WBT–620 Bulk Transport Trailer
The Wilco designed and manufactured WBT–620 has two 310 cu. ft. pneumatic
vessels and utilizes a diesel powered air compressor to provide air to the twin
tanks as well as pneumatic loading and unloading of materials.

WBT-620 Arctic Bulk Transport Trailer
The WBT-620 Arctic Service series is designed to transport 620-cf (17.546-m³) of bulk materials, such as blended cement and hydraulic fracturing sand. The WBT-620 Arctic Service trailer is also used to transport bulk materials from one location to another or to discharge directly to pumping units on locations. All equipment on the trailers designed to meet -50 º F specifications.

WST–1600 Bulk Storage Trailer
The Wilco designed and manufactured WST–1600 has four 422 cu. ft. ASME pressure vessels and offers numerous options such as a diesel powered air compressor and hydraulic powered landing gear.

Test Results for Wilco’s WBT-620 Transport Trailer
Tested January 14, 2002 at Marlow, Oklahoma by Wilco personnel.

The trailer was loaded through the rear tank man-way with 10,000 pounds of construction cement. During each test, the tanks were discharged through the trailer discharge manifold into a 4.5 inch I.D. rubber hose 35.5 feet long. The hose was connected to the trailer fill manifold to allow filling of the other trailer tank. After filling the rear tank through the man-way, the rear tank was aerated and the pressure rose to 30-32 PSI. The tank was then vented to zero pressure. The tank was aerated three times before discharging. The time it took to pressure the tank was approximately 2 minutes. All tests were supplied with air from the trailer mounted Gardner-Denver APOGAA compressor.

Three cement transfers were completed with discharge rates of 3077 pounds/minute (32.7 sacks/minute), 3077 pounds /minute (32.7 sacks/minute) and 2667 pounds/minute (28.4 sacks/minute). The last rate was with the bottom row of aeration elements disconnected from the air supply.

After these tests, the material remaining in the tanks was examined. Cement powder formed a bowl in the bottom of the tanks approximately 3.5 inches deep at the outer diameter. The blind flange was removed from the bottom of each tank and the cement powder was swept from the cone and interior piping. The collected cement from the rear tank was 85 pounds. The cement from the front tank was 65 pounds.

Conclusion:
These tests confirm the Wilco WBT-620 CF Transport, when properly maintained, will discharge through short conveying lines at acceptable rates for typical oil field cementing operations. Typical discharge rates in excess of 30 sacks/minute (2820 pounds/minute) can be expected with cement. Discharge through longer lines is possible at reduced rates. Material remaining in the tank after discharge is minimal.

Key Benefits
• Tanks are lower to the ground providing a clearance advantage
• Trailer has a lower center of gravity
• Meets or exceeds state and federal bridge weight laws
• Several options are available upon request

The WBT-620 consists of two (2) 310-cf (8.78-m³) ASME certified and National Board registered pressure vessels. The vessels have a 36-psi (248-kPa) working pressure at -50° to 190° F (-46° to 88° C) temperature range. The trailers equipped with two prime movers, a blower and a compressor. The blower package consists of a Caterpillar DS-40 generator set with an 80.5-hp (60.05 kW), Caterpillar Tier III C4.4 engine and a 3 phase-480 volt- 60 Hz generator. The Drum E490 blower is rated for 220 cfm (374 m3/hr) at 25 psig (172 kPa). The blower is powered by a 30-hp (13.62 kW) 1200 rpm electric motor. The independently mounted Compressor package consists of an 80.5-hp (60.05-kW) Tier III C4.4 Caterpillar engine and an APOG Gardner Denver Compressor with an auto-shut down system. The auto shut down detects high water temperatures, rpm overspeed and low oil pressure. The compressor unit produces 272-cfm (462.4-m³/hr) @ 1072-rpm. The blower and compressor units are housed in 6-in thick, insulated enclosures. The engines are equipped with coolant heaters to pre-heat the engines, fuel and batteries. The transport trailer frame consists of a 102-in wide frame (8-ft, 6-in) (2.59-m) with an air suspension rated at 50, 000-lb (22,700-kg), two (2) 25,000-lb (11,350-kg) axles, eight (8) 11R22.5 tires, and unimount wheels. The trailer is equipped with an anti-lock brake system (ABS).

