CA2195722A1 - Servo-driven mud pulser - Google Patents

Servo-driven mud pulser

Info

Publication number
CA2195722A1
CA2195722A1 CA002195722A CA2195722A CA2195722A1 CA 2195722 A1 CA2195722 A1 CA 2195722A1 CA 002195722 A CA002195722 A CA 002195722A CA 2195722 A CA2195722 A CA 2195722A CA 2195722 A1 CA2195722 A1 CA 2195722A1
Authority
CA
Canada
Prior art keywords
servo
pulser
valve
pressure pulse
fluid pressures
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002195722A
Other languages
French (fr)
Other versions
CA2195722C (en
Inventor
Terrence G. Frith
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Smith International Inc
Original Assignee
Thomas Tools Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US08/687,207 external-priority patent/US6016288A/en
Application filed by Thomas Tools Inc filed Critical Thomas Tools Inc
Publication of CA2195722A1 publication Critical patent/CA2195722A1/en
Application granted granted Critical
Publication of CA2195722C publication Critical patent/CA2195722C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

  • Servomotors (AREA)
  • Earth Drilling (AREA)

Abstract

An improved servo-driven pulser is disclosed, for use in measurement while drilling applications. In the pulser, a battery powered on-board DC electric motor is used to operate a servo-valve, which in turn adjusts internal tool fluid pressures to cause operation of a main valve to substantially reduce mud flow to a drill bit, thereby creating a positive pressure pulse detectable at the surface. De-energizing the motor driving the pilot valve results in re-adjustment of internal fluid pressures, causing the main valve to reopen, thereby terminating the pressure pulse.
CA 2195722 1996-07-25 1997-01-22 Servo-driven mud pulser Expired - Lifetime CA2195722C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/687,207 1996-07-25
US08/687,207 US6016288A (en) 1994-12-05 1996-07-25 Servo-driven mud pulser

Publications (2)

Publication Number Publication Date
CA2195722A1 true CA2195722A1 (en) 1998-01-26
CA2195722C CA2195722C (en) 2006-01-03

Family

ID=24759498

Family Applications (1)

Application Number Title Priority Date Filing Date
CA 2195722 Expired - Lifetime CA2195722C (en) 1996-07-25 1997-01-22 Servo-driven mud pulser

Country Status (1)

Country Link
CA (1) CA2195722C (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7564741B2 (en) 2004-04-06 2009-07-21 Newsco Directional And Horizontal Drilling Services Inc. Intelligent efficient servo-actuator for a downhole pulser
US7719439B2 (en) 2006-06-30 2010-05-18 Newsco Directional And Horizontal Drilling Services Inc. Rotary pulser

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7564741B2 (en) 2004-04-06 2009-07-21 Newsco Directional And Horizontal Drilling Services Inc. Intelligent efficient servo-actuator for a downhole pulser
US8203908B2 (en) 2004-04-06 2012-06-19 Newsco Directional Support Services Inc. Intelligent efficient servo-actuator for a downhole pulser
US7719439B2 (en) 2006-06-30 2010-05-18 Newsco Directional And Horizontal Drilling Services Inc. Rotary pulser

Also Published As

Publication number Publication date
CA2195722C (en) 2006-01-03

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Legal Events

Date Code Title Description
EEER Examination request
MKEX Expiry

Effective date: 20170123