Combination downhole tool

A borehole clean out and fishing tool for use on a drill string, comprising:

• a connector sub including a threaded box end, and a length of polish pipe having an axial bore and first splines around a lower threaded end;
• a cylindrical sleeve having an inner sidewall and end wall with axial hole, and concentric seal means surrounding said hole such that said polish pipe fits slidingly sealed within said hole and seal means, the sleeve defining a cylindrical cavity with second splines formed around the upper periphery;
• a cylindrical hub having a central bore with first grooves spaced around the outer circumference and second grooves spaced around the central bore, said hub being received up within the cylindrical sleeve with first grooves engaging said second splines while said connector sub first splines are engaged with the second grooves;
• a plurality of shear pins of selected shear resistance disposed through the cylindrical sleeve sidewall into the cylindrical hub;
• an extension sub disposed below said hub central bore for threaded connection to said connector sub first end;
• a selected fishing tool secured to extend axially from said extension sub;
• an extension sleeve threadedly connected to said cylindrical sleeve and normally extending down over the fishing tool;
• and
• a clean out tool secured to extend downward from said extension sleeve;
• whereby drill string rotation will be transmitted through to the clean out tool until the drill string weight is increased sufficiently to shear the shear pins whereupon the drill string drops downward until the fishing tool is engaged and rotation can recommence.