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US 12,385,327 B2Granted
Downhole apparatus
AssigneeExpro North Sea Limited
InventorsTristam Paul Horn, Stephen Edmund Bruce, David Michael Shand, Tyler Rhes Reynolds
Life of this patent
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Abstract
A coupling connects an inner string to a lower end of a bore-lining tubing, such as a liner. The coupling includes a catcher and may be provided in combination with at least one member for translating through the inner string and landing in the catcher. The member may be an occluding member, such as a ball for occluding a flow passage through the coupling.
Claims19
A tubing assembly, comprising:
- a bore-lining casing;
- a bore-lining tubing extending from the bore-lining casing;
- an inner string;
- and
- a downhole coupling for connecting a lower end of the inner string to a lower end of the bore-lining tubing, wherein the downhole coupling is disposed within the lower end of the bore-lining tubing, and includes a female member configured to receive a male extension of the lower end of the inner string, and a catcher;
- and
- wherein the downhole coupling is configurable to permit separation of the lower end of the inner string from the lower end of the bore-lining tubing, wherein the inner string is retrievable from a bore while the bore-lining tubing, the coupling and the catcher remain in the bore;
- and
- wherein the coupling is in combination with at least one member for translating through the inner string and landing in the catcher.
6 more elements
A downhole method comprising:
- (a) mechanically coupling a lower end of an inner string to a lower end of a bore-lining tubing using a downhole coupling to form a tubing assembly, the bore-lining tubing extending from a bore-lining casing;
- then
- (b) translating at least one member through the inner string and the downhole coupling to a catcher in the lower end of the bore-lining tubing, and then
- (c) flowing fluid through the inner string and out of the bore-lining tubing.
1 more element
Dependencies are inferred from the claim text.