A Hybrid Multilateral System Provides Mechanical and Hydraulic Isolation Without Cement

Abstract

TX 75083-3836, U.S.A., fax 01-972-952-9435. AbstractIn the last two years, there has been a dramatic increase in the availability and complexity of multilateral systems. Many systems with new features and improved functionality have been introduced which have enhanced the application of multilateral technology. This system is among the latest of these offerings. This innovative system is a hybrid, TAML Level 5, that provides mechanical and hydraulic isolation at the created multilateral junction without cement, and re-entry capabilities into both the main and lateral well bores. This system also is very mechanically simple to run, utilizing a minimal number of trips to establish the junction and achieve mechanical and hydraulic isolation. Primarily designed for heavy oil applications where sand control is an issue, the system has potentially far reaching applications in this and other markets.The paper will describe the mechanical and operational functionality of the system and its' potential applications. Results of bench and field tests will also be documented and analyzed.

Mature Field Re-entries Utilizing Level 4 Multilateral Technology

“…Early systems were perceived as being too complex (risky) operationally and time consuming (expensive) for broad implementation. 7 This TAML level 4 junction provides mechanical stability, hydraulic isolation and more importantly mechanical connectivity back to the mainbore and is built around the proven concept of a hollow whipstock. The hollow whipstock technology has been significantly improved allowing for highpressure capability before and after milling the window.…”