Multi-functional wellbore conditioning system
AssigneeEuropean Drilling Projects B.V.
InventorsTony Fitzgerald, Michael Thomas Newman
Life of this patent
Estimating the term…
Abstract
One-piece multi-functional wellbore conditioning system that combines reaming while drilling, wellbore conditioning, providing a plastering effect, improved stabilization and cleaning cuttings from a drilled hole. Said one-piece multi-functional wellbore conditioning system comprises two reamer stages and a drilling cuttings agitator positioned between the two reamer stages, wherein the drill cuttings agitator comprises a plurality of first, second and center stabilizing blades extending radially outwardly from the outer surface of the body of the drill cuttings agitator and a plurality of hydrodynamic flutes extending radially inwardly from the outer surface of the tubular body.
Claims14
A one-piece construction multi-functional wellbore conditioning system having a tubular body extending along a longitudinal axis X, said system comprising:
- a trailing eccentric reamer stage (3A),
- a leading eccentric reamer stage (3B), and
- a drill cuttings agitator (4) being positioned between said trailing and leading eccentric reamer stages,
- wherein said drill cuttings agitator (4) comprises:
- a plurality of first stabilizing blades (8) extending radially outwardly from an outer surface of the tubular body,
- a plurality of second stabilizing blades (10) extending radially outwardly from the outer surface of the tubular body,
- a plurality of center stabilizing blades (9) extending radially outwardly from the outer surface of the tubular body and arranged axially between the plurality of first stabilizing blades (8) and the plurality of second stabilizing blades (10), and
- a plurality of hydrodynamic flutes (7) extending in a longitudinal direction and extending radially inwardly from the outer surface of the tubular body,
- where each stabilizing blade of the plurality of first, second and center stabilizing blades (8), (9), (10) is disposed along a circumference coaxial with the tubular body at 90 degrees apart from each other and where the plurality of center stabilizing blades (9) is offset by 45 degrees from the preceding plurality of first stabilizing blades (8) and the following plurality of second stabilizing blades (10),
- said flutes being positioned circumferentially between the center stabilizing blades (9).
Dependencies are inferred from the claim text.