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Pump-Thru Openhole Whipstock Anchor Modification w/ Internal Bypass

IP.com Disclosure Number: IPCOM000247845D
Publication Date: 2016-Oct-06
Document File: 2 page(s) / 163K

Publishing Venue

The IP.com Prior Art Database

Abstract

To modify the existing pump-thru openhole whipstock anchor's piston to have an internal bypass. Also, to design a ported ball seat to sit in the top of the piston that can be pinned up with bass shear screws and then hydraulically shifted to the internal bypass, allowing cementing operations to be performed after the anchor has been set and test.

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Page 01 of 2

Pump-Thru Openhole Whipstock Anchor Modification w/ Internal Bypass

Abstract: To modify the existing pump-thru openhole whipstock anchor's piston to have an internal bypass. Also, to design a ported ball seat to sit in the top of the piston that can be pinned up with bass shear screws and then hydraulically shifted to the internal bypass, allowing cementing operations to be performed after the anchor has been set and test.

Description: This invention would be modifying the current piston for the pump thru openhole whipstock anchor. The current piston has enough meat to it that we could bore out the ID large enough to create a bypass. Holes would have to be drill near the top of the piston to fit shear screws that would then pin up a ball seat that could hydraulically shifted. (See attached drawing). We would want to make sure the ball seat OD is larger than the ID below the bypass to eliminate the need for any kind of ball seat catch. A setup like this would allow us to flip the current order of operations for cemented whipstocks without any additional equipment (.ie landing collar). With the current openhole whipstock anchor and no accessory equipment, cementing operations have to be performed before the anchor is set. This modification would allow customers to set and test the anchor before beginning cementing operations. Thus reducing the chances of cementing drillpipe in the hole.


Page 02 of 2

Ball Seat Design