National Oilwell Varco

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SOLUTIONS
SOLUTIONS Overview
Product Index
- Downhole
  Downhole Solutions
  National Oilwell Varco services the industry with a complete range of traditional and custom downhole tools for drilling, fishing, well intervention, re-entry and well completion applications.Learn More
  Drill Bits
  Downhole Motors
  Drilling Tools
  Fishing Tools
  Intervention and Completion Tools
  Service Equipment
  Directional Tools
  Telemetry Drill Strings
  Borehole Enlargement
  Coring Services
  Advanced Drilling Solutions
  Asset Management - SensiOn
  Drill Bits
  National Oilwell Varco (NOV) offers the world's most reliable and comprehensive...Learn More
  
  IntelliServ Broadband Network
  NOV IntelliServ® is the market leader in high-speed, high-volume, high-definition...Learn More
- Drilling
  Drilling Solutions
  National Oilwell Varco provides comprehensive drilling solutions that include technically advanced, field-proven equipment integrated into systems that increase drilling efficiency...Learn More
  Control and Advisory Systems
  Drill Bits
  Drilling Business Solutions
  Drilling Expendables Databook
  Drilling Fluids
  Drilling Fluid Equipment
  Drilling Pressure Control
  Drilling Tubulars
  Flowline Equipment
  Fluid End Expendables
  Fluid End Modules and Accessories
  Fluid Transfer Systems
  Handling Tools
  Hoisting
  Instrumentation Data Acquisition
  Iron Roughnecks
  Jacking and Skidding
  Mining and Minerals
  Motion Compensation
  Multipurpose Pumps
  Pipe Handling
  Power Systems
  Rigs
  Rotating Equipment
  Specialty Inspection Services
  Structures
  Top Drive Systems
  Waste Management
  NXT Ram BOP
  The next generation of blowout preventersLearn More
  
  ST-120 Iron Roughneck
  The new ST-120 Iron Roughneck from NOV combines compact design with maximized reach and takes it to an unprecedented level. Learn More
- Engineering and Project Management
  Engineering & Project Management Solutions
  National Oilwell Varco places a premium on innovative design and maintains a seamless interface with its clients to maintain its leadership in advanced drilling technology.Learn More
  New Technology Development
  Project Specific Solutions
  Successful Project Execution
  New Technology Development
  NOV's commitment to improving customers' ability to do business is...Learn More
  
  NOV Training
  National Oilwell Varco has developed a first-rate global training department to...Learn More
- Industrial
  Industrial Solutions
  National Oilwell Varco provides a comprehensive range of solutions for the multiple application requirements of today’s industries, including water supply and waste water, food and beverage, pulp and paper, chemical and pharmaceutical, mining and mineral and agriculture.Learn More
  Monoflo Industrial
  Fiber Glass Pipe
  Solids Control
  Power Systems
  Multipurpose Pumps
  Fluid End Expendables
  Nitrogen Equipment
  Industrial Motors
  Wind Towers
  Protective Lining Products
  Water Transmission
  Fiber Glass Pipe
  NOV Fiber Glass Systems is a leading worldwide manufacturer of fiberglass pipe products.Learn More
  
  TR Muncher
  Designed specifically for the efficient maceration of abrasive sludges, the TR Muncher is very effective in capturing... Learn More
- Lifting and Handling
  Lifting and Handling Solutions
  NOV delivers an expansive line of cranes, winches, mooring systems, pipe-lay and cable-lay systems, jacking and skidding equipment, and motion compensation systems.Learn More
  Cranes
  Winches
  AHTS Equipment Packages
  Marine Vessel Equipment
  Pipelay Systems
  Cabelay Systems
  Mooring Systems
  Knuckle Box Boom Cranes
  The Knuckle Box Boom Crane is a pedestal-mounted, slew-bearing crane with...Learn More
  
  Winches
  NOV winches are offered in a variety of markets and applications, including...Learn More
- Production
  Production Solutions
  NOV provides custom fabrication, training, commissioning, and field service to meet customers’ specific pumping requirements worldwide. We offer the broadest range of high quality fluid end expendables...Learn More
  Artificial Lift
  Brake and Winch Cooling Systems
  Drilling Expendables Databook
  Floating Production Solutions
  Flowline Equipment
  Fluid King Pump Expendables
  Industrial Motors
  Liner Retention Systems
  Multipurpose Pumps
  Process Equipment
  Production Pressure Control
  Specialty Products
  Variable Frequency Drive
  Floating Production
  Superior Floating Production SolutionsLearn More
  
