Well head tubing hanger conversion configuration and method for completing a well using the same

Abstract

A wellhead adapter configuration includes a body configured and dimensioned to attach to a wellhead. An inside dimension sufficient to allow through passage of a casing hanger. A method for preparing a borehole.

What is claimed is: 
     
         1 . A wellhead adapter configuration comprising:
 a body configured and dimensioned to attach to a wellhead;   an inside dimension sufficient to allow through passage of a casing hanger.   
     
     
         2 . The wellhead adapter as claimed in  claim 1  further comprising a profile extending generally radially outwardly from a wall of the wellhead adapter that defines the inside dimension of the wellhead adapter. 
     
     
         3 . The wellhead adapter as claimed in  claim 2  wherein the profile is a snap ring groove. 
     
     
         4 . The wellhead adapter as claimed in  claim 2  wherein the profile is a complex shape. 
     
     
         5 . The wellhead adapter as claimed in  claim 2  wherein the profile is a thread. 
     
     
         6 . A method for preparing a borehole comprising:
 running a wellhead adapter either with or subsequent to the running of a wellhead, the wellhead adapter having an inside dimension sufficient to allow through passage of a casing hanger;   running a casing and casing hanger to the wellhead through the wellhead adapter;   running a tubing and tubing hanger and landing shoulder into the wellhead adapter.   
     
     
         7 . The method as claimed in  claim 6  wherein the running of the casing and casing hanger occurs with a drilling run. 
     
     
         8 . The method as claimed in  claim 6  wherein the running of the landing shoulder includes a radially outward expanding of the landing shoulder into a profile of the wellhead adapter, the profile extending generally radially outwardly from a wall of the wellhead adapter that defines the inside dimension of the wellhead adapter. 
     
     
         9 . The method as claimed in  claim 6  wherein the running of the tubing hanger includes positioning a spacer atop a casing hanger to position the tubing hanger and tubing within the wellhead adapter. 
     
     
         10 . A method comprising:
 running a first manufacturer's wellhead either with a wellhead adapter as claimed in  claim 1  or prior to running the wellhead adapter as claimed in  claim 1 ;   connecting the wellhead adapter to the wellhead;   running a casing and casing hanger through the wellhead adapter to land in the wellhead; and   running a tubing and tubing hanger from a manufacturer different than the first manufacturer to land in the wellhead adapter.