Concentric pipe systems and methods
AssigneeKryn Petroleum Services LLC
InventorLuc Deboer
Life of this patent
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Abstract
A tubular assembly for a well system includes a drill pipe joint including a first pair of couplers disposed at ends thereof and a central passage, a flow sub configured to couple with the drill pipe joint, wherein the flow sub includes a second pair of couplers disposed at each end thereof and a first receptacle disposed therein, a first inner tubular member configured to be suspended from the first receptacle of the flow sub, wherein the first inner tubular member extends through the passage of the drill pipe joint forming an annulus therein when the drill pipe joint is coupled to the flow sub and the first inner tubular member is suspended from the first receptacle of the flow sub.
Claims16
A well system, comprising:
- a surface system comprising an inlet conduit and a return conduit;
- a wellhead system disposed above a wellbore;
- a drill string extendable through the wellhead system into the wellbore and configured to circulate fluid from the surface system to the wellbore along an inlet fluid flowpath, and to circulate fluid from the wellbore to the surface system along a recirculation fluid flowpath, wherein the drill string comprises:
- a plurality of drill pipe joints, wherein each drill pipe joint comprises couplers disposed at ends thereof and a central passage;
- a first flow sub releasably coupled to at least one of the plurality of drill pipe joints, wherein the first flow sub comprises couplers disposed at each end thereof, a first receptacle disposed therein, and a second receptacle disposed therein;
- a first inner tubular member suspended from the first receptacle of the first flow sub, wherein the inner tubular member extends through the passage of at least one of the plurality of drill pipe joints forming an annulus therein that comprises at least a portion of the inlet flowpath;
- and
- a second inner tubular member slidingly received in the second receptacle whereby an outer surface of the second inner tubular member is unattached from an inner surface of the second receptacle, wherein the second inner tubular member comprises a seal assembly to sealingly engage the inner surface of the second receptacle.
A tubular assembly for a well system, comprising:
- a drill pipe joint comprising a first pair of couplers disposed at ends thereof and a central passage;
- a flow sub configured to couple with the drill pipe joint, wherein the flow sub comprises a second pair of couplers disposed at each end thereof, a first receptacle disposed therein and a second receptacle disposed therein;
- a first inner tubular member configured to be suspended from the first receptacle of the flow sub, wherein the first inner tubular member extends through the passage of the drill pipe joint forming an annulus therein when the drill pipe joint is coupled to the flow sub and the first inner tubular member is suspended from the first receptacle of the flow sub;
- a second inner tubular member slidingly received in the second receptacle whereby an outer surface of the second inner tubular member is unattached from an inner surface of the second receptacle wherein the second inner tubular member comprises a seal assembly to sealingly engage the inner surface of the second receptacle.
A method for drilling a wellbore, comprising:
- (a) coupling a drill pipe joint with a flow sub;
- (b) suspending a first inner tubular member from a first receptacle of the flow sub through a passage of the drill pipe joint;
- (c) slidingly receiving a second inner tubular member in a second receptacle of the flow sub whereby an outer surface of the second inner tubular member is unattached from an inner surface of the second receptacle, wherein the second inner tubular member comprises a seal assembly to sealingly engage the inner surface of the second receptacle;
- and
- (d) circulating drilling fluid through a passage of the first inner tubular member and a bypass passage of the flow sub that extends around the first receptacle.
Dependencies are inferred from the claim text.