man000174 142

i \ c le a n in g t o the bottom o f the w e l l . DAILY LOG AMD REPORT; C o n t r a c t o r s h a l l m a in ta in and f u r n i s h to the E n g in e e r , a d a i l y d r i l l i n g r e p o r t show ing a c c u r a t e ly th e fo rm a t io n and type o f m a t e r ia ls e n c o u n te re d , as w e l l as such o th e r In fo rm a l t i o n as the E n g in e e r may r e q u i r e fro m tim e to tim e. C o n tra c to r s h a l l o b t a in sam ples o f a l l fo rm a tio n s en co u n tered d u r in g d r i l l ­in g o p e r a t io n , s a id sam ples to be p la c e d in Mason j a r s to be f u r n is h e d by Land Company; d ep th a t w hich each sam ple o b ta in e d s h a l l be l a b e l e d on th e j a r . PACKING BETWEEN CASING AND CONDUCTOR P IP E ; A f t e r c a s in g has been i n s t a l l e d , C o n tra c to r s h a l l pack sp ace betw een c a s in g and con d u ctor p ip e w it h cement and sand g r o u t , 50$ cement and 50$ san d , pumped un der p r e s s u r e betw een the two c a s in g s and e x te n d in g as f a r as p o s s i b l e In to fo rm a­t i o n a t the bottom o f the c o n d u cto r p ip e . STRAIGHTNESS ? C o n t r a c t o r a g r e e s t h a t when w e l l s a re com pleted th ey s h a l l be s t r a i g h t enough f o r the i n s t a l l a t i o n and s u c c e s s fu l o p e r a t io n o f a s h a f t - d r i v e n deep w e l l t u r b i R B ^ i t h b o w ls th a t w i l l m easure 1 5 -3 /8 in c h e s 'In d ia m e t e r . C a s in g s h a l l b e caged to a d ep th o f 200 f e e t b e lo w to p o f w e l l . REDUCTION IN SIZE OF CASING; I f in the c o u rs e o f d r i l l i n g s a id 1 6 -in c h w e l l s , sh o u ld I t become im p r a c t ic a b le to c o n tin u e w it h 1 6 -In c h w e l l c a s in g beyond 5 0 0 -fo o t d e p th , the C o n t r a c t o r may, w ith th e a p p ro v a l o f the E n g in e e r , p ro c e e d w ith the w ork o f d r i l l i n g s a id w e l l s to the r e q u ir e d d ep th u s in g the n ex t s i z e c a s in g most p r a c t i c a l , w hich s h a l l b e not l e s s than 12 in c h I . D . d o u b le w a te r w e ll c a s in g 8 g a u g e . Minimum amount o f 1 6 -In c h c a s in g to b e I n s t a l l e d fro m to p o f w e l l s s h a l l be 500 f e e t . - 5 -