[57] ABSTRACT A communications network has a plurality of nodes inter connected by an
optical transmission medium. The trans mission medium is capable of a carrying a plurality …

(57) ABSTRACT A method and System for accessing Subterranean Zones from the surface
includes a substantially vertical well bore extending from the Surface to a target Zone, and …

An optical wavelength add/drop multiplexer provides communications between two optical
links supporting wavelength division multiplexing (WDM). A wavelength slicer spatially …

An optical cross-connect for the Switching of optical chan nels at variable bit-rate (up to 10
Gbit/s), wavelength divi Sion multiplexed on bi-directional optical fibers forming the …

A method and system for accessing subterranean zones from the surface includes a
substantially vertical well bore extending from the surface to a target zone, and an …

In accordance with one embodiment of the present invention, a method for drilling wellbores
includes drilling a main wellbore, disposing a casing string having a deflecting member at a …

In accordance with one embodiment of the present invention, a method for drilling wellbores
includes drilling a main wellbore and disposing a casing string in the main wellbore. The …

5,402.256 A 3/1995 Spanke 5,414.548 A 5, 1995 Tachikawa et al. A photonic integrated
circuit (PIC) device is described. The 5,416,625 A 5, 1995 Cavaciuti et al. PIC device …

4,626,075 A 12/1986 Chemla 4,726,010 A 2f1988 Ali et al. 5,170,273 A 12, 1992 Nishio 5,
191,457 A 3, 1993 Yamazaki 5, 194977 A 3, 1993 Nishio 5,319,484 A 6, 1994 Jacob et al …

(73) Assignee: CDX Gas, LLC, Dallas, TX (US)(List continued on next page.)(*) Notice:
Subject to any disclaimer, the term of this FOREIGN PATENT DOCUMENTS patent is …