73715060
Mar 7, 1988
Dec 22, 1992
CHEMICAL PRODUCTS FOR USE IN INDUSTRY; NAMELY, OIL AND GAS FIELD CHEMICALS FOR USE IN AND ANCILLARY TO OIL AND GAS EXPLORATION, DEVELOPMENT, PRODUCTION AND TRANSPORTATION; CHEMICALS FOR CLARIFICATION OR VISCOSITY CONTROL OF FLUIDS USED IN OIL AND GAS WELLS AND RESERVOIRS AND CRUDE OIL; CHEMICALS FOR THE PROTECTION OF OIL RESERVOIRS AND EQUIPMENT FROM DAMAGE; CHEMICALS FOR MAINTAINING THE FLOW OF OIL IN OIL WELLS; DRILLING MUDS AND INGREDIENTS THEREOF; CHEMICALS FOR USE IN CEMENTING OIL AND GAS WELLS; CHEMICALS FOR COMPLETION AND WORKOVER OF OIL AND GAS WELLS; CHEMICALS FOR STIMULATION OF OIL AND GAS WELLS INCLUDING ACIDISATION AND FRACTURING, AND CHEMICALS USED IN ENHANCED OIL RECOVERY
Chemicals