[12] Patent
[11] Patent No.:GC0007630  
[45] Date of Publishing the Grant of the Patent: 30/Apr /2018                48/2018  
Number of the Decision to Grant the Patent:2018/126255
Date of the Decision to Grant the Patent:22/Apr/2018

[21] Application No.:GC 2015-29235

[22] Filing Date:16/4/2015

[30] Priority:

[33] State [32] Priority date [31] Priority No.

[72] Inventor: William Michel

[73] Owner: BP Corporation north America Inc, 501 Westlake Park Boulevard, Houston 77079 , Texas , USA

[74] Agent: Saud M. A. Shawwaf Law Office




Int. Cl.: E21B 43/129, 43/38; F04B 1/02, 19/22 (2006.01)

[56] Cited Documents:

-US 2013/299182 A1 (COYLE ROBERT A [US] ETAL) 14 November 2013
-US 4 486 152 A (POREL LOUIS-CLAUDE [FR])4 December 1984
-US 2007/110597 A1 (TRAYLOR LELAND B [US]ET AL) 17 May 2007
-US 2004/042906 A1 (GLEASMAN VERNON E [US]ET AL) 4 March 2004
-US 4 867 242 A (HART GORDON E [CA])19 September 1989
Examiner: Eng. Mohammed A. AlShamrani

[57] Abstract: A piston includes a piston housing and a decompression valve disposed in the piston housing. The decompression valve includes a valve housing seated in the piston housing and a valve member moveably received by the valve housing. The valve member has a radially outer surface including an annular shoulder. In addition, the piston includes an end cap secured to the first end of the piston housing. A radially inner surface of the end cap includes an annular valve seat. The decompression valve has a closed position with the annular shoulder of the valve member engaging the valve seat of the end cap and an open position with the annular shoulder of the valve member axially spaced from the valve seat of the end cap. The piston also includes a biasing member configured to bias the decompression valve to the closed position.
No. of claims: 20     No. of figures: 11


Note: Any interested individual may, within 3 months of publication of the grant, file objection thereof with the Grievance Committee after payment of grievance fees.