Pemboran Coredrill

Most of the conventional coring expense is associated with rig time needed to trip the coring assembly in and out of the well. This applies particularly in exploration wells where core point determination is difficult or where reservoir sections are separated by long intervals. The CoreDrill® Coring system provides operators with the flexibility to core or drill ahead as desired, resulting in considerable savings for the operator.

Our CoreDrill Coring tools enable alternate drilling and coring without tripping the bottomhole assembly. The CoreDrill Coring system employs a core bit that converts to a drill bit and features an inner rod assembly that converts the system into a drilling tool for drilling down to, between and beyond core points. The inner rod assemblies for coring and drilling are conveyed in and out of the hole using conventional drill strings via braided or slick line.

The CoreDrill Coring system provides the industry's largest diameter core that can be retrieved through conventional tubulars, and is recognized as the first system to offer the drilling feature.

The standard 30 ft (9.1 m) CoreDrill Coring assembly uses a 6 ¼" x 2" barrel and a specially designed PDC plug. The assembly can operate in the 7 7/8" to 8 ¾" hole size range, and can be run in 15 ft (4.57 m) to 120 ft (36 m) lengths to deliver 2" diameter core. The CoreDrill Coring system can produce continuous core samples of superior quality compared to sidewall cores.

Service Application

The CoreDrill® Coring system is economically viable in applications where costs seem high with conventional coring systems. Coring-while-drilling provides high rates of penetration because of the high technology PDC bit design used, quick tool changes and no drill string trips to obtain core samples with minimal interruption of the drilling process.