Browse Prior Art Database

Reliable Zero-Leak Check Valves Cartridges for ALS Seal Sections

IP.com Disclosure Number: IPCOM000237681D
Publication Date: 2014-Jul-02
Document File: 2 page(s) / 64K

Publishing Venue

The IP.com Prior Art Database

Abstract

Present valves are leaking, and this leads to Seal Section contamination, which in conjunction with equipment thermal cycles leads to motor contamination and ultimately, to motor failure. The goal was to change valve features that are preventing a reliable operation, both at standard and at extreme operating conditions. The invention focus on the robust design and the location of valve moving parts, to place them in a clean environment to prevent the clogging and locking that results in a non-sealed situation. To prevent obstruction and blockages, tight tolerance sliding pieces are avoided, and a large diameter spring is placed in the clean portion of the cartridge. In addition, larger flow cross-sections guarantee that pressure equalization is achieved at a relative faster pace. The new valves retrofit available cartridge envelope.

This text was extracted from a Microsoft Word document.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 54% of the total text.

Reliable Zero-Leak Check Valves Cartridges for ALS Seal Sections

Present valves are leaking, and this leads to Seal Section contamination, which in conjunction with equipment thermal cycles leads to motor contamination and ultimately, to motor failure. The goal was to change valve features that are preventing a reliable operation, both at standard and at extreme operating conditions. The invention focus on the robust design and the location of valve moving parts, to place them in a clean environment to prevent the clogging and locking that results in a non-sealed situation. To prevent obstruction and blockages, tight tolerance sliding pieces are avoided, and a large diameter spring is placed in the clean portion of the cartridge. In addition, larger flow cross-sections guarantee that pressure equalization is achieved at a relative faster pace. The new valves retrofit available cartridge envelope.

Present valves leak because: • The spring and poppet work flooded in well fluid. Well fluid debris and high viscosity inhibit close-tolerance parts movement, hampering shutting effectiveness. • The seat O-Ring placed on valve body swells and deform at operating conditions, not offering a neat surface for the poppet to seal. The proposed valve sketched in the attachment accomplishes with the following features: • The Spring is located in the clean-oil filled cavity, keeping from the very beginning the moving parts away from direct well debris. • In the long run some bitumen and solids would migrate to the interior of the first cartridge. To prevent them from obstructing the valve movements: • the moving parts don’t have tight clearances, and • the spring is as large as possible for the available room. • To ease the construction, the zero-leak seal is achieved by an O-Ring located on the poppet. The elastomer must be carefully selected to operate at well conditions. • To speed the time necessary for seal pressure equalization, internal valve cross sections are increased, allowing a higher oil flow rate.

One alternative design done on a...