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.

公开(公告)号：US11649389B2

公开(公告)日：2023-05-16

申请号：US17221155

申请日：2021-04-02

Applicant: ExxonMobil Technology and Engineering Company

Inventor： Peter A. Gordon ,  Thomas A. Petersen ,  Spencer A. White ,  Elizabeth L. Templeton-Barrett ,  Christian Mayer

IPC: C09K8/516 ,  E21B33/04 ,  E21B33/14 ,  E21B43/00 ,  C09K8/03

CPC classification number: C09K8/032 ,  C09K8/516 ,  E21B33/04 ,  E21B33/14 ,  E21B43/00

Abstract: A collection of compressible particles. The compressible particles are intended to be used for attenuating pressure build-up within a confined volume such as a trapped annulus in a wellbore. Each of the compressible particles is fabricated to collapse in response to fluid pressure within the confined volume, and comprises carbon. Particularly, each of the particles comprises a plurality of peripheral openings, permitting an ingress of wellbore fluids in response to an increase in pressure within a trapped annulus. The collection of compressible particles together has a reversible volumetric expansion/contraction of ≥10% and up to 25% at pressures up to 10,000 psi. A method of attenuating annular pressure buildup within a wellbore using the collection of compressible particles is also provided.