Method and system for estimating the position of a movable device in a borehole
AssigneeSchlumberger Technology Corporation
InventorHarry Barrow
Life of this patent
Estimating the term…
Abstract
A method is provided for estimating the position of a movable device in a borehole. The method comprises the steps of: (a) providing a prior location probability distribution associated with a first position of the device in the borehole, (b) providing a measurement of a putative distance moved by the device and/or a measurement of a characteristic of the surroundings of the device, the or each measurement being associated with movement of the device to a subsequent position in the borehole, and (c) calculating a posterior location probability distribution associated with the subsequent position, the posterior location probability distribution being conditional on the prior location probability distribution, and the or each measurement.
Claims12
A method for estimating the position of a movable device in a borehole, the method comprising the steps of:
- (a) providing a prior location probability distribution associated with a first position of the device in the borehole,
- (b) providing a measurement of a putative distance moved by the device and/or a measurement of a characteristic of the surroundings of the device, the or each measurement being associated with movement of the device to a subsequent position in the borehole, and
- (c) calculating a posterior location probability distribution associated with the subsequent position, the posterior location probability distribution being conditional on the prior location probability distribution, and the or each measurement.
Dependencies are inferred from the claim text.