Insulated and/or concentric coiled tubing
AssigneesBJ Services Company, U.S.A., Nowsco Well Service Ltd.
InventorsH. Bernie Luft, Graham Wilde, Peter J. Pelensky
Life of this patent
Estimating the term…
Abstract
A coiled tubing composite comprising insulated coiled tubing, concentric coiled tubing and insulated concentric coil tubing, including structure with centralizers and providing an annulus for insulation. The invention includes a method for assembling concentric coiled tubing, with insulation, and apparatus in combination with the insulated coiled tubing composite for heat assisted production of hydrocarbons and minerals from a wellbore.
Claims71
A coiled tubing composite, comprising:
- an inner coiled tubing positioned within an outer coiled tubing defining an annulus therebetween;
- and
- a plurality of centralizers longitudinally spaced within said annulus between said inner and outer tubing at multiple intervals along the length of the composite;
- wherein said composite exhibits sufficient flexibility for reeling on a truckable spool and sufficient stiffness for injecting in a bore.
A method for assembling a concentric coiled tubing composite, comprising:
- (a) attaching a centralizer to a portion of a first coiled tubing length;
- (b) inserting said centralizer and a portion of said first tubing length into an end of a second coiled tubing length;
- and
- repeating said steps (a) and (b) to produce a composite concentric coiled tubing.
Apparatus for heat assisted production of hydrocarbons and minerals from a well bore, comprising in combination:
- several hundred feet of insulated tubing coiled
- on a truckable reel;
- a coiled tubing injector for receiving said coiled tubing from said reel and injecting said tubing into said well bore;
- and
- a source of heat including adapting apparatus for placing said source in fluid communication with said tubing.
Coiled tubing apparatus comprising:
- a reel having a diameter of less than 6 m eters;
- a continuous length of tubing coiled on said reel having a diameter of less than 10 inches;
- material attached to said tubing providing radial insulation along said tubing length;
- and a tubing injector adapted to receive said tubing from said reel and inject said tubing into a bore.
Insulated coiled tubing comprising a coiled tubing length having an outside diameter of between 1" and 6" and a plurality of centralizers longitudinally spaced at multiple intervals along said length.
A method for assembling insulated coiled tubing, comprising:
- (a) attaching a centralizer to a portion of a first coiled tubing length;
- (b) inserting said centralizer and a portion of said first tubing length into an end of a second tubing length;
- and
- (c) providing insulation between said first coiled tubing and said second tubing.
Apparatus for heat assisted production of hydrocarbons and minerals from a wellbore, comprising in combination:
- several hundred feet of tubing coiled on a truckable reel;
- a coiled tubing injector for receiving said coiled tubing from said reel and injecting said tubing into said well bore;
- insulating means for providing insulation adjacent said tubing;
- and
- a source of heat including adapting apparatus for placing said source in fluid communication with said tubing.
Coiled tubing apparatus comprising:
- a reel having a diameter of less that six meters;
- a continuous length of tubing coiled on said reel having a diameter of less than 10";
- a tubing injector adapted to receive said tubing from said reel and inject said tubing into a bore;
- and
- material attached to and surrounded by said tubing providing radial insulation along said tubing length.
A coiled tubing composite, comprising:
- an inner coiled tubing positioned within an outer coiled tubing defining an annulus therebetween;
- and
- insulation within said annulus between said inner and outer tubing;
- said insulated composite reeled on a truckable spool while structured with sufficient stiffness for injecting in a bore.
A method for assembling an insulated coiled tubing composite, comprising:
- inserting an outer coiled tubing length into a bore hole;
- inserting an inner coiled tubing length through an end of said outer length;
- inserting insulation between said inner tubing length, and said outer tubing length and
- reeling the insulated composite upon a truckable spool.
Dependencies are inferred from the claim text.