Tubing Hanger and Methods for Testing and Sealing the Tubing Hanger

Abstract

A tubing hanger assembly and method provide a tested and sealed tubing hanger. In one embodiment, a method for testing and sealing a tubing hanger includes attaching a test mandrel to the tubing hanger. The tubing hanger has an interior bore and a test port. The method also includes providing a test seal in the interior bore. The test seal is above the test port. In addition, the method includes adding pressure to the interior bore through the test port. The method further includes monitoring the pressure. Moreover, the method includes removing the test mandrel from the tubing hanger and attaching a production mandrel to the tubing hanger. Additionally, the method includes providing a seal in the interior bore. The seal has an upper seal and a lower seal. The upper seal is above the test port, and the lower seal is below the test port.

1 . A tubing hanger assembly, comprising:
 a tubing hanger body comprising a mandrel receiving body section, a seal receptacle body section, a tubing receiving body section disposed on the opposing end of the tubing hanger body from the mandrel receiving body section, wherein the seal receptacle body section is disposed between the mandrel receiving body section and the tubing receiving body section;   an interior bore extending longitudinally through the tubing hanger body, wherein the interior bore comprises a mandrel bore disposed within the mandrel receiving body section, a seal receptacle bore disposed within the seal receptacle body section, a valve preparation bore disposed within the tubing receiving body section, a tubing bore disposed within the tubing receiving body section, wherein the valve preparation bore is disposed between the tubing bore and the seal receptacle bore;   a test port, wherein the test port extends through the seal receptacle body section to the seal receptacle bore;   wherein the mandrel receiving body section comprises an upper suspension attachment system; and   wherein the tubing receiving body section comprises a tubing attachment system.   
     
     
         2 . The tubing hanger assembly of  claim 1 , wherein the upper suspension attachment system comprises upper suspension threads, wherein the upper suspension threads are left-handed threads. 
     
     
         3 . The tubing hanger assembly of  claim 1 , wherein the mandrel receiving body section comprises a mandrel stop. 
     
     
         4 . The tubing hanger assembly of  claim 1 , wherein a valve is disposed in the valve preparation bore. 
     
     
         5 . The tubing hanger assembly of  claim 1 , wherein the seal receptacle bore comprises a seal receptacle stop. 
     
     
         6 . The tubing hanger assembly of  claim 1 , further comprising a test mandrel, wherein the test mandrel is disposed in the interior bore and attached to the tubing hanger body. 
     
     
         7 . The tubing hanger assembly of  claim 6 , wherein the test mandrel comprises a suspension attachment system. 
     
     
         8 . The tubing hanger assembly of  claim 7 , wherein the suspension attachment system comprises threads, wherein the threads are left-handed threads. 
     
     
         9 . The tubing hanger assembly of  claim 6 , wherein the test mandrel comprises a sealing system, wherein the sealing system is disposed in the seal receptacle bore when the test mandrel is attached to the tubing hanger body. 
     
     
         10 . The tubing hanger assembly of  claim 1 , further comprising a production mandrel, wherein the production mandrel is disposed in the interior bore and attached to the tubing hanger body. 
     
     
         11 . The tubing hanger assembly of  claim 10 , wherein the production mandrel comprises a production mandrel attachment system. 
     
     
         12 . The tubing hanger assembly of  claim 11 , wherein the production mandrel attachment system comprises threads, wherein the threads are left-handed threads. 
     
     
         13 . The tubing hanger assembly of  claim 10 , wherein the production mandrel comprises a production mandrel sealing system, wherein the production mandrel sealing system is disposed in the seal receptacle bore when the production mandrel is attached to the tubing hanger body. 
     
     
         14 . A method for testing and sealing a tubing hanger, comprising:
 (A) attaching a test mandrel to the tubing hanger, wherein the tubing hanger comprises an interior bore and a test port;   (B) providing a test seal in the interior bore, wherein the test seal is disposed above the test port;   (C) adding pressure to the interior bore through the test port;   (D) monitoring the pressure;   (E) removing the test mandrel from the tubing hanger;   (F) attaching a production mandrel to the tubing hanger; and   (G) providing a seal in the interior bore, wherein the seal comprises an upper seal and a lower seal, and wherein the upper seal is disposed above the test port and the lower seal is disposed below the test port.   
     
     
         15 . The method of  claim 14 , wherein attaching the test mandrel comprises screwing the test mandrel in a left-hand direction. 
     
     
         16 . The method of  claim 14 , wherein the test seal comprises an upper test mandrel seal and a lower test mandrel seal. 
     
     
         17 . The method of  claim 14 , wherein attaching the production mandrel comprises screwing the production mandrel in a left-hand direction. 
     
     
         18 . The method of  claim 14 , wherein the upper seal comprises an elastomeric seal, and wherein the lower seal comprises an elastomeric seal. 
     
     
         19 . The method of  claim 14 , wherein monitoring the pressure comprises determining a closed system. 
     
     
         20 . The method of  claim 19 , wherein the production mandrel is attached to the tubing hanger when the closed system is determined.