High-temperature deep-well screw drill

高温深井螺杆钻具

Abstract

The invention discloses a high-temperature deep-well screw drill which comprises a drill body coated with a protective layer. The protective layer is prepared by the following steps: (1) selecting 4.2 parts of acrylic resin, 0.8 part of silicate, 1.2 parts of formic acid, 1.1 parts of nano-aluminum oxide powder, 0.4 part of potassium metasilicate and 0.9 part of dimethylethanolamine for sufficiently uniform mixing, so as to obtain a bottom-layer protective coating; (2) selecting 3.2 parts of amino resin, 0.8 part of 4-tert-amylphenol, 0.1 part of talcum powder, 0.4 part of an amide gas-phase rust inhibitor, 0.7 part of selenium acetylacetonate and 0.3 part of zinc carbonate for sufficiently uniform mixing, so as to obtain a surface-layer protective coating; (3) at first, spraying the bottom-layer protective coating onto the surface of the drill body for curing and drying; (4), then, spraying the surface-layer protective coating for further curing and drying. As the drill body of the high-temperature deep-well screw drill is coated with the protective layer, the service life of the high-temperature deep-well screw drill can be prolonged.
本发明公开了一种高温深井螺杆钻具,包括钻具主体,所述钻具主体涂覆有保护层,所述保护层通过如下步骤制得:1)取4.2份丙烯酸树脂,0.8份硅酸盐,1.2份甲酸,1.1份纳米三氧化二铝粉体,0.4份硅酸钾,0.9份二甲基乙醇胺充分搅拌均匀,得底层保护涂料;2)取3.2份氨基树脂,0.8份对叔戊基苯酚,0.1份滑石粉,0.4份酰胺类气相防锈剂,0.7份乙酰丙酮硒,0.3份碳酸锌充分搅拌均匀,得面层保护涂料;3)在钻具主体表面先喷涂底层保护涂料,固化干燥;4)再喷涂面层保护涂料,固化干燥。本发明高温深井螺杆钻具,其钻具主体涂覆有保护层,能提高高温深井螺杆钻具的使用寿命。

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    CN-106084941-ANovember 09, 2016曾冰冰Drilling drill rod protecting coating based on acrylic resin and preparation method thereof