Schlumberger Technology Corporation

The University of Texas System

Maxim Klyuzhev

Xuedong Yang

Todor K Sheiretov

Benjamin Jean Yvon Durand

Robert Kyle Wiesenborn

Pierre-arnaud Foucher

Joseph Matthew Casassa

Bilal Akin

Nikolay Baklanov

David Engel

Adam Cygan

Juan Jose Jaramillo

Rodrigo Feliu

Rishi Mishra

Idalia Stevenson

Mohammad Irfan Uddin

Michael Vince

Zhuangyao Tang

Maxim Gurevich

Systems and methods for downhole tubular cutting applications can include a cutting tool that with a cutting head, an anchor module, and a hydraulic module that actuates both. Arms of the anchor module open to an inner surface of a tube prior to blades of the cutting head opening to the inner surface. The blades can be operated by a piston. The piston can include a detent that travels across an actuation profile. This can allow a processor to track the cutting position. The processor can adjust the rotational speed of the blades based on feedback from the system.

Downhole tool for automatic tubular cutting

A method for milling and removing debris in a wellbore, comprising: moving a collecting while milling (CWM) tool downhole into the wellbore; and conducting a first operation with the CWM tool, wherein the first operation comprises: a first cycle including operating a motor of the CWM tool at a first torque and a first speed, wherein the first operation includes milling an obstruction in a wellbore; and a second cycle including operating the motor of the CWM tool at a second torque and second speed to power a centrifugal pump to circulate wellbore fluid through a bailer of the CWM tool to collect debris, wherein the first torque is greater than the second torque and the second speed is greater than the first speed.

Real time automated control method for wireline downhole debris collecting while milling operation

A measured electrical property may be used to control operation of a downhole device, which may be at least partially supported by additional downhole measurements consumed by the downhole device. For example, a downhole device may include an electrical sensor that measures an electrical property of electrical power provided to the downhole device. A processor of the downhole device may convert the measured electrical property to a quantized electrical property and determine a command or control action that corresponds to the quantized electrical property. The command or control action may be implemented to control operation of the downhole device.

Downhole device communication using measured electrical property of supplied power

A method of controlling a plurality of permanent magnet synchronous motors using a single inverter that includes obtaining an estimate of rotor position and speed individually for a plurality of permanent magnet synchronous motors. The method can include calculating the average rotor position from the obtained estimate of the rotor position for each permanent magnet synchronous motor of the plurality of permanent magnet synchronous motors. The method can include reconstructing a rotor permanent-magnet flux for each permanent magnet synchronous motor and transforming the reconstructed rotor permanent-magnet flux for each permanent magnet synchronous motor to average fluxes and average differential fluxes on an average d-q reference frame. The method can include obtaining the average current reference in the average d-q reference frame for the plurality of permanent magnet synchronous motors; and determining an inverter voltage reference.

Methods and systems for control of parallel connected motor drives

Systems and methods for driving a plurality of permanent magnet synchronous motors are provided. An embodiment of the system can include a first permanent magnet synchronous motor coupled to a first slip coupling, a second permanent magnet synchronous motor coupled to a second slip coupling, and the first permanent magnet synchronous motor and the second permanent magnet synchronous motor can be electrically connected in parallel on a bus.

Systems and methods for driving a plurality of motors

Growing community of inventors

Houston, TX, United States of America

Maxim Klyuzhev