Support with limiting collar for casing string, for locking by abutment above the mandrel of the drilling equipment

Abstract

To lock the coating column to the probing equipment chuck. The equipment consists of a support ( 1 ) used between the probing equipment hoist and the coating tube column (for gas/oil shaft cementing). Prior to its threaded nozzle ( 5 ), the support ( 1 ) gets a collar ( 6 ) with a diameter bigger that the probing equipment chuck (M) opening radius. When the chuck cylindrical bracket (M) is opened, for inserting or removing the coating column (R) along with the drilling shaft (PO), in case of probing hoist cable (CA) breakage, as an example, the sudden lowering of a coating column inside the shaft (PO) is prevented by the collar ( 6 ) locking over the chuck (M) open cylindrical support in a stopper system. This way, expensive and time-consuming procedures for recovering coating columns (R) from the gas/oil probe drilling shaft (PO) bottom are avoided.

1 ) “SUPPORT WITH DELIMITING COLLAR FOR A COATING COLUMN”, comprised of a support ( 1 ) used during the assembly, lifting and lowering of coating tubes (T) of the coating column (R), fixed or free to/from the chuck (M) cylindrical bracket (M), on the gas/oil probing equipment platform, along with the drilling shaft (PO), as said support ( 1 ) equipped with an eyelet ( 2 ) in its upper part ( 3 ), from which extends its tubular structure ( 4 ) that has a lower inner threaded nozzle ( 5 ), characterized by said support ( 1 ), incorporating, before the threaded nozzle ( 5 ), a stress ( 7 ) staggered collar ( 6 ). 
     
     
         2 ) “SUPPORT WITH DELIMITING COLLAR FOR A COATING COLUMN”, according to  claim 1 , characterized by the support ( 1 ) collar ( 6 ) dimensioned with a diameter bigger than the chuck (M) cylindrical support opening radius in the probing equipment. 
     
     
         3 ) “LOCKING THE STOPPER SYSTEM ABOVE THE PROBING EQUIPMENT CHUCK”, according to  claims 1  and  2 , after assembling the coating tube column (T), as the support ( 1 ) is attached to the probe hoist cable (CA) by a hook (G) and the coating column (R) is fixed by the chuck cylindrical bracket (M), while opening the latter and as said coating column (R) is lifted to be inserted or removed from the shaft (PO), in case of breakages, avoiding sudden lowering, characterized by the collar ( 6 ) locking over the chuck (M) cylindrical support, in a stopper system.