xvi CONTENTS 



Page 



fluid density and subsurface pressures. Solution of pumping problems; 

 dynamic measurements ; maximum pumping efficiencies. Other applications of 

 fluid level measurements ; evaluation studies ; gas lift operations ; gas repres- 

 suring projects; cementing operations; water disposal and supply wells. 

 Future progress of fluid level measurements. 



CHAPTER XIII 

 Land Tenure, Permit and Trespass Practices: Insurance: Patents . . 1143 

 Trespass and land tenure ; petroleum lands ; mining lands ; mining properties. 

 Permit and trespass practice. Insurance; compensation; public liability; auto- 

 mobile. Patent rights; general conditions. Texas Oil Co. vs. Sun Oil Co. 

 Seismic license agreements. Halliburton vs. Walker ; scope of claims. 



INDEX 



1180 



Name and Place Index 1^°^ 



Subject Index 



