ZP Series Rotary Tables for Oil and Gas Drilling Rigs

Description

Goldenman ZP Series Rotary Tables are mechanical drilling-rig components designed to rotate the drillstring through the kelly and rotary-bushing system while also supporting drillstring or casing loads during tripping and casing-running operations.

The complete series includes:

• ZP175
• ZP205
• ZP275
• ZP375
• ZP375Z
• ZP495

Available table-opening diameters range from 444.5 to 1,257.3 mm, equivalent to 17.5–49.5 inches.

Page-listed maximum static-load ratings range from 1,350 to 9,000 kN, while maximum working torque ranges from 13,729 to 64,400 N·m.

Each model has a maximum listed rotational speed of 300 rpm, with model-specific gear ratios, chain-drive center distances, overall dimensions and installation requirements.

The appropriate model should be selected according to the drilling-rig rating, maximum hook load, drillstring and casing program, required rotary torque, maximum operating speed, master-bushing interface and rig-floor installation dimensions.

Product Short Description

Goldenman API 7K ZP Rotary Tables provide mechanical drillstring rotation and vertical load support for conventional land and offshore drilling rigs.

Six models cover compact workover and drilling units through high-capacity rigs handling large-diameter casing and heavy drillstrings.

Each Rotary Table is supplied according to the selected table opening, static-load rating, working torque, gear ratio, input-drive arrangement, master bushing and rig-floor interface.

Product Highlights

• Manufactured to applicable API Spec 7K requirements
• API 7K Rotary Tables product classification
• Six ZP models from ZP175 to ZP495
• Table openings from 17.5 to 49.5 in
• Maximum static-load ratings from 1,350 to 9,000 kN
• Maximum working torque from 13,729 to 64,400 N·m
• Maximum listed speed of 300 rpm
• Model-specific gear ratios from approximately 3.22 to 4.0883
• Heavy-duty mechanical transmission
• Chain-sprocket input-drive arrangement
• Supports compatible master bushings and rotary bushings
• Suitable for drillstring rotation and casing running
• High-strength load-bearing table body
• Replaceable bearings, gears, sprockets and seals
• Lubrication and inspection access
• Dimensional and functional factory inspection
• Load, torque and rotational testing according to the approved procedure
• Replacement spare-parts packages available

What Is a Drilling Rig Rotary Table?

A Rotary Table is a mechanical drilling-rig component installed in the rig floor.

In a conventional kelly drilling system, the Rotary Table transfers rotational power from the rig drive system to the drillstring through:

1. Input sprocket or drive shaft
2. Internal transmission
3. Main rotary-table gear
4. Master bushing
5. Kelly bushing
6. Square or hexagonal kelly
7. Drillstring

The Rotary Table also provides a central opening through which drilling tools, drill pipe, casing and bottom-hole assembly components pass.

During tripping or casing-running operations, the Rotary Table and its compatible master-bushing or slip-bowl system may support the suspended tubular load.

The Rotary Table is therefore both:

• A rotating drive component; and
• A primary load-supporting component in the rig-floor system.

Main Applications

Goldenman ZP Series Rotary Tables can be configured for:

• Conventional kelly drilling rigs
• Land drilling rigs
• Offshore drilling rigs
• Workover rigs
• Vertical well drilling
• Directional well drilling
• Drillstring rotation
• Drill pipe tripping
• Casing-running operations
• Tubing and workover operations
• Rotary-slip support
• Pneumatic power-slip installations
• Master-bushing and kelly-bushing systems
• Rig refurbishment
• Replacement of existing ZP Rotary Tables
• New drilling-rig packages

The Rotary Table should be selected as part of the complete rig-drive and tubular-handling system.

