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沂源队钻工张玉福同志仿照苏联深井测斜方法试制了每次可以节约一次升降钻具的测量钻孔弯曲度的方法。该方法是利用一特制保护器接在岩心管异径接头下面进行的。保护器构造如下图：（1）保护器外套（分上中下三段）；（2）特制胶塞；（3）锌片；（4）玻璃瓶（装有氟氢酸）；（5）橡皮塞或湿棉球。测量方法：系先将使用的岩心管下入孔内，其上端用夹板夹住，卸掉岩心管接头，在老虎钳上把岩心管接头与保护器拧在一起（岩心管接头下端与保护器上端车成相符的公母扣）。然后再与岩心管相接，接上钻杆，降至欲测井深，停留一定时间，氟氢酸即在玻璃瓶上刻有印痕，因氟氢酸与锌片相作用，即将锌片蚀透，氟氢酸溶液沿胶塞小孔漏入保护器下部，玻璃瓶即行干涸，此时即可进行钻进，待钻到一定回次进尺长度后，再行提钻，因此，可减少一次升降钻具时间，从而可提高时间利用率，在深孔中收效尤为显著。
Yiyuan team driller Comrade Zhang Yufu modeled Soviet deep well test oblique method trial can save each time lifting drill measuring drilling curvature method. The method is to use a special protector connected to the core pipe under the joint. Protector structure as shown below: (1) Protector jacket (on the lower three sections); (2) special rubber stopper; (3) zinc sheet; (4) glass bottles Rubber plug or wet cotton ball. Measurement method: The first use of the core pipe into the hole, the upper end of the clamp with the clamp, remove the core pipe joints, the core pipe fittings and vise screwed together (the lower end of the core pipe joints and the top of the protector Car into the match between male and female deduction). And then connected with the core pipe, connected to the drill pipe, down to the well to be measured, stay for a certain period of time, hydrofluoric acid that is engraved on the glass bottle imprint, due to hydrofluoric acid and zinc sheet phase, the upcoming zinc sheet corrosion Through fluorocarbon acid solution along the rubber plug hole leak into the lower part of the protector, the glass bottle that line to dry, this time can be drilled, to be drilled to a certain back footage length, and then set the drill, therefore, can be reduced once Drill down time, which can improve the utilization of time, particularly effective in deep holes.