Petol HYDRA-TORK U4174 User manual

PETOL™ HYDRA-TORK™
U4174
Operating Manual
© 2022 by PETOL GEARENCH. All rights reserved
Form U4174 revision 03/18/2022

2
Table of Contents
PETOL™ U4174 HYDRA-TORKTM Description ............................................................... 3
Torque Rating ......................................................................................................................... 3
PETOLTM GEARENCH Limited Warranty........................................................................ 4
Safe Practices and Procedures............................................................................................... 6
Responsibility ........................................................................................................................ 6
Replacement Parts ................................................................................................................. 6
Safety ..................................................................................................................................... 6
Safe Practices......................................................................................................................... 7
Safety Precautions ................................................................................................................. 8
Responsibility of Distributors................................................................................................ 8
Tong Chain Inspection ........................................................................................................... 9
Overloading / Shock Loads / Side Loading........................................................................... 9
Environmental Conditions..................................................................................................... 9
Normal Life Expectancy...................................................................................................... 10
Lubrication........................................................................................................................... 10
Periodic Inspection List for PETOLTM Special Chain......................................................... 11
Installation............................................................................................................................. 12
Location ............................................................................................................................... 12
Dimensions .......................................................................................................................... 12
Setup .................................................................................................................................... 12
Operation ............................................................................................................................... 13
Controls ............................................................................................................................... 13
Torque – Pressure Conversion Formulas............................................................................. 13
Chain Selection.................................................................................................................... 14
Chain Identification Guide .................................................................................................. 15
Tong Adjustment ................................................................................................................. 16
Loading................................................................................................................................ 16
Breaking Out........................................................................................................................ 17
Making Up........................................................................................................................... 17
Parts List................................................................................................................................ 18
Final Assembly .................................................................................................................... 19
Base Assembly .................................................................................................................... 20
Cylinder Assembly .............................................................................................................. 21
Backup Assembly ................................................................................................................ 22
Vee Saddle Assembly.......................................................................................................... 23
Tong Assembly.................................................................................................................... 24
PETOL™ Special Chain Parts List ..................................................................................... 25
Wear Limits........................................................................................................................... 26

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PETOL™ U4174 HYDRA-TORKTM Description
The U4174 PETOL™ HYDRA-TORKTM unit was designed for making up and breaking out
downhole tools. It is rated for operation on 3” to 8-1/4” diameters with a maximum working
load of up to 17,500 ft-lbs depending upon diameter. See the table at the bottom of the page
for specific torque ratings. The unit may be operated in any position (horizontal or inclined)
and is totally portable.
The PETOL Drill Pipe Tongs are adjusted to the different diameters within their range by
adjusting the chain screw nut for fine adjustment and by adding or removing sections of chain
for the coarse adjustment.
The U4174 also offers the following features:
The tong cylinder and backup tong are mounted on independent tracks for adjusting and
switching from make up to break out.
Two adjustable vee-saddles mounted on the hydra-tork base for support. The vee-saddles
are also mounted on tracks for easy adjustment.
The unit can be operated with any commercially available hydraulic power unit capable of
delivering 3000 psi pressure.
Torque Rating
The following working load limits should always be observed. Exceeding these limits
could result in breaking the tong chain resulting in damage to equipment and possible
injury to personnel.
Diameter
Max. Torque
3” – 4-5/8”
16,900 ft-lbs
4-3/4” – 5-7/8”
17,100 ft-lbs
6” – 6-7/8”
17,300 ft-lbs
7” – 8-1/4”
17,500 ft-lbs

