which may reduce clogging of the screens s 1 and s 2 as a result this may also reduce the need for rig workers to regularly inspect and clear clogged shaker screens in certain embodiments methods of operating the system of the present invention include an automatic shut off of the regenerative fan blower 34 at intervals ranging from about 10 to about 20 minutes for a period of about 10 to about 20 seconds after which the regenerative fan blower 34 is re started drill fluid recovery system with primary fluid recovery driven by an air distribution and fluid dump assembly and secondary fluid recovery driven by a hydrostatic chamber in accordance with another embodiment of the present invention and with reference to fig3 there is shown another system 100 for recovering drilling fluid from drill cuttings system 100 has many features similar to the features of the embodiment shown in fig2 and therefore similar reference numerals are used in the ensuing description of operation of this system the main difference between system 10 fig2 and system 100 fig3 is that system 100 is provided with a conduit connector unit which is herein described as the u201c air distribution and fluid dump assembly u201d the air distribution and fluid dump assembly 15 is connected to vacuum conduits 14 a and 14 b and to vacuum conduit 16 which leads to the hydrostatic chamber 20 it is to be understood that the structure of the air distribution and fluid dump assembly 15 can be modified to include additional ports for additional conduits originating from additional shaker screens the air distribution and fluid dump assembly 15 is provided with a fluid dump port 17 which faces downward from the main body of the air distribution and fluid dump.