Automated preventive and predictive maintenance of downhole valves

A non-transitory, computer-readable medium storing one or more instructions executable by a computer system to perform operations in a well system comprising a plurality of downhole valves, each downhole valve positioned below a surface and in a wellbore included in the well system, each downhole valve controlling flow of well fluid through the wellbore, the operations comprising:

• detecting a change in a valve line pressure of a first downhole value of the plurality of downhole valves;
• determining, in response to detecting the change in the valve line pressure, whether the change is due to a planned maintenance;
• performing, in response to determining that the change is not due to a planned maintenance, a diagnostic test on the first downhole valve, the diagnostic test comprising:
• receiving, at a first time and by one or more processors, first diagnostics data of the first downhole valve of the plurality of downhole valves, wherein the first diagnostics data represents:
• (i) a first valve condition of the downhole valve at a first valve position and at the first time, and (ii) a first well head pressure at the surface of the well system for the first downhole valve at the first valve position and at the first time;
• causing the first downhole valve to move from the first valve position to a second valve position;
• receiving, at a second time and by the one or more processors, second diagnostics data of the first downhole valve, wherein the second diagnostics data represents:
• (i) a second valve condition of the first downhole valve at the second valve position and at the second time, and (ii) second well head pressures at the surface of the well system for the first downhole valve at the second valve position and at the second time;
• comparing the first diagnostics data and the second diagnostics data;
• and
• based on results of comparing the first diagnostics data and the second diagnostics data, selecting a valve maintenance operation for the first downhole valve.

A system, comprising:

• a computer memory;
• and
• a hardware processor interoperably coupled with the computer memory and configured to perform operations in a well system comprising a plurality of downhole valves, each downhole valve positioned below a surface and in a wellbore included in the well system, each downhole valve controlling flow of well fluid through the wellbore, the operations comprising:
• detecting a change in a valve line pressure of a first downhole value of the plurality of downhole valves;
• determining, in response to detecting the change in the valve line pressure, whether the change is due to a planned maintenance;
• performing, in response to determining that the change is not due to a planned maintenance, a diagnostic test on the first downhole valve, the diagnostic test comprising:
• receiving, at a first time and by one or more processors, first diagnostics data of the first downhole valve of the plurality of downhole valves, wherein the first diagnostics data represents:
• (i) a first valve condition of the first downhole valve at a first valve position and at the first time, and (ii) a first well head pressure at the surface of the well system for the first downhole valve at the first valve position and at the first time;
• causing the first downhole valve to move from the first valve position to a second valve position;
• receiving, at a second time and by the one or more processors, second diagnostics data of the first downhole valve, wherein the second diagnostics data represents:
• (i) a second valve condition of the first downhole valve at the second valve position and at the second time, and (ii) a second well head pressure at the surface of the well system for the first downhole valve at the second valve position and at the second time;
• comparing the first diagnostics data and the second diagnostics data;
• and
• based on results of comparing the first diagnostics data and the second diagnostics data, selecting a valve maintenance operation for the first downhole valve.