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31. The mechanisms and characteristics for the polyglycol - based drilling fluid have been reviewed.

32. Two reverse rotation self-synchronization motors are used in Model ZS6B drilling fluid linear shale shaker as the vibrator, which makes the screen box produce linear vibration.

33. The transmission velocity increases with the pulse frequency increasing and there is a stable transmission frequency for drilling fluid system.

34. Film-forming resin FGA, a saturated carbon-chain non-ionic polymer, can be used as anti-sloughing a-gent in drilling fluid.

35. The high cost of transportation and treatment make a strong push for foreign drilling companies and drilling fluid companies to study and develop new techniques for local treatment of oily cuttings.

36. The operating personnel can observe filter loss of drilling fluid.

37. This drilling fluid meets the requirements of aerated drilling technology.

38. Test results show that by adding suitable amount of polyglycol and temporary plugging agent in the foam drilling fluid, the permeability recovery increases from 66.

39. Wettability reversal agent is an important additive for oil base drilling fluid.

40. The research and application of water soluble polymer drilling fluid additive in China are reviewed.

41. Aerated mud is a kind of drilling fluid with gas, liquid and solid triphase matter distributed evenly and stably.

42. The degasification mechanism of a vacuum drilling fluid degasser, the matching of the vacuum pump with sewage pump and the selection of various parameters are discussed.

43. The reclaiming of waste drilling fluid embodies in the reclaiming of heavy loader, which is because the cost of heavy loader is 50% of the total cost of drilling fluid.

44. To comply with the special request of protecting the formation and environment against damage on oil-gas field development offshore, a new drilling fluid system—methyl glucoside(MEG)was developed.

45. This paper introduces the application of polyol drilling fluid in Hongtai area of Tuba oilfield.

46. In this paper, the characteristic and functional mechanism of the surfactant was studied, and property of alkyl indicant drilling fluid was evaluated also.

47. The property, lubricity, compatibility with drilling fluid, anti-pollution ability of HRH-101 are evaluated by experiment in lab and selected the amount of optimum addition.

48. The low density drilling fluid has borehole excavation effect on compensated neutron porosity logging, and by this way apparent porosity is lower than the true value.

49. However, it is to be noted that proper selection of bit type and drilling fluid properties are required for taking full advantages of this technology.

50. A multifunctional additive ARJ for drilling fluid was synthesized by emulsion polymerization.

51. Meanwhile , the paper proposes that using oil - base drilling fluid can prevent the reservoir damage.

52. The rheologic model of three - phase foam drilling fluid can be optimized with grey correlation analysis method.

53. The transmission velocity decreases and the stable transmission frequency of pulse increases with the hydraulic friction coefficient of the drilling fluid increasing.

54. Results showed that the hydrate forming is effectively suppressed when a few hydrate inhibitor HBH ( about 0. 5%) was added into the drilling fluid.

55. The drilling fluid used in petroleum and geology exploration was monopolized by anion - type mud system.

56. In order to prevent drill fluid splash during drilling tool connection, condensed air is injected into standpipe to drive drilling fluid down.

57. The drilling fluid pulse transmitting up and down along well bore had refraction and reflection components similar to damped oscillation at the boundary of system.

58. The heteropoly glucoside biological drilling fluid is a new drilling fluid.

59. Field using shows that optimized drilling fluid system " polyol - positive colloid polymer drilling. "

60. This paper also discusses the engineering of the new drilling fluid.