ZP Series Technical Specifications

Model	Table Opening	Sprocket Center Distance	Maximum Static Load	Maximum Working Torque	Maximum Speed	Gear Ratio	Reference Dimensions	Reference Weight
ZP175	444.5 mm / 17.5 in	1,118 mm / 44 in	1,350 kN / 300,000 lb	13,729 N·m	300 rpm	3.75	1,972 × 1,372 × 566 mm	4,172 kg
ZP205	520.7 mm / 20.5 in	1,353 mm / 53.25 in	3,150 kN / 700,000 lb	22,555 N·m	300 rpm	3.22	2,266 × 1,475 × 704 mm	5,662 kg
ZP275	698.5 mm / 27.5 in	1,353 mm / 53.25 in	4,500 kN / 1,000,000 lb	27,459 N·m	300 rpm	3.67	2,380 × 1,475 × 690 mm	6,122 kg
ZP375	952.5 mm / 37.5 in	1,353 mm / 53.25 in	5,850 kN / 1,300,000 lb	32,362 N·m	300 rpm	3.58	2,468 × 1,920 × 718 mm	7,970 kg
ZP375Z	952.5 mm / 37.5 in	1,353 mm / 53.25 in	7,250 kN / 1,600,000 lb	45,000 N·m	300 rpm	3.62	2,468 × 1,810 × 718 mm	9,540 kg
ZP495	1,257.3 mm / 49.5 in	1,651 mm / 65 in	9,000 kN / 2,000,000 lb	64,400 N·m	300 rpm	4.0883	3,015 × 2,254 × 819 mm	11,260 kg

The values above have been reconstructed from the existing Goldenman product table.

Final dimensions, gear ratios, weights, input-sprocket arrangements and performance ratings must be confirmed through the current Goldenman model drawings and approved technical datasheets.

ZP175 Rotary Table

The ZP175 is the smallest model in the current series.

Its reference specifications include:

• 17.5 in table opening
• 1,350 kN maximum static load
• 13,729 N·m maximum working torque
• 300 rpm maximum speed
• 3.75 gear ratio
• 4,172 kg reference weight

The ZP175 may be considered for:

• Compact drilling rigs
• Workover rigs
• Shallow and medium-depth wells
• Smaller drillstring programs
• Smaller casing diameters
• Installations with limited rig-floor space

Its smaller size does not eliminate the need to verify master-bushing, slip and input-drive compatibility.

ZP205 Rotary Table

The ZP205 increases both the table opening and load capacity.

Its reference specifications include:

• 20.5 in table opening
• 3,150 kN maximum static load
• 22,555 N·m maximum working torque
• 300 rpm maximum speed
• 3.22 gear ratio

It can be selected for:

• Medium drilling rigs
• Workover and drilling applications
• Heavier drillstrings than the ZP175
• Larger master-bushing systems
• Casing programs requiring additional opening clearance

The relatively low 3.22 gear ratio must be considered when matching the table with the rig drive and sprocket system.

ZP275 Rotary Table

The ZP275 is a common medium-to-heavy drilling-rig configuration.

Its reference specifications include:

• 27.5 in table opening
• 4,500 kN maximum static load
• 27,459 N·m maximum working torque
• 300 rpm maximum speed
• 3.67 gear ratio

The ZP275 may be suitable for:

• Medium and deep drilling rigs
• Larger drillstring programs
• Casing-running operations
• Pneumatic-slip installations
• Master bushings requiring a 27.5 in rotary-table interface

The 27.5 in opening does not mean every 27.5 in master bushing fits automatically. Drive type, seating dimensions and load interfaces must be checked.

ZP375 Rotary Table

The ZP375 is a heavy-duty 37.5 in Rotary Table.

Its reference specifications include:

• 37.5 in table opening
• 5,850 kN maximum static load
• 32,362 N·m maximum working torque
• 300 rpm maximum speed
• Page-listed gear ratio of 3.58
• Approximately 7,970 kg reference weight

The ZP375 is suitable for:

• Heavy land drilling rigs
• Deep-well drilling
• Large casing programs
• High hook-load operations
• Large master-bushing systems
• Rig replacement and modernization projects

Because several published ZP375 technical tables use slightly different gear-ratio values, Goldenman should state the ratio shown on its own approved transmission drawing and product nameplate.

ZP375Z Rotary Table

The ZP375Z has the same listed 37.5 in table opening as the ZP375 but provides substantially higher load and torque ratings.

Its reference specifications include:

• 7,250 kN maximum static load
• 45,000 N·m maximum working torque
• 300 rpm maximum speed
• 3.62 gear ratio
• 9,540 kg reference weight

The ZP375Z should not be described as merely another name for the standard ZP375.

Differences may include:

• Main-bearing capacity
• Main-gear design
• Table-body reinforcement
• Input transmission
• Sprocket arrangement
• Load-path dimensions
• Product weight
• Lubrication requirements

The exact structural differences should be shown in a separate model comparison drawing.

