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US 10,208,545 B2Granted
Blade stabiliser tool for drill string
AssigneeEuropean Drilling Projects B.V.
InventorsMichael Thomas Newman, Ricardo Kok
Life of this patent
Estimating the term…
Abstract
A drilling string stabilizer tool comprises a cylindrical body and a plurality of stabilizer blades mounted on the outer surface of the cylindrical body. The stabilizer blades have an elongated shape and a monolithic structure with an upper stabilizing part and a lower mounting part. Between each two adjacent blades there can optionally be a hydrodynamic flute for improving the flow of liquid and cuttings during drilling and tripping.
Claims17
A stabiliser tool for a drilling string comprising:
- a cylindrical body defining a longitudinal axis X and having on its surface a plurality of longitudinal grooves each with a respective pin, each respective pin extending radially from a bottom surface inside a respective longitudinal groove of the plurality of longitudinal grooves, being elongated in a direction parallel to the longitudinal axis, and being an integral part formed from the same material as the cylindrical body, and a plurality of stabiliser blades having an elongated shape extending parallel to said longitudinal axis X and comprising a radially distal part and a radially proximal part, wherein the longitudinal extension of said radially distal part is shorter than the longitudinal extension of said radially proximal part, wherein said radially proximal part comprises a rectangular part and a tapered part located axially opposite to said rectangular part and provided with shank holes for a passage of fixing bolts on said rectangular part and tapered part, said radially proximal part being of complementary shape to one of the plurality of longitudinal grooves and having a longitudinal slot to engage one of said pins having complementary shape.
A stabiliser tool for a drilling string comprising:
- a cylindrical body defining a longitudinal axis X and having on its surface a plurality of longitudinal grooves each with a respective pin, each respective pin extending radially from a bottom surface inside a respective longitudinal groove of the plurality of longitudinal grooves and being elongated in a direction parallel to the longitudinal axis, and being integral and formed from the same material as the cylindrical body;
- a plurality of stabiliser blades having an elongated shape extending parallel to said longitudinal axis X and comprising a radially distal part and a radially proximal part, wherein the longitudinal extension of said radially distal part is shorter than the longitudinal extension of said radially proximal part, wherein said radially proximal part comprises a rectangular part and a tapered part located axially opposite to said rectangular part and provided with shank holes for a passage of fixing bolts on said rectangular part and tapered part, said radially proximal part being of complementary shape to one of the plurality of longitudinal grooves and having a longitudinal slot to engage one of said pins having complementary shape;
- and
- at least one shim positioned between the radially proximal part of at least one stabiliser blade of the plurality of stabiliser blades and the bottom surface inside the respective longitudinal groove, the shim including holes for passage of the fixing bolts and/or an opening complementary in shape to a respective pin and the pin extends through the shim.
1 more element
A stabiliser tool for a drilling string comprising:
- a cylindrical body defining a longitudinal axis X and having a plurality of longitudinal grooves each with a respective pin and a plurality of hydrodynamic flutes, each respective pin extending radially from a bottom surface inside a respective longitudinal groove of the plurality of longitudinal grooves and being elongated in a direction parallel to the longitudinal axis, and being integral and formed from the same material as the cylindrical body, each hydrodynamic flute being placed between two adjacent longitudinal grooves of said plurality of longitudinal grooves and being a milled channel interrupting a circular cross section of the cylindrical body, wherein each hydrodynamic flute is a rocket-shaped channel with a nose or cone at a front tail, and two diverging paths at a tail end;
- and
- a plurality of stabiliser blades having an elongated shape extending parallel to said longitudinal axis X and comprising a radially distal part and a radially proximal part, wherein the longitudinal extension of said radially distal part is shorter than the longitudinal extension of said radially proximal part, wherein said radially proximal part comprises a rectangular part and a tapered part located axially opposite to said rectangular part and provided with shank holes for a passage of fixing bolts on said rectangular part and tapered part, said radially proximal part being of complementary shape to one of the plurality of longitudinal grooves and having a longitudinal slot to engage one of said pins having complementary shape.
Dependencies are inferred from the claim text.