Browse Prior Art Database

Grease Pup Excluder Sub for an Inflatable Service Packer

IP.com Disclosure Number: IPCOM000236126D
Publication Date: 2014-Apr-07
Document File: 1 page(s) / 13K

Publishing Venue

The IP.com Prior Art Database

Abstract

The purpose is to create a barrier between working fluid in the workstring and the reservoir fluid in the workstring to fill or activate an Inflatable Service Packer. Currently, we use a 10 ft pup filled with grease, but there is no mechanical means to flow the grease and keep the barrier uniform. Currently, the Inflatable Service Packer uses a 10 ft grease pup above the reservoir workstring to keep the reservoir fluid from becoming contaminated by fluid above the grease plug. The grease plug works as long as the grease is packed consistently in the pup. Currently, there is no mechanical process to separate the working fluid from the grease and the reservoir fluid. By building a grease pup with excluder the success of the inflation rate with the Inflatable Service Packer would be increased. A 10 ft pup joint would be honed to size, the upper piston would be built with seals and an outside diameter to fit the inside diameter of the pup joint, the center of the upper piston would have a burst disc in it. The lower excluder assembly would be a long tube cut on an angle with large holes drilled in it to allow grease, fluid and cement to flow through it during the filling process. When pressure is applied to the workstring above the grease pup the upper position would move down the pup forcing the grease through the holes in the excluder tube, this in turn would force the clean reservoir fluid below into the Inflatable Service Packer element. Once the piston reaches the excluder tube the angled pipe or tube would cut the burst disc in the upper plug and allow it to seat exposing the tube and hole to working fluid. This would happen after the Inflatable Service Packer is inflated and set. The excluder would allow cement to be pumped or other fluid circulated in the well.

This text was extracted from a Microsoft Word document.
This is the abbreviated version, containing approximately 80% of the total text.

Grease Pup Excluder Sub for an Inflatable Service Packer

The purpose is to create a barrier between working fluid in the workstring and the reservoir fluid in the workstring to fill or activate an Inflatable Service Packer.   Currently, we use a 10 ft pup filled with grease, but there is no mechanical means to flow the grease and keep the barrier uniform.

Currently, the Inflatable Service Packer uses a 10 ft grease pup above the reservoir workstring to keep the reservoir fluid from becoming contaminated by fluid above the grease plug.  The grease plug works as long as the grease is packed consistently in the pup.  Currently, there is no mechanical process to separate the working fluid from the grease and the reservoir fluid.   By building a grease pup with excluder the success of the inflation rate with the Inflatable Service Packer would be increased.   A 10 ft pup joint would be honed to size, the upper piston would be built with seals and an outside diameter to fit the inside diameter of the pup joint, the center of the upper piston would have a burst disc in it.  The lower excluder assembly would be a long tube cut on an angle with large holes drilled in it to allow grease, fluid and cement to flow through it during the filling process.  When pressure is applied to the workstring above the grease pup the upper position would move down the pup forcing the grease through the holes in the excluder tube, this in turn would force the clean reservoir fluid below into...