Bottom hole completion system for an intermittent plunger

Abstract

A bottom hole assembly for an intermittent lift plunger system includes a retrievable downhole anchor which may be set and reset in one downhole trip, a retrievable packing device, and a plunger stop.

What is claimed is: 
     
         1 . A retrievable bottom hole anchor comprising:
 (a) a hollow cylindrical mandrel having a lower end and an upper end having a cone, said upper end adapted to accept a wireline running or pulling tool;   (b) a J-slot sub engaging the lower end of the mandrel, said sub defining a patterned slot having a running position, a pre-set position, a set position, and a retrieving position;   (c) a slip assembly comprising:
 i. a lower housing having an upper end comprising a slip cage and a lower end comprising a housing, concentrically disposed around the J-slot sub; 
 ii. means for frictionally engaging the tubing; 
 iii. at least one pin disposed between the lower housing and the J-slot sub, which pin engages the slot defined by the J-slot sub; 
 iv. at least two slip arms each having an upper end and lower end, wherein the lower end is retained by the slip cage and the upper end comprises a tubing engaging slip, said slip arms moveable between a retracted position and an extended position wherein each said dog disposed to slide over the cone when the slip assembly is actuated; 
   (d) wherein the mandrel and J-slot sub is moveable relative to the slip assembly between a running position where the pin is located in the running position in the slot and the slip arms are in the retracted position, a set position where the pin is located in the set position in the slot and the slips arms are in the extended position, a pre-set position intermediate the running position and the set position, and a retrieving position where the pin is located in the retrieving position in the slot and the slips arms are retracted;   (e) and wherein the anchor may move between the running, set and extended positions by lifting and dropping the J-slot sub relative to the pin.   
     
     
         2 . The bottom hole anchor of  claim 1  wherein the slot pattern is repeated at least twice on the J-slot sub, and the pawl and bearing assembly comprises at least two pins, wherein each pin engages a separate slot pattern. 
     
     
         3 . The bottom hole anchor of  claim 1  wherein the means for frictionally engaging the tubing comprises at least one belly spring. 
     
     
         4 . The bottom hole anchor of  claim 2  wherein the slip assembly comprises a bearing ring comprising the at least two pins and a rotary thrust bearing for limiting vertical movement of the bearing ring while reducing rotary friction. 
     
     
         5 . The bottom hole anchor of  claim 5  wherein the rotary thrust bearing comprises a first bronze bearing placed above the bearing ring and a second bronze bearing placed below the bearing ring.