CA2195722C - Generateur d'impulsions servocommande pour mesurer la pression des boues en cours de forage
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Generateur d'impulsions servocommande pour mesurer la pression des boues en cours de forage
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Publication number
CA2195722C
CA2195722CCA 2195722CA2195722ACA2195722CCA 2195722 CCA2195722 CCA 2195722CCA 2195722 CA2195722 CA 2195722CA 2195722 ACA2195722 ACA 2195722ACA 2195722 CCA2195722 CCA 2195722C
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CA
Canada
Prior art keywords
main
assembly
main valve
orifice
pilot valve
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.)
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
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Filing date
Publication date
Priority claimed from US08/687,207external-prioritypatent/US6016288A/en
Application filed by Thomas Tools IncfiledCriticalThomas Tools Inc
Publication of CA2195722A1publicationCriticalpatent/CA2195722A1/fr
Application grantedgrantedCritical
Publication of CA2195722CpublicationCriticalpatent/CA2195722C/fr
CA 21957221996-07-251997-01-22Generateur d'impulsions servocommande pour mesurer la pression des boues en cours de forage
Expired - LifetimeCA2195722C
(fr)
Methodes et systemes de creation d'impulsions de pression destines a la telemetrie par impulsion pour les outils de mesure de fond pendant le forage employant un belier hydraulique a entrainement direct