1, To reduce tripping time. By using wireline replacement than traditional drill with drill rod from about 5-10 times faster;
2, Save the
drill pipe and drill collars related procurement, transportation, inspection, maintenance and replacement costs;
3, Because there is always the wellbore casing, no longer have the time to drill down from the pumping action within the wellbore, the well control situation has improved;
4, Due to the elimination of the drill pipe from the pumping action and bring pressure pulsation;
5, Maintained when the wire rope from under the continuous circulation drill mud, cuttings prevents aggregation also reduces the occurrence of a kick;
6, To improve the return on annular velocity and cleaning the wellbore conditions. When the sleeve is pumped into the mud because of an inner diameter larger than the drill pipe, reducing the hydraulic losses, which can reduce the drilling rig mud pump with power. Mud returns from the annular space between the casing and the borehole wall, since the annulus area is reduced, improving the return on the speed and improve the drill cuttings taken out of the situation;
7, The size can be reduced rig, the rig structure to simplify and reduce the cost of drilling rig;
8, Rig more lightweight, easy to move and operate. Manual labor and costs are reduced.
