slightly modified relative to the prior art with reference to fig4 and 5 the distinction between the shoes of the prior art and those employed herein is discussed the uphole end of the liner is illustrated in fig4 while the downhole end is illustrated in fig5 referring to fig4 the liner 10 is illustrated being supported at an inside dimension thereof by a pressure relief plug 20 one of ordinary skill in the art will recognize the relief plug because it is almost identical to such plug as was used in the prior art the only difference in this plug is that the outside dimension thereof is larger than the prior art it is larger by about a u215d inch over the diameter thereof so that a clearance of about 3 32 inch is available between the liner 10 and the plug 20 the clearance is identified at 22 as the balance of the plug is known no further discussion thereof is necessary referring to fig5 the downhole end of liner 10 is illustrated in assembled form with a coring assembly so that the unique support therefore may be appreciated one of ordinary skill in the art will recognize the top end.