公开(公告)号：US11719056B2

公开(公告)日：2023-08-08

申请号：US17479114

申请日：2021-09-20

Applicant: ExxonMobil Technology and Engineering Company

Inventor： Catalin D. Ivan ,  William C. Morris, Jr. ,  Jason Z. Gahr ,  Patrick E. Goschy

IPC: E21B21/08 ,  E21B49/00 ,  E21B27/00 ,  E21B21/00 ,  G01H1/00

CPC classification number: E21B21/08 ,  E21B21/002 ,  E21B27/00 ,  E21B49/003 ,  G01H1/003

Abstract: Techniques described herein relate to a method for identifying downhole conditions during a drilling operation using a vibratory separator. The method includes calibrating a sensor system attached to the vibratory separator by periodically measuring the G-force acting on the vibratory separator functioning under steady-state operating parameters. The method also includes determining the relationship between the G-force acting on the vibratory separator and the flow rate and rate of penetration (ROP) for the drilling operation by measuring the G-force acting on the vibratory separator functioning under different non-steady-state operating parameters. The method further includes determining an expected total basket weight for each G-force measurement using the G-force/flow rate/ROP relationship, monitoring a current total basket weight of the vibratory separator functioning under current operating parameters, and identifying a downhole condition if the current total basket weight is greater or less than the expected total basket weight for the current operating parameters.

公开(公告)号：US11814932B2

公开(公告)日：2023-11-14

申请号：US17221132

申请日：2021-04-02

Applicant: ExxonMobil Technology and Engineering Company

Inventor： Spencer A. White ,  Thomas A. Petersen ,  Elizabeth L. Templeton-Barrett ,  Sabine C. Zeilinger ,  Catalin D. Ivan ,  Peter A. Gordon ,  Christian S. Mayer

IPC: E21B33/122 ,  E21B41/00 ,  F16F9/00 ,  F16L57/02

CPC classification number: E21B41/0021 ,  E21B33/122 ,  F16F9/006 ,  F16L57/02 ,  F16F2222/02 ,  F16F2224/005 ,  F16F2228/007 ,  F16F2230/0023

Abstract: A method of attenuating annular pressure buildup within a wellbore. The method includes accessing a wellbore, with the wellbore having an annulus disposed between first and second strings of casing. The method also includes placing a column of cement around the second string of casing generally below the first string of casing. The method further includes pumping a fluid mixture into the annulus, forming a fluid column. The fluid mixture comprises a carrier fluid, and a plurality of compressible particles dispersed in the carrier fluid. Each of the compressible particles is fabricated to partially collapse in response to thermal expansion of the fluid mixture. The method also includes placing a wellhead over the wellbore, thereby forming a trapped annulus in the wellbore. The method additionally includes at least partially sealing the annular region along at least one depth above the column of cement to inhibit vertical migration of the compressible particles.