Retrofit wellbore fluid injection system

Abstract

A fluid injection system for a wellbore includes an adapter configured to be retained in a safety valve landing nipple. The landing nipple is disposed in a production tubing inserted in the wellbore. The adapter includes a first sealed fluid passage between a part of the tubing disposed above the adapter and a first fluid injection line disposed in a part of the tubing below the adapter. The adapter includes a second sealed fluid passage between a part of the tubing below the adapter and a second fluid injection line disposed inside the tubing above the adapter. The second fluid injection line extends to a wellhead at an upper end of the wellbore.

1 . A fluid injection system for a wellbore, comprising:
 an adapter configured to be retained in in a production tubing inserted in the wellbore, the adapter including a first sealed fluid passage between a part of the tubing disposed above the adapter and a first fluid injection line disposed in a part of the tubing below the adapter, the adapter including a second sealed fluid passage between a part of the tubing below the adapter and a second fluid injection line disposed inside the tubing above the adapter, the second fluid injection line extending to a wellhead at an upper end of the wellbore.   
     
     
         2 . The adapter of  claim 1  wherein the adapter is configured to be retained in a safety valve landing nipple. 
     
     
         3 . The fluid injection system of  claim 1  further comprising at least one gas lift valve disposed in the first fluid injection line. 
     
     
         4 . The fluid injection system of  claim 1  further comprising a safety valve disposed in the second sealed passage below the adapter. 
     
     
         5 . The fluid injection system of  claim 4  further comprising an hydraulic connector configured to establish hydraulic connection between the safety valve and an hydraulic control line coupled to the landing nipple. 
     
     
         6 . The fluid injection system of  claim 4  further comprising an electrical connector configured to establish electrical connection between the safety valve and an electrical control line coupled to the landing nipple. 
     
     
         7 . The fluid injection system of  claim 1  further comprising an electrical connector disposed on a lower end of the second fluid injection line, the electrical connector configured to make electrical connection between a first electrical cable disposed on the second fluid injection line through the adapter to a second electrical cable disposed on the first fluid injection line. 
     
     
         8 . The system of  claim 1  wherein the first sealed fluid passage comprises at least one of an electrical cable, a fiber optical cable and an hydraulic line extending from the wellhead to the adapter, the adapter including internal connections between the at least one of a electrical cable, fiber optic cable and hydraulic line in the first sealed fluid passage and at least one of an electrical cable, a fiber optic line and an hydraulic line extending to a device disposed below the adapter. 
     
     
         9 . The system of  claim 8  wherein the at least one of an electrical cable, a fiber optic line and an hydraulic line extending to a device disposed below the adapter replaces the first fluid injection line. 
     
     
         10 . The fluid injection system of  claim 8  further comprising at least one sensor disposed on the first fluid injection line. 
     
     
         11 . The fluid injection system of  claim 1  further comprising an hydraulic connector disposed on a lower end of the second fluid injection line, the hydraulic connector configured to make hydraulic connection between a first hydraulic line disposed on the second fluid injection line through the adapter to a second hydraulic line disposed on the first fluid injection line. 
     
     
         12 . A method for installing a fluid injection system in a wellbore, comprising:
 extending a first fluid injection tubing into a production tubing into the wellbore;   coupling an adapter to an upper end of the first injection tubing, the adapter configured to be retained in a safety valve landing nipple, the landing nipple disposed in a production tubing inserted in the wellbore, the adapter including a first sealed fluid passage between a part of the production tubing disposed above the adapter and a first fluid injection tubing, the adapter including a second sealed fluid passage between a part of the production tubing below the adapter and a second fluid injection tubing disposed inside the production tubing above the adapter, the second fluid injection line extending to a wellhead at an upper end of the wellbore;   lowering the adapter into the wellbore and engaging the adapter with the safety valve landing nipple;   extending a second fluid injection tubing into the production tubing; and   engaging a lower end of the second fluid injection tubing with the adapter.   
     
     
         13 . The method of  claim 9  further comprising pumping fluid into the second injection tubing. 
     
     
         14 . The method of  claim 10  wherein the fluid comprises gas. 
     
     
         15 . The method of  claim 11  further comprising opening a gas lift valve disposed at a selected position along the first fluid injection tubing. 
     
     
         16 . The method of  claim 9  further comprising extending an armored electrical cable into the second injection tubing, through the adapter and into the first injection tubing, engaging the armored electrical cable to a device disposed in the first injection tubing, and removing the device from the first injection tubing by withdrawing the armored electrical cable. 
     
     
         17 . The method of  claim 9  wherein the extending the first fluid injection tubing comprises extending a coiled tubing. 
     
     
         18 . The method of  claim 9  wherein the lowering the adapter comprises extending an armored electrical cable. 
     
     
         19 . The method of  claim 9  wherein the extending the second fluid injection tubing comprises extending a coiled tubing. 
     
     
         20 . The method of  claim 9  further comprising operating a safety valve disposed in the second fluid passage. 
     
     
         21 . The method of  claim 17  wherein the operating the safety valve comprises pumping hydraulic fluid into a control line coupled to the landing nipple.