Telescoping/release joint - Patent 1001132

(19)

(11)

EP 1 001 132 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	20.12.2000 Bulletin 2000/51

(43)	Date of publication A2:
	17.05.2000 Bulletin 2000/20

(21)	Application number: 99308661.0

(22)	Date of filing: 01.11.1999

(51)	International Patent Classification (IPC)⁷: E21B 17/07, E21B 17/06, E21B 33/124, E21B 43/116, E21B 43/119, E21B 43/26

(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:

03.11.1998 US 185383

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

(72)	Inventor:
	Huggins, Jeffry W. Grapevine, Texas 76051 (US)

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

(54)	Telescoping/release joint

(57) A downhole tool comprises a mandrel (120) having a radially reduced region (134) and a housing (108) slidably disposed exteriorly around the mandrel (120). A support ring (138) is initially disposed between the housing (108) and the mandrel (120). The support ring (138) supports an axial load between the housing (108) and the mandrel (120) until the relative axial movement between the housing (108) and the mandrel (120) shifts the support ring (138) into the radially reduced region (134). Thereafter, the downhole tool is telescopically extendable.

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