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Fluid Seal and Torpedo
 The fluid seal is used to prevent drilling fluid from being released in large quantities on the rig floor. The device consists of rubber packing element surrounded by a steel enclosure. The logging cable is passed through the seal prior to logging, and the tool string is then rigged up. Following the completion of tool rigup, the seal is slid down the cable and fastened to the logging pipe.
The torpedo is a small stainless steel connector used for connecting two pieces of logging cable. A good example is the connection between the cablehead pigtail and the logging cable. The torpedo consists of two symmetrical halves which make a small enclosure for establishing conductor continuity between each cable. Each piece of cable must contain a rope-socket and exposed conductors for the torpedo connection to be complete. A torpedo connection should not pass over a sheave.
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MCM
Acquisition of log data is completed in the Minimum Configuration MAXIS (Multitask Acquisition & Imaging System) located just port and forward of the helipad. Presently, the MCM contains two VAX processors and numerous control and power modules which communicate with the downhole tools during logging. Real time displays of all log data may be viewed from here; thus, you will usually find the loggers here during logging operations. The MCM is capable of communicating with all labs and workplaces on the ship and an intercom link exists with the winch shack. A color plotter is available for producing log reprints.
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Two views of the Minimum Configuration MAXIS (MCM) system.
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Downhole Measurements Lab (DHML)
 The logger's scientific domain aboard the JOIDES Resolution is the Downhole Measurement Lab (DHML). Located atop the lab stack, the DHML contains two Mac Computers, one PC for data acquisition, one Sun Ultra-Sparc and a Laserjet printer. The third party data acquisition system is housed in the DHML, as well as additional rack space for other equipment deployments.
Hand tools and supplies are furnished by LDEO-BRG.
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Conical Sidewall Entry Sub (CSES)
 The CSES was tested successfully on Leg 108. When inserted into the drill string, it allows one to add or remove drill pipe while a logging tool is downhole. The CSES strategy is to lower pipe to near the bottom of the hole, lower the logging tool into open hole just beneath the pipe, then log up while simultaneously pulling pipe at the same speed. In this way open hole logs are obtained without allowing enough time between pipe removal and logging for bridges to form.
Drill String Acceleration Tool / Core Barrel Temperature Tool
The Drill String Acceleration tool (DSA) is a modular downhole tool designed to acquire data near the bit in memory. The DSA is attached to virtually any core where it measures drillbit acceleration and vibration signals while drilling. The DSA tool contains a single axis high sensitivity accelerometer for heave measurements, a three-axial high frequency accelerometer for drillbit vibrations and a high resolution pressure sensor. For ease of deployment, the DSA has been designed as a removeable extension of the APC/XCB/RCB core barrels. Using standard threaded connections, the DSA will be attached to the top of a selected core barrel by a Core Tech prior to core barrel deployment. Except for the connection and disconnection of the DSA, coring activities will not be affected by the presence of the DSA. Upon DSA/core barrel retrieval, the DSA will be disconnected and the data downloaded to the third party data acquisition system in the DHML for immediate analysis.
The modular design of the DSA allows for customization of the sensor packages. The acceleration and pressure measurements may be swapped for high fluid temperature measuring equipment. In the high temperature fluid temperature monitoring mode, the tool name changes to the Core Barrel Temperature Tool (CBTT). Many additional measurement possibilities exist but have not been designed and implemented do date.
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