Subsea test tree control system

A method for controlling a subsea completion or workover assembly in a subsea well having a subsea tree member with a bore landing shoulder for receiving a tubing hanger, the method comprising:

• (a) providing the subsea tree member with a subsea tree member communication passage leading from an exterior of the subsea tree member to an upward facing subsea tree member port in the landing shoulder, providing the subsea tree member with a subsea control module (SCM) that provides hydraulic fluid pressure to control valves of the subsea tree member, and connecting the subsea tree member communication passage to the SCM;
• (b) connecting a riser from the subsea tree member to a platform at a sea surface;
• (c) providing the tubing hanger with a landing surface and a downward facing tubing hanger port in the landing surface, and providing the tubing hanger with a tubing hanger communication passage leading from the tubing hanger port to an upper end of the tubing hanger;
• (d) securing a string of tubing to the tubing hanger, securing the tubing hanger to a running tool assembly, and connecting a running tool assembly communication line between the tubing hanger communication passage and the running tool assembly;
• (e) running the tubing hanger, the string of tubing, and the running tool through the riser to land the landing surface on the landing shoulder and registering the subsea tree member port with the tubing hanger port, thereby connecting the subsea tree member communication passage with the running tool assembly via the tubing hanger communication passage and the running tool assembly communication line;
• and
• (f) supplying hydraulic fluid pressure and electric potential to the running tool and performing operations with the running tool assembly, wherein at least one of the hydraulic fluid pressure and the electric potential is supplied from the SCM via the subsea tree member communication passage, the tubing hanger communication passage and the running tool assembly communication line.

A subsea completion or workover assembly in a subsea well having a subsea tree member with a bore landing shoulder for receiving a tubing hanger, comprising:

• a subsea tree member communication passage formed in the subsea tree member leading from an exterior of the subsea tree member to an upward facing subsea tree member port in the landing shoulder;
• a riser extending from the subsea tree member to a platform at a sea surface;
• the tubing hanger having a landing surface and a downward facing tubing hanger port in the landing surface, the tubing hanger having a tubing hanger communication passage leading from the tubing hanger port to an upper end of the tubing hanger;
• a running tool assembly connected to the tubing hanger;
• a running tool assembly communication line that connects to the tubing hanger communication passage at the upper end of the tubing hanger;
• wherein
• the tubing hanger port registers with the subsea tree member port when the tubing hanger lands on the landing shoulder, thereby connecting the subsea tree member communication passage with the running tool assembly communication line via the tubing hanger communication passage;
• the running tool assembly operates in response to hydraulic fluid pressure and electric potential supplied to the running tool assembly;
• and
• at least one of the hydraulic fluid pressure and the electrical potential pass through the subsea tree member communication passage, the tubing hanger communication passage, and the running tool assembly communication line.