Pressure bleed-off module for oil and gas wells

A pressure bleed-off system for an oil or gas well, the system comprising:

• a pressure bleed-off module having an annulus vent of the oil or gas well, an inlet coupled to and configured to receive a fluid from the annulus vent, a kill valve of the oil or gas well, an outlet coupled to the inlet and the kill valve and configured to send the received fluid to the kill valve, and a path coupled between the inlet and the outlet and configured to channel a flow of the received fluid from the inlet to the outlet, wherein the path includes
• a pressure relief valve (PRV) dividing the path into an inlet side coupled to the inlet and an outlet side coupled to the outlet, and configured to open when the pressure of the received fluid in the inlet side exceeds a threshold and to close when the inlet fluid pressure is below the threshold,
• an isolation valve in the inlet side and configured to block the fluid flow in the inlet side,
• a pressure gauge in the inlet side and configured to measure the inlet fluid pressure,
• a pressure gauge in the outlet side and configured to measure the pressure of the received fluid in the outlet side,
• a pressure recorder configured to record the measured inlet and outlet fluid pressures,
• a sampling point in the outlet side and configured to drain the received fluid in the outlet side, and
• an isolation valve in the outlet side and configured to block the fluid flow in the outlet side;
• and
• a check valve assembly having an inlet configured to couple to and input the sent fluid from the module outlet, an outlet coupled to the assembly inlet and configured to couple to and output the sent fluid to the kill valve, and a plurality of one-way check valves coupled in series between the assembly inlet and the assembly outlet and configured to allow the sent fluid to flow from the module outlet to the kill valve, and to block any fluid flow from the kill valve to the module outlet.

An automated method of pressure bleed-off of a fluid from an oil or gas well using a pressure bleed-off module including an annulus vent of the oil or gas well and a kill valve of the oil or gas well, the method comprising:

• receiving the fluid from the annulus vent at an inlet of the module, the inlet being coupled to the annulus vent;
• channeling, by each of a plurality of paths of the module, a flow of the received fluid from the inlet to an outlet of the module, the paths being coupled in parallel between the inlet and the outlet;
• and
• sending the received fluid from the outlet to the kill valve, the outlet being coupled to the kill valve,
• wherein, for each path, channeling the flow includes:
• dividing the path into an inlet side coupled to the inlet and an outlet side coupled to the outlet using a pressure relief valve (PRV) of the path;
• opening the PRV when the pressure of the received fluid in the inlet side exceeds a threshold;
• closing the PRV when the inlet fluid pressure is below the threshold;
• measuring the inlet fluid pressure using a pressure gauge in the inlet side;
• measuring the pressure of the received fluid in the outlet side using a pressure gauge in the outlet side;
• and
• recording the measured inlet and outlet fluid pressures using a pressure recorder.