Weatherford Technology Holdings, LLC

Weatherford/lamb, Inc.

Ram Kumar Bansal

Thomas Floyd Bailey

Richard J Segura

Lev Ring

David J Brunnert

David Pavel

Joe Noske

Andrew Antoine

David Iblings

Michael J Lynch

David Graham Hosie

Simon John Harrall

Don M Hannegan

Adrian Steiner

Mohammed Aleemul Haq

Gerald Wes Don Buchanan

Geoff George

Miroslav Mihalj

Tuong Thanh Le

Ian D Smith

Michael Brian Grayson

Francis X Bostick, Iii

Jack Allen

Allen Richard Young

Kenneth Edmund Rozek

Kenneth Michael Nero

Mark A Mitchell

David Michael Haugen

Kevin W Smith

Frederick Thomas Tilton

Michael W Lynch

David J Vieraitis

Bill Menard

Graham Alexander Skinner

Arthur Warren Meeks

Tom Fuller

Jerlib J Leal

David Peter Kippie

Roy W Rooyakkers

Justin Cunningham

Eisenhower De Leon

Bin Xiao

Gerald Wes Buchanan

Richard Segura

Thomas Bailey

Ian Smith

David Vieraitis

A mill for use in a wellbore includes a tubular housing having a bore therethrough, a plurality of pockets formed in a wall thereof, and a blade disposed in each pocket. Each blade includes a body having a first side opposite a second side, wherein the first side faces in a direction of rotation of the mill. The blade also includes a blade portion disposed on the first side of the body, wherein the blade portion has a first cutting face stepped relative to a second cutting face. Each blade is movable between a retracted position and an extended position, wherein a portion of the first side and the second side protrude from the housing in the extended position.

Section mill and method for abandoning a wellbore

A method of deploying a jointed tubular string into a subsea wellbore includes lowering the tubular string into the subsea wellbore from an offshore drilling unit. The tubular string has a slip joint. The method further includes, after lowering, anchoring a lower portion of the tubular string below the slip joint to a non-heaving structure. The method further includes, while the lower portion is anchored: supporting an upper portion of the tubular string above the slip joint from a rig floor of the offshore drilling unit; after supporting, adding one or more joints to the tubular string, thereby extending the tubular string; and releasing the upper portion of the extended tubular string from the rig floor. The method further includes: releasing the lower portion of the extended tubular string from the non-heaving structure; and lowering the extended tubular string into the subsea wellbore.

Heave compensation system for assembling a drill string

A mill for use in a wellbore includes a tubular housing having a bore therethrough and a plurality of eccentrically arranged pockets formed in a wall thereof and an arm disposed in each pocket. Each arm has a body portion and a blade portion extending from an outer surface of the body portion and is movable between an extended position and a retracted position. The mill further includes cutters disposed along each blade portion and a block disposed in each pocket and connected to the housing. Each block has a guide engaged with a mating guide of the respective body portion and an inner passage for providing fluid communication between the housing bore and the respective pocket. The mill further includes an actuator for extending the arms.

Milling system for abandoning a wellbore

A method for drilling a wellbore includes disposing a tubular string in the wellbore, wherein the tubular string includes a drill bit disposed at a bottom and a flow sub disposed on a top; injecting drilling fluid through a bore valve in the flow sub to rotate the drill bit; moving a sleeve in the flow sub to engage and close the bore valve; moving the sleeve independently from the bore valve to expose a flow port formed through a wall of the flow sub; and injecting the drilling fluid into the flow port while adding a stand to the top of the tubular string, wherein injection of drilling fluid into the tubular string is continuously maintained between drilling and adding the stand to the tubular string.

Three-way flow sub for continuous circulation

A method for milling a tubular cemented in a wellbore includes deploying a bottomhole assembly (BHA) into the wellbore through the tubular, the BHA comprising a window mill; and extending arms of the window mill and radially cutting through the tubular, thereby forming a window through the tubular, wherein a body portion of each window mill arm engages and stabilizes from an inner surface of the tubular after a blade portion of each window mill arm cuts through the tubular.

A flow sub for use with a drill string includes a tubular housing having a longitudinal bore therethrough and a flow port through a wall thereof and a ball. The ball is disposed in the housing above the flow port, has a bore therethrough, and is rotatable relative to the housing between an open position where the ball bore is aligned with the housing bore and a closed position where a wall of the ball blocks the housing bore. The flow sub further includes a seat disposed in the housing above the ball for sealing against the ball wall in the closed position and a sleeve disposed in the housing and movable between an open position where the flow port is exposed to the housing bore and a closed position where a wall of the sleeve is disposed between the flow port and the housing bore.

Continuous flow system for drilling oil and gas wells

A wellbore cleaning tool for removing irregularities along the inner surface of a wellbore tubular may include a top sub, a cutting assembly, and a bottom sub. The tool is operable to remove irregularities, such as debris, burrs, and jagged edges, along the inside of the wellbore tubular, and thereby provide a clean, inner surface finish. The tool may be actuated into a retracted position, an extended position, and/or a deactivated position.

Deburring mill tool for wellbore cleaning

A method for drilling a wellbore includes drilling the wellbore by advancing the tubular string longitudinally into the wellbore; stopping drilling by holding the tubular string longitudinally stationary; adding a tubular joint or stand of joints to the tubular string while injecting drilling fluid into a side port of the tubular string, rotating the tubular string, and holding the tubular string longitudinally stationary; and resuming drilling of the wellbore after adding the joint or stand.

Rotating continuous flow sub

A flow sub for use with a drill string includes: a tubular housing having a longitudinal bore formed therethrough and a flow port formed through a wall thereof; a bore valve operable between an open position and a closed position, wherein the bore valve allows free passage through the bore in the open position and isolates an upper portion of the bore from a lower portion of the bore in the closed position; and a sleeve disposed in the housing and movable between an open position where the flow port is exposed to the bore and a closed position where a wall of the sleeve is disposed between the flow port and the bore; and a bore valve actuator operably coupling the sleeve and the bore valve such that opening the sleeve closes the bore valve and closing the sleeve opens the bore valve.

A method for drilling a wellbore includes drilling the wellbore by injecting drilling fluid into a top of a tubular string disposed in the wellbore at a first flow rate and rotating a drill bit. The tubular string includes: the drill bit disposed on a bottom thereof, tubular joints connected together, a longitudinal bore therethrough, a port through a wall thereof, and a sleeve operable between an open position where the port is exposed to the bore and a closed position where a wall of the sleeve is disposed between the port and the bore. The method further includes moving the sleeve to the open position; and injecting drilling fluid into the port at a second flow rate while adding a tubular joint(s) to the tubular string. The injection of drilling fluid into the tubular string is continuously maintained between drilling and adding the joint(s).

Continuous flow drilling systems and methods

Growing community of inventors

Houston, TX, United States of America

Ram Kumar Bansal