Abstract: A propulsion unit for a wellbore tool includes a tool body and at least one wheel section disposed along the tool body. The wheel section comprises a tractor pad movably coupled to a tractor housing coupled to the tool body. The tractor pad is movable only in a lateral direction with respect to the tool body. A wheel rotatably is supported in the tractor pad so as to contact a wall of a wellbore when the tractor pad is moved away from the tractor housing. An hydraulic motor is rotationally coupled to the wheel. The hydraulic motor comprises a displacement changing element operable to change displacement of the hydraulic motor. The unit comprises means for moving the tractor pad between an extended position and a retracted position.

Abstract: A computer-implemented method for designing a digital PCR (dPCR) experiment is provided. The method includes receiving, from a user, a selection of optimization type. The optimization type may be maximizing the dynamic range, minimizing the number of substrates including reaction sites needed for the experiment, determining a dilution factor, or determining the lower limit of detection, for example. The method further includes receiving, from the user, a precision measure for an experiment, and a minimum concentration of a target in a reaction site for the experiment. The method also includes determining a set of dPCR experiment design factors for the experiment based on the optimization type. The set of dPCR experiment design factors is then displayed to the user.

Abstract: A computer-implemented method for designing a digital PCR (dPCR) experiment is provided. The method includes receiving, from a user, a selection of optimization type. The optimization type may be maximizing the dynamic range, minimizing the number of substrates including reaction sites needed for the experiment, determining a dilution factor, or determining the lower limit of detection, for example. The method further includes receiving, from the user, a precision measure for an experiment, and a minimum concentration of a target in a reaction site for the experiment. The method also includes determining a set of dPCR experiment design factors for the experiment based on the optimization type. The set of dPCR experiment design factors is then displayed to the user.

Abstract: A propulsion unit for a wellbore tool includes a tool body and at least one wheel section disposed along the tool body. The wheel section comprises a tractor pad movably coupled to a tractor housing coupled to the tool body. The tractor pad is movable only in a lateral direction with respect to the tool body. A wheel rotatably is supported in the tractor pad so as to contact a wall of a wellbore when the tractor pad is moved away from the tractor housing. An hydraulic motor is rotationally coupled to the wheel. The hydraulic motor comprises a displacement changing element operable to change displacement of the hydraulic motor. The unit comprises means for moving the tractor pad between an extended position and a retracted position.

Abstract: A computer-implemented method for designing a digital PCR (dPCR) experiment is provided. The method includes receiving, from a user, a selection of optimization type. The optimization type may be maximizing the dynamic range, minimizing the number of substrates including reaction sites needed for the experiment, determining a dilution factor, or determining the lower limit of detection, for example. The method further includes receiving, from the user, a precision measure for an experiment, and a minimum concentration of a target in a reaction site for the experiment. The method also includes determining a set of dPCR experiment design factors for the experiment based on the optimization type. The set of dPCR experiment design factors is then displayed to the user.

Abstract: A flux application device is disclosed that allows users to solder copper pipe together with just one hand, thus the flux application device combines a brush and flux into one unit. The flux application device comprises a nozzle, a reservoir which typically comprises flux and is in fluid communication with the nozzle, and a brush head for applying the flux. The reservoir is a flexible reservoir containing flux that is secured to the nozzle to deliver the flux to a user. The flexible reservoir can be a reusable reservoir that a user would manually fill with flux, or a pre-filled replacement tube of flux.