Removable SHIELDED drilling FILTER

摘要

The removable shielded drilling filter is used in water supply drilling and hydrogeological drilling. It has simplified construction and is arranged as a separate module. The removable shielded drilling filter comprises tubular filter (1) connected via thread (2) with fixing-feeding device, which has a body (3) with sectional shape and an upper end (6), housed in sleeve (5) of locking mechanism (4) , located in the upper part of the body (3). The upper end (6) is covered by a coil spring (7), housed in the sleeve (5) and clamped by a supporting nut (8). The sleeve (5) is connected via ribs with ring (10), covered by a ring (11), having a guide slit. The lower part of the locking mechanism (4) is a cylinder (12), housed in the upper part of the body (3) and centered on it through a slit (50) and screw (49). The body (3) is formed by a conical ring (17) extending in a horizontal ring (18), under which is situated a ring (19) with two seal (20) between which are passed four inclined channels (21) connecting the ring (19) with centrally located passage (22). The lower end of the body (3) has an external thread (23) and the upper end (6) has a connecting thread (24) for the drill rod (25). In the passageway (22) is housed closing sleeve (27) with radial holes (28) in which is placed a coil spring (29), standing on a pivot nut (30). In the lower part of the body (3) is formed an annular cavity (31), connected to the upper part of the body (3) via four channels (32). At the lower end of the tubular filter (1) is wrapped bottom (33) with return valve (34).