Downhole construction of vacuum insulated tubing

Abstract

A method for adjusting a pressure within a wellbore. The method can include inserting a first tubing into the wellbore. The method can also include mechanically coupling a bottom coupling feature of a multiple connection bushing to the first tubing. The method can further include mechanically coupling a second tubing to a first top coupling feature of the multiple connection bushing. The method can also include mechanically coupling a third tubing to a second top coupling feature of the multiple connection bushing, where the third tubing has an inner diameter that is greater than an outer diameter of the second tubing. The method can further include inserting the multiple connection bushing, the second tubing and the third tubing into the wellbore. The method can also include adjusting the pressure within a space between the second tubing, the third tubing, and the multiple connection bushing.

What is claimed is: 
     
         1 . A method for adjusting a pressure within a wellbore, the method comprising:
 inserting a first tubing into the wellbore;   mechanically coupling a bottom coupling feature of a multiple connection bushing to the first tubing, wherein the multiple connection bushing further comprises a first top coupling feature and a second top coupling feature;   mechanically coupling a second tubing to the first top coupling feature of the multiple connection bushing;   mechanically coupling a third tubing to the second top coupling feature of the multiple connection bushing, wherein the third tubing has an inner diameter that is greater than an outer diameter of the second tubing;   inserting the multiple connection bushing, the second tubing, and the third tubing into the wellbore; and   adjusting the pressure within a space between the second tubing, the third tubing, and the multiple connection bushing.   
     
     
         2 . The method of  claim 1 , further comprising:
 positioning, after mechanically coupling a second tubing to the first top coupling feature of the multiple connection bushing, at least one centralizer around an outer surface of the second tubing.   
     
     
         3 . The method of  claim 1 , wherein the third tubing has an outer diameter that is less than an inner diameter of a production tubing inserted into the wellbore. 
     
     
         4 . The method of  claim 1 , wherein the second tubing comprises a plurality of second tubing members that are mechanically coupled to each other on an end-to-end basis, and wherein the third tubing comprises a plurality of third tubing members that are mechanically coupled to each other on an end-to-end basis. 
     
     
         5 . The method of  claim 4 , wherein a second tubing member of the plurality of second tubing members is mechanically coupled to the first top coupling feature of the multiple connection bushing before a third tubing member of the plurality of third tubing members is mechanically coupled to the second top coupling feature of the multiple connection bushing. 
     
     
         6 . The method of  claim 5 , wherein, after inserting the multiple connection bushing, the second tubing member and the third tubing member into the wellbore, another second tubing member of the plurality of second tubing members is mechanically coupled to the second tubing member before another third tubing member is mechanically coupled to the third tubing member. 
     
     
         7 . The method of  claim 1 , further comprising:
 allowing the second tubing to expand and contract with temperature independent of expansion and contraction of the third tubing.   
     
     
         8 . The method of  claim 7 , wherein the pressure is maintained within the space when the second tubing expands and contracts. 
     
     
         9 . The method of  claim 1 , wherein the working fluid comprises an injection pressure of approximately 3,300 pounds per square inch, wherein the working fluid is injected into an annulus of the first tubing. 
     
     
         10 . The method of  claim 1 , wherein the pressure within the space is adjusted toward zero, and wherein the pressure within the space is substantially uniform along its length. 
     
     
         11 . A method for extracting a downhole fluid in a wellbore using vacuum-insulated tubing, the method comprising:
 inserting first tubing into the wellbore;   mechanically coupling a bottom coupling feature of a multiple connection bushing to the first tubing, wherein the multiple connection bushing further comprises a first top coupling feature and a second top coupling feature;   mechanically coupling a second tubing to the first top coupling feature of the multiple connection bushing;   mechanically coupling a third tubing to the second top coupling feature of the multiple connection bushing, wherein the third tubing has an inner diameter that is greater than an outer diameter of the second tubing;   inserting the multiple connection bushing, the second tubing, and the third tubing into the wellbore;   adjusting a pressure within a space between the second tubing, the third tubing, and the multiple connection bushing;   inserting a working fluid into a cavity formed by an annulus of the first tubing, a passage through the multiple connection bushing, and an annulus of the second tubing; and   extracting, using completion equipment, production fluid after the working fluid interacts with the production fluid.   
     
     
         12 . The method of  claim 11 , wherein the pressure within the space is adjusted toward zero, and wherein the second tubing has a first temperature that is substantially higher than a second temperature of the third tubing when the working fluid is inserted into the cavity. 
     
     
         13 . The method of  claim 11 , wherein the working fluid has a temperature that exceeds 750° F. 
     
     
         14 . A system for adjusting a pressure within a wellbore, the system comprising:
 a first tubing disposed within the casing and comprising an open distal end and a proximal end;   a multiple connection bushing mechanically coupled to the proximal end of the first tubing using a bottom coupling feature, wherein the multiple connection bushing further comprises a first top coupling feature and a second top coupling feature;   a second tubing disposed within the casing and mechanically coupled to the first top coupling feature of the multiple connection bushing;   a third tubing disposed within the casing and mechanically coupled to the second top coupling feature of the multiple connection bushing, wherein the third tubing has an inner diameter that is greater than an outer diameter of the second tubing; and   a vacuum system located proximate to a surface and communicably coupled to a space between the second tubing and the third tubing, wherein the vacuum system adjusts a pressure within the space.   
     
     
         15 . The system of  claim 14 , further comprising:
 a power source located proximate to the surface;   an injection device electrically coupled to the power source, wherein the injection device is located proximate to the surface, and wherein the injection device is communicably coupled to, and sends a working fluid down, a first cavity formed by an annulus of the second tubing, a passage through the multiple connection bushing, and an annulus of the first tubing; and   completion equipment electrically coupled to the power source and disposed in the wellbore below the first tubing.   
     
     
         16 . The system of  claim 15 , further comprising:
 a casing disposed within the wellbore and comprising a plurality of perforations for receiving the production fluid from a reservoir adjacent to the plurality of perforations, wherein the third tubing has an outer diameter that is less than an inner diameter of the casing, and   a cable mechanically coupled to the power source and the completion equipment, wherein the cable is disposed between the casing and the third tubing.   
     
     
         17 . The system of  claim 14 , further comprising:
 at least one centralizer disposed between the second tubing and the third tubing, wherein the at least one centralizer is made of a thermally non-conductive material.   
     
     
         18 . The system of  claim 14 , further comprising:
 a riser housing positioned atop a wellhead spool above the surface; and   a riser joint mechanically coupled to a proximal end of the second tubing, wherein the riser joint is moveably coupled to, and positioned inside of a channel that traverses, the riser housing.   
     
     
         19 . The system of  claim 18 , further comprising:
 a lubricant disposed within a second cavity formed between the riser housing and the riser joint; and   at least one sealing member disposed within a wall of the riser housing between the riser housing and the riser joint.   
     
     
         20 . The system of  claim 14 , wherein the vacuum system comprises a vacuum pump.