Method and system for measuring a rheological transition level
AssigneeM.D.C.E. BVBA and Demco NV
InventorMarcus Philippus Maria Druyts
Life of this patent
Estimating the term…
Abstract
Method for measuring a rheological transition level between a first layer with first rheological properties, typically a fluid mud layer, and a second layer lying thereunder and having different, second rheological properties, typically a solid mud layer, wherein using a cable an object is lowered through the first layer into the second layer lying thereunder. A dynamic quantity of the moving cable with object, influenced by the rheological properties, or a change of this quantity, is measured. It is determined on the basis of this measurement when the object is located at the rheological transition level.
Claims20
A method for measuring a rheological transition level between a first layer with first rheological properties, typically a fluid mud layer, and a second layer lying thereunder and having different, second rheological properties, typically a solid mud layer, said method comprising:
- lowering an object through the first layer into the second layer lying thereunder, using a cable;
- measuring a dynamic quantity of the moving cable with object, influenced by the rheological properties, or a change of this quantity;
- and
- on the basis of this measurement determining when the object is located at the rheological transition level.
A system for measuring a rheological transition between a first layer with first rheological properties, typically a fluid mud layer, and a second layer lying thereunder and having second rheological properties, typically a solid mud layer, comprising:
- a lowering/hoisting device with a cable and with control means for controlling the lowering;
- an object connected to this cable and having an average density greater than that of the first and second layer;
- a measuring means for measuring a dynamic variable of the lowering/hoisting device influenced by the rheological properties, this such that it is possible to determine from the dynamic variable measured by the measuring means that the object is situated at the rheological transition level.
A sounding probe for measuring a rheological transition between a first layer with first rheological properties, typically a fluid mud layer, and a second layer lying thereunder and having second rheological properties, typically a solid mud layer, comprising:
- an elongate body with a probe tip;
- a measuring means for measuring a dynamic variable of the body when moving through the first and second layer, said dynamic variable being influenced by the rheological properties, such that it is possible to determine from the dynamic variable measured by the measuring means that the object is situated at the rheological transition level.
Dependencies are inferred from the claim text.