DEVICE FOR DRILLING WELL IN GROUND Russian patent published in 2004 - IPC

FIELD: building and mining equipment, particularly for trenchless underground service lines laying.

SUBSTANCE: device includes body and hammer with through longitudinal channel. Channel boring and air distribution means form inner chamber permanently connected with atmosphere. Air distribution device is made as two coaxial tubes and bush performing axial movement along inner tube. Inner tube has radial channels separated one from another by partition and is communicated with high-pressure air line. Formed in bush is boring having front end adjoining rear edge of radial channel of inner coaxial tube when hammer is installed in its front extreme position. Radial channel of inner coaxial tube is permanently communicated with through longitudinal hammer channel. Bush includes two parts connected one to another through resilient member.

EFFECT: increased reliability and efficiency.

2 cl, 1 dwg