Dynamic fluid loss cell apparatus and method thereof
AssigneeHalliburton Engergy Services, Inc.
InventorsVoldi E. Maki, Jr., Fred L. Sabins
Life of this patent
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Abstract
A dynamic fluid loss cell apparatus and method for measuring filter-cake build-up on a simulated core of the well-bore and for measuring the effectiveness of a spacer fluid to remove filter-cake. There is also provided, a dynamic fluid loss cell apparatus and method for measuring the dynamic fluid loss during the simulated build-up and removal of the filter-cake. The apparatus and method further provides for performing the measurements under various conditions including temperature and differential pressure.
Claims17
A dynamic fluid loss cell apparatus, comprising:
- (a) a cell for receiving a first fluid and a core, wherein said core has a first side and a second side;
- (b) a pressurizing element operable for creating pressure differential between the first side and the second side;
- (c) a flow mechanism operable to flow said first fluid about the first side, the first fluid being selected from the group of a first drilling fluid, a second drilling fluid, and a spacer fluid;
- and
- (d) an acoustic measurement device operable to measure a first portion of the first drilling fluid on the first side, the measurement device including a transducer for transmitting a first acoustic signal and receiving a second acoustic signal.
A method for dynamically simulating fluid loss in a well-bore, comprising:
- (a) receiving a core into a cell, wherein said core has a first side and a second side;
- (b) receiving a first fluid into the cell;
- (c) creating a pressure differential between the first side and the second side;
- (d) flowing the first fluid about the first side bv rotating a rotating sleeve having an acoustic window and transmitting a first acoustic signal through the acoustic window;
- and
- (e) acoustically measuring a layer of particles on the first side.
A dynamic fluid loss cell apparatus, comprising:
- (a) a cell for receiving a core and a first fluid, wherein said core has a first side and a second side and said first fluid is selected from the group of a drilling fluid and a spacer fluid;
- (b) a pressurizing element for creating a pressure differential between the first side and the second side;
- (c) a rotating sleeve about the core, wherein the rotating sleeve has an acoustic window;
- (d) a transducer for transmitting a first acoustic signal and receiving a second acoustic signal to measure a filter-cake layer;
- (e) a delay line separating the transducer and the first fluid;
- (f) a fluid discharge operable for flowing a portion of the first fluid from the second side to outside the cell;
- and
- (g) an optical switch operably connected to the transducer.
Dependencies are inferred from the claim text.