Patent ID: 8146653

Claim:
A drilling strainer comprising a number of perforated rigid tubular modules ( 1 ) connected two by two in an airtight manner end to end by ball-joint articulation means ( 2 ) that allow an extracted fluid to circulate through all of said tubular modules in series and allow said consecutive modules to move freely relative to one other in tilting travel in all directions, and means to make integral all of said tubular modules ( 1 ) in rotation around the central axis of said strainer, formed by all of the axes of said tubular modules ( 1 ), further comprising engagement means comprising, for each pair of two consecutive modules ( 1 , 1 ′) of the series, complementary shapes provided at the ends respectively opposite a connecting sleeve ( 12 ) and an outside ring ( 6 ), respectively attached to the ends of said modules ( 1 , 1 ′) that are designed to be articulated by said articulation means ( 2 ), whereby said complementary shapes are arranged so as to cooperate with one another for mutual driving in rotation when a rotational movement around its axis (X, X′) is imparted to one of said modules ( 1 , 1 ′).