Central Alberta Well Services Corp.

 

 

 

350 Single

The CWC WTD 350 rig is a self-propelled, back-in type unit. It is manufactured with wide flange main beams and an all welded frame. Heavy-duty front and rear bumpers, equipped with heavy-duty tows are welded to the carrier frame. The carrier is fitted with an 18” folding walkway on both the driller's and off-driller's side complete with handrails and toe guards. Stairs with handrails lead from the walkway to ground level on both sides.

The unit's highway lighting package features turn signal lights, clearance lights, headlights, stop/brake lights, back-up alarm, and reflectors. The lights operated by controls in the driver's cab. All wires are routed through cable hangers located in the carrier frame and are shielded to protect them from damage.

Included with the unit is a power cord hanger, a load beam carrier, a drill line spool rack, a saver head pump mount, two (2) tire chain hangers, and a complete set of carrier tire chains (with one(1) front tire steering chain only).

A	Overall Length with Derrick	70.0ft (21.95m)
B	Overall Height	13.0ft (3.99m)
C	Overall Width	9.9ft (3.01m)
D	Effective Front Overhang	10.4ft (3.17m)
E	Derrick Overhang	27.4ft (8.38m)
F	Steer Axle to Front	4.9ft (1.49m)
G	Centre Steer to Front	6.9ft (2.13m)
H	Steer Axle Spacing	50in (1.27m)
I	Inter-Axle Spacing	21.3ft (6.49m)
J	Wheelbase	34.4ft (10.49m)
K	Length of Carrier	44.4ft (13.54m)
L	Drive Axle Spacing	1.4ft (4.429ft)
M	Drive Axle Spacing	4.5ft (1.36m)
N	Rear Axle to End	3.4ft (1.04m)
O	Effective Rear Overhang	29.4ft (9.88m)
P	Rear Overhang	1.8ft (0.56m)
	Steer Axle Weight 12,300lb (5579kg)
	Drive Axle Weight 7,390lb (3352kg)

Driver's Cab

The rig is fitted with an insulated single-person driver's cab. Which is equipped with a steering column, steering wheel, acceleration pedal, brake pedal, turning signal switch, adjustable bucket seat with safety belt, dome light, windows (complete with a roll-up window in the door and a sliding side window on the off driller's side), cab heater and a front 12V electric wiper.

The driver’s control panel consists of the following: 

Gauges:

Speedometer, Tachometer, Transmission Oil Pressure, Transmission Oil, Temperature, Fuel, Air Pressure, Engine Oil Pressure, Engine Water, Temperature, and Voltmeter.

Controls:

Headlight, Dimmer, Dome Light, Fan, Wiper, Washer, Low Air, Air Horn, Engine (Start/On/Stop), Shutdown Override, Diagnostic Request, Emergency Shutdown, Differential Lockup, Park Brake, and Gear Selector (Transmission).

Indicator Lights:

High Beam, Check Transmission, ABS, Check Engine, Shutdown Engine, Low Coolant.

A fire extinguisher, first aid kit and flares are stored in the cab.

Running Gear

The carrier's running gear consists of two (2) front non-drive steering axles with rear wheel tri-drive axles. The suspension is a combination of Reyco Spring Suspension and Hendrickson walking beam suspension. All driveline shafts are Spicer 1710 series.

The front steer axles are Meritor Easy Steer with "Q Plus" braking, rated at 22,800Ib (10,342 kg) per axle. The front axles are equipped with four (4) 445/65R22.5 tires.

The rear drive axles are Meritor single-reduction tri-drive axles with "heavy duty Q Plus" braking rated at 50,000Ib (22,680 kg) per axle. The rear wheels are fitted with twelve (12) 12R22.5 tires.

All axles are equipped with Anti-lock Braking System (ABS) and the rear axles are fitted with Driver Controlled Differential Lock (DCDL).

Leveling Jacks

This rig is equipped with Six (6) jacks for leveling and support during rigging operations. There are two hydraulic jacks behind the rear steering axle, two mechanical jacks (belly jacks) mounted on the centre of the frame and two more hydraulic jacks at the rear bumper.

Working Platform

The adjustable working platform has removable handrails and is mounted to the mast base and hung in the working position with cables and chains from the racking board to allow 9'-6” to 14'-0”(2.9m to 4.3m) of ground clearance. Platform dimensions are 11'-5” x 7'-0” (3.5m x 2.1m) removable handrails. There is a 26"x 26" (0.7m x 0.7m) square opening in the floor with a sliding door and a safety valve mount.

Fuel Tank

This unit is fitted with one 100 Imp.Gallon (379 L), cylindrical aluminum fuel tank. This is mounted on the off driller’s side and is equipped with lines and check valves.

