초록 ▼

A new cementing system has been developed which includes, in certain embodiments, a plug container with a flow diverter for diverting a portion of flowing fluid away from plugs in the plug container; a plug set system with internal sleeves or dart receivers with shearable parts for shearing to selec

A new cementing system has been developed which includes, in certain embodiments, a plug container with a flow diverter for diverting a portion of flowing fluid away from plugs in the plug container; a plug set system with internal sleeves or dart receivers with shearable parts for shearing to selectively release plugs－all in certain embodiments made of non-metal material and/or plastic; and a swivel equalizer with internal valving to isolate a plug set (or any other item) from torque and to relieve pressure below the swivel equalizer.

대표청구항 ▼

A plug holding device for releasably holding a plug to a plug holder, the plug holder having a holder bore and a holder recess around the holder bore, the plug holder having holding apparatus releasably holding a plug, the plug having a plug bore therethrough in fluid communication with the holder b

A plug holding device for releasably holding a plug to a plug holder, the plug holder having a holder bore and a holder recess around the holder bore, the plug holder having holding apparatus releasably holding a plug, the plug having a plug bore therethrough in fluid communication with the holder bore, the plug holding device comprising a tubular sleeve with a sleeve bore disposable in fluid communication with the holder bore, the tubular sleeve having an external lock ring therearound and projecting therefrom for reception in the holder recess, the tubular sleeve positionable for preventing release of the holding apparatus from the plug, and the external lock ring shearable in response to pressure on the tubular sleeve, the tubular sleeve movable upon shearing of the external lock ring to permit movement of the holding apparatus to release the plug.