TREA

Klaas Zwart

Follow

Person

  • Peterculter, GB
People

Patents Grantslast 30 patents

  • Information Patent Grant

    Downhole running system & method for setting a downhole tool in a bore
    • Patent number 5,538,082
    • Issue date Jul 23, 1996
    • Klaas J. Zwart
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Pack-off tool
    • Patent number 5,467,822
    • Issue date Nov 21, 1995
    • Klaas J. Zwart
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Retrievable bridge plug and a running tool therefor
    • Patent number 5,366,010
    • Issue date Nov 22, 1994
    • Klaas J. Zwart
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Centraliser
    • Patent number 5,355,950
    • Issue date Oct 18, 1994
    • Klaas Zwart
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Upstroke jar
    • Patent number 5,267,613
    • Issue date Dec 7, 1993
    • Petroline Wireline Services Limited
    • Klaas J. Zwart
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Quick-locking connector
    • Patent number 5,052,849
    • Issue date Oct 1, 1991
    • Petroline Wireline Services, Ltd.
    • Klaas Zwart
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Downhole lock assembly
    • Patent number 4,883,121
    • Issue date Nov 28, 1989
    • Petroline Wireline Services Limited
    • Klaas Zwart
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Wireline jar
    • Patent number 4,607,692
    • Issue date Aug 26, 1986
    • Klaas Zwart
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Device for temporarily sealing a pipe
    • Patent number 4,487,221
    • Issue date Dec 11, 1984
    • Klaas Zwart
    • E21 - EARTH DRILLING MINING