Fluid sample chamber with non-reactive lining

(19)

(11)

EP 0 999 348 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	29.11.2000 Bulletin 2000/48

(43)	Date of publication A2:
	10.05.2000 Bulletin 2000/19

(21)	Application number: 99308659.4

(22)	Date of filing: 01.11.1999

(51)	International Patent Classification (IPC)⁷: E21B 49/08

(84)	Designated Contracting States:
	AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
	Designated Extension States:
	AL LT LV MK RO SI

(30)

Priority:

02.11.1998 US 106752 P
20.07.1999 US 357416

(71)	Applicant: Halliburton Energy Services, Inc.
	Dallas, Texas 75381-9052 (US)

(72)	Inventors:
	Schultz, Roger L. Denton, Texas 76205 (US) Benge, James F. Longview, Texas 75604 (US) Stout, Christopher A. Janesville, WI 53545 (US)

(74)	Representative: Wain, Christopher Paul et al
	A.A. Thornton & Co. 235 High Holborn London WC1V 7LE London WC1V 7LE (GB)

(54)	Fluid sample chamber with non-reactive lining

(57) An apparatus for retaining a well-fluid sample and a method for using the same. The apparatus comprises a variable volume sample chamber having interior surfaces of a nonreactive material, such as a ceramic, the interior surfaces defining a cavity (222). The sample chamber comprises a tubular member, a piston (226) slidingly engaged in the tubular member operable in response to fluid pressure within the sample chamber, a passageway (260) defined in the sample chamber and adapted for providing fluid communication between the cavity (222) and an area exterior the sample chamber, and a valve assembly (254) operable for selectively opening and closing the passageway (260).

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