Abstract: A method of treating a valve with a coating, such as hardfacing, that includes depositing the coating with a spray stream that is oriented perpendicular to the surface being treated. The method further includes applying a coating of uniform thickness onto lateral surfaces of a valve seat, a portion of the valve seat bore, and the interface between a valve seat lateral surface and the valve seat bore. The valve seat bore can include an annular recess formed to receive a layer of coating.

Abstract: A subsea production system adapted for wireless communication so that production tree operation can be controlled locally wirelessly from a workover umbilical or remotely controlled vehicle. The production system includes a wellhead assembly and an umbilical termination connected to an umbilical that extends to above the sea surface. Dedicated wireless communication devices can be attached to one or both of the wellhead assembly and the umbilical termination. The wireless communication devices can include a radio frequency modem, a sonar device, an infrared communication device, a light emitting diode, an optical modem, and combinations thereof; the wireless communication can include radio frequency waves, acoustic waves, and electromagnetic waves. A subsea control module can be included for controlling/actuating devices in or associated with the production system. The subsea control module can be adapted for wireless communication.

Abstract: A method and apparatus are provided for drilling multiple offshore wells from a single conductor casing string. A guide member is provided for securing to a standard casing string, and running downhole and setting within a lower section of the conductor string. The guide member includes multiple guide bores through which standard casing strings are run. A first one of the standard casing strings i secured into one of the multiple guide bores for lowering the guide member into the lower section of the conductor string. A multibore low pressure wellhead housing is mounted to the conductor string as the guide member is being lowered downhole within the conductor string. Once the guide member is set, the first one of the standard casing strings is released from the guide member and passed downward through the guide member for receiving a drill string and guiding the drill string in drilling a first one of the multiple offshore wells.

Abstract: An emergency casing hanger and packoff allows casing to be set when it has been stuck. The hanger has a slip body that slides over the casing after the casing is cut. The slip body lands in a wellhead housing. The slip body has a bowl which carries slips for gripping the casing. A split ring carried by the body engages a recess in the wellhead housing to lock the hanger in place. A wedge moves the split ring outward when rotated by a running tool. An energizing ring carried by the slip body moves the slips downward to energize them. The packoff has a metal seal ring with an annular cavity, defining inner and outer faces. The inner face contains a plurality of deformable bands. A wedge member urges the faces apart, causing the bands to deform and seal against the casing.