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PETOLTM GEARENCH Limited Warranty
What Is Covered
PETOL™ GEARENCH tools are expressly warranted to you, the purchaser, to be free of defects in material and
workmanship.
How Long Coverage Lasts
This express warranty lasts for the lifetime of the PETOL GEARENCH tool. Warranty coverage ends when the
tool becomes unusable for reasons other than defects in workmanship or material.
How Can You Get Warranty Service
To obtain the benefit of this warranty, contact a PETOL GEARENCH sales representative in Clifton, Texas.
PETOL GEARENCH · 4450 S. Highway 6 · P.O. Box 192 · Clifton, TX 76634
What Will We Do To Correct Problems
Warranted products will be repaired or replaced, at PETOL GEARENCH’s option, and returned at no charge to
you, the original purchaser; or, if after three attempts at repair or replacement during the warranty period, the
product defect in material or workmanship persists, you can elect to receive a full refund of your original purchase
price for the product.
What Is Not Covered
Defects, failures or conditions that are due to normal wear and tear, abuse or misuse, are not covered by this
limited warranty. In addition, this limited warranty is in lieu of all other warranties, express or implied, verbal or
written. To the maximum extent allowed by law PETOL GEARENCH disclaims all implied warranties, including
implied warranties of merchantability and/or fitness for a particular purpose. PETOL GEARENCH also
specifically denies any liability for any incidental damages and/or consequential damages, including but not
limited to property damage to property other than the product itself, loss of sales profits, down time, costs or any
other damages measurable in money, whether or not included in the foregoing enumeration.
Please be advised that some states do not allow the exclusion or limitation of incidental or consequential damages,
so this limitation or exclusion may not apply to you. This warranty gives you specific rights, and you may also
have other rights, which vary from state to state, province to province, or country to country.
Are Personal Injuries Covered
In the event you, someone working for you, or any other person sustain a personal injury as a result of using the
PETOL GEARENCH tool, PETOL GEARENCH limits its potential liability for such a claim or injury to the
fullest extent allowed by law, and disclaims and denies any liability for such personal injury.
Please be advised that some states do not allow the exclusion or limitation of liability for personal injuries, so the
above limitation or exclusion may not apply to you, or the individual claiming injury.
No Other Express Warranty Applies
This PETOL GEARENCH LIMITED WARRANTY is the sole and exclusive warranty, express or implied for
PETOL GEARENCH products. No employee, agent, dealer or other person is authorized to alter, modify, expand
or reduce the terms of this warranty or to make any other warranty on behalf of PETOL GEARENCH.
Law Applicable
All matters related to the sale and/or use of the PETOL GEARENCH tool that is the subject of this limited
warranty, along with the construction and enforcement of the terms of this limited warranty itself, shall be subject
to the substantive and procedural laws of the state of Texas, not the conflicts of laws provisions of Texas, but
rather the laws of Texas themselves.

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Forum Selection Clause
Any dispute arising out of the sale and/or use of the PETOL GEARENCH tool that is the subject of this limited
warranty shall be presented in the form of a claim or lawsuit to the offices of PETOL GEARENCH in Clifton,
Bosque County, Texas. No claim or suit may be brought against PETOL GEARENCH, arising out of the sale
and/or use of the tool, or arising out of the terms of this warranty, except in such forum. Purchase and/or use of
the PETOL GEARENCH tool makes you subject to the benefits and limitations of this limited warranty.
Accordingly, any writ, judgment or other enforcement, obtained from a jurisdiction, county, parish, state or
federal court or other country, other than from the forum identified above, shall be void and unenforceable against
PETOL GEARENCH.
Arbitration Clause
In the event of dispute or claim arises out of the sale and/or use of the PETOL GEARENCH tool that is the subject
of this limited warranty, or arises out of the interpretation or enforcement of the terms and conditions of this
limited warranty, such dispute shall be submitted to binding arbitration pursuant to the rules of the American
Arbitration Association. If required to accomplish the purpose of this Arbitration clause, the purchaser hereby
expressly waives any right to demand trial by jury.
Complete Agreement
This express limited warranty contains the entire agreement regarding express or implied warranties related to the
PETOL GEARENCH tool that is the subject of it. No writing or language contained in the purchase order or any
other document of the purchaser, or invoice of PETOL GEARENCH or any intermediate seller, shall be construed
as modifying, in any way, the rights and liabilities contained in this limited warranty. PETOL GEARENCH
expressly disclaims any obligations expressed in any customer purchase order or document that are contrary to
the terms and limitations of this warranty.
Severability
If any term or limitation contained in this limited warranty is deemed unenforceable by law, then the term shall
be severed from the remaining portions of the limited warranty which shall remain enforceable.
All communications to PETOL GEARENCH regarding the use of the tool and any aspect of the sale of the tool
of this limited warranty should be addressed to PETOL GEARENCH.
PETOL GEARENCH · 4450 S. Highway 6 · P.O. Box 192 · Clifton, TX 76634

