526 (1998-11-01), Rogers et al.
Brockman Mark W.
Huber Klaus B.
Schlumberger Technology Corporation
Schoeppel Roger
Trop Pruner & Hu PC
LandOfFree
Method and apparatus for securing a well casing to a wellbore does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for securing a well casing to a wellbore, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for securing a well casing to a wellbore will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2610250