ZP495 Rotary Table

The ZP495 is the largest and highest-capacity model in the listed series.

Its reference specifications include:

• 49.5 in table opening
• 9,000 kN maximum static load
• 64,400 N·m maximum working torque
• 300 rpm maximum speed
• 4.0883 gear ratio
• 11,260 kg reference weight

It may be selected for:

• Ultra-heavy drilling rigs
• Deep and ultra-deep wells
• Large-diameter casing strings
• High hook-load operations
• Large rotary-table master bushings
• Heavy-duty offshore or land-rig projects

The ZP495 requires a full review of:

• Rig-floor structure
• Supporting beams
• Drive-system power
• Chain or shaft alignment
• Master-bushing dimensions
• Handling and installation equipment
• Lubrication capacity
• Maintenance access

Maximum Static Load

Maximum static load describes the approved vertical load that the Rotary Table can support under the defined design and operating conditions.

It is not the same as:

• Hook load
• Proof-test load
• Breaking load
• Dynamic impact load
• Maximum drilling torque
• Casing string weight alone

The operating review should include:

• Drillstring weight
• Casing-string weight
• Bottom-hole assembly
• Master bushing
• Slips or spider
• Buoyancy
• Dynamic handling loads
• Overpull
• Stuck-pipe contingency
• Offshore rig motion
• Supporting rig-floor capacity

The complete rig-floor system is limited by its lowest-rated component.

A 9,000 kN Rotary Table does not make a lower-capacity master bushing or rig-floor structure suitable for the same load.

Maximum Working Torque

Maximum working torque is the permitted torque transmitted through the Rotary Table under the approved operating conditions.

It must not be confused with:

• Input motor torque
• Sprocket torque
• Drillstring makeup torque
• Tool joint torque
• Short-duration shock torque
• Locked-rotor torque

The required Rotary Table torque should be determined from:

• Hole size
• Drillstring design
• Formation
• Bit type
• Drilling method
• Maximum expected rotary drag
• Reaming requirements
• Rig-drive capacity
• Safety and overload limits

Repeated operation near or above the maximum working torque can accelerate wear in:

• Main gears
• Pinion
• Bearings
• Sprocket
• Drive chain
• Keys and shafts
• Table body

Maximum Rotational Speed

All six current models have a page-listed maximum rotational speed of 300 rpm.

The correct operating speed may be lower depending on:

• Drillstring size
• Kelly design
• Kelly-bushing rating
• Vibration
• Drillstring balance
• Bearing temperature
• Lubrication
• Drilling program
• Bit limitations
• Rig-drive performance

Maximum speed is an equipment limit, not a recommended continuous drilling speed for every operation.

Gear Ratio and Drive Matching

Gear ratio influences the relationship between input speed and Rotary Table speed.

A higher ratio generally provides:

• Greater output torque multiplication
• Lower output speed for a given input speed

A lower ratio generally provides:

• Higher table speed for a given input speed
• Lower torque multiplication

The complete drive review should include:

• Drawworks or independent rotary drive
• Electric or mechanical prime mover
• Input sprocket teeth
• Chain size and number of rows
• Input-shaft speed
• Center distance
• Required table speed
• Maximum input torque
• Chain adjustment
• Guard arrangement

The input sprocket should not be selected only from the model number.

Distance from Table Axis to Input Sprocket

The current series lists the following reference distances:

• ZP175: 1,118 mm
• ZP205: 1,353 mm
• ZP275: 1,353 mm
• ZP375: 1,353 mm
• ZP375Z: 1,353 mm
• ZP495: 1,651 mm

This dimension is critical for:

• Rig-floor layout
• Drive-chain alignment
• Drive-shaft positioning
• Guard design
• Replacement installation
• Foundation dimensions
• Centerline matching

For replacement projects, the actual distance should be measured from the table axis to the specified sprocket tooth-row centerline.

Master Bushing Compatibility

The Rotary Table normally works with a model-specific master bushing.

The master bushing supports or drives equipment such as:

• Kelly bushing
• Rotary slips
• Drill Collar Slips
• Pneumatic power slips
• Casing slips
• Insert bowls

Compatibility must be checked using:

• Rotary-table opening
• Master-bushing OD
• Drive type
• Pin-drive or square-drive arrangement
• Seating shoulder
• Taper
• Bowl dimensions
• Load capacity
• Handle and lifting arrangement

A master bushing described as “for a 37.5-inch table” is not automatically compatible with every ZP375 or ZP375Z.

