Now available is an expanded range of equipment for electric wireline in coiled tubing.
The company reports that four new items have been developed to facilitate logging and perforating on coil:
• Eight-way collector bulkhead, (10,000 psi)—utilizes a bulkhead with seven-conductor feed-through and boot assembly.
• Electrical release for the 27⁄8 in. seven conductor cable head—helps ensure reliable and safe termination downhole.
• 13⁄4 in. single conductor cable head—with electrical and mechanical release options for smaller tubing sizes and restrictions.
• A dual polarity electrical release for multiple shot perforating operations that require positive and negative current for firing.
The development of two new electrical releases extends the tool's application in perforating where use of a mechanical shear release poses the risk of release upon detonation, the company points out. To be safe, an electrical release should be used when perforating to achieve a controlled release, something that is not possible with a safety joint, the firm says.
All components of this wireline CT equipment range, including the four new elements, are compatible with most types of electric wireline in use today.
Source: AnTech Ltd., Unit 7, Newbery Centre, Airport Business Park, Exeter, UK EX5 2 UL.
New atomic clock aids explorationA new chip scale atomic clock (CSAC) is designed to meet the needs of marine-based oil exploration.
The CSAC combines the accuracy and stability of atomic clock technology along with size, weight, and power benefits that help suit it for small-form-factor uses requiring long battery life.
The company notes its use in marine geophysical sensors: When ship crews are seeking places to drill, they send out acoustic pulses that hit and penetrate the ocean floor. Sensors time-stamp when the pulse is received, and postprocessing of sensor data shows likely places to drill. Today, the firm says, most marine sensors have been using oven-controlled crystal oscillators (OCXOs) as clocks. OCXOs have limited battery life, are subjected to extreme cold water temperatures that can erode performance, and age at a rate that produces an error that varies as a square of time underwater, the company says.
This firm's SA.45s CSAC offers superior battery life, a superior temperature coefficient, and aging advantages that will prolong the life of the sensors and enhance overall monitoring activities.
Source: Symmetricom Inc., 2300 Orchard Parkway, San Jose, CA 95131.
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