Tool Boxes

The carrier is equipped with two (2) tool boxes. One tool box 36" L x 18" H x 18" W (91.4cm L x 45.7cm H x 45.7cm W) is mounted on the underside of the carrier frame. A steel toolbox 48" L x 36"H x 10"W (1.3m L x 91.4 cm H x 25.4 cm W) is mounted on the carrier deck.

Winch

Two 8000 lb (3630 kg) hydraulic planetary winches complete with two 8" (20.3 cm) sheaves and controls are included with this unit.

Engine

The engine is a Detroit Diesel 60 Series. The six cylinder 14 liter diesel engine has an overhead cam, turbocharger, air to air intercooler, electronic controls and Jake brake.

The engine comes complete with:

Alternator (12V)	Muffler
Rig saver	Spark arrestor
EPA Non-road Emissions Certified	Direct drive fan
Water filter	Air Filter
Power steering pump	Radiator (104°F /40°C)
12 Volt electric starter	Oil Spinner
Air compressor	Fuel pro
Tachometer

Engine Specifications

Rated Power Output: 425 bhp at 2,100 rpm.

A steel engine hood (which covers the radiator, engine and transmission), complete with four aluminum side covers, as well as a circulating block heater are mounted.

Transmission

The Allison Transmission Model HT-750-DR-DB has a drop box and disconnect to rear drive axles. This transmission has five forward gears and one reverse.

Power Take-Off

There is a pneumatically controlled Chelsea 852 Series power take-off mounted to the transmission

Right Angle Gear Box

The Crown Heavy Duty Right Angle Gearbox on the CWC WTD 350 service rig is designed for a double drum drawworks drive arrangement.

The right angle gear train is a spiral bevel gear set with hardened steel gears. The gearbox case is fabricated from high strength heavy steel tubing to minimize distortion. Gears and bearings are lubricated by oil bath arrangement. All shafts are machined from high strength heat-treated steel. Input shaft bearings are double Timken with straight roller bearings at the pinion end. The output shaft is supported on spherical bearings. The gear ratio is 1.04:1

Model CE350DD Drawworks

The WTD-00350 rig features a Crown CE350DD, Double Drum Conventional Style Drawworks with band brakes. The drums are dynamically balanced and the brake rims are finish-ground to round after installation. The Drawworks Main Drum is supplied with 7/8" (22mm) Lebus grooving for wireline spooling.

Hoist bearings and brake mechanisms are lubricated with a centralized Alemite system. Chain lubrication is accomplished with an oil bath system located in fully enclosed chain guards.

The brake flanges are removable. Each flange is heat-treated and has been subjected to a Brinell hardness test to ensure long life.

The brake bands wrap 330-degrees around the drum, are adjustable, and are actuated by a linkage which increases the driller's mechanical advantage as the brake handle moves through its operating arc.

All drum shafts are made from high strength, heat-treated and stress relieved, chrome-moly manganese steel.

Drum shaft bearings are double row, self-aligning roller bearings.

Drawworks Specifications:

Main Drum:

Model:	Crown CE350DD
Size:	14" x37" (35.6cm x 94cm)
Wireline Size:	7/8" (22mm)
Drum Clutch:	Twin Disc PO 224
Brake Size:	38" x 10" (96.5cm x 25.4cm) brake rims c/w brake bands
Drawworks Speeds:	Five forward, one reverse
Input Drive Chain:	1-1 /4" (32mm) pitch, double strand
Inner Drum Drive Chain:	1- 1/2" (38mm) pitch, double strand
Cooling:	Provisions for splash cooling
Auxiliary Brake:	Pneumatic disc assist brake 40”(1.016m) single

Sandline Drum:

Model:	Crown CE350DD
Size:	13" x 42" (33cm x 107cm)
Drum Capacity:	14,000 ft of 9/16" (4270m x 14.3mm)
Wireline Size:	9/16" (14.3mm)
Drum Clutch:	Twin Disc PO 218
Brake Size:	38" x 8" (96.5 cm x 20.3cm) brake rims c/w brake bands
Cooling:	Provisions for splash cooling

Mast

The WTD-00350 Workover Rig is equipped with a 72' (22m) x 140,000Ib (63,500kg) freestanding stiff mast with a fixed base. It is constructed with hollow structural steel framing, and is designed and built in accordance with American Petroleum Institute (API) Standard 4F.

Alignment with the well center is achieved through adjusting the mast till angle by tightening or loosening the screw jacks provided between the mast and mast base.

The mast is equipped with a ladder mounted on the off-driller's side which provides access to the racking board and rod basket. The crown platform and handrails are included with the crown frame assembly and provides safety when servicing crown sheaves. The mast is also equipped with a block cradle and 3/4" (19mm) load lines with turnbuckles. A 3-stage, chrome plated hydraulic cylinder is used for raising the mast.

