Carl J Perry

US Patent:

7219752, May 22, 2007

Filed:

Nov 8, 2004

Appl. No.:

10/983486

Inventors:

Mark Ellsworth Wassell - Kingwood TX, US
William Evans Turner - Durham CT, US
Daniel E. Burgess - Middletown CT, US
Carl Allison Perry - Middletown CT, US

International Classification:

E21B 41/00

US Classification:

175321, 175 57, 175 61, 175 40, 166 665, 166 666, 1882671, 267125, 267137

Abstract:

A system for damping vibration in a drill string can include a valve assembly having a supply of a fluid, a first member, and a second member capable of moving in relation to first member in response to vibration of the drill bit. The first and second members define a first and a second chamber for holding the fluid. Fluid can flow between the first and second chambers in response to the movement of the second member in relation to the first member. The valve assembly can also include a coil or a valve for varying a resistance of the fluid to flow between the first and second chambers.

US Patent:

7377339, May 27, 2008

Filed:

Apr 19, 2007

Appl. No.:

11/737400

Inventors:

Mark Ellsworth Wassell - Kingwood TX, US
William Evans Turner - Durham CT, US
Daniel E. Burgess - Middletown CT, US
Carl Allison Perry - Middletown CT, US

Assignee:

APS Technology, Inc. - Wallingford CT

International Classification:

E21B 17/04
E21B 17/00

US Classification:

175322, 175321, 175323, 175106, 464 15

Abstract:

A system for damping vibration in a drill string can include a valve assembly having a supply of a fluid, a first member, and a second member capable of moving in relation to first member in response to vibration of the drill bit. The first and second members define a first and a second chamber for holding the fluid. Fluid can flow between the first and second chambers in response to the movement of the second member in relation to the first member. The valve assembly can also include a coil or a valve for varying a resistance of the fluid to flow between the first and second chambers.

US Patent:

7997357, Aug 16, 2011

Filed:

Apr 24, 2008

Appl. No.:

12/109328

Inventors:

Mark Ellsworth Wassell - Kingwood TX, US
William Evans Turner - Durham CT, US
Daniel E. Burgess - Middletown CT, US
Carl Allison Perry - Middletown CT, US

Assignee:

APS Technology, Inc. - Wallingford CT

International Classification:

E21B 28/00

US Classification:

175322, 267125

Abstract:

A system for damping vibration in a drill string can include a valve assembly having a supply of a fluid, a first member, and a second member capable of moving in relation to first member in response to vibration of the drill bit. The first and second members define a first and a second chamber for holding the fluid. Fluid can flow between the first and second chambers in response to the movement of the second member in relation to the first member. The valve assembly can also include a coil or a valve for varying a resistance of the fluid to flow between the first and second chambers.

US Patent:

8397562, Mar 19, 2013

Filed:

Jul 30, 2009

Appl. No.:

12/512740

Inventors:

Mark Ellsworth Wassell - Houston TX, US
Martin E. Cobern - Cheshire CT, US
Carl Allison Perry - Middletown CT, US

Assignee:

APS Technology, Inc. - Wallingford CT

International Classification:

E21B 44/00

US Classification:

7315248

Abstract:

An apparatus for measuring the bending on a drill bit operating down hole in a well may comprise at least three pockets circumferentially spaced equidistantly around the drill collar of the drill string to which the drill bit is attached. Four strain gauges are equidistantly circumferentially spaced around each of the pockets so as to form first and second sets of strain gauges. The strain gauges in the first set are connected into one Wheatstone bridge while the gauges in the second set are connected in a second bridge. Each of the strain gauges that are oriented similarly within each of the pockets are connected in series within a single leg of a bridge so that the output voltage of the bridge is unaffected by bending in the drill string. The output of first bridge is used to determine the bending on the drill bit. Further, an apparatus for measuring the bending, weight, and torque on a drill bit operating down hole in a well may comprise at least three pockets circumferentially spaced equidistantly around the drill collar of the drill string to which the drill bit is attached with twelve strain gauges that are equidistantly circumferentially spaced around each of the pockets so as to form first and second sets of strain gauges.

US Patent:

20130239674, Sep 19, 2013

Filed:

Feb 26, 2013

Appl. No.:

13/776705

Inventors:

MARK ELLSWORTH WASSELL - Houston TX, US
MARTIN E. COBERN - Cheshire CT, US
CARL ALLISON PERRY - Middletown CT, US

International Classification:

G01V 11/00

US Classification:

7315248

Abstract:

An apparatus for measuring the bending on a drill bit operating down hole in a well may comprise at least three pockets circumferentially spaced equidistantly around the drill collar of the drill string to which the drill bit is attached. Four strain gauges are equidistantly circumferentially spaced around each of the pockets so as to form first and second sets of strain gauges. The strain gauges in the first set are connected into one Wheatstone bridge while the gauges in the second set are connected in a second bridge. Each of the strain gauges that are oriented similarly within each of the pockets are connected in series within a single leg of a bridge so that the output voltage of the bridge is unaffected by bending in the drill string. The output of first bridge is used to determine the bending on the drill bit. Further, an apparatus for measuring the bending, weight, and torque on a drill bit operating down hole in a well may comprise at least three pockets circumferentially spaced equidistantly around the drill collar of the drill string to which the drill bit is attached with twelve strain gauges that are equidistantly circumferentially spaced around each of the pockets so as to form first and second sets of strain gauges. The arrangement of the twelve strain gauges allow for a bending on bit measurement that cancels out the affects of the weight on bit and torque on bit.