Drilling mud additives

Drilling fluids Drilling glass Drilling mud additives Drillingmuds... 

Benzoic acid is also used as a down-hole drilling mud additive where it functions as a temporary plugging agent in subterranean formations. Since this is a secondary oil recovery appHcation, this use is heavily dependent on the price of cmde oil. 

The most common, commercially available drilling mud additives are published annually by World Oil. The listing includes names and description of over 2,000 mud additives. 

Uintaite is not easily water wet with most surfactants. Thus, stable dispersions of uintaite are often difficult to achieve, particularly in the presence of salts, calcium, solids and other drilling fluid contaminants and/or in the presence of diesel oil. The uintaite must be readily dispersible and must remain water wet otherwise it will coalesce and be separated from the drilling fluid, along with cuttings at the shale shaker or in the circulating pits. Surfactants and emulsifiers are often used with uintaite drilling mud additives. 

K. Christensen, N. Davis, II, and M. Nuzzolo. Water-wettable drilling mud additives containing uintaite. Patent EP 460067, 1991. 

The data from these first two batch tests indicated that poly(lignin-g-(l- amidoethylene)) hag properties which make it a potentially effective drilling mud additive. The tests show that poly(lignin-g-(l-amidoethylene)) and its hydrolyzed derivatives act as a high temperature thinner and as a filtrate control agent. The... 

The most widely used synthetic and natural enhanced oil recovery polymers, such as partially hydrolyzed polyacrylamide, carboxymethyl(ethyl) cellulose, polysaccharides, or xanthan gums, are not suitable for high-temperature reservoirs (> 90 °C) with high-density brine fluid due to excessive hydrolysis and precipitation [277]. The main advantages of polymeric betaines over the mentioned standard polymers are (1) thermostability (up to 120 °C) (2) brine compatibility and (3) viscosification in brine solution [278]. Carbobetaines grafted onto hydroxyethyl cellulose were tested as a drilling-mud additive for clay hydration inhibition and mud rheological control [279]. An increase in the content of carbobetaine moieties resulted in an enhanced inhibitive abiUty, especially for sahne mud. 

Carboxylmethyl cellulose (O Scheme 1) is produced in many grades by many manufacturers owing to its various end use applications as well as simple reaction protocol. CMC is used in detergents, paper coatings, drilling mud additives in oil well drilling, cosmetics and pharmaceuticals (as fat free ointments for example) and in food products (soups, ketchups, etc.). 

Cydril [Cytec]. TM for a drilling mud additive, shale stabilizer and viscofier. 

Use Dispersing agent in concrete and carbon black-rubber mixes, extender for tanning agents, oil-well drilling mud additives, ore flotation agents, production of vanillin, industrial cleaners, gypsum slurried, dyestuffs, pesticide formulations. Commercially available as the salts of most metals and of ammonium. 

Saponified polyacrylate-grafted starches have been designed as drilling-mud additives, hydraulic fluids, and flocculants,2982,3056 PVC gaskets,3057 and components of biodegradable plastics.3058-3060 Such copolymers, either free or as... 

Mor-Rex L [Grain Processirtg] Malto-dextrin drilling mud additive. 

USE Stabilizer, thickener, and binder in foods and cosmetics. Coffee, chocolate, cocoa substitute. Sizing aud finishing agent in textiles. As fiber bonding in paper manuf. Drilling mud additive. therap cat Adsorbent-demulcent,... 

In addition to the reservoir fluid samples studied, a sample of the NovaPlus synthetic oil base drilling mud additive used in each well was analysed using the methods described above. 

Fig. 7. Whole oil gas chromatograms of (A) a saturated low gravity oil and (B) an undersaturated high gravity oil, each representing oil end-members annotated in Figure 6. API gravity of the saturated sample has been corrected for 5.5% oil-based mud contamination which is also responsible for elevated amounts of nCii- C,g. The gas chromatogram shown in (C) shows the drilling mud additive used in the exploration and appraisal wells.

Many attempts were made to convert lignin to a useful material for coatings and adhesives. Only very limited success, however, has been achieved. A reaction product with formaldehyde can be used as a wood adhesive. In addition, lignin obtained from wood pulping by the sulfate process (as a sulfonate) has been utilized to a limited extent as an asphalt extender and as an oil-well drilling mud additive. 

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