Method and Device for Producing an Opening from a Motherbore and into a Formation

Abstract

A method and device for producing an opening from a motherbore into the surrounding formation, wherein the method includes: positioning a motor, having a rotatable barrel, in the motherbore; passing an elongated body through the barrel; and letting the motor rotate the elongated body as the elongated body is moved along the barrel and into the formation.

1 . A method for producing an opening from a motherbore into the surrounding formation, wherein the method comprises:
 positioning a motor, having a rotatable barrel, in the motherbore;   passing an elongated body through the barrel; and   letting the motor rotate the elongated body as the elongated body is moved along the barrel and into the formation.   
     
     
         2 . A method according to  claim 1 , wherein method comprises positioning the rotatable barrel at a rotational axis of the motor. 
     
     
         3 . A method according to  claim 1 , wherein the method further comprises positioning a first, second or third guide for the elongated body at least at a first or second end party of the barrel. 
     
     
         4 . A method according to  claim 1 , wherein the method further comprises giving at least a part of the barrel a noncircular cross section, and giving the elongated body a corresponding cross section. 
     
     
         5 . A method according to  claim 1 , wherein the method further comprises positioning the motor at least partly outside a motherbore tubular. 
     
     
         6 . A method according to  claim 1 , wherein the method further comprises positioning the motor at least partly inside a motherbore tubular. 
     
     
         7 . A method according to  claim 1 , wherein the method further comprises positioning the motor at the leading end party of a motherbore tubular. 
     
     
         8 . A method according to  claim 1 , wherein the method further comprises choosing the motor from a group including electric, hydrostatic and hydrodynamic motors. 
     
     
         9 . A method according to  claim 1 , wherein the method further comprises connecting a bit to the leading end party of the elongated body. 
     
     
         10 . A device for producing an opening from a motherbore into the surrounding formation comprising:
 a motor that is positioned in the motherbore, the motor having a rotatable barrel;   an elongated body that passes through the barrel and is directable into the formation.   
     
     
         11 . A device according to  claim 10 , wherein the rotatable barrel is positioned at a rotational axis of the motor. 
     
     
         12 . A device according to  claim 10 , wherein a first, second or third guide for the elongated body is positioned at least at a first or second end party of the barrel. 
     
     
         13 . A device according to  claim 10 , wherein at least a part of the rotatable barrel is non-circular and where the elongated body has a complementary cross section. 
     
     
         14 . A device according to  claim 10 , wherein the motor is positioned at least partly outside a motherbore tubular. 
     
     
         15 . A device according to  claim 10 , wherein the motor is positioned at least partly inside a motherbore tubular. 
     
     
         16 . A device according to  claim 10 , wherein the motor is positioned at the leading end party of a motherbore tubular. 
     
     
         17 . A device according to  claim 10 , wherein the motor is chosen from a group including electric, hydrostatic and hydrodynamic motors. 
     
     
         18 . A device according to  claim 11 , wherein the guide passes through a motherbore tubular. 
     
     
         19 . A device according to  claim 10  wherein the elongated body has a symmetrical cross section. 
     
     
         20 . A device according to  claim 10  wherein the elongated body has a non-symmetrical cross section. 
     
     
         21 . A device according to  claim 10 , wherein a bit is connected to the leading end party of the elongated body. 
     
     
         22 . A device according to  claim 10 , wherein the device mainly consists of acid or alcaline soluble material.