Central Alberta Well Services Corp.

 

 

 

350 Double

Self Propelled Back-In Carrier

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" driller's and off-driller's side folding walkway, complete with handrails and toe guards. Driller's and off-driller's side stair, also fitted with handrails, lead from the walkway to ground level.  

The unit's highway lighting package features turn signal lights, clearance lights, headlights, stop/brake lights, back-up alarm, and reflectors. The lights are fully wired to the controls and the switches are located 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.

Driver's Cab

The rig is fitted a with a single-man insulated driver's cab. This is equipped with a steering column and steering wheel, acceleration and brake pedals, 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 installed 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 Volt.

Controls:

Head Light, Dome Light, Dimmer Control, Fan, Wipers, 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.

Running Gear

The carrier's running gear consists of two (2) front non-drive steering axles with rear 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 20,000 Ib 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 25,000 Ib per axle. The rear wheels are fitted with twelve (12) 12R22.5 tires with a ratio of 4.56 at 58mph.

All axles are equipped with Anti-lock Braking System (ABS). The ABS optimizes braking performance under demanding conditions or emergency braking, and provides maximum control on hazardous, slippery surfaces.

The rear axles are fitted with Driver Controlled Differential Lock (DCDL). 

Leveling Jacks

This unit is equipped with four mechanical locking hydraulic jacks and, two (2) drop-down mechanical belly jacks. These are for leveling and supporting the carrier during rig operations. The jacks are located at the rear bumper and behind the rear steering axle.

Working Platform

Platform dimensions are 11'-5"x 7'. There Is a 26' x 26" square opening in the floor with a sliding door and a safety valve mount. The adjustable folding working platform is mounted to the mast base and hung in the working position with cables and chains from the racking board to allow anywhere from 9'-6" to 14' of ground clearance. The platform is fitted with removable square handrails.

Fuel Tank

This unit is fitted with one 125 gallon, 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 three (3) tool boxes. One tool box (36"L x 18"H x 18" W) is mounted on the underside of the carrier frame. Another steel toolbox (48" L x 36"H x 10" W)is mounted on the carrier deck.

Winch

Two 8,000 Ib hydraulic planetary winches complete with two 8 inch sheaves and controls are included with this unit.

Engine

The engine is a Detroit Diesel Series 60. The six cylinder, 14 liter diesel engine is rated at 425 BHP. Features of this engine include: overhead cam, turbocharger, air to air intercooler, electronic controls and Jake brake. This fully integrated heavy-duty diesel engine with electronic controls has excellent fuel consumption, durability, and low emissions. 

The engine comes complete with:

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

Engine Specifications

Rated Power Output: 425 BHP at 2,100 RPM.

Included options are: an air fan clutch assembly In lieu of a direct drive fan, a Webasto Diesel fired engine pre-heater, a circulating block heater and oil pan heater, an aluminum engine hood which covers the radiator, engine and transmission), four (4) steel side covers, and an engine and transmission drive arrangement mounted on common skid as one unit for ease of removal.

Transmission

The Allison Transmission Model OFS 4700 Series (electronic) straight through transmission, comes complete with drop box and disconnect to the rear drive axles. This transmission is designed for use with diesel engines up to 410 kW (550 BHP). The five forward ranges and one reverse make it best suited for off-highway applications.

The electronically controlled transmission has fully automatic model for driving and manual shift mode for hoisting. The transmission is equipped with converter lock-up feature for maximum efficiency operation.

Power Take-Off

The Chelsea 859 Series power lake-off is transmission mounted and pneumatically controlled.

Right Angle Gear Box

The heavy duty right angle gearbox 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.

Gear Box Specifications:

• Gear Type: Spiral gears
• Gear Ratio: 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 finished-ground to round after installation to ensure even and positive braking. The drawworks main drum is supplied with 1" Lebus grooving to provide 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 subject to a Brinell hardness test thus, ensuring long life.

The 330-degree wrap, fully equalized, adjustable brake bands 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 long life, double row, self-aligning roller bearings.

All components are independently assembled using only parts that have passed demanding quality control and inspection departments.

