Inclinometer: There are three kinds of inclinometers which are HKCX-DZ single point self-floating electronic inclinometer, HKCX-DZ Wired Measurement While Drilling Electronic Inclinometer and HKCX-DZ type multipoint electronic inclinometer. They have many characteristics; such as they can not only be used directly, but also can be used in nonmagnetic collar; and there are many kinds of measuring methods----casting measuring and suspending measuring; the advanced electron technology and machining technics can shorten the instrument length, lighten its weight and predigests the operation process; they can measure the well’s inclination, azimuth and tool face angle of high side for bent sub and so on.