| 丁腈橡胶衬套产品的寿命预测方法探讨 |
| Discussion on Life Prediction Method of Product with Nitrile Rubber Bushing |
| 投稿时间：2020-10-20 修订日期：2020-10-20 |
| DOI：10.12136/j.issn.1000-890X.2022.07.0527 |
| 中文关键词: 丁腈橡胶 衬套 定转子 发动机 螺杆钻具 配合尺寸 寿命 |
| 英文关键词: NBR bushing stator and rotor engine screw drill matching size life |
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| 中文摘要: |
| 以常规型号的油田钻井用螺杆钻具的发动机定子为例，结合丁腈橡胶（NBR）胶料的物理性能检测，初步建立定子NBR衬套的配合尺寸在时间效应下的变化模型，探讨在定转子的设计配合尺寸下发动机的寿命预测方法。结果表明：发动机定转子出厂前的配合尺寸直接影响其寿命；发动机定子NBR衬套的配合尺寸的主要影响因素有物理力、温升、介质、压变和磨耗；通过测定NBR胶料的物理物性，结合油田实际打井数据，可以预测在定转子的设计配合尺寸下发动机的寿命。 |
| 英文摘要: |
| Taking the engine stator of a conventional screw drill for oil field drilling as an example，combined with the physical property test of nitrile rubber（NBR） compound，a model of the change of the matching size of the NBR bushing of the stator under the effect of time was innitially established，and the life prediction method of engine under the design matching sizes of the stator and rotor was discussed.The results showed that the matching size of the engine stator and rotor before leaving the factor directly affected its life.The main factors influencing the matching size of the NBR bushing of the engine stator were physical force，temperature rise，medium，pressure change and wear. By measuring the physical properties of NBR compound and combined with the actual drilling data in the oilfield，the life of the engine under the design matching sizes of stator and rotor could be predicted. |
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