Hydraulic pumping rod connecting and disconnecting device
AssigneeSociete Nationale Elf Aquitaine (Production)
InventorHubert Miffre
Life of this patent
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Abstract
A pumping rod connecting and disconnecting device comprises: a lower production tubing column and an upper production tubing column having a larger diameter than that of the lower column; a connecting piece provided with a circular seat and a circular groove; a lower assembly mounted onto the upper end of a lower pumping rod column and provided with mounting and locking means, as well as with passage means arranged between the spaces located below and above the device; an upper assembly fixed to the lower end of an upper pumping rod column having a continuous axial conduit; and removable blocking means for blocking the locking means of the upper and lower assemblies, connected to a surface source of hydraulic pressure. The device can be used for pumping by means of floating pumping apparatus.
Claims6
A pump rod connecting device for connecting an upper column of pump rods to a lower column of pump rods, and for disconnecting the upper pump rod column from the lower column comprising:
- a tubular production tubing connecting piece connected between upper and lower columns of production tubing, said connecting piece comprising a circular upwardly directed seat and an internal annular circular groove;
- a connector comprising an upper assembly and a lower assembly;
- means for securing said upper assembly to a lower end of the upper column of pump rods;
- means for securing said lower assembly to an upper end of the lower column of pump rods;
- said lower assembly of said connector means for positioning the lower assembly in said connecting piece, comprising locking means for locking said lower assembly in said connecting piece, and means for blocking said locking means, said lower assembly further having passage means for communicating said upper tubing column with said lower tubing column;
- said upper assembly of said connector comprising means for locking said upper assembly to said lower assembly;
- means for moving said blocking means to a position in which said locking means of the lower assembly is unlocked from said connecting piece, and
- hydraulically operated remotely controlled means for releasing said locking means for connecting said upper assembly to said lower assembly so that the upper column of pump rods and said upper assembly secured thereto can be removed from the lower assembly.
Dependencies are inferred from the claim text.