Weatherford International Ltd.'s completion systems (WCS) division has installed 5-1/2-in. expandable sand screens (ESS), complete with enhanced connectors, in five wells for Phillips China Inc. in Bohai Bay in the North China Sea, about 150 mi east of Beijing.
"Phase 1 of ConocoPhillip's PL 19-3 operations in Bohai Bay consists of 24 wells," said Alistair Geddes WCS region director, "and provides a series of challenges due to a very complicated subsurface environment. The nature of the generally weak reservoir rock, much of it unconsolidated, means there can be severe sand control problems, and ESS definitely offers an effective solution for the operator. Our enhanced ESS 5 1/2-in. connector is now even quicker to install and offers increased strength and reliability for this application."
The first ESS installation was well A-6, a 9 5/8-in., cased hole perforated 40° incline, running to 1,750 m deep, with 21 ESS joints. ESS has also been installed in three other cased hole wells ? A-5, A-12, A-23 ? and in A-18, an open hole deviated well. A total of 104 ESS joints have been run to date. WCS is also supplying the EXP liner hanger packers for the ESS system, and Weatherford's drilling and intervention services division is providing the tubular management and fishing tools for the project.
Phillips China Inc. operates the PL 19-3 field with a 49% interest. Their partners China National Offshore Oil Corp. China Ltd. own 51%.