Abstract: A connector for connecting a first wellbore tubular to a second wellbore tubular includes a tubular housing connectable to the second tubular and an internal surface facing an internal bore, and a ramp assembly arranged around the surface having a plurality of elongate ramp arrays and a plurality of elongate channels arranged to separate adjacent ramp arrays. The connector includes a slip body which is insertable into the internal bore having an internal surface with at least one slip tooth for engaging the first tubular, an external surface and a ramp assembly arranged around the external surface having a plurality of elongate ramp arrays which grip the first tubular and a plurality of elongate channels arranged to separate adjacent ramp arrays. The ramp arrays of the slip body are each alignable with a respective channel of the tubular housing. The slip body is rotatable within the tubular housing.

Abstract: There is disclosed a milling apparatus (2) having a use in milling a window (88) in downhole tubing (1) located in a borehole (32) of a well. The milling apparatus comprises a main body (22) comprising an internal bore (42) defining a flow path through the body; a mill head (20) having at least one flow port (29); an internal chamber (15) which can contain a fluid, the internal bore of the main body defining at least part of the chamber; first (16) and second (23) seal assemblies disposed within the internal bore; and a communication port (17) located upstream of the second seal assembly. The seal assemblies are initially sealed relative to the main body, so that fluid communication along the internal bore past the seal assemblies is restricted and fluid contained in the chamber isolated from fluid external to the chamber.