Schlumberger Technology Corporation

Smith International, Inc.

Services Petroliers Schlumberger

Balasubramanian Durairajan

Michael George Azar

David R Hall

Scott Steven Dahlgren

Youhe Zhang

Madapusi K Keshavan

Yuelin Shen

Jonathan D Marshall

Geoffrey Charles Downton

Yuri Y Burhan

Chen Chen

Philip G Trunk

Sandeep Tammineni

Somasundaram Valliyappan

Jason Gregg

Ambalavanan Sachidanandam

John J Pierce

Stephen Michael Cordes

Rahul Bijai

Alexei Jozef Barr

Joshua J Hanson

Andrew Dow

Crystal Brown Mayer

Carlos Alberto Armada

James Masdea

Jordan Mark Self

Keisha Marie Spagnoletti

Thirugnanasambandam Vasudevan Chandsudan

Elson Lim

Davide Fanti

A ringout detection system may receive a plurality of surface weight-on-bit (SWOB) measurements from a surface weight-on-bit (WOB) sensor and a plurality of downhole weight-on-bit (DWOB) measurements from a downhole WOB sensor. A ringout detection system may identify a decrease in a WOB ratio between the plurality of SWOB measurements and the plurality of DWOB measurements. A ringout detection system may determine that the decrease in the WOB ratio exceeds a WOB ratio threshold. A ringout detection system may identify that ringout has occurred at the reamer based at least in part on the decrease in the WOB ratio.

Detecting ringout on an expandable tool

A method includes simulating a cutting tool drilling an earth formation by incrementally rotating the cutting tool at a plurality of time intervals, determining a true trajectory of a cutting element disposed on the cutting tool for the duration of the plurality of time intervals, and determining a dynamic work profile for the cutting element based on the true trajectory and a force acting on the cutting element at each time interval.

Method of designing and optimizing fixed cutter drill bits using dynamic cutter velocity, displacement, forces and work

A drill bit for drilling a borehole in earth formations may include a bit body having a bit axis and a bit face; a plurality of blades extending radially along the bit face; and a plurality of cutting elements disposed on the plurality of blades, the plurality of cutting elements comprising: at least one cutter comprising a substrate and a diamond table having a substantially planar cutting face; and at least two non-planar cutting elements comprising a substrate and a diamond layer having a non-planar cutting end, wherein in a rotated view of the plurality of cutting elements into a single plane, the at least one cutter is located a radial position from the bit axis that is intermediate the radial positions of the at least two non-planar cutting elements.

Kerfing hybrid drill bit and other downhole cutting tools

A downhole cutting tool includes a body having a central axis extending therethrough, a plurality of blades extending outwardly from the body and converging towards a central region around the central axis, and at least one cutting element having a longitudinal axis, a non-cylindrical substrate, and an ultra-hard material body on the non-cylindrical substrate, the ultra-hard material body having a side surface extending around a cutting face and defining a cross-sectional shape of the ultra-hard material body, and the side surface comprising an edge having an inner angle of less than 180 degrees.

Fixed cutter bits and other downhole tools having non-planar cutting elements thereon

A cutting element includes a cutting end extending a depth from a cutting face to an interface surface opposite from the cutting face, and a spindle, the spindle axially separated from the cutting end by a transition region. The spindle has a spindle diameter measured between a spindle side surface, which is less than a cutting end diameter. A guide length, measured from a point of transition to the transition region to a retention feature, is longer than 75% of a total length of the spindle.

Rolling cutter stability

A drill bit may include a bit body and at least two cones assemblies including at least two drive cylinders having at least two cones. The at least two cone assemblies are mounted on the bit body. The drill bit may also include an indexing mechanism coupled to the bit body and configured to rotate and lock at least one drive cylinder. A method of operating the drill bit may include providing fluid to the drill bit, rotating the drill string to drill formation, moving the indexing mechanism an axial distance within a central chamber of the drill bit, rotating the at least two indexable structures as the indexing mechanism moves, and locking the at least two indexable structures.

Indexing drill bit

Growing community of inventors

Sugar Land, TX, United States of America

Balasubramanian Durairajan