Vent sub for lubricator

A system, comprising:

• a lubricator operably coupled to a wellhead and into which fluid flow is adapted to be received;
• one or more first sensors adapted to:
• detect, while the fluid flow is received into the lubricator, a presence or absence of fluid exiting, or after exiting, the lubricator, and
• in response to detecting the presence or absence of fluid, communicate one or more first signals to a controller;
• one or more second sensors adapted to:
• detect, while the fluid flow is received into the lubricator, a presence or absence of fluid:
• entering, or before entering, the lubricator;
• and/or within the lubricator,
• and
• in response to detecting the presence or absence of fluid, communicate one or more second signals to the controller;
• and
• the controller, which is adapted to:
• verify, based on the one or more second signals received from the one or more second sensors, that the one or more first signals received from the one or more first sensors were not generated due to false reading(s);
• and
• in response to verifying that that the one or more first signals received from the one or more first sensors were not generated due to false reading(s), cause impedance of additional fluid flow into the lubricator.

An apparatus, comprising:

• a non-transitory computer readable medium;
• and
• a plurality of instructions stored on the non-transitory computer readable medium and executable by one or more processors to implement the following steps:
• receiving fluid flow into a lubricator, the lubricator being operably coupled to a wellhead;
• while receiving the fluid flow into the lubricator,
• detecting, using one or more first sensors, a presence or absence of fluid exiting, or after exiting, the lubricator,
• in response to detecting the presence or absence of fluid using the one or more first sensors, communicating one or more first signals from the one or more first sensors to a controller,
• detecting, using one or more second sensors, a presence or absence of fluid:
• entering, or before entering, the lubricator;
• and/or
• within the lubricator,
• and
• in response to detecting the presence or absence of fluid using the one or more second sensors, communicating one or more second signals from the one or more second sensors to the controller;
• verifying, using the controller and based on the one or more second signals received from the one or more second sensors, that the one or more first signals received from the one or more first sensers were not generated due to false reading(s);
• and
• in response to verifying that the one or more first signals received from the one or more first sensors were not generated due to false reading(s), impeding additional fluid flow into the lubricator.

A system, comprising:

• one or more first sensors adapted to;
• detect, while fluid flow is received into a lubricator operably coupled to a wellhead, a presence or absence of fluid exiting, or after exiting, the lubricator, and
• in response to detecting the presence or absence of fluid, communicate one or more first signals to a controller;
• one or more second sensors adapted to:
• detect, while the fluid flow is received into the lubricator operably coupled to the wellhead, a presence or absence of fluid:
• entering, or before entering the lubricator;
• and/or
• within the lubricator,
• and
• in response to detecting the presence or absence of fluid, communicate one or more second signals to the controller;
• and
• the controller, which is adapted to:
• verify, based on the one or more second signals received from the one or more second sensors, that the one or more first signals received from the one or more first sensors were not generated due to false signal(s);
• and
• in response to verifying that the one or more first signals received from the one or more first sensors were not generated due to false signal(s), actuate one or more first valves through which an overflow of fluid from the lubricator is adapted to be received in order to impede additional fluid flow into the lubricator.