CORRECT SIZING

WHAT DO I WANT TO FILTER AND WHAT LENGTH OF FILTER DO I NEED?

Formation Sand:

Use 2’ (.62 m) of filter per each 1’ (.31 m) of unit stroke. The length of the run time you are getting out of your pump, the amount of fluid you are moving and the depth of the well dictate the economics. When the well is over 5000’ deep, we suggest our customers use the 24’ (7.32 m) filter as the pulling expense is the major cost.

Frac Sand:

2’ (.62 m) of filter for each 1’ (.31 m) of unit stroke. No mud/gas anchor and pump above the perforations.

Flour Sand:

If the sand has some grit to it, use 3’ (.90 m) of filter for 1’ (.31 m) of unit stroke. When filtering fine particulates, always use more filter as the velocity of the fluid going through the filter needs to be as low as possible.

Powder Sand, Drilling Mud, or Clay Fines:

Any substance that does not have permeability will pug the filter.

Coal Fines:

Use tubing filters on the bottom of the tubing, and pump above perforations if possible to start with.

Iron Sulfide:

3’ (.90 m) of filter for each 1’ (.31 m) of unit stroke.

Paraffin Well:

If paraffin is in suspension at the pump intake, use the application for your particular abrasive. The tubing must be clean when installing the filter. If the paraffin is solidified at the pump intake, this well is not a filter candidate.

“We do not recommend using a mud anchor in any filter application except the gas separation application.”

MUD/GAS ANCHOR:

We do not recommend using a mud anchor in any filter application except the gas separation application. In this application you should bull plug the end of the mud/gas anchor. If you have to use a mud/gas anchor in any other application we recommend the purge valve designed for mud/gas anchors.

REPLACEMENT ELEMENTS:

All rod run filters have elements that can be replaced when they become plugged.

HOW DO I KNOW WHEN THE FILTER IS PLUGGED?

A. There will be a gradual decrease in the daily fluid production when the filter is starting to plug and the fluid will increase above the pump. There will be a very hard fluid pound.

B. On a well that normally has a high fluid pound, the fluid pound will start lowering. This fluid pound will be much harder.

CAN THE ELEMENTS BE REUSED?

We do not recommend it. When the elements plug, they are plugged and any back pressure used to flush the element may damage it.

ELEMENT CONSTRUCTION:

STANDARD LOW TEMPERATURE STANLEY FILTER

The mandrel is an extruded nylon tube that is slotted with over 30% of the total surface area open.

The filter media is an open celled three-dimensional (3-D) membranes that is rated to 200 degrees F. (79C.) and resistant to most down-hole chemicals.

A woven vinyl-coated fiberglass screen holds filter media in place around the mandrel.

HIGH TEMPERATURE FILTER

Mandrel: Perforated carbon steel tube.

Filter Media: Combination of knitted fiberglass membrane and a knitted woven stainless steel mesh that is rated to 250 F. (107 C.).

A woven stainless steel screen holds the media in place around the mandrel.

STEAMFLOOD FILTER

Mandrel: Perforated carbon steel tube.

Filter Media: Polycrystalline metal oxide fibers (Ceramic) and a knitted woven stainless steel mesh that is rated to 600 F. (301 C.).

A woven stainless steel screen holds the media in place around the mandrel.

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Stanley Filter Company
10061 E. 52nd Street
Tulsa, OK 74146