Abstract: Embodiments of the present invention generally relate to a method of treating a tubular string using a pigtrain. In one embodiment, a method of treating a tubular string includes injecting working fluid between a lead pig and a trail pig of a pigtrain. A bypass pig of the pigtrain is in a first position between the lead pig and trail pig and closer to the lead pig. The method further includes injecting propellant behind the trail pig, thereby driving the pigtrain through the tubular string. The bypass pig gradually moves from the first position to a second position closer to the trail pig, thereby agitating the working fluid.

Abstract: A method for deploying a sensor array into a wellbore, including inserting the sensor array into a secondary tubular coupled to a body at a surface of the wellbore, coupling the sensory array to the body, running the secondary tubular into a primary tubular fixed to the wellbore, engaging a latch mechanism located on the body with a mating element fixed to the primary tubular of the wellbore, and decoupling the secondary tubular from the body and retrieving the secondary tubular from the wellbore while the sensor array is held fixed by the latch.