Drawworks Specifications: 

Main Drum:

Model:	Crown CE350DD
Size:	14" x37"
Wireline Size:	1"
Drum Clutch:	Twin Disc PO 224
Brake Size:	38" x 10" brake rims c/w Brake Bands
Drawworks Speeds:	Five forward, one reverse
Input Drive Chain:	1-1 /4" pitch, double strand
Inner Drum Drive Chain:	1- 1/2" pitch, double strand
Cooling:	Provisions for splash cooling
Auxiliary Brake:	Pneumatic Disc Assist Brake (single, 40 in)

Sandline Drum:

Model:	Crown CE350DD
Size:	13" x 42"
Drum Capacity:	14,000 ft of 9/16"
Wireline Size:	9/16"
Drum Clutch:	Twin Disc PO 218
Brake Size:	38" x 8" brake rims c/w Brake Bands
Cooling:	Provisions for splash cooling

Mast

The WTD-00350 Workover Rig is equipped with a 104' x 205,000 Ib freestanding telescoping mast with a fixed base. It can also be supplied with a guyed configuration. 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. The crown platform and handrails are included with the crown frame assembly and provide safety when servicing crown sheaves. The mast is also equipped with a block cradle and 5/8" load lines with turnbuckles.

A 3-stage, chrome plated hydraulic cylinder is used for raising the mast, and a scoping cylinder raises the top section of the mast. The raising cylinder is equipped with safety chokes to prevent free-fall in the event of a complete loss of hydraulic pressure.

The crown block assembly comes with:

Three (3), 24 in. fleet sheaves	One (1).24 in. deadline sheave
One (1) 24 in. fastline sheave	One (1), 24 in. sand line sheave

The crown block assembly uses nylon composite sheaves, grooved for a 1 inch line (sand line sheave is grooved for 9/16 inch 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 bearing

Mast Specifications:

Hook Load:	205,000 Ibs
Height:	104'
Line String Up:	4 or 6
Wind Load:	69 MPH (60 knots) as per API 4F

Options included with this unit are:

• 2-piece load beam with two (2) turnbuckles
• Two (2) flag poles
• Two (2) DBI Sala fall arrests
• Mounting bracket, sheave and cable for tong raising cylinder
• Folding bracket for secondary fall arrest
• Four (4) 9/16" high tensile crown guylines
• Two (2) 9/16" high tensile racking board guylines
• One (1) 9/16"escape line
• Two (2) 230 ft. winch lines - 1/2" with 10 ft tail chain and safety lock.

Racking Board

This unit is equipped with an automatic erecting racking board, fold down metal wind boards with a 6 foot height and a rear escape system.

Capacity:

• 10,000 ft of 2-7/8" tubing positioned for use with Range II tubulars in doubles

Rod Board

Specifications:

• Capacity for:

o 15,600 ft of 3/4" rods

o 13,600 ft of 7/8" rods

o 11 ,700 ft of 1" rods

• All rod fingers spaced for 1", 7/8" or 3/4" rods

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

• Air supply for rod transfer cylinder

Standpipe

2 in. x 3,000 PSI standpipe, with half unions, and safety cable.

Control Panel

The pneumatic operator's control panel is designed to function in all weather conditions from sub-arctic to tropical climates (-40OC to +55OC).

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

Included control panel options are: sandline depthometer, line weight indicator (hydraulic load cell) with 1" and 7/8" dial plates, and, BOP ram saver which alerts the service rig operator that the BOP pipe rams are dosed and the drawworks main clutch has been engaged.

Hydraulic System

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

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

Fitted options on this unit include: a power swivel control, complete with pressure adjustment, hydraulics and controls.

Air System

Air supply for normal rig operation equipment consists of:

• Engine mounted air compressor (28cfm)
• 60 gal 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.  

Where practical, the lighting wiring is in rigid conduit with flexible terminations in liquid tight flex or rough service cord. RL 80 connectors shall be used for mast lights connections

Any additional fixtures as well as an optional 120/206V, 60 Hz distribution panel are available. The optional distribution panel includes breakers for mast lighting, utility outlets, engine enclosure lighting, connection to a 30A 4P 4W receptacle and spare breakers.

Included electrical options are as follows:

• Nine (9) 2' fluorescent mast lights
• One (1) 400 Watt metal halide light
• One (1) red incandescent crown light
• Switch for mast lighting with four (4) receptacles at rear of carrier
• Two (2) 110 volt incandescent engine lights

• Auxiliary Equipment :
• Mobile Pump
• Carrier Style Transporter
• Class III Crew Mobile