| Popis: |
With the increase in drilling activity in new subsea and deep water exploration and development, a reliable means of intervention-less completion technology has become a major consideration in helping to reduce operational risk and achieve economic exploitation of new hydrocarbon reserves. Although intelligent completion methods have been in use for some time, the communication system they require can be expensive and time consuming and the need for a simpler, more cost effective, method of intervention-less well completion and management is clearly an attractive option. To simplify the completion process, a new system has been developed which uses the well tried and trusted communication method known as Radio Frequency Identification (RFID). RFID is a reliable well proven technology which is used in countless applications in daily life; however its applicability to the oil and gas industry is only now beginning to be recognized. In this system tubing mounted control modules, which are capable of performing a number of key completion operations, are activated by simply dropping and pumping down RFID tags or, where pumping down is not possible, by the application of pressure cycles. This system consists of several primary components as follows: Battery powered control module with antenna and processors, motor, pumps and closed hydraulic reservoir.A circulating control valve functioning as a sliding sleeve.A hydraulic set packer.A barrier valve. Using these modules all the operations involved in an upper well completion can be performed free of interventions. This paper will give an introduction of RFID technology and present operational mechanism in detail for key accessories of this new intervention-less completion system; and also display one typical logic application of sequence of operations for a new intervention-less upper completion system. |