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Safe Practices and Procedures
Responsibility
"It is the responsibility of the employer to train the employee in the proper selection and usage
of tools, chains, etc., and to ensure that they are selected and used in that manner. In many
instances, injury results because it is assumed that anybody knows how to use common hand
tools. Observations and the record show that this is not the case. A part of every job instruction
program should therefore be detailed training in the proper use of hand tools (and of all other
special tools and equipment needed to accomplish the job)." - (Source: National Safety
Council)
"Employers are responsible for the safe condition of tools and equipment used by employees,
including tools and equipment which may be furnished by employees." - (Source: OSHA
1910.242A)
Replacement Parts
Use only PETOL™ replacement parts - no other parts are of comparable strength, quality and
interchangeability.
Safety
While we pride ourselves on the quality and dependability that we build into PETOL™
GEARENCH tools and products, we caution users that it is only prudent to know and follow
the simple rules of safety when using our products, or anyone else's.
Always follow safe practices and procedures in accordance with the recommendations of
OSHA, The National Safety Council (NSC), The Hand Tools Institute (HTI), The International
Association of Drilling Contractors (IADC), Etc. All applicable Governmental rules,
regulations or restrictions, now in effect or which may be promulgated, take precedence over
the suggestions in this publication. The information in this publication is designed to
supplement standard safe practices and procedures, not in lieu of, or replacement thereof.

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Safe Practices
(Source: The National Safety Council)
Failure to observe one or more of the following five safe practices accounts for most hand and
powered tool accidents:
1. ALWAYS WEAR SAFETY GOGGLES TO PROTECT EYES
2. SELECT THE RIGHT TOOL FOR THE JOB
3. KEEP TOOLS IN GOOD CONDITION
4. USE TOOLS CORRECTLY
5. KEEP TOOLS IN A SAFE PLACE
Safety Goggles must always be worn by persons in any area where hand and powered tools are
being used.
Never apply excess leverage to a wrench or tool by means of a "Cheater Bar". Never strike
wrenches and tools with hammers or other objects.
All tools should be kept clean, inspected on a regular basis, and replaced when they show signs
of wear.
Be especially careful not to place yourself in a position that could result in bodily injury in the
event of a failure. See diagram on page 17.
READ SAFE PRACTICES AND PROCEDURES MANUAL, CATALOG INFORMATION
AND PRODUCT LABELING PRIOR TO OPERATION.

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Safety Precautions
1. Always wear safety goggles to protect eyes.
2. Select the right tool for the job.
3. Keep tools in good condition.
4. Use tools correctly.
5. Keep tools in a safe place.
6. Wear protective clothing, gloves and safety shoes as appropriate.
7. Use lengths of assembled chain. Do not build lengths from individual components.
8. Do not attempt to rework damaged chain by replacing only the components obviously
faulty. The entire chain may be compromised and should be discarded.
9. Never electroplate assembled leaf chains or components. Plating will result in failure
from hydrogen embrittlement.
10. Do not weld any chain or component. Welding spatter should never be allowed to
come into contact with chain or components.
11. Leaf chains are manufactured exclusively from heat-treated steels and therefore must
not be annealed. If heating a chain with a cutting torch is absolutely necessary for
removal, the chain must not be reused.
12. Inspect chains frequently and regularly for link plate cracking, pin turning, pin
protrusion and corrosion.
13. Use only PETOL™ replacement parts to ensure proper strength.
Responsibility of Distributors
IT IS THE RESPONSIBILITY OF THE PURCHASERS OF PETOL™GEARENCH
PRODUCTS TO CONVEY THE INFORMATION IN THIS PUBLICATION AND ANY
OTHER INFORMATION RELATING TO THE INDIVIDUAL PRODUCT, THROUGH
THE CHANNELS OF DISTRIBUTION, DOWN TO AND INCLUDING THE
INDIVIDUAL USING THE PRODUCT
NOTE:
In view of the fact that the actual use determines whether safety requirements have been
met, the ultimate responsibility to comply rests with the end user.

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Tong Chain Inspection
The service life of leaf chains can be altered by a variety of adverse operating conditions. The
following information discusses the most important of these conditions for consideration when
operating or scheduling replacement of leaf chain systems.
Overloading / Shock Loads / Side Loading
Do not attempt to “inch loads which are beyond the rated capacity of the tool.
Do not strike the tool with a hammer or other object while force is being exerted in an attempt
to loosen a “frozen” joint.
Side pull can be caused by pulling or pushing on the tong in a direction that is not along a
perpendicular plane, unleveled mounting of the tong or vise, inadequate support of the part
being broken out, and improper seating of the part being broken out in the tong or vise.
Improper seating will occur when the diameter of the part is not consistent within the width of
the tong or vise jaw.
Environmental Conditions
Wrench chains operate in widely varying environments, from wet outdoor conditions to mildly
or highly corrosive industrial atmospheres. They can also be exposed to abrasives such as sand
or grit.
The possible effects include:
Moisture - Corrosion and rust reduce chain strength by causing pitting and cracking.
Temperature - Very cold temperatures reduce chain strength by embrittlement.
Chemical Solutions or Vapors - Corrosive attack of the chain components’ grain structure
and/or the mechanical connections between the chain components (crevice corrosion) may
occur. Cracking often is microscopic. Propagation to complete failure can be eventual or
sudden.
Abrasives - Accelerated wearing and scoring of the articulating chain members (pins and
plates) may occur, with a corresponding reduction in chain strength. Due to inaccessibility
of the bearing surfaces (pin surfaces and plate apertures), wear and scoring are not readily
noticeable.
These conditions, when coupled with normal chain wear and inherent residual stress (normally
in the chain as constructed), can result in environmentally assisted failure. It is impossible to
predict chain life under complex conditions, as the degree of hostility and its effects are
dependent on many variables such as temperature, time of exposure, concentration of corrosive
atmosphere or medium, degree of abrasive wear, etc. Establishing the degree and frequency
of unpredictable dynamic loading is also difficult.

