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Apparatus for injecting displacement plugs

  • US 5,004,048 A
  • Filed: 11/15/1989
  • Issued: 04/02/1991
  • Est. Priority Date: 11/15/1989
  • Status: Expired due to Fees
First Claim
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1. An apparatus for injecting cement displacement plugs into a well bore for cementing casing comprising:

  • (a) a well bore casing with an upper inlet and a lower outlet;

    (b) a manifold comprising a housing provided with an inlet and an outlet connected by a flow passage through the housing;

    (c) at least one launching cylinder comprising a housing provided with an interior bore connected with said flow passage;

    (d) a spring loaded injection piston mounted within said launching housing;

    (e) pick up means for insertion into said interior bore;

    (f) releasable retaining means for selectively releasing said pick up means;

    (g) means for remote mounting of said manifold and means for connection of said manifold to said well bore; and

    ,(h) means for a remote actuation of said injection piston, and means for remote actuation of said retaining means.

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