Manufacturer of Engineered Offshore Water
Disposal Systems for the separation of Oil,
Water, and Sand.
• PROCESS EQUIPMENT
Sump Pile is the most effective device available today for collection,
treatment and discharge of waste water from offshore platforms.
Over thirty years of operating experience and design improvements have
culminated in the patented Petro-Pile®
design, available exclusively from PETREX.
Petro-Pile® is now operating on offshore platforms in the United States, Russia, India, Indonesia, Africa, China, Thailand, Vietnam and Mexico.
Information contained herein is protected by United States patent and trademark laws and is intended for use exclusively by PETREX, INC.
Function of Petro-Pile®
1. To provide a means of disposal of deck and drip pans drainage due to rainfall and deck wash down.
2. To consolidate platform discharges, produced water and deck drainage, into one location.
3. To contain process water upsets until problem can be eliminated.
4. To provide a conduit, protected from wave action, so that allowable discharges can be placed deep enough to prevent sheens.
30 CFR Part 250 "Oil, Gas and Sulphur Operations in the Outer Continental Shelf"
Subpart C "Pollution Prevention"
Section 250.300 (a) (4)
Curbs, gutters, drip pans, and drains shall be installed in deck areas in a manner necessary to collect all contaminants not authorized for discharge. Oil drainage shall be piped to a properly designed, operated, and maintained sump system which will automatically maintain the oil at a level sufficient to prevent discharge of oil into offshore waters. All gravity drains shall be equipped with a water trap or other means to prevent gas in the sump. SUMP PILES shall not be used as processing devices to treat or skim liquids but may be used to collect treated produced water, treated produced sand, or liquids from drip pans and deck drains and as a final trap for hydrocarbon liquids in the event of equipment upsets. Improperly designed, operated, or maintained sump piles which do not prevent the discharge of oil into offshore waters, shall be replaced or repaired.
EPA Discharge Requirements:
40 CFR Part 435 "Oil and Gas Extraction Point Source Category"
Subpart A "Offshore Subcategory"
Section 435.13 Effluent Limitations (Milligrams/Liters) Oil and Grease
|Maximum for any one day||Average Value for Thirty consecutive days shall not exceed:|
|Deck Drainage||No Discharge of Free Oil||No Discharge of Free Oil|
Penalties for Violations:
$10,000 per day
$10,000 per day and six (6) months in jail if records are tampered with
$25,000 per day and one (1) year in jail if cause is willful or negligent
Operation of Petro-Pile®
The incoming oil wet mixture is introduced into the caisson through the down comer pipe. The oily water flows into the caisson below the oil-water interface, which is set by the adjustable weir pipe.
The oily water then begins its flow downward toward the bottom of the caisson. The oil particles that have a large enough diameter to provide them with a velocity greater than the downward velocity of the mixture, begin to float to the surface. As they rise upward through the water, they contact and bond with smaller diameter oil particles and carry them to the surface. As the oil reaches the surface of the fluid level in the caisson, it spills over into the oil quiet chamber through the weir pipe.
Baffles are provided on opposite sides of the caisson and extend to the center. These plates are sloped toward the bottom of the caisson and provide a means of rolling any sand entering the caisson to help strip it of oil.
The oil chamber is provided with bubbler tubes or level switches and either a submersible pump, diaphragm pump, blow case, or a discharge line with a foot valve. As the oil level increases in the quiet chamber it reaches a preset point where the sensors send a signal to start the pump or blow case operation. The oil is then removed from the chamber until it reaches a preset level that shuts off the pump or blow case operation. If there is a failure of the blow case or pump and the oil level keeps rising in the chamber, another preset level is reached and a high level alarm sounds.
Samples of the water leaving the caisson are taken through a stainless steel sampling tube whose inlet is located near the bottom of the caisson.
Advantages of Petro-Pile®
This pile is used as the "end of the system" unit to reduce the parts per million of oil in the sand and water collected on the platform before its final discharge overboard, and as a containment vessel for upsets in the produced water system. Its major advantage is that it provides a large volume, and therefore a long settling time without taking up any deck space. Due to its large volume and retention time the Petro-Pile® is able to handle large rainfall surges that can completely overwhelm conventional sump tanks.
