Apparatus for injecting fluid into a wellbore

(19)

(11)

EP 0 722 037 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	02.01.1997 Bulletin 1997/01

(43)	Date of publication A2:
	17.07.1996 Bulletin 1996/29

(21)	Application number: 96300274.6

(22)	Date of filing: 12.01.1996

(51)	International Patent Classification (IPC)⁶: E21B 33/16

(84)	Designated Contracting States:
	DE FR GB IT NL

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Priority:

13.01.1995 US 372546
08.11.1995 US 555193

(71)	Applicant: HALLIBURTON COMPANY
	Duncan Oklahoma 73536 (US)

(72)	Inventors:
	Streich, Steven G. Duncan, Oklahoma 73533 (US) Sullaway, Bobby L. Duncan, Oklahoma 73533 (US) Berscheidt, Kevin T. Duncan, Oklahoma 73533 (US)

(74)	Representative: Wain, Christopher Paul et al
	A.A. THORNTON & CO. Northumberland House 303-306 High Holborn London WC1V 7LE London WC1V 7LE (GB)

(54)	Apparatus for injecting fluid into a wellbore

(57) An apparatus for injecting fluid into a wellbore. The apparatus comprises a housing (12) and a valve sleeve (50). The housing (12) has a chamber (36) and a port (30) in communication with the chamber (36). The chamber (36) is adapted to hold a first fluid, such as a cement accelerant, therein. The valve sleeve (50) serves to open the port (30) so that the fluid first fluid is free to flow out of the chamber (36) through the port (30) in response to the flow of a second fluid, such as cement. A portion of the valve sleeve (50) extends below the housing (12) so that when the valve sleeve (50) engages a surface therebelow, the valve sleeve (50) is forced upwardly to open the port (30). The housing (12) and/or the valve sleeve (50) may be made of a on-metallic material in order to facilitate drilling of the apparatus.

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