Wells – Processes – Placing or shifting well part
Patent
1983-10-21
1985-04-16
Novosad, Stephen J.
Wells
Processes
Placing or shifting well part
166 55, 166 75R, E21B 3304, E21B 2900
Patent
active
045110026
ABSTRACT:
A multiple tubing hanger tie back arrangement is disclosed in a preferred embodiment associated with a shear ram tubing head system (10). The arrangement includes a lower tubing hanger (44) sealingly secured within a lower tubing head (28) for supporting a tubing string (22). The lower hanger includes a control shoulder (60) at its upper end and a tapered interior surface (62). An upper tubing hanger (70) spaced above the lower hanger is also sealingly secured within an upper tubing head (24). A tie back subassembly (90) connects the upper and lower hangers, and preferably includes a tubing member (94) and a spacer member (92). The spacer member includes a stab nipple (96) in interference engagement with the lower hanger interior surface (62), and a load transfer surface (98) abuting the control shoulder (60). The tubing member (94) is located in the bore of the shear ram (26) so that severance of the tubing member (94) does not disturb the production tubing string (22) supported by the lower hanger (44). After severance, the tie back stub can be readily removed. A method of installation is also disclosed, including the steps of adjusting the distance between the upper hanger (70) and load transfer surface (98) to match the critical distance between the upper hanger bowl (38) and lower hanger control shoulder (60), so that the installed tie back assembly maintains pressure and mechanical continuity through the stack (30).
REFERENCES:
patent: 3692107 (1972-09-01), Slator et al.
patent: 3720260 (1973-03-01), Duck et al.
patent: 4043389 (1977-08-01), Cobb
patent: 4420042 (1983-12-01), Tunstall
Adamek Frank C.
Bonds James V.
Bridges Charles D.
Gray Tool Company
Kisliuk Bruce M.
Novosad Stephen J.
Ristas L. James
LandOfFree
Multiple tubing hanger tie back system and method does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Multiple tubing hanger tie back system and method, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Multiple tubing hanger tie back system and method will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1450718