The crown platform provides safety when servicing crown sheaves. The crown block assembly comes with:

Two (2), 24" (61cm) fleet sheaves	One (1), 24" (61cm) deadline sheave
One (1), 24" (61cm) fastline sheave	One (1), 24" (61cm) sandline sheave

The crown block assembly uses nylon composite sheaves, grooved for a 7/8" (22.2mm) line (the sandline sheave is grooved for 9/16” (14.3mm) wireline.

The sheaves are mounted on tapered roller bearing inserts; thus bearing failure will not damage the sheave. Fittings are provided for individual greasing of bearings.

Mast Specifications:

Hook Load:	140 000Ibs (63 500kg)
Height:	72' (22m)
Line String Up:	4 or 6
Wind Load:	69 mph /60 knots (115 km/hr) as per API 4F 2nd Ed.

Included on the mast are:

• 2-piece load beam with two (2) turnbuckles

• Freestanding outrigger package c/w internal guying

• Two (2) flag poles

• One (1) DBI Sala fall arrest

• Mounting bracket, sheave and cable for tong raising cylinder

• Mounting bracket for swab lubricator and saver head

• BOP transport stump between A-legs 7" (17.8 cm) stump comes with 2-7/8" (73mm) collar

• Swing out style tong carrier

• One (1) 9/16" (14.3mm)escape line

• 165' (50.3m) of 1/2" (12mm) winch line w/ 10' (3m) tail chain and safety hook (x2)

Racking Board

This unit is equipped with an automatic erecting racking board. Canvas wind walls and a rear escape system are included as options.

Capacity: 

• 6,600' of 2-7/8" tubing (2010m of 73mm)

Rod Board

Specifications:

• Capacity for:

o 10 400' of 3/4" rods (3170m of 1.9 mm)

o 8600' of 7/8" rods (2620m of 23mm)

o 7800’of 1" rods (2380m of 26mm)

• All rod fingers spaced for 1", 7/8" or 3/4" rods (26mm, 23mm or 1.9mm)

• Complete with man basket. rod board foot pedal, regulator, lines, rod transfer cylinder, and one (1) 3/8” (1 cm)in rod transfer cable

• Air supply for rod transfer cylinder

Standpipe

The standpipe is a 2" (51 mm) x 3000 psi (20mpa) standpipe, with half unions, and safety cable.

Control Panel

The pneumatically and hydraulically controlled operator's control panel is designed to function in sub-arctic to tropical climates, with temperatures ranging from -40^OF (-40^OC) to 131^OF (+55^OC).The panel consists of the following controls and gauges:

Controls

• Hydraulic pump (on/off) (air)
• Gear selector, transmission (air)
• Emergency Stop (air)
• Engine stop, start (air)
• Fast idle (air)
• Horn (air)
• 2 Winch (up/down) (hyd)
• Slips (in/out) (air)
• Slips air regulator (air)
• Hoist (up/down) (air)
• Assist brake (air)
• Assist brake regulator

Gauges

• Main Air pressure
• Hydraulic pressure
• Slips Air pressure
• Disc assist pressure

Hydraulic System 

The hydraulic system on this rig consists of a 210 gallon (nominal) hydraulic tank, a 50gpm hydraulic gear pump, hydraulic inline filter, filler/breather, all related valves, pressure gauge and hydraulic control valves.

The main section of the hydraulic pump supplies power for all of the carrier operations the hydraulic winch, the power tongs, four leveling jacks, and the mast setup controls. The secondary section of the hydraulic pump supplies the accumulator system.

Also included are: A hydraulic power swivel control with pressure adjustment, hydraulics and controls as well as a 22 gallon two (2) station hydraulic accumulator system including Nitrogen backup and fire rated BOP hoses.

Air System

Air supply for normal rig operation equipment consists of:

• Engine mounted air compressor 28 cfm (0.8m³ /min)
• 60 gal (227 L) air receiver system
• Pneumatic plumbing, (valves, drains, lubricators, de-icers, filters and gauges)
• Single air dryer
• Alcohol injector

Electrical System 

Equipment selection and classification of areas is in accordance with current API Standards and North American Electrical Codes.

A 120/208V, 60 Hz distribution panel is mounted on the rig. This panel includes breakers for mast lighting, utility outlets, engine enclosure lighting, connection to a 30A 4P receptacle and spare breakers.

Included electrical options are as follows:

• Seven (7) 2' fluorescent mast lights
• One (1) 400 Watt metal halide light
• One (1) red incandescent crown light
• Switch for mast lighting with receptacles at rear of carrier
• Two (2) 110 Volt incandescent engine lights

Auxiliary Equipment :
Mobile Pump System
Equipment Transporter
Class II Mobile Doghouse