  Flowline Equipment
  NOV Mission offers an comprehensive range of ANSON Flowline and Valve Equipment...Learn More
- Supply Chain
  Supply Chain Solutions
  National Oilwell Varco Distribution Services Group is a leader in the provision of MRO materials, spare parts, and supply chain solutions around the world.Learn More
  Artificial Lift
  Integrated Supply
  RigStore
  RigPAC
  Oilfield Supply
  Electrical Products
  ValveAutomation
  Become a Supplier
  Electrical Products
  NOV ElectricalProducts is Distribution Services’ electrical, cable, and lighting product solution.Learn More
  
  Valve Automation
  National Oilwell Varco's Valve Automation Group furnishes valves, valve automation products, and...Learn More
- Tubular and Corrosion Control
  Tubular and Corrosion Control Solutions
  National Oilwell Varco's Tubular and Corrosion Control Solutions include, Fiberglass Systems TM, Grant Prideco®, Quality Tubing , Tuboscope® and XL Systems. Learn More
  Coiled Tubing Products and Service
  Tubular Leak Detection
  Fiber Glass Pipe
  Conductors and Casing
  Drilling Tubulars
  Corrosion Control
  Inspection Services
  Line Pipe Services
  Machining Services
  New Pipe Services
  Sucker Rod Services
  Used Pipe Services
  Surveillance Services
  Drill Pipe Services
  Specialty Inspection Services
  Machining Services
  NOV® Tuboscope® offers machining services in three core areas – tool joint rebuilding, thread repair...Learn More
  
  Drilling Tubulars
  NOV Grant Prideco is the world's largest supplier of drill pipe and drill stem accessories.Learn More
- Well Service and Completion
  Well Service and Completion Solutions
  National Oilwell Varco offers a complete line of well servicing equipment including mobile workover rigs, coiled tubing units, circulating and pumping equipment...Learn More
  Coiled Tubing Equipment
  Coiled Tubing Equipment Services
  Coiled Tubing Instrumentation
  Coiled Tubing Pressure Control
  Coiled Tubing Pumping Support
  Coiled Tubing Products and Service
  Coiled Tubing Software
  Wireline
  Stimulation Equipment
  Frac Sand Handling Equipment
  Nitrogen Equipment
  Cementing
  Completion Fluids
  Mobile Rigs
  Multipurpose Pumps
  Snubbing Equipment
  Flowline Equipment
  Workover
  TCP Products
  All Terrain Vehicles
  Fluid End Expendables
  Stimulation Equipment
  NOV Rolligon is a technology leader in the design and development of custom...Learn More
  
  CT Pressure Control
  Texas Oil Tools (TOT) has established itself as one of the leading specialty manufacturers and...Learn More
INVESTOR RELATIONS
INVESTOR RELATIONS Overview
Product Index
- Corporate Profile
  
  Corporate Profile
  National Oilwell Varco is a worldwide leader in the design, manufacture and sale of equipment and components used in oil and gas drilling and production, the provision of...Learn More
  Online Investor Kit
  You can quickly assemble your own Investor Kit.Learn More
- Corporate Governance
  Highlights
  At National Oilwell Varco, we are committed to and recognize the importance of good corporate governance and high ethical standards.Learn More
  Committee Composition
  Guidelines
  Code of Conduct
  Insider Transactions
  Director and Officer Ownership
  Governance Hotline
- Fundamentals
  Snapshot
  At National Oilwell Varco, we are committed to and recognize the importance of good corporate governance and high ethical standards...Learn More
  Trading Statistics
  Balance Sheet
  Income Statement
  Cash Flow
  Ratios
- Stock Information
  Corporate Profile
  At National Oilwell Varco, we are committed to and recognize the importance of good corporate governance and high ethical standards...Learn More
  Stock Quote
  Stock Chart
  Historical Price Lookup
  Investment Calculator
Related Information
ABOUT NOV
ABOUT NOV Overview
Product Index
- Corporate Overview
  
  Corporate Profile
  Since 1841, National Oilwell Varco (NOV) has been dedicated to ensuring customers receive the highest quality oilfield products and services.Learn More
  Statement of Strategic Intent
  National Oilwell Varco will exceed customers' expectations, improve their economics and be an integral part of their strategies.Learn More
  Shared Values
  The National Oilwell Varco Shared Values and Keys to Success are the basis for establishing a common culture for NOV.Learn More
- Health, Safety & Environmental
  
