Methods and apparatus according to which a first valve is opened, or kept open, the first valve being part of a wellhead including a flow component above the first valve. The method may further include detecting a state of the first valve and, in response to detecting the state of the first valve, metering an amount of grease to the first valve. In addition, or instead, the method may further include opening, or keeping open, a second valve, the second valve being operably coupled to the wellhead and positioned above the flow component, and, after opening, or keeping open, each of the first and second valves, detecting whether the second valve is open or closed, in response to detecting that the second valve is open, preventing the first valve from being closed, and in response to detecting that the second valve is closed, allowing the first valve to be closed.

Methods and apparatus according to which a first valve is opened, or kept open, the first valve being part of a wellhead including a flow component above the first valve. The method may further include detecting a state of the first valve and, in response to detecting the state of the first valve, metering an amount of grease to the first valve. In addition, or instead, the method may further include opening, or keeping open, a second valve, the second valve being operably coupled to the wellhead and positioned above the flow component, and, after opening, or keeping open, each of the first and second valves, detecting whether the second valve is open or closed, in response to detecting that the second valve is open, preventing the first valve from being closed, and in response to detecting that the second valve is closed, allowing the first valve to be closed.

A system for providing lubrication to a machine. The system comprises at least one ultrasound sensor positioned to detect sound emanating from at least one lubrication point of the machine, and at least one auto-lubrication device configured to provide lubrication to the at least one lubrication point. The at least one auto-lubrication device is controlled to provide lubrication to the at least one lubrication point based at least in part on sound detection data from the at least one ultrasound sensor.

A system for providing lubrication to a machine. The system comprises at least one ultrasound sensor positioned to detect sound emanating from at least one lubrication point of the machine, and at least one auto-lubrication device configured to provide lubrication to the at least one lubrication point. The at least one auto-lubrication device is controlled to provide lubrication to the at least one lubrication point based at least in part on sound detection data from the at least one ultrasound sensor.

A device for monitoring a lubrication of a tool may include: a housing including: a lubricator connector configured to connect the housing to a lubricator and including a lubricant inlet opening, a chamber configured to receive a lubricant from the lubricator through the lubricant inlet opening, a tool connector configured to connect the housing to a lubricant fitting of a tool and including a lubricator outlet opening through which the lubricant leaves the chamber; and a pressure transducer configured to measure a lubricant pressure in the chamber of the housing and generate an output pressure signal related thereto.

A device for monitoring a lubrication of a tool may include: a housing including: a lubricator connector configured to connect the housing to a lubricator and including a lubricant inlet opening, a chamber configured to receive a lubricant from the lubricator through the lubricant inlet opening, a tool connector configured to connect the housing to a lubricant fitting of a tool and including a lubricator outlet opening through which the lubricant leaves the chamber; and a pressure transducer configured to measure a lubricant pressure in the chamber of the housing and generate an output pressure signal related thereto.

A hydraulic fracturing plan executable by a hydraulic fracturing system to hydraulically fracture a plurality of oil and gas wells.

A hydraulic fracturing plan executable by a hydraulic fracturing system to hydraulically fracture a plurality of oil and gas wells.

An oil restrictor for emergency lubrication of a component for an aircraft turbine engine includes a metal cylindrical body having a longitudinal axis and configured to be housed in and shrink-fitted into a cylindrical bore of a part of the turbine engine. The restrictor further includes an integrated oil circuit enabling oil to pass through the restrictor along the axial extent thereof. The body is a one-piece body, and the circuit has at least two oil channels recessed on an outer cylindrical surface of the body and extending around and/or along the axis.

An oil restrictor for emergency lubrication of a component for an aircraft turbine engine includes a metal cylindrical body having a longitudinal axis and configured to be housed in and shrink-fitted into a cylindrical bore of a part of the turbine engine. The restrictor further includes an integrated oil circuit enabling oil to pass through the restrictor along the axial extent thereof. The body is a one-piece body, and the circuit has at least two oil channels recessed on an outer cylindrical surface of the body and extending around and/or along the axis.