Reamers and Wipers
Performance tools for all drilling applications
Robust tools for challenging drilling conditions
Enhancement tools for complex drilling
Effective tools for well restoration and enhancement Effective tools to bring the well on line and manage production Industry leading tools for all downhole complications
Make-up and break-out tools for efficient maintenance
Rugged testing equipment to measure tool performance
Utilized to maintain your downhole tools
NOV Downhole is the largest independent downhole tool and equipment provider in the world. We operate over 50 service facilities in 16 countries, delivering solutions, service, and expertise globally.
We design, manufacture, and service the complete bottom hole assembly. In short, we provide end-to-end solutions to meet all of your downhole needs.
With more than 450,000 square feet of manufacturing facilities and a highly skilled and growing workforce, NOV Downhole has the capacity to produce and support the industry’s leading selection of tools; furthermore, we have the ability to work with our customers to design and develop their own proprietary technologies.
We take pride in our reliability and the peace of mind we bring to our customers. Our global reach, vast range of tools, and experienced personnel enable us to support our customers for all downhole applications.
REAMERS AND WIPERS
Conditioning the Wellbore
Wellbores are not always as smooth as they need to be which is critical for tripping in and out of the hole, conducting wireline openhole logging, and running casing.
The NOV Downhole DrillTough Roller Reamers function as a secondary cutting structure to maintain a full gauge hole. This reduces torque and drag, increases the rate of penetration, and overall operational efficiency. Furthermore, a roller reamer stabilizes the bottom hole assembly (BHA) which keeps the drillpipe off the borehole wall. This reduces vibration, drillpipe whirl, and wellbore tortuousity; moreover, the stabilization maintains drilling trajectory whether straight or directional. The NOV Downhole DrillPro Wipers feature a cutting structure that is fixed or rotates with the drillpipe. This cutting structure conditions the wellbore by relieving ledges and keyseats and removes abrupt doglegs while tripping in and out of the hole or while drilling.
Straight Blade Roller Reamer Reduce drillstring torque and drag
Ideal for conditioning the wellbore while drilling
Near Bit Roller Reamer Used as a secondary cutting structure
Ideal for ensuring a full gauge hole
Stabilized Roller Reamer Roller Reamer with increased stabilization
Ideal for conditioning the wellbore in straight/vertical wells
Slant Blade Roller Reamer Cutters rotate with axial movement of the drillstring Ideal for conditioning the wellbore while sliding
Tapered Blade Wiper Undergauged, rough outer diameter blades
Ideal for removing ledges and abrupt doglegs while drilling
Keyseat Wiper
Reamer / clutch combination using drillpipe rotation to wipe Ideal for removing keyseats while tripping in and out of the hole
Roller reamers have a fluted body to allow optimal fluid passage Patented cutter locking system
Roller cutters are quick and easy to change at wellsite Dome and chisel type, tungsten carbide cutters available Oil and mud lubricated roller cutters available
Build a BHA
Consider these additional products from NOV Downhole when making your equipment decisions:
Non-Magnetic Drilling Tools
Stabilizers Drill Collars
Drilling Jars
Driling Jar Intensifiers Drillpipe
Drill Bits Drilling Motors
Slant Blade Roller Reamer
The DrillTough Slant Blade Roller Reamer is engineered to dress the wellbore in a sliding drilling operation. The cutters are diagonal to the axis of the tool enabling them to ream with the movement of the drillstring. The patented cutter geometry permits wellbore conditioning while tripping in and out of the hole. This tool is key to any directional drilling BHA as it removes keyseats, ledges, and doglegs while eliminating wellbore tortuousity and drag.
Available Sizes (OD) Cutters (Points of Contact) in. mm 3 4 6 8 5 7/8 149 6 152 6 1/8 156 6 1/4 159 6 1/2 165 6 3/4 171 7 7/8 200 8 1/2 216 8 3/4 222 9 5/8 245 9 7/8 251 11 279 12 1/4 311 13 3/4 349 16 406 17 1/2 445
Slant Blade Roller Reamers
Features
Cutters are positioned at a 12.5° angle Cutters turn with very little weight on bit Three, four, six, and eight-point cutter configurations
Benefits
Ream while tripping in and out of the hole Ream while sliding
Maintains a full gauge hole BHA stabilization
REAMERS AND WIPERS
Straight Blade Roller Reamer
Placed strategically within the BHA, the DrillTough Straight Blade Roller Reamer conditions the wellbore to reduce drillstring torque and drag, making it ideal for straight hole drilling in difficult conditions.
DrillTough Straight Blade Roller Reamers feature sealed bearing cutters. The sealed bearings provide a low friction, oil lubricated environment between the pin and the cutter. This design prevents drilling fluids from compromising the life of the tool, in turn increasing operational efficiency.
