Jing Meei Lu

US Patent:

20230065707, Mar 2, 2023

Filed:

Oct 20, 2022

Appl. No.:

18/048336

Inventors:

- Houston TX, US
Timothy Mark Miller - Klein TX, US
Jing Lu - Houston TX, US

International Classification:

F01C 1/10
E21B 4/02
F04C 2/107
F04C 13/00

Abstract:

Tapered stator designs are engineered in a positive displacement motor (PDM) power section to relieve stator stress concentrations at the lower (downhole) end of the power section in the presence of rotor tilt. A contoured stress relief (i.e. a taper) is provided in the stator to compensate for rotor tilt, where the taper is preferably more aggressive at the lower end of the stator near the bit.

US Patent:

20210310486, Oct 7, 2021

Filed:

Apr 2, 2021

Appl. No.:

17/221698

Inventors:

- Houston TX, US
Timothy Mark Miller - Klein TX, US
Jing Lu - Houston TX, US

International Classification:

F04C 2/107
E21B 4/02
F04C 13/00

Abstract:

Tapered stator designs are engineered in a positive displacement motor (PDM) power section to relieve stator stress concentrations at the lower (downhole) end of the power section in the presence of rotor tilt. A contoured stress relief (i.e. a taper) is provided in the stator to compensate for rotor tilt, where the taper is preferably more aggressive at the lower end of the stator near the bit.

US Patent:

20210080355, Mar 18, 2021

Filed:

Nov 13, 2020

Appl. No.:

17/098035

Inventors:

- Houston TX, US
Timothy Mark Miller - Klein TX, US
Jing Lu - Houston TX, US
Jonathan Jared McCalip - Spring TX, US
Jorge A. Gonzalez - Houston TX, US

International Classification:

G01M 99/00
F01C 1/02
F01C 20/28

Abstract:

An adapted elastomer compound, in which the adaptation is based at least in part on load performance data of a rotor/stator test coupon as evaluated on a test apparatus. The test coupon's stator section includes the original elastomer compound before adaptation thereof. The test apparatus includes a motor, a brake, and at least one sensor disposed to evaluate load performance data of the test coupon. The load performance data is the product of the process comprising the steps of: (a) rotating either the rotor section or the stator section on the test apparatus, wherein such rotation section actuates corresponding rotation of the other of the rotor section and the stator section; (b) applying a braking torque to the actuated rotor section or stator section; and (c) responsive to step (b), evaluating load performance data of the test coupon.

US Patent:

20190368974, Dec 5, 2019

Filed:

Aug 19, 2019

Appl. No.:

16/544600

Inventors:

- Houston TX, US
Timothy Mark Miller - Klein TX, US
Jing Lu - Houston TX, US
Jonathan Jared McCalip - Spring TX, US
Jorge A. Gonzalez - Houston TX, US

International Classification:

G01M 99/00
F01C 20/28
F01C 1/02

Abstract:

A method for evaluating load performance of a rotor/stator test coupon, advantageously within a sealable test chamber comprising test fluid. In some embodiments, the test coupon comprises at least a partial length of a PDM stage, and in others the test coupon comprises a splined rotor/stator. The method includes rotating either the rotor section or the stator section, wherein such rotation actuates corresponding rotation of the other of the rotor section and the stator section. on-linear torque in the form of an acceleration torque and/or a braking torque may be applied to either the rotor section or the stator section. Some embodiments include simulating downhole stall conditions via selectively engaging and disengaging a second motor and flywheel to vary rotational torque applied to the test coupon. Load performance of the test coupon may be evaluated over time in such simulated stall conditions.

US Patent:

20180223665, Aug 9, 2018

Filed:

Apr 9, 2018

Appl. No.:

15/948847

Inventors:

- Houston TX, US
Timothy Mark Miller - Klein TX, US
Jing Lu - Houston TX, US

International Classification:

F01C 20/28
G01M 99/00
G01M 15/02

Abstract:

A method for evaluating load performance of a rotor/stator test coupon, advantageously within a sealable test chamber comprising test fluid. In some embodiments, the test coupon comprises at least a partial length of a PDM stage, and in others the test coupon comprises a splined rotor/stator. The method includes rotating either the rotor section or the stator section, wherein such rotation actuates corresponding rotation of the other of the rotor section and the stator section. A braking torque is applied to the actuated one of the rotor section and the stator section such that load performance of the test coupon may be evaluated. Embodiments include selectively applying non-linear torque to load the test coupon, and evaluating load performance of the test coupon with reference to relative angular positions of the rotor section and the stator section over time.

US Patent:

20180216462, Aug 2, 2018

Filed:

Mar 28, 2018

Appl. No.:

15/938143

Inventors:

- Houston TX, US
Timothy Mark Miller - Klein TX, US
Jing Lu - Houston TX, US

International Classification:

F01C 20/28
G01M 99/00
F01C 1/10

Abstract:

A method for measuring load performance of a positive displacement motor (PDM) test coupon. The test coupon comprises a partial length of a PDM stage and is received inside a sealable test chamber. In some embodiments, the test coupon may be cut from a failed PDM stage. The test chamber is filled with test fluid. In some embodiments, the test fluid may be drilling fluid sampled from a live well. Rotation of the rotor on the test coupon actuates rotation of the stator. A braking torque is applied to the stator rotation, enabling evaluation of, for example, fatigue load performance of test coupon. Additional embodiments comprise the rotor axis and the stator axis being offset in order to simulate rotor/stator eccentricity in a full size PDM stage.

US Patent:

20170268339, Sep 21, 2017

Filed:

Mar 21, 2017

Appl. No.:

15/464640

Inventors:

- Houston TX, US
Timothy Mark Miller - Klein TX, US
Jing Lu - Houston TX, US

International Classification:

F01C 20/28
F01C 1/10
G01M 99/00

Abstract:

A method for measuring load performance of a positive displacement motor (PDM) test coupon. The test coupon comprises a partial length of a PDM stage and is received inside a sealable test chamber. In some embodiments, the test coupon may be cut from a failed PDM stage. The test chamber is filled with test fluid. In some embodiments, the test fluid may be drilling fluid sampled from a live well. Rotation of the rotor on the test coupon actuates rotation of the stator. A braking torque is applied to the stator rotation, enabling evaluation of, for example, fatigue load performance of test coupon. Additional embodiments comprise the rotor axis and the stator axis being offset in order to simulate rotor/stator eccentricity in a full size PDM stage.