Electromagnetic Telemetry (EMT) Service

The Sperry EMT MWD/LWD system allows data transmission without a continuous fluid column, providing an alternative to negative and positive pulse systems. The system has many applications, including making underbalanced drilling more cost-effective, especially when drilling with air or gasified drilling fluids, in which conventional mud pulse telemetry systems cannot function. However, the Sperry EMT service is not limited to underbalanced drilling. To date, more than 70 percent of downhole runs using the service have been on overbalanced applications where high data density and low survey time are key factors to successful drilling operations.

Electromagnetic Telemetry (EMT) Service

The EMT system establishes a two-way communications link between the surface and the tool downhole. Using low-frequency electromagnetic wave propagation, the EMT system facilitates high-speed data transmission to and from the surface through any formation. Data formats can be readily customized to suit the drilling needs of the particular well.

Electromagnetic Telemetry (EMT) System

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Summary Summary Canada: Accurate Geosteering Helps to Precisely Position a Wellbore in a Cyclic Steam Application for Optimized Oil Recovery Sign in required
Geosteer a horizontal well for precise wellbore placement in the heavy oil reservoir, 2 meters (6.6 feet) above a lower shale boundary.
Summary Summary Canada, Alberta: Real-Time Geosteering Delivers Precise Horizontal Wellbore Placement in Heavy Oil Sands Sign in required
To capture maximum reserves in the Primrose field of northern Alberta, Canada, an operator had resorted to “tagging the shale” bottom to position horizontal wells as close as possible to the base of the reservoir. The result was often a drill bit stuck in the shale, and either poor wellbore placement and lost reserves, or having to pull back and re-drill the section.
Summary Summary Congo: First Use of Electromagnetic Telemetry in Offshore Environment Optimizes Drilling Operations and Saves Time Sign in required
An operator wanted to use an aphron-based mud system to help prevent fluid losses while drilling in a depleted, low-pressure reservoir. Acquiring data using conventional positive or negative mud pulse measurement-while-drilling (MWD) tools would have been difficult or impossible.
Summary Summary USA, Texas: Electromagnetic Telemetry Delivers Reliable Communications and Reduces Operational Time while Drilling on Air Sign in required
Barnett Shale: Drill an interval using an electromagnetic telemetry (EMT) service in a “dry” air drilling environment with an air hammer to reduce operational time.
Summary Summary Colorado, USA: Sperry’s Directional Drilling and Measurement-While-Drilling Services Key in Piceance Basin Tight Gas Development Project Sign in required
Sperry’s excellent drilling performance with minimal failures and reduced operational times has allowed the operator to achieve the best performance results in the Piceance Basin.
Summary Summary Canada: Accurate Geosteering Helps to Precisely Position a Wellbore in a Cyclic Steam Application for Optimized Oil Recovery Sign in required
Geosteer a horizontal well for precise wellbore placement in the heavy oil reservoir, 2 meters (6.6 feet) above a lower shale boundary.
Summary Summary Indonesia: EM Telemetry Service Facilitates Record Performance in Geothermal Drilling Campaign Sign in required
In numerous multi-well projects in Indonesia, several major operators were challenged with minimizing drilling time in geothermal wells where lost circulation and stuck pipe issues were expected.
Summary Summary USA, Devonian Shales, Appalachian Basin: Equitable Resources Reduces Drilling Costs by ~$100,000 Per Well Using Electromagnetic Telemetry Technology Sign in required
Equitable needed to drill multiple underbalanced wells in a field with soft formations imbedded with hard stringers.
Summary Summary Alaska, USA: Pioneer Natural Resources Uses Active Magnetic Ranging to Avoid Risk ofWellbore Collision Sign in required
The Oooguruk project, three miles off the coast of Alaska’s North Slope, is a six-acre island built by Pioneer Natural Resources Co. to enable drilling operations in the Arctic Ocean.
Summary Summary India: EM Telemetry Enables Successful Foam Drilling in Remote Coal Bed Methane Wells Sign in required
In the remote area of West Bengal in eastern India, an operator was experiencing severe mud losses and hole instability problems typical to CBM drilling. They sought to alleviate these problems by drilling with air/foam instead of mud, challenging Sperry Drilling services to provide a solution to the wellbore integrity challenges.
Summary Summary Canada, British Colombia: Mercury™ Electromagnetic Telemetry System Helps Save Time in Delivery of Extended Reach Shale Gas Well Sign in required
An operator working in the Horn River Basin, the largest shale gas field in Canada, was drilling an extended reach well with high downhole temperatures expected. The Horn River Basin is a very remote area where drilling costs are high, compelling the operator to look for an optimized drilling solution to reduce the days spent to deliver a well in this harsh environment.
Summary Summary Wyoming:Electromagnetic telemetry (EMT) system successfully helped customer reach TD in a single run in high-lost-circulation formation Sign in required
An operator in the Powder River Basin in Wyoming sought to drill an unconventional extended-reach horizontal well to a TD of 20,600 ft (6,279 m) at 11,200 ft (3,414 m) true vertical depth (TVD) while maintaining a tight window of +/- 10 ft (3 m).
Summary Summary Electromagnetic Telemetry (EMT) System
EMT system allows data transmission without a continuous fluid column, providing an alternative to negative and positive pulse systems.
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