METHOD FOR DRILLING A WELL IN CONTINUOUS CIRCULATION AND DEVICE FOR INTERCEPTING AND REDISTRIBUTING FLUID USED IN THIS METHOD

摘要

A method for drilling a well in continuous circulation and a device for intercepting and redistributing fluids for this drilling method, comprising a main chamber (5) communicating with a first auxiliary chamber (6) and with a second auxiliary chamber (7), in which during the direct drilling flow (F1) mode, said auxiliary chambers (6,7) are placed in fluid communication with each other.;In relation to the prior art, the device and the method of the invention offer the advantage of significantly reducing localized wear on the system for intercepting and redistributing the drilling fluid, through exploitation of auxiliary chambers that are placed in fluid communication with one another and that thereby make it possible to sustain even the high flow rates required for wells of larger dimensions and/or that use bottom hole equipment to impart rotation to the drill bit (normally hydraulic motors or turbines).

主权项

1. Device for intercepting and redistributing drilling fluid in drilling procedures for drilling a well in continuous circulation of said fluid, produced by means of a direct flow (F1) and a radial flow (F3) to the string of drill rods (17), of the type comprising a main chamber (5) that communicates with a first auxiliary chamber (6) and with a second auxiliary chamber (7), characterised in that in the aforesaid direct flow drilling mode (F1) said auxiliary chambers (6, 7) are placed in fluid communication with each other.