Patent ID: 9109431
Filing Date: 2015-08-18
Classification: E21B

Abstract:
1. A method, comprising: lowering a downhole tool via a pipe into a wellbore drilled through a formation via the pipe; performing a sticking test; estimating a maximum duration on station based on results of the sticking test and a sticking model; establishing a fluid communication between the downhole tool and the formation at a location in the wellbore; extracting from the formation a first fluid stream through the fluid communication and passing the first fluid stream through the downhole tool for a first duration, wherein the first duration has a predetermined length based on the estimated maximum duration on station; breaking the fluid communication between the downhole tool and the formation; moving the pipe in the wellbore, wherein moving the pipe in the wellbore comprises: reestablishing the fluid communication between the downhole tool and the formation essentially at the location in the wellbore subsequent to moving the pipe in the wellbore; extracting, from the formation, a second fluid stream through the fluid communication and passing the second fluid stream through the downhole tool for a second duration, wherein the second duration has a predetermined length based on the estimated maximum duration on station; and capturing, in the downhole tool, a fluid sample of the second fluid stream.