Features
Roller cutters inline with the axis of the tool Three-point or six-point cutter configurations
Benefits
Reams while drilling
Reduces drillstring torque and drag Stiff design maintains drilling trajectory Maintains a full gauge hole
BHA stabilization
Hole Size Series Fishing Neck ID Overall Length Weight
Diameter Length
in. (mm) in. (mm) in. (mm) ft. (m) lbs. (kg)
5 7/8 550 4.75 (121) 26 (660) 1.25 (32) 6.1 (1.9) 400 (200) 6 - 6¾ 508 4.75 (121) 26 (660) 1.38 (35) 6.1 (1.9) 400 (200) 6 - 6¾ (6 pt) 541 4.75 (121) 30 (762) 1.38 (35) 8.8 (2.7) 500 (200) 7 7/8 507 6.25 (159) 38 (965) 2.25 (57) 7.1 (2.2) 700 (300) 8 3/8 549 6.50 (165) 36 (914) 2.25 (57) 6.7 (2.0) 800 (400) 8½ - 8¾ 501 6.75 (171) 36 (914) 2.25 (57) 7.2 (2.2) 800 (400) 8½ - 8¾ (6 pt) 528 6.75 (171) 36 (914) 2.25 (57) 10.5 (3.2) 1,200 (500) 9½ - 9¾ 510 8.00 (203) 36 (914) 2.50 (64) 6.7 (2.0) 1,100 (500) 12¼ 500 9.00 (229) 40 (1,016) 2.75 (70) 8.3 (2.5) 1,700 (800) 13½ 548 9.00 (229) 40 (1,016) 2.81 (71) 7.5 (2.3) 1,700 (800) 14¾ 538 11.00 (279) 38 (965) 3.00 (76) 8.4 (2.6) 2,300 (1,000) 17 502 11.00 (279) 48 (1,219) 3.00 (76) 7.4 (2.3) 3,400 (1,500) 17½ 503 11.00 (279) 48 (1,219) 3.00 (76) 10.0 (3.0) 3,400 (1,500) 26 543 11.00 (279) 48 (1,219) 3.00 (76) 10.0 (3.0) 7,100 (3,200)
NOV Downhole offers a Near Bit version of the DrillTough Straight Blade Roller Reamer.
Stabilized Roller Reamer
A combination of a straight blade roller reamer and an integral blade stabilizer in one tool, the DrillTough Stabilized Roller Reamer is used to condition the wellbore and reduce drillstring torque and drag in wellbores that have the tendency to deviate.
The Stabilized Roller Reamer is typically run higher up in the BHA and is particularly effective in directional wells. These reamers are ideal for maintaining a full gauge hole while keeping the drillpipe away from the wall.
NOV Downhole offers various stabilizer spiral geometry and hard facing options to maximize the durability of the blades.
Features
Integral blade stabilizer providing 360° wall contact Hard faced with tungsten carbide inserts
Three-point or six-point cutter configurations
Benefits
BHA stabilization Reams while drilling
Stiff design maintains drilling trajectory Maintains a full gauge hole
Hole Size Series Fishing Neck ID Overall Length Weight
Diameter Length
in. (mm) in. (mm) in. (mm) ft. (m) lbs. (kg)
6 1/8 - 6 3/4 542 4.75 (121) 30 (762) 1.38 (35) 7.5 (2.3) 600 (300)
7 7/8 545 6.25 (159) 30 (762) 2.25 (57) 6.5 (2.0) 800 (400)
8 3/8 533 6.38 (162) 30 (762) 2.5 (64) 6.7 (2.0) 800 (400)
8 1/2 - 8 3/4 518 6.75 (171) 30 (762) 2.25 (57) 6.5 (2.0) 1,000 (500)
12 1/4 517 9 (229) 28 (711) 2.81 (71) 6.8 (2.1) 2,000 (900)
REAMERS AND WIPERS
The DrillTough Near Bit Roller Reamer, similar to a Straight Blade Roller Reamer, is compact in design allowing effective placement directly above the bit. Its primary purpose is to function as a secondary cutting structure to the drill bit to ensure a full gauge wellbore in hard and abrasive formations.
This tool is a critical component of the BHA in straight and vertical drilling applications.
Available Sizes (OD) Configuration in. mm (Round Motor Equivalent)
5 7/8 149 3 point 6 152 3 point 6 1/8 156 3 point 6 1/4 159 3 point 6 1/2 165 3 point 6 3/4 171 3 point 8 1/2 216 3 point 8 3/4 222 3 point 9 5/8 245 3 point 9 7/8 251 3 point 12 1/4 311 3 point 16 406 4 point 17 1/2 445 4 point 26 560 4 point
*Undergauge OD available on request.
Near Bit Roller Reamer
Near Bit Roller Reamer
Features
Attaches directly to the drill bit Short in length
Roller cutters are in line with the axis of the tool 3-point or 4-point cutter configurations
Benefits
Compact, short body design Secondary cutting structure
Stabilizes the drill bit in hard formations Stiff design maintains drilling trajectory
Tapered Blade Wiper
Simple, tough, and extremely effective, the DrillPro Tapered Blade Wiper should be considered standard BHA equipment for the removal of ledges and abrupt doglegs created while drilling.
The Tapered Blade Wiper’s conventional design, durable cutting structure, and long sweeping blades makes it effective at removing keyseats encountered while tripping in and out of the hole.
