738 



Subsurface Geologic Methods 



time and at considerably less cost than production testing. It is 

 for this reason that casing or hook-wall packer testing has be- 

 come so prominent. This type of testing is made possible by at- 

 taching the testing equipment to a hook-wall packer that may be 



>^ 



'^& 



^—BY-PASS CHOKE 



6-7 HOOK WALL 



<X PACKER 



-J-20 BY-PASS 



-PERFORATED 

 ANCHOR 



ARROWS INDICATE 

 VISIBLE TOP PART 

 OF EACH ASSEMBLY 



-THREAD 

 PROTECTOR 



i; 



^ 



-BY-PASS CHOKE 



-ADAPTER 



-DE WALL PACKER 



-ANCHOR SHOE 



f»=^;^^ DRILL PIPE 



'J<k TOOL JOWT 



^^ TESTER 



-BY-MSS CHOKE 



h 



J-20 CLOSED I ••! 

 V PRESSURE JAR 



-^DE WALL PACK!. 

 Ur^ SHALE 

 -^SANO 



Figure 396. Various types of packer combinations. Hook-wall-packer test (left) ; 

 double-wall-packer test (middle) ; wall-packer test with type AP pressure-record- 

 ing devices (right). 



