公开(公告)号：US20180119692A1

公开(公告)日：2018-05-03

申请号：US15338350

申请日：2016-10-29

Applicant: KELVIN, INC.

Inventor： David BANGOR ,  Logan DUFFY ,  Adam GUETZ ,  Tim JACKSON ,  Robbie PRATT ,  Peter HARDING ,  Niall WELLS

IPC: F04B49/22 ,  E21B43/12 ,  F04B47/12 ,  E21B47/00 ,  G01V1/52

CPC classification number: F04B49/22 ,  E21B43/123 ,  E21B47/0007 ,  F04B47/02 ,  F04B47/12 ,  F04B49/065 ,  F04B2201/0202 ,  G01H1/00 ,  G01V1/52

Abstract: A method of probabilistically estimating a velocity of a plunger of a beam pump may comprise continuously monitoring well acoustics using a plurality of passive acoustic sensors attached to external structures of the beam pump; digitizing outputs of the plurality of passive acoustic sensors and sending the digitized outputs to a computing device for storage and processing; and using the digitized outputs of the plurality of passive acoustic sensors, estimating a probability of the velocity of the plunger using a hidden Markov model (HMM) to represent a probability of a position and the probability of the velocity of the plunger, the HMM comprising a state space model and an observational model.