MULTISTAGE HIGH PRESSURE FRACTURING SYSTEM WITH COUNTING SYSTEM

摘要

The invention relates to a multistage high pressure fracturing system and tubular hydraulic valve (THV) system for connection to a completion string to enable isolation of a zone of interest within a well. In particular, the system enables access to a downhole formation for fracturing the zone of interest and for hydrocarbon production. The system generally includes a plug counting system, a plug capture system and a valve system wherein dropping a series of plugs down the completion string enables successive capture of individual plugs within individual THVs for subsequent fracturing operations.

主权项

1. A tubular hydraulic valve (THV) system for connection to a tubing string to enable isolation of a zone of interest within a well, to enable access to a downhole formation for fracturing the zone of interest and for hydrocarbon production, the THV having an internal bore enabling a plug to pass through the THV, the THV comprising:
a plug counting system having an uphole end for connection to a tubing string and a plug engagement system for engagement with a plug passing through the internal bore, the plug engagement system for counting successive plugs passing through the plug counting system and for triggering a first hydraulic event when a pre-set number of plugs passing through the internal bore is reached; a plug capture system operatively connected to the plug counting system, the plug counting system responsive to the first hydraulic event to effect plug capture within the THV when the first hydraulic event is triggered; a valve system operatively connected to the plug counting system and plug capture system, the valve system including a valve responsive to plug capture to open the valve to enable fluid flow from the internal bore to the exterior of the THV.