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Normal Life Expectancy
A leaf chain’s normal life expectancy can be expressed as a maximum percent of elongation.
This is generally between 2% and 3% of pitch. As the chain flexes back and forth, the bearing
joints (pins and inside link plates) gradually wear from articulation. As with all steel bearing
surfaces, the precision hardened steel joints of leaf chain require a constant film of oil between
mating parts to prevent wear and to resist corrosion.
Lubrication
One of the most important but often overlooked factors is adequate lubrication. In addition to
reducing internal friction, maintaining a film of oil on all chain surfaces will inhibit rusting
and corrosion, this is important as corrosion of highly stressed, hardened steel chain
components can cause a major reduction in the load capacity of leaf chain and result in link
plate cracking.
Protection from corrosion is important in storage as well as in service. The factory lubricant
applied to PETOLTM Chain is a “Fingerprint Neutralizing Water-Displacing Corrosion
Preventative.” This is an excellent rust and corrosion inhibitor for chains in storage.
Do not attempt to paint chains. Though painting may help inhibit corrosion, it will seal off
critical clearances and restricts oil from reaching the pin surfaces where it is needed for good
joint lubrication. Do not plate chains or chain components. Highly stressed alloy steel
components are subject to hydrogen embrittlement caused by plating. Periodic relubrication
of chains is the most important factor in extending the life of the chains. There is no lubricant
that is ideal for all situations.
A heavy oil lubricant provides excellent protection during prolonged storage, but is messy to
apply, will attract dirt and other contaminants and is messy to use. These contaminants could
lead to premature abrasive wear of the moving components. When operating in dusty
environments, lubricated chains will accumulate a paste like buildup of grime. At periodic
intervals, this buildup should be removed by cleaning and the chain should be immediately
relubricated. Do not use caustic or acid type cleaners; use a stiff brush and a certified safe
petroleum base solvent.
Light oil-based lubricants penetrate into articulated joints easily but can also be washed off or
rubbed off during use. A light oil-based lubricant must have periodic reapplication of the
lubricant to maintain coverage.
Specialty chain lubricants (wax-based) provide excellent lubrication. They have no oily
residue. They are easy to apply. They can be more expensive than other lubricants and are
subject to being washed off or worn off. Wax-based lubricants must have periodic
reapplication of the lubricant to maintain coverage.
The frequency of relubrication is the most important factor. It will depend on frequency of
use, length of storage between uses, exposure to dust and other contaminants, and exposure to
salt water or other corrosion accelerants. The end user should establish a good preventative
maintenance program for relubrication of all chains and articulated components.

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Periodic Inspection List for PETOLTM Special Chain

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Installation
Location
The PETOL™ HYDRA-TORK™ Unit should be located in an area with adequate room to
work the downhole tools. The unit may be located indoors or outdoors upon solid ground or a
finished shop floor. No special foundation is required.
Dimensions
Part Number
Length (in)
U4174
36.00
U4174L
60.00
Setup
Locate the hydraulic power unit in a convenient location and connect the hoses to the hydraulic
cylinder.

13
Operation
Controls
Use a hydraulic pressure gauge on the power unit to indicate the system pressure in psi. The
torque produced by the PETOL™ Drill Pipe Tongs is dependent on the hydraulic pressure and
the diameter. See Torque-Pressure Conversion Formulas below for conversion formulas
equating the hydraulic pressure in psi to the torque output in foot-pounds.
WARNING: Never operate the tong with a pressure higher than required to
perform the make up or break out operation. Operation at excessive pressure
may damage the downhole tool and/or injure personnel.
Torque – Pressure Conversion Formulas
The following formula is used to determine the hydraulic pressure required to produce a
known torque:
P = T / (0.232*D + 6.465)
Where P is the pressure required in psi, T is the desired torque in foot-pounds and, D is the
diameter at the tong with the cylinder attached in inches. To find the torque produced from an
observed hydraulic pressure, use the following formula:
T = P * (0.232*D + 6.465)
Where P is the pressure required in psi, T is the produced torque in foot-pounds and, D is the
diameter at the tong with the cylinder attached in inches.

