A downhole, adjustable, multiangle bent sub, called Telepilote®, has been developed for remote control of the wellbore path on a real-time basis without changing the general bottomhole assembly (BRA) configuration. Different modes of actuation for changing the bent sub correspond to different types of construction. The tool is available in 6*-,7*-,8-, and 9 1 /2-in. [17.1-, 19.7-,20.3-, and 24.1-cm] nominal sizes. It can be set at six positions, from zero (or straight position) to a maximum angle position of 2 0 , 2 0 30', or 3 0 , according to nominal sizes. The main construction features and different drilling applications are presented. In addition, the T-3000 Telepilote is described, which features the Telehydrocom® (TRD) actuator system. This system makes an immediate, direct hookup in the drill string between the sub and all survey instruments, including measurement-while-drilling (MWD) systems, possible.
MURPHY Sabah Oil Co. Ltd. has developed the Kikeh Field located offshore Malaysia in the South China Sea in a water depth of 1325m. This field development is based on a Floating Production Storage and Offloading unit (FPSO) and a Spar Dry Tree Unit (DTU). Fluids are transported in fluid transfer lines (FTL) using SBM’s newly developed and patented Gravity Actuated Pipe (GAP) system. The launch of the first GAP took place on the 8th and 9th of May 2007 in Bintulu (Malaysia). This was the first major milestone in the GAP system installation campaign. The overall length of the GAP, the weight of both towheads, the constraints imposed by the selected site and the need to cope with the environmental data made it a very challenging operation. This paper describes the constraints, pre-launch activities and the onshore and offshore spread used during the main steps of the launch.
Offshore production from subsea completions is more and more controlled by means of sophisticated electro-hydraulic control systems, which imply the use of underwater make and break electrical connectors.The growing need of automations due to the maintenance requirements and the extension to greater depths has led to the development of original concepts of such types of automatic connectors.
For over twenty years, the Institute Francais du Petrole has researched remote-controlled drilling. As wells go deeper and are more slanted, and sometimes horizontal, such facilities are essential. Control is by wireline transmission of bottom-hole data and control of downhole functions. There are three main components:–a directional unit (magnetic-accelerometer type);–a bottom-hole drilling parameters measuring unit (with various sensors to measure the required parameters, fully pressure compensated);–a variable-angle bent sub (rotation of the lower part of a sub around a tilted axis). (Figure in full paper) Operational results for the directional unit, and test data for the other components indicate satisfactory performance. In the future besides marketing existing industrialized tools, the design of tools in diameters other than the 7%-in. selected for the prototypes will be undertaken and sensors for measuring logging parameters and safety parameters will be added. Introduction The earliest application of directional drilling was in boreholes which were in bad shape and required side-tracking because of fish in the hole. Remote-control methods are, therefore, particularly useful. Directional wells are also needed to intersect with and kill wild wells. In 1962, the Institute Francais du Petrole launched a research· program in the area of telemetry and remote control(l). Directional drilling is now used on offshore platforms, to drill in faulted zones, in the presence of salt domes and in inaccessible terrain. The remote-controlled drilling system designed by the Institute Francais du Petrole consists of the following components:A powerful downhole motor, capable of drilling the entire well, including the highly slanted part, with conventional or heavy drill stems.A wireline telemetry system permanently connected during drilling to the downhole sensors for measurement of the directional parameters, including borehole azimuth, drift and bent sub position. Mechanical parameters such as weight on bit, torque, pressures and temperatures inside the drill stem and in(Figure in full paper)the annular space, and motor r.p.m, are recorded. Logging parameters, including mud resistivity inside and outside in the annular space, true resistivity and natural gamma radiation of the formations, are also transmitted.A variable-angle bent sub controlled from the surface by the same conducting wireline used to correct the trajectory.Surface equipment designed to read, record and process the above. Description of the System The remote-controlled drilling system (Fig. 1) adapts to conventional drilling systems with downhole motors. A downhole motor may be of the turbine or of the positive-displacement type. A TELEPILOTE variable-angle bent sub controlled from the surface, a TELEVIGILE drilling parameter measuring sub, an orienting sub and an AZINTAC directional measurement sonde placed inside a nonmagnetic drill collar make up the detecting devices. A single-conductor electrical cable runs through a lateral window sub into the annular space of the vertical or subvertical part of the borehole. A winch and conventional surface equipment are used to wind the cable. An electronic console equipped with a minicomputer performs data processing, display and recording.
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