The principle, and patented, main feature of the Petro-Pile® is the quiet oil spillover chamber. This feature provides an oil collection area that is unaffected by wave action, tidal change or storm surge. It also allows for a precise setting of the oil-water interface.
All major pipe and equipment is in close proximity to the top of the pile for ease of maintenance and replacement. Couplings and unions are provided so that no length greater than twenty feet has to be removed.
The flanged top allows for easy access into the caisson. If the caisson should somehow become clogged, the top can be removed and the trash can be scooped out.
Contact PETREX for a more detailed description of our patented features and the numerous advantages of the Petro-Pile® .
History and Clients
This disposal caisson has been installed on platforms in the Gulf of Mexico since the 1970's. It has governmental approval, in its general configuration, as an engineered disposal caisson meeting the requirements of the applicable MMS and EPA Federal Regulations.
A list of companies using Petro-Pile® on their offshore platforms in the United States, Russia, India, Indonesia, Africa, China, Thailand, Vietnam, Angola and Mexico is as follows:
|AGIP||DOMION EXPLORATION||PHILLIPS PETROLEUM|
|AIOC (Russia)||ELPASO ENERGY||POGO|
|AMERADO HESS CORPORATION||ENTIRE ENERGY||SHELL OIL COMPANY|
|AMOCO||EXXON OIL COMPANY||SOUTHERN NATURAL GAS (SONAT)|
|ANADARKO||FREEPORT McMORAN OIL & GAS||SUPERIOR OIL COMPANY|
|ATLANTIC RICHFIELD (ARCO)||KERR McGEE||TATHAM OFFSHORE|
|BRITISH PETROLEUM||LEVIATHAN OIL & GAS||TEXACO, INC.|
|CENTURY OFFSHORE||MOBIL OIL CORPORATION||TOTAL FINA ELF|
|CHEVRON OIL COMPANY||MURPHY EXPLORATION||UNION TEXAS PETROLEUM|
|CONOCO, INC.||ONGC (India)||UNOCAL|
Other Petro-Pile® Products
Fully self contained with Pump, Panel, Level controls, Valving, Piping, Gauge Glasses, Drains, Drip Pan, Vents, Structural Skid, Pad eyes and removable Hatch Covers
Utilizes an innovative flow path to insure
maximum retention time.
New Orleans, Louisiana
Phone: (504)341-2700 Fax: (504)341-2727
Phone: (281)361-8041 or Fax: (281)361-7941
SME CODE PRESSURE VESSELS
PROPRIETARY PROCESS UNITS - (Photo)
OIL AND GAS SEPARATORS - (Photo)
OIL AND GAS PRODUCTION MODULES - (Photo)
GAS DEHYDRATION UNITS - (Photo)
GLYCOL REGENERATION UNITS - (Photo)
CRUDE DESALTERS AND DEHYDRATORS - (Photo)
CHEMICAL INJECTION UNITS - (Photo)
WATER FILTRATION UNITS - (Photo)
MEMBRANE SEPARATION SYSTEMS
PIPING MANIFOLD SYSTEMS
FUEL GAS CONDITIONING UNITS - (Photo)
PROCESS HEATERS - (Photo)
PRODUCED WATER SKIMMERS
HYDROCYCLONE SEPARATION SYSTEMS - (Photo)
GAS & LIQUID MEASUREMENT SKIDS - (Photo)
CITY GATE UNITS
VAPOR RECOVERY SYSTEMS
GAS COMPRESSION MODULES
FLARE SCRUBBER UNITS - (Photo)
SWITCHGEAR AND CONTROL BUILDINGS
PROCESS PUMP SKIDS
STORAGE TANK UNITS - (Photo)
CORRUGATED STORAGE TANKS - (Photo)
PIPELINE PIG LAUNCHERS - (Photo)
SUMP SYSTEMS - (Photo)
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