A method and apparatus for determining a parameter of a production fluid in a wellbore by providing an initially blocked isolated communication path between a sensor and an aperture formed in a sleeve. The isolated communication path is subsequently unblocked to allow measurements of the parameter of the production fluid.

In a case where a travel permission request regarding a queuing zone for a first unmanned vehicle stopped in a queuing zone is received, on the basis of a time length taken for the first unmanned vehicle arriving at a deceleration start position and a time length taken for a second unmanned vehicle positioned in a loading zone going out of the loading zone from reception of a loading completion notification, a travel start time difference after which the second unmanned vehicle goes out of the loading zone before the first unmanned vehicle arrives at a deceleration start position is calculated, a travel start time of the first unmanned vehicle is calculated on the basis of a reception time of the loading completion notification and the travel start time difference, and a travel permission regarding the queuing zone for the first unmanned vehicle is output after the travel start time has come. As a result, it is possible to shorten a time length required for replacement of unmanned vehicles at a loading position and enhance productivity.

An earth working machine includes a machine frame, a drive configuration and a milling drum. A bearing stem is attached to one of the drive configuration and the milling drum, the bearing stem protruding in a first direction to a first axial end, the bearing stem having an outer surface including at least first and second cylindrical bearing surfaces axially spaced from each other, a furthest one of the cylindrical bearing surfaces from the drive axial end having a smaller diameter than a next furthest one of the cylindrical bearing surfaces from the drive axial end. A non-locating bearing is connected to the machine frame and configured to receive the first and second cylindrical bearing surfaces of the bearing stem.

A method and apparatus for determining a parameter of a production fluid in a wellbore by providing an initially blocked isolated communication path between a sensor and an aperture formed in a sleeve. The isolated communication path is subsequently unblocked to allow measurements of the parameter of the production fluid.

A method and apparatus for determining a parameter of a production fluid in a wellbore by providing an initially blocked isolated communication path between a sensor and an aperture formed in a sleeve. The isolated communication path is subsequently unblocked to allow measurements of the parameter of the production fluid.

A ground engaging tool locking system includes a pin having a first, proximal head region and a second, distal end region spaced from the first, proximal head region along an axis. The pin includes a groove located between the first, proximal head region and the second, distal end region. A biasing element is disposed at least partially within the groove.

A dipper door trip assembly includes a dipper, a dipper door pivotally coupled to the dipper, a linkage assembly including a sliding latch bar disposed at least partially in the dipper door, and a latch keeper coupled to the dipper. The latch keeper includes a roller that engages and disengages the latch bar.

A dipper door trip assembly includes a dipper, a dipper door pivotally coupled to the dipper, a linkage assembly including a sliding latch bar disposed at least partially in the dipper door, and a latch keeper coupled to the dipper. The latch keeper includes a roller that engages and disengages the latch bar.

A method of operating an industrial machine. The method including controlling, via a controller, a movable component of the industrial machine based on a first signal received from an operator control and controlling, via the controller, the movable component of the industrial machine according to an autonomous operation in response to a second signal. The method further including adjusting the autonomous operation to generate an adjusted autonomous operation in response to receiving a third signal from the operator control and controlling, via the controller, the movable component of the industrial machine according to the adjusted autonomous operation in response to receiving a fourth signal.

A system and method for ground water protection below a pit mine that includes: a first back fill cover over an exposed ground water; layer of polystyrene foam; a rubber membrane placed over the first foam cover; closed cell extruded polystyrene foam placed over the rubber membrane; a layer of contaminated material over the closed cell extruded polystyrene foam, wherein the layer of contaminated material is covered by polystyrene foam, a rubber membrane and polystyrene foam over the rubber membrane; and top soil covering the layer of foam, rubber membrane and foam above the contaminated material.