Features
Reamer sleeve does not rotate while drilling Single and double clutch reamer sleeve options Rough tungsten carbide outer diameter
Benefits
Efficient removal of keyseats
Allows for tripping in and out with ease Minimizes damage to the borehole wall
Keyseat Wiper
A keyseat is a slot formed by drillpipe cutting a groove into the borehole wall. This typically occurs in the hump of doglegs, in undetected ledges near washouts, or where sharp directional changes occur. Keyseats are the primary cause of mechanical sticking. When tripping out of the hole and as the drillpipe passes through the slot, larger diameter components become wedged into the keyseat.
The DrillPro Keyseat Wiper removes keyseats in the wellbore. The tool possesses an aggressive cutting structure composed of crushed tungsten carbide which is typically dressed ¼ to ½ inches greater than the maximum outer diameter of the drill collars used in the BHA.
The wiper is composed of a mandrel and a free sliding / rotating sleeve reamer. The reamer sleeve is not engaged until it hits an obstruction and engages with the clutch. Once the sleeve has engaged the clutch, the reamer sleeve rotates with the drillstring to wipe away the keyseat.
REAMERS AND WIPERS
NOV Downhole has the capacity and flexibility to design, produce, and support the industry’s leading selection of reamers and wipers, as well as the expertise to assist our customers to develop their own proprietary technologies.
We understand that our customers must be able to absolutely rely on their supplier to meet their needs wherever they are, and we strive to be the one company that does just that.
Whether it is our commitment to innovation, the quality of our engineering designs, or the availability and performance of our tools and services, being reliable means upholding our commitments every time.
Reliability is core to our organization and our offer. We have high expectations for ourselves, and we will strive to meet your expectations every time.
The Bottom Hole Assembly (BHA) is the lower portion of the drillstring and typically comprises the bit, a motor and power section, stabilizers, shocks and jars, and other specialized drilling tools and equipment. Most drilling tools, although functional in various environments, are best suited for use in specific drilling applications.
NOV Downhole offers different BHAs for all types of drilling programs:
BHAs for straight and performance drilling.
BHAs for drilling directional, horizontal, and extended reach wells.
Tool combinations engineered to achieve high penetration rates in soft formations.
Tough, durable assemblies that require greater weight on bit and torque to drill through hard formations. Simple BHAs for drilling shallow wells on land to complex assemblies for drilling in deep water.
Tool assemblies engineered to withstand harsh downhole environments ranging from high temperature and pressure to high chlorides and corrosive fluids.
For all your drilling needs, NOV Downhole provides reliable tools to maximize drilling time and operational success.
To select the optimum downhole tools for your application, consider the following variables:
For ease of selection, NOV Downhole offers its products in ranges that correlate to the various drilling applications:
Selecting your
Drilling Equipment
ADDITIONAL CONSIDERATIONS
Rate of Penetration Requirements (ROP) Directional Controls Stabilization Requirements Dogleg Severity
TYPE OF DRILLING Straight Directional Performance (Vertical) Horizontal Extended Reach WELL DEPTH
Shallow Wells (up to 3,000ft) Intermediate (5,000ft – 7,500ft) Deep (7,500ft – 12,000ft) Ultra Deep (16,000ft +) Offshore Shelf Offshore Deepwater FORMATION Soft Rock Hard Rock Abrasive Formations Thinly Laminated Formations ENVIRONMENT High Pressure High Temperature Corrosive High Chloride Geothermal
tools for predictable drilling
tools for more challenging drilling enhancement tools for complex drilling
REAMERS AND WIPERS
NOV Downhole
Product Ranges
The NOV Downhole product offering is unique in the oil and gas industry. We are proud to be the only independent tool provider able to supply and service the complete bottom hole assembly, including drill bits, motors, reamers, non-magnetic drilling components, stabilizers, drill collars, jars, intensifiers, and drillpipe. In short, we provide each and every tool required to drill a successful well from start to finish.
Our drilling tools and equipment are designed and manufactured to respond directly to our customers’ primary motivation on the wellsite - efficient drilling to reach the target. With the world’s largest fleet, supported by an extensive infrastructure and a commitment to operational excellence, NOV Downhole matches your need to utilize the best equipment available. NOV Downhole is the one name you need for drilling equipment anywhere in the world.
Some drilling conditions require tougher tools. Your application may require greater weight on bit and/or higher torque to achieve the desired rate of penetration. DrillTough is designed for exactly those conditions.
The DrillTough range is a complete high performance line of tools capable of tackling the harshest of conditions. From drill bit to drillpipe, DrillTough is engineered to make fast work of difficult formations.
DrillPro is engineered to make fast work when drilling in conventional formations and is equally able to drill through hard rock when required. Tried and true, DrillPro is an industry standard and can be relied upon to work in predictable drilling environments. Our DrillPro range comprises the total bottom hole assembly, from drill bit to drillpipe.
Designed to work in conjunction with either the DrillPro and DrillTough ranges, DrillSmart is the range of enhancement tools for today’s complex drilling programs.
Our commitment to innovation and engineering excellence means that we are constantly focused on product designs and technological advancements that meet the demands of our customers in increasingly difficult and costly global drilling environments.
Corporate Headquarters
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