Kelly Bushing Compatibility

The kelly bushing transfers Rotary Table rotation to the kelly.

Selection should confirm:

• Square or hexagonal kelly
• Kelly size
• Roller or pin-drive bushing
• Master-bushing interface
• Maximum torque
• Maximum speed
• Roller dimensions
• Drive-pin arrangement
• Vertical movement
• Lubrication requirements

The kelly, kelly bushing, master bushing and Rotary Table form one torque-transmission system.

The allowable torque is limited by the lowest-rated component.

Use with Pneumatic Power Slips

ZP Rotary Tables can be integrated with compatible PS Series Pneumatic Power Slips.

Examples may include:

• PS175 with an approved 17.5 in table system
• PS205 with an approved 20.5 in table system
• PS275 with an approved 27.5 in table system
• PS375 with an approved 37.5 in table system

Compatibility requires more than matching model numbers.

Confirm:

• Master-bushing model
• Slip-bowl geometry
• Taper
• Seating depth
• Power-slip dimensions
• Tubular range
• Rated load
• Pneumatic controls
• Installation clearance

Supporting Drillstring and Casing Loads

During tripping or casing-running operations, the tubular load may be transferred through:

1. Drill pipe, casing or tubing
2. Rotary slips or power slips
3. Slip bowl or master bushing
4. Rotary Table
5. Rig-floor supporting structure

Every interface must be evaluated for:

• Rated capacity
• Contact geometry
• Wear
• Alignment
• Material condition
• Dynamic load
• Operating procedure

A high-capacity Rotary Table cannot compensate for incorrectly sized or worn slips.

Bearings and Main Gear System

The main rotating assembly normally includes:

• Main table body
• Main gear
• Pinion or input gear
• Main bearings
• Thrust-bearing surfaces
• Lubrication passages
• Seals
• Housing
• Inspection covers

The bearing system must support:

• Vertical tubular load
• Rotational load
• Gear force
• Radial load
• Dynamic drilling effects

Bearing condition directly affects:

• Table runout
• Rotational smoothness
• Gear alignment
• Operating temperature
• Noise
• Torque transmission
• Service life

Lubrication Requirements

Proper lubrication is essential for the main gear, pinion, bearings and drive components.

The lubrication program should define:

• Lubricant type
• Viscosity
• Oil or grease quantity
• Fill level
• Inspection interval
• Change interval
• Ambient-temperature range
• Contamination limits
• Drain and sampling points

Poor lubrication can cause:

• Bearing overheating
• Gear pitting
• Tooth wear
• Scuffing
• Seal failure
• Excessive noise
• Increased power consumption
• Premature failure

The selected lubricant must follow the Goldenman operating manual and site temperature conditions.

Installation Requirements

Before installation, confirm:

• Rig-floor opening
• Supporting-beam arrangement
• Rotary Table centerline
• Well center
• Input-drive centerline
• Sprocket center distance
• Foundation bolt pattern
• Supporting contact surfaces
• Available vertical clearance
• Master-bushing interface
• Maintenance access
• Chain-guard clearance
• Lubrication access
• Lifting and handling plan

The table should be installed level and aligned with:

• Well center
• Derrick centerline
• Kelly
• Crown block
• Traveling block
• Drilling hook
• Swivel
• Drive system

Misalignment can cause uneven bearing loads, chain wear, vibration and kelly-bushing problems.

Replacement Rotary Table Matching

A replacement Rotary Table should not be selected from table opening alone.

Provide:

• Existing manufacturer
• Existing model
• Serial number
• Table opening
• Static-load rating
• Working torque
• Maximum speed
• Gear ratio
• Input-sprocket dimensions
• Sprocket center distance
• Chain size
• Foundation dimensions
• Bolt-hole pattern
• Overall dimensions
• Master-bushing model
• Kelly-bushing model
• Rig-floor layout
• Existing drawings
• Installation photographs

Two ZP375 Rotary Tables may have similar performance ratings but different:

• Sprocket arrangements
• Input shafts
• Gear ratios
• Foundation dimensions
• Master-bushing interfaces
• Lubrication systems
• Product weights

Direct interchangeability must be confirmed from drawings.