  HSE Overview
  We are dedicated to providing products that lead the industry with safety and the environment in mind, while operating our business for the benefit and wellbeing of ourLearn More
- NOV Brands
  Brands Overview
  By continuously increasing the breadth and depth of products and services offered, National Oilwell Varco has become the steward of more than 40 industry-leading brand names during the past 140 years.Learn More
  AmClyde
  Ameron
  Baylor
  Bear Pumps
  Best Flow Products
  BlackMax - BlackStar
  Bowen
  Brandt
  Continental Emsco
  CTES
  Fiber Glass Systems
  Gaso
  HSI
  Hydrastab
  IntelliServ
  Quality Tubing
  ReedHycalog
  Rolligon
  Texas Oil Tools
  Wheatley
  Wheatley Gaso
  XL Systems
  All Brands
- NOV Milestones
  Milestones Overview
  From its inception as BLM in 1841, National Oilwell Varco has evolved to become the premier source for diversified products and services for the worldwide oil and gas industry.Learn More
  
  1841Company Brissonneau Brothers was established and later named BLM
  1862John Eaton Company was established, known as Oil Well, as a Supply Store for oilfield equipment
  1913Union Tool Company introduced first rotary table
  1918Cooper introduced the Mobile Cooper Hoists workover rigs
  1927Martin-Loomis builds first commercially successful Weight Indicator
  All Milestones
Related Information
NEWS & MEDIA
NEWS & MEDIA Overview
Product Index
- NOV News
  
  National Oilwell Varco featured on the Discovery Channel
  National Oilwell Varco was featured on the Discovery Channel, reaching +100 million viewers, on April 11, 2012 on “Insights with Terry Bradshaw”.Learn More
  NOV Grant Prideco Technology Named Best Innovation
  The award was earned based on the successful development of the first Sulfide Stress Cracking (SSC) Resistant Friction Weld.Learn More
  National Oilwell Varco Completes Flexible Pipe Acquisition
  National Oilwell Varco, Inc. (NYSE:NOV) announced today that it has signed a definitive agreement to acquire NKT Flexibles I/S ('NKT') for approximately US $670 million or 3,800,000,000 Danish Kroner in cash.Learn More
- NOV Media Gallery
  
  Featured Technology
  National Oilwell Varco designs, manufactures and sells the major mechanical components for both land and offshore drilling rigs as well as complete land drilling and well servicing rigs.Learn More
  
  Recently Added
  Brandt VSM Multi-Sizer
  Mission MSP - Mechanical Seal
  Continuous Circulation Systems
  ST-120 Iron Roughneck
  More Media
- Tradeshows and Events
  
  NOV Tradeshows and Events
  National Oilwell Varco designs, manufactures and sells the major mechanical components for both land and offshore drilling rigs as well as complete land drilling and well servicing rigs.Learn More
  Events
  SPE/ICoTA
  The Woodlands, Texas, USA 27-28 March, 2012
  OTC
  Houston, Texas, USA 30 Apr - 3 May, 2012
  More Events
- Technical Publications
  
  NOV Technical Updates and Publications
  Innovative ideas from the minds of NOV's best and brightest...Learn More
  
  Recently Added
  WDP With Wire Route on the Pipe OD
  Wiring Schemes for Tubulars
  MEMS Telemetry System
  Hybrid Cable
  More Publications
CONTACT US
CONTACT US Overview
Product Index
- Contact NOV
  
  Contact NOV
  National Oilwell Varco is a worldwide leader in the design, manufacture and sale of comprehensive systems and components used in oil and gas drilling and production...Learn More
  General Inquiry
  National Oilwell Varco operates globally and is known for integrity, innovation, and exceeding customer expectations. NOV welcomes your feedback, questions or suggestions as it will help us serve you better.Learn More
- NOV Locations
  
  Facility Locator
  Gain access to National Oilwell Varco's facility directory and find a location nearest you.Learn More
  General Inquiry
  National Oilwell Varco operates globally and is known for integrity, innovation, and exceeding customer expectations. NOV welcomes your feedback, questions or suggestions as it will help us serve you better.Learn More
- After Hours On-Call List
  
  After Hours On-Call List
  National Oilwell Varco designs, manufactures and sells the major mechanical components for both land and offshore drilling rigs as well as complete land drilling and well servicing rigs.Learn More
  General Inquiry
  National Oilwell Varco operates globally and is known for integrity, innovation, and exceeding customer expectations. NOV welcomes your feedback, questions or suggestions as it will help us serve you better.Learn More
- Brands Contacts
  
  Brands Contacts
  By continuously increasing the breadth and depth of products and services offered, National Oilwell Varco has become the steward of more than...Learn More
  General Inquiry
  National Oilwell Varco operates globally and is known for integrity, innovation, and exceeding customer expectations. NOV welcomes your feedback, questions or suggestions as it will help us serve you better.Learn More
- Technology Contacts
  
