165 / 2013-05-06 16:43:18

Numerical Study On The Initial Pumping Process Of The Cable-in-ct Installation

Coiled Tubing, Cable, Pumping, Installation

Inject cable into Coiled Tubing is an important guarantee of the oilfield smart job to supply electrical power and signals down hole to collect and manipulate the real time data. Pumping fluid to inject cable into a reel of CT is a new method for the installation. While pump-in, cable was floated under the drag force on its surface in the turbulent fluid. Here how to realize the injection in the initial segment is crucial to the whole installation process. After a brief introduction of the pumping method and device for the installation, the main work focused on the initial injecting process. This paper modeled the initial injecting segment in the horizontal status, simulated the pumping process by finite element software and then derived the data from the post processing software to analyze the process. Besides, it also carefully analyzed the effect of the different flow velocities in the annulus and the total force on cable. After the numerical study, the related parameters and functions for the injecting operation like pumping rate and working pressure were obtained. The theoretical analysis and analog results verified the feasibility of the pumping method for the cable-in-CT system. When compared with other conventional ways, injecting cable by pumping fluid is more economic and more adaptable in oil field operation, especially in operations on offshore platform.