Common Operating Problems

Rotary Table Overheating

Possible causes include:

• Incorrect lubricant
• Low lubricant level
• Bearing wear
• Gear misalignment
• Excessive load
• Excessive speed
• Contamination
• Tight bearing adjustment

Abnormal Gear Noise

Possible causes include:

• Gear-tooth wear
• Incorrect backlash
• Broken or damaged teeth
• Bearing movement
• Loose fasteners
• Poor lubrication
• Input-drive misalignment

Excessive Vibration

Possible causes include:

• Unbalanced rotating components
• Kelly misalignment
• Worn master bushing
• Damaged bearings
• Loose foundation
• Chain vibration
• Drillstring dynamics

Reduced Output Torque

Possible causes include:

• Drive-chain slippage
• Worn sprocket
• Gear damage
• Input-drive limitations
• Incorrect gear ratio
• Mechanical loss
• Overloaded drilling conditions

Oil Leakage

Possible causes include:

• Worn seals
• Damaged gasket
• Loose inspection cover
• Excessive oil level
• Blocked breather
• Shaft wear
• Housing damage

Inspection and Maintenance

Routine inspection should include:

• Table body
• Main rotating table
• Main gear
• Pinion
• Bearings
• Sprocket
• Drive chain
• Input shaft
• Keys and couplings
• Lubricant level
• Seals and gaskets
• Fasteners
• Master-bushing seating area
• Foundation and support
• Guards
• Product markings

Monitor:

• Bearing temperature
• Gear noise
• Vibration
• Lubricant condition
• Table runout
• Chain tension
• Oil leakage
• Fastener tightness

Critical wear or damage should be evaluated before continued operation.

Recommended Spare Parts

A project-specific spare-parts package can include:

• Main bearings
• Thrust bearings
• Main gear
• Pinion gear
• Input sprocket
• Input shaft
• Shaft seals
• Oil seals
• Gaskets
• Bearing retainers
• Keys
• Fasteners
• Inspection-cover seals
• Lubrication fittings
• Chain components
• Brake or locking components where applicable
• Master-bushing wear components

Spare quantities should reflect:

• Rig operating schedule
• Remoteness of the drilling site
• Local service availability
• Expected operating hours
• Existing equipment condition
• Delivery lead time

Manufacturing and Quality Control

Goldenman manufacturing and inspection procedures can include:

• Raw-material certificate verification
• Heat-number traceability
• Casting and forging inspection
• Mechanical-property testing
• Heat-treatment verification
• Main-body dimensional inspection
• Table-opening inspection
• Gear dimensional inspection
• Gear-tooth profile inspection
• Gear hardness testing
• Bearing-seat inspection
• Input-shaft inspection
• Sprocket inspection
• NDE of critical load-bearing components
• Assembly-clearance inspection
• Gear-backlash inspection
• Bearing-preload or clearance verification
• Lubrication-system inspection
• No-load rotational test
• Speed verification
• Torque test according to the approved procedure
• Static-load test according to the approved procedure
• Leakage inspection
• Noise and vibration inspection
• Product marking verification
• Final documentation review

Factory Acceptance Test

The agreed FAT can include:

• Approved datasheet review
• General arrangement drawing verification
• Material traceability review
• Table-opening inspection
• Sprocket center-distance verification
• Overall dimensional inspection
• Weight verification
• Gear-ratio verification
• No-load rotation test
• Maximum-speed verification
• Forward and reverse function where applicable
• Bearing-temperature monitoring
• Noise and vibration inspection
• Lubrication leakage inspection
• Torque test
• Static-load test
• Post-test inspection
• Master-bushing fit-up test
• Product marking review
• Documentation review

The test procedure and acceptance criteria should be agreed before manufacturing.

Available Documentation

The documentation package can include:

• API 7K certificate according to Goldenman’s licensed scope
• Certificate of Conformity
• Model-specific product datasheet
• General arrangement drawing
• Installation drawing
• Foundation and bolt-pattern drawing
• Input-drive and sprocket drawing
• Master-bushing interface drawing
• Lubrication diagram
• Material certificates
• Heat-treatment records
• Mechanical-property reports
• Gear inspection report
• Hardness report
• NDE reports
• Dimensional inspection report
• Assembly-clearance report
• No-load test report
• Speed-test report
• Torque-test report
• Static-load test report
• Product traceability record
• Operation and maintenance manual
• Recommended spare-parts list
• Packing list
• Third-party inspection report

Frequently Asked Questions

Is this page only for the ZP375 Rotary Table?