  Technology Contacts
  National Oilwell Varco designs, manufactures and sells the major mechanical components for both land and offshore drilling rigs as well as complete land drilling and well servicing rigs.Learn More
  General Inquiry
  We are here to help. Let us know what we can do to better serve you.Learn More
Related Information
CAREERS
CAREERS Overview
Product Index
- NOV Careers
  
  Welcome to NOV Careers
  With the oil and gas industry booming all over the world from Houston to Singapore, NOV is growing fast. Do you want to grow with us?Learn More
  North America
  Search for a career with NOV in the US and CanadaLearn More
  UK and Norway
  Search for a career with NOV in the UK and NorwayLearn More
- Next Generation
  
  Welcome to the Next Generation Program
  National Oilwell Varco has created the Next Generation Program to train and develop high-potential university graduates for future leadership positions.Learn More
  Success Stories
  The first year of employment for a Next Generation employee is rotational throughout the numerous divisions of National Oilwell Varco and focuses on providing a well-rounded experience...Learn More
  Campus Events
  National Oilwell Varco recruits at different universities each spring and fall.Learn More
Related Information
TRAINING
TRAINING Overview
Product Index
- NOV Training
  
  First Rate Global Training
  In our persistent efforts to better serve our customers, National Oilwell Varco has developed a first-rate global training department to educate you on a variety of our products.Learn More
  Online Training Portal
  National Oilwell Varco provides training in a variety of locations and venues in order to support our product lines with NOV customers.Learn More
  Mobile Training Facility
  By mobilizing our capabilities, we provide onsite maintenance and operations courses to meet your training requirements for your National Oilwell Varco equipment.Learn More
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You are here: NOV.com > Solutions > Downhole > Drilling Tools > Drilling Jars

Drilling Jars
National Oilwell Varco Downhole manufactures Griffith®, Bowen® and BlackMax drilling jars suited for all drilling operations. Product offerings include Double-Acting Hydraulic/Mechanical jars, Hydraulic/Mechanical jars, and PowerStroke Hydraulic Up/Down jars.

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PowerStroke™ Drilling Jar

Griffith® DOUBLE-ACTING HYDRAULIC-MECHANICAL DRILLING JAR

Griffith® HYDRAULIC/MECHANICAL DRILLING JAR

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	Corporate Overview Brands Investor Relations Training insideNOV: News Careers Featured Technology		Downhole Drilling Engineering & Project Management Industrial Lifting & Handling	Production Supply Chain Tubular & Corrosion Control Well Service & Completion		Contact Us Facility Locator 24 HR On-Call List Investor Relations Careers
About NOV		Technology Solutions			Contact NOV

Your Privacy Rights \| Acceptable Use Policy and Visitor Agreement \| Copyright Notices \| Contact Us \| ©2012 National Oilwell Varco All rights reserved.

SOLUTIONS Overview

Product Index

Downhole Solutions

Drill Bits

IntelliServ Broadband Network

Drilling Solutions

NXT Ram BOP

ST-120 Iron Roughneck

Engineering & Project Management Solutions

New Technology Development

NOV Training

Industrial Solutions

Fiber Glass Pipe

TR Muncher

Lifting and Handling Solutions

Knuckle Box Boom Cranes

Winches

Production Solutions

Floating Production

Flowline Equipment

Supply Chain Solutions

Electrical Products

Valve Automation

Tubular and Corrosion Control Solutions

Machining Services

Drilling Tubulars

Well Service and Completion Solutions

Stimulation Equipment

CT Pressure Control

INVESTOR RELATIONS Overview

Product Index

Corporate Profile

Online Investor Kit

Highlights

Snapshot

Corporate Profile

Related Information

ABOUT NOV Overview

Product Index

Corporate Profile

Statement of Strategic Intent

Shared Values

HSE Overview

Brands Overview

Milestones Overview

Related Information

NEWS & MEDIA Overview

Product Index

National Oilwell Varco featured on the Discovery Channel

NOV Grant Prideco Technology Named Best Innovation

National Oilwell Varco Completes Flexible Pipe Acquisition

Featured Technology

Recently Added

NOV Tradeshows and Events

Events

SPE/ICoTA

OTC

NOV Technical Updates and Publications

Recently Added

CONTACT US Overview

Product Index

Contact NOV

General Inquiry

Facility Locator

General Inquiry

After Hours On-Call List

General Inquiry

Brands Contacts

General Inquiry

Technology Contacts

General Inquiry

Related Information

CAREERS Overview

Product Index

Welcome to NOV Careers

North America

UK and Norway

Welcome to the Next Generation Program

Success Stories

Campus Events