The Trailer length is 469.5-in (39-ft 1.5-in) (11.62 m) with a maximum height of 152-in (12 ft 8-in) (3.86 m). The width of the trailer and its lower height gives the trailer a low center of gravity. The extra length between tanks is designed to meet the requirements of state and federal bridge formula laws. The assorted manifolds consist of 4-in (10.16-cm) schedule 40 fill and vent pipe and 5-in (12.7-cm) schedule 40 discharge pipe. Hammer unions and butterfly valves are used throughout the manifold assembly. The trailer is delivered with all hoses, brackets, mounts and assemblies (complete functional unit per the specifications and requirements).

One of energy service industry’s units of choice is the Wilco designed and manufactured WST–1600. The WST-1600 Storage Trailer consists of four 422 Cubic Foot (11.32 m3) ASME Code pressure vessels and an available diesel powered air compressor and hydraulic powered landing gear, as well as numerous other options to specifically fit customer requirements.

The storage trailer can also be used to store bulk materials at drilling locations and can be used to discharge directly to cement pumping units on the well site. With the large tank volume and single axle suspension, the WST-1600 Storage Trailer is not suitable for transporting bulk materials.

This trailer is supported while stationary by a large skid base resting on the ground. A tractor equipped with a winch and tail roller is needed to lift the empty trailer into the transport position unless the optional hydraulic landing gear is installed.

The WST-1600 Storage Trailer is available with or without a diesel powered air compressor for self unloading of the bulk materials and with or without hydraulic powered landing gear to raise the WST-1600 into position for coupling with a tractor truck.

The storage trailer frame consists of a 102 inch wide frame (8 feet 6 inches) (2.59 m) with an air suspension rated at 25,000 pounds (11,338 Kg). The storage trailer length is 564.0 inches (47 feet 0 inches) (14.33 m) with a height of 155 inches (12 feet 11 inches) (3.94 m).

WBT-1000 Bulk Transport Trailer
Domestic & International Models
The WBT 1000 series is designed to transport 1000-cf (28.317-m³) of bulk materials, such as blended cement and hydraulic fracturing sand. The WBT-1000 trailers can be used to transport bulk materials from one location to another or to discharge directly to pumping units on locations.

The WBT 1000 is available as a Domestic or International model. Both models are available with or without the compressor package.

The Domestic model is built to comply with Federal bridge weight requirements. It is equipped with two 25,000-lb (11,340 kg) axles and air suspension, four 445/50R22.5 tires on 22.5” x 14” aluminum wheels and ABS brakes. The empty trailer weight with compressor package is 17,745-lb (7913 kg).

The International model is equipped with two 30,000-lb (13,606.8 kg) axles with spring suspension, eight 315/80R22.5 tires on 22.5” x 9” steel wheels and ABS brakes. The empty trailer weight with compressor package is 21238-lb (9633 kg).

The WBT 1000 consists of one 1000-cf (28.317-m³) ASME certified and National Board registered pressure vessel. The vessel has a 35-psi (206.85kPa) working pressure at-20° to 250°F (-29° to 121°C) temperature range.

The independently mounted compressor package consists of a 50-hp (37.3 kW) Tier 4 Perkins engine and an APOG Gardner Denver compressor with an auto shut down system. The auto shut down detects high water temperatures, rpm over speed and low oil pressure. The compressor unit produces 272-cfm (462.4-m³/hr) @ 1072-rpm. The trailer is 102-in wide (8-ft 6-in) (2.59-m), 475.375-in long (39-ft 7 3/8-in) (12.08 m) and 158.75-in tall (13 ft 2-¾-in) (4.03 m).

The manifolds consist of 4-in (10.16-cm) schedule 40 fill and vent pipe and 5-in (12.7-cm) schedule 40 discharge pipe.