Product/Service

Pyramid Screens

Source: Derrick Equipment Co, Oilfield Division Office
Derrick Equipment Company has again revolutionized screening technology with the introduction of the patented Pyramid (PMD) and Pyramid Plus (PMD+) screens
Derrick Equipment Company has again revolutionized screening technology with the introduction of the patented Pyramid (PMD) and Pyramid Plus (PMD+) screens. This revolutionary three dimensional screen design offers the benefits of traditional flat screens while adding a significant increase in useable screen area; allowing for a 70% increase in fluid handling capacity.

Benefits of Pyramid Screens

  • Increased Shaker Capacity---Pyramid and Pyramid Plus screens increase the total amount of useable screen area by 50% to 125%.
  • Screen Finer Faster---Utilizing Pyramid or Pyramid Plus screens enables rigs to screen 2 to 3 mesh sizes finer than traditional perforated plate panels. This maximizes solids removal capacities.
  • Makes Fine Separations---Pyramid and Pyramid Plus screens are capable of making separations as fine as 43 microns.
  • Fits Existing Shakers---There is no need to modify or replace existing equipment. Pyramid screens fit all Derrick shakers, thus allowing the most efficient use of existing equipment.
  • Easily Repaired---The Pyramid screen design lends itself to easy field repair with RTV products.
  • Reduction of horseshoe effect---The Pyramid screen design keeps the peak areas clear of solids and allows higher fluid throughput. This prevents the horseshoe effect that is common on crowned bed shakers.
  • Dryer cuttings---Pyramid screens minimize fluid loss by spreading thinner layers of fluid dispersion over an increased screen area, resulting in more effective drying capabilities.

Derrick Pyramid Screens
Pyramid and Pyramid Plus screens provide an easy, cost effective increase in shaker performance. Designed with the latest technology, Pyramid screens allow rigs to screen finer earlier in the drilling process, thus significantly reducing mud and disposal costs.

As with all Derrick screens, Pyramid and Pyramid Plus screens comply with API RP-13E standards for effective screen cloth designation.

Pyramid Design
The Pyramid screen consists of a standard sandwich construction having two fine-mesh cloths layered with a coarse backing cloth. These three layers are bonded together, corrugated, and then bonded to a perforated plate. The resulting corrugations are 0.8 inches high on the PMD screen and 1.5 inches high on the PMD+, increasing total screening area and maximizing fluid dispersion. As with the Derrick PWP screen series, the Pyramid screens are capable of making separations as fine as 43 microns.

How Pyramid Screens Work
The Pyramid screen uses gravity to immediately force the oncoming solids off the peaked areas and down into the trough sections of the panel, not to the outside edges of the discard screen. This preferential solids distribution keeps the peaked areas clear of solids and allows for continuously higher fluid throughput than is possible with any standard flat panel screen.

Derrick Equipment Co, Oilfield Division Office, 15630 Export Plaza Drive, Houston, TX 77032-2517. Tel: 281-590-3003; Fax: 281-442-6948.