means 106 disposed therethrough with three of the control valve means 106 being plugged by plug elements 200 approximately 180 u00b0 from the first control valve means 106 is the equalizing valve means including control fluid passageway 301 valve head stem 304 and cylinder member 320 as further described hereafter as shown in fig4 which is as stated in the description of the drawings above a partial longitudinal section view taken along line 4 4 of fig3 showing the plug means 200 of the present invention being substituted for a valve head 108 and valve seat 107 combination one or more of the passageways 123 may contain a plug element 200 which is secured to the ported second housing 105 by means of a shearing 201 shear pin or the like thus the plug means 200 replacing one or more of the control valve means 106 the control mandrel 115 has at its upper end an enlarged top spring seat 117 which receives the lowermost end of a power spring 116 the power spring 116 is housed radially around the exterior of the inner conduit 102 and has its uppermost end arrestingly secured on the lower face of a bottom spring seat 118 secured to the inner conduit 102 by means of a lock nut 119 the power spring 116 is in effect a biasing means and may be provided in the.