公开(公告)号：US11421506B2

公开(公告)日：2022-08-23

申请号：US17164871

申请日：2021-02-02

Applicant: ConocoPhillips Company

Inventor： Randall S. Shafer

IPC: E21B33/134 ,  E21B33/12 ,  E21B29/02 ,  E21B29/00

Abstract: A method for creating access to annular spacing during P&A operations is described. Specifically, helical coils are cut into one or more casings before the plugging material is set. The plugging material is able to exit the helical coils, forming multiple, small rock-to-rock seals.

公开(公告)号：US11274518B2

公开(公告)日：2022-03-15

申请号：US16784082

申请日：2020-02-06

Applicant: ConocoPhillips Company

Inventor： Randall S. Shafer

IPC: E21B33/134 ,  E21B33/12 ,  E21B29/02 ,  E21B29/00

Abstract: A method for creating access to annular spacing during P&A operations is described. Specifically, helical coils are cut into one or more casings before the plugging material is set. The plugging material is able to exit the helical coils, forming multiple, small rock-to-rock seals.

公开(公告)号：US10760375B2

公开(公告)日：2020-09-01

申请号：US16219010

申请日：2018-12-13

Applicant: ConocoPhillips Company

Inventor： Randall S. Shafer

IPC: E21B33/134 ,  E21B33/12 ,  E21B43/24 ,  E21B29/00 ,  E21B36/00

Abstract: A method of plugging a hydrocarbon well includes deploying a downhole tool to remove at least a portion of a casing at a section of well to be plugged. Deploying a blocking device downhole to block a bottom of the section of well to be plugged. Deploying a plugging material downhole onto the blocking device to fill an area to be plugged. Deploying an exothermic fluid downhole, wherein activation of the exothermic material liquefies the plugging material. Allowing the plugging material and the exothermic fluid to solidify form a cast-in-place plug that fills the section of well to be plugged.

公开(公告)号：US10738567B2

公开(公告)日：2020-08-11

申请号：US15717352

申请日：2017-09-27

Applicant: CONOCOPHILLIPS COMPANY

Inventor： Randall S. Shafer

IPC: E21B33/13 ,  E21B47/00 ,  E21B33/134 ,  E21B29/00 ,  E21B43/11

Abstract: Methods of plugging a hydrocarbon well by a through-tubing technique wherein the tubing is left in place, and only very short (

公开(公告)号：US20180148991A1

公开(公告)日：2018-05-31

申请号：US15706071

申请日：2017-09-15

Applicant: ConocoPhillips Company

Inventor： David D. Hearn ,  Casey HIRSCHMANN ,  Randall S. Shafer ,  Stewart M. ROBERTSON ,  Dan MUELLER

IPC: E21B33/12 ,  E21B36/00 ,  E21B47/10 ,  E21B33/13

Abstract: This disclosure describes a device and method of sealing perforations on a well casing inside a subterranean well. The device comprises a generally cylindrical sleeve having a open top and a closed bottom; a heater located inside the sleeve, the heater comprising a thermite mixture; an ignition mechanism that ignites the thermite mixture upon actuation; and a string connected to the heater ignition and detachably engages the sleeve. The method comprises lowering a body of meltable plugging material into the well casing near the perforations; lowering the plugging device into the well casing immediately on top of the body of meltable plugging material; melting the meltable plugging material by igniting the thermite thereby transferring heat to the body of meltable plugging material; forcing the molten plugging material into the perforations by pushing the plugging tool further downhole; cooling the plugging tool and the plugging material until the plugging material solidifies; disengaging the tubing string from the sleeve and retrieving the tubing string with the heater; and removing the sleeve and bismuth remaining in the well casing, but not in the perforations.

公开(公告)号：US20180094504A1

公开(公告)日：2018-04-05

申请号：US15705513

申请日：2017-09-15

Applicant: ConocoPhillips Company

Inventor： David D. Hearn ,  Casey HIRSCHMANN ,  Randall S. Shafer

IPC: E21B33/13

CPC classification number: E21B33/13 ,  E21B36/00 ,  E21B47/06

Abstract: A composition for a plug for wellbores undergoing plugging and abandonment operations is described. Methods of setting the plug are also described.