14
Chain Selection
The following table indicates the chains required for various diameters. The chains are selected
by adding or subtracting sections of chain.
Chain Part Number
Diameter Range
151-45-07D
3 – 3 3/4
151-45-09D
3 3/4 – 4 1/2
151-45-11D
4 1/2 – 5 3/8
151-45-13D
5 3/8 – 6 1/4
151-45-15D
6 1/4 – 7
151-45-17D
7 1/16 – 8 1/4
Warning: Wrong chain selection could result in failure. See chain selection table
above and chain identification guide on the following page.

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Chain Identification Guide

16
Tong Adjustment
Warning! The pipe must NOT contact the flat side of the chain screw as shown above.
Improper contact will cause premature breakage of the chain screw and could cause
injury or death. If the flat side of the chain screw contacts the pipe, the chain MUST be
lengthened by adding 2 pitches of chain.
Add or remove chain sections as needed using the splice bolts in the chains. Push on the top
of the jaw to fully compress the spring inside the jaw. Adjust the chain screw nut so that the
chain is as tight as possible and fit into the lugs in the jaw.
Loading
To load the downhole tool in the unit, adjust the vee-saddles to support the tool. Set the tool
into the unit. Position the tongs for make up or break out as needed and set the tongs onto the
tool. Adjust the tongs as described and latch the tong chains.
CAUTION: The vee-saddles must be used to support the tool while torquing.

17
Breaking Out
Load the tool and adjust the tongs as described above. Fully ratchet the tong by extending the
cylinder. Set the system pressure to a minimum. Retract the cylinder. When the tong stops,
begin increasing the system pressure. Keep increasing the system pressure until the connection
is broken loose or the working load of the tong is reached. Do not exceed the rating of the
tong. Consult with PETOL™ GEARENCH as needed for help with the toughest break
out jobs. After the initial break out, ratchet the tong fully and then alternately extend and
retract the cylinder until the connection is fully loosened.
Making Up
Load the tool and adjust the tong and vise as described above. Make up the connection hand
tight using PETOL™-TITAN™ Chain Tongs. Preset the system pressure to obtain the desired
torque if possible. Retract the cylinder. If the cylinder fully retracts without stalling, cycle the
tong (extend / retract). Continue until the cylinder stalls or until the desired pressure is
obtained.
Warning: Do not stand in line with the tongs or chains during operation.

18
Parts List
The following drawings, diagrams, and parts lists describe all parts which may be needed as
replacement items. Where appropriate, standard industrial and hydraulic components have
been used. Should a standard industrial item need replacing, the item may be purchased
locally. To assist you in obtaining parts, the OEM component manufacturer and model
numbers are shown on the parts list. Of course, all replacement parts will be supplied by
PETOL™ GEARENCH if you prefer to order from us.
All tong, vise, and chain components are manufactured only by PETOL GEARENCH.
DO NOT ATTEMPT TO SUBSTITUTE THESE COMPONENTS. The unit will not
work properly unless these components are matched to the specific application. Consult
our factory as your requirement changes. Any non-PETOL GEARENCH substitutions
of these components void all warranties and subject the user to assumption of liabilities
resulting from subsequent use.

19
Final Assembly
Item
Qty
Part Number
Description
Notes
1
1
UB4174
Base assembly
U4174 only, see page 20
1
1
UB4174L
Base assembly
U4174L only, see page 20
2
1
UC4174
Cylinder assembly
See page 21
3
1
UK4174
Backup assembly
See page 22
4
2
DA4174-L08
Drill pipe tong assembly
See page 24
5
2
UHVSA-4174
Vee saddle assembly
See page 23
6
2
151-45-17D
Chain assembly
See page 25
7 4 HI04D
Diamond point insert
(not shown)
Replace blank inserts for extra grip
on small diameters

20
Base Assembly
Item
Qty
Part Number
Description
Notes
1
2
HXN049
Eye nut
McMaster-Carr 3274T43 (or equal)
2
2
HXS028
Stud
5/8-11UNC x 2-3/4” long
3
2
HXS029
Hex bolt
5/8-11UNC x 1-1/2” long