Conductor system

Abstract

A method of installing a conductor or a casing in the sea bed, the conductor or casing being caused to penetrate a sea bed, the conductor or casing being substantially suspended from a length of coiled tubing. The conductor or casing being lowered to the sea bed by means of the coiled tubing, the coiled tubing being deployed from a reel on a floating vessel. Ideally a conductor may be deployed in the sea bed at the desired location, and subsequently a casing is introduced to the conductor. Alternatively the casing is introduced into a conductor, the casing and conductor substantially suspended from a length of coiled tubing, lowered to the sea bed by means of the coiled tubing, and caused to penetrate the sea bed. A length of coiled tubing is then introduced to the conductor or casing.

What I claim is:  
     
         1 . A method of installing a conductor or a casing in the sea bed, the conductor or casing being caused to penetrate a sea bed, characterized in that the conductor or casing is substantially suspended from a length of coiled tubing, the conductor or casing being lowered to the sea bed by means of the coiled tubing, the coiled tubing being deployed from a reel on a floating vessel.  
     
     
         2 . A method according to  claim 1 , characterized in that the conductor or casing is a conductor deployed in the sea bed at the desired location, and subsequently a casing is introduced into the conductor.  
     
     
         3 . A method according to  claim 1 , characterized in that a casing is introduced into a conductor, the casing and conductor substantially suspended from a length of coiled tubing, lowered to the sea bed by means of the coiled tubing, and caused to penetrate the sea bed.  
     
     
         4 . A method according to  claim 1 , characterized in that the length of coiled tubing is introduced to the conductor or casing.  
     
     
         5 . A method according to  claim 1 , characterized in that the length of coiled tubing is introduced to extend along the length of the conductor or casing.  
     
     
         6 . A method according to  claim 1 , characterized in that the penetration is effected or assisted by fluid being passed through the length of coiled tubing.  
     
     
         7 . A method according to  claim 6 , characterized in that the fluid passes through the annulus between the coiled tubing and conductor or casing in the opposite direction to the direction of flow through the coiled tubing.  
     
     
         8 . A method according to  claim 1 , characterized in that the coiled tubing is disconnected from the conductor or casing after the conductor or casing have been embedded in the sea bed.  
     
     
         9 . A method of installing a well conductor or casing in a sea bed, the conductor or casing being caused to penetrate the sea bed, characterized in that there are included sensor means held in proximity to the conductor or casing, such that the sensor means gather data by which means information regarding the position of the conductor or casing may be calculated.  
     
     
         10 . A method according to  claim 9 , characterized in that a casing is introduced into a conductor, substantially suspended from a length of coiled tubing, lowered to the sea bed by means of the coiled tubing, and caused to penetrate the sea bed, the coiled tubing being deployed from a reel on a floating vessel.  
     
     
         11 . A method according to  claim 9 , characterized in that the sensor means comprises one or more sensors including gyroscopes.  
     
     
         12 . A method according to  claim 9 , characterized in that the sensor means are moveable relative to the conductor and/or casing along at least part of the length of the conductor and/or casing.  
     
     
         13 . A method according to  claim 9  characterized in that a length of coiled tubing is introduced to the casing and the sensor means are deployed on the coiled tubing.  
     
     
         14 . A coiled tubing system comprising a conductor and/or casing and length of coiled tubing according to  claim 1.