No.

It covers the complete Goldenman ZP Series, including ZP175, ZP205, ZP275, ZP375, ZP375Z and ZP495.

What is the difference between ZP375 and ZP375Z?

Both have a 37.5 in table opening, but the ZP375Z has higher page-listed static-load and torque ratings.

ZP375 is listed at 5,850 kN and 32,362 N·m, while ZP375Z is listed at 7,250 kN and 45,000 N·m.

Their weight, gear ratio and overall width also differ.

Does ZP375 mean the table is rated for 375 tons?

No.

The model designation mainly corresponds to the 37.5 in table-opening class.

The current page lists a maximum static load of 5,850 kN, approximately 1.3 million pounds.

Does ZP495 mean a 495-ton load rating?

No.

ZP495 refers to the 49.5 in opening class. The page-listed maximum static load is 9,000 kN, equivalent to approximately two million pounds.

Can one Rotary Table use any master bushing with the same nominal size?

No.

The table opening, drive arrangement, seating shoulder, taper, load rating and master-bushing dimensions must all match.

Can ZP375 directly replace another manufacturer’s 37.5 in Rotary Table?

Not automatically.

The sprocket center distance, gear ratio, chain size, foundation dimensions, input arrangement and master-bushing interface must be compared.

Is 300 rpm the recommended continuous drilling speed?

No.

It is the listed maximum equipment speed. The actual drilling speed depends on the drillstring, kelly, bushing, bit, vibration and drilling program.

What limits the maximum load supported through the Rotary Table?

The allowable load is limited by the lowest-rated component in the load path, including:

• Slips
• Slip bowl
• Master bushing
• Rotary Table
• Rig-floor structure

Can a Rotary Table be used with a top drive?

A top-drive rig may retain a Rotary Table for tubular handling, backup rotation, master-bushing support or specific operations.

The exact function depends on the rig design.

What data are required to order replacement gears or bearings?

Provide the Rotary Table model, serial number, drawing revision, gear part number, tooth count, module or diametral pitch, shaft dimensions and clear photographs.

A worn component should not be the only manufacturing reference.

What is the most important installation dimension?

Several dimensions are critical, particularly:

• Table-opening diameter
• Well-center alignment
• Sprocket center distance
• Foundation bolt pattern
• Input-shaft height
• Master-bushing interface

A complete installation drawing is preferable to one isolated dimension.

Information Required for Quotation

Please provide:

• Required Rotary Table model
• Drilling-rig model
• Maximum hook load
• Maximum static load through the table
• Required working torque
• Required maximum speed
• Drillstring size range
• Casing size range
• Required table-opening diameter
• Existing Rotary Table manufacturer and model
• Input-drive type
• Input speed
• Chain size and number of rows
• Sprocket dimensions
• Sprocket center distance
• Gear-ratio requirement
• Master-bushing manufacturer and model
• Kelly-bushing type and size
• Rotary-slip or power-slip model
• Rig-floor opening
• Foundation dimensions
• Bolt-hole pattern
• Available installation height
• Ambient-temperature range
• Land or offshore application
• API Monogram requirement
• Inspection and test requirements
• Third-party inspection requirement
• Required spare-parts package
• Destination country
• Required delivery schedule

For replacement equipment, also provide the existing nameplate, serial number, general arrangement drawing and installation photographs.

Request a Technical Quotation

Goldenman supplies API 7K ZP Series Rotary Tables for conventional drilling, workover, casing-running and rig-refurbishment projects.

Available models include ZP175, ZP205, ZP275, ZP375, ZP375Z and ZP495, covering table openings from 17.5 to 49.5 inches and maximum static loads from 1,350 to 9,000 kN.

Send your rig model, required opening, static load, torque, speed, drive arrangement and master-bushing information to:

Email: info@goldenman.com

Goldenman will review the rig-floor and transmission interfaces and prepare the recommended Rotary Table model, general arrangement drawing, installation data and commercial quotation.