Method of treating a tubular string using a pigtrain
AssigneeMisc B.V.
InventorBruce A. Munden
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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.
Claims20
A method of treating a tubular string, comprising:
- injecting working fluid between a lead pig and a trail pig of a pigtrain, wherein a bypass pig of the pigtrain is in a first position between the lead pig and trail pig and closer to the lead pig;
- and
- injecting propellant behind the trail pig, thereby driving the pigtrain through the tubular string, wherein the bypass pig gradually moves from the first position to a second position closer to the trail pig, thereby agitating the working fluid.
Dependencies are inferred from the claim text.