Patent ID: 9255376
Filing Date: 2016-02-09
CPC Classification: E02D,E02F,E21B

Claim Text:
1. A multipurpose rod adapted for assembly with other multipurpose rods to form a modular system for drilling soil; said rod defining an internal passage extending along an entire length of said rod for passage of at least a cement mixture under pressure, said rod comprising: a substantially cylindrical shape and a substantially constant external diameter; a male insert and a female insert at opposite ends of said rod, adapted to be plugged in one to the other for permitting assembly in a battery of rods of any length; an external structural pipe to which said male insert and the female insert are fixed; an inner pipe fixed to said male insert and said female insert, said inner pipe contributes to tensile structure of the rod with the external pipe; said inner pipe defining at least part of said internal passage having a cylindrical shape and constant section at least between said male insert and said female insert along the length of said rod; both said external pipe and said inner pipe have a constant cylindrical shape; the inserts of the ends of said rod being provided with means adapted for transmitting rotation along the whole battery; said rod further comprising prearrangements for a connection system configured for removably connecting a further pipe in order to reduce the internal passage of said inner pipe of said rod; wherein said prearrangements for a connection system are placed both in the male insert and in the female insert, said prearrangements being configured to connect reference flanges in order to ensure centering between the further pipe and the inner pipe of the rod; wherein said inserts define spaces adapted for mounting pins to hold the rod to the other rods to create the battery; and wherein the pins extend no further than an external diameter of the rods and have an axis substantially transverse to a longitudinal direction of the rod.