一.绪言。世界性的能源紧张状况是众所周知的。为了满足需要,近年来油(气)井越采越深,因此,使用部门对油井管接手的要求也更加严格了。由于接手要承受套管、油管的悬垂载荷,因而对于接手特性的(不考虑油井的环境)最重要的要求是:它的强度应具有很高的可靠性。在目前油井管用接手中,API标准的梯形螺纹接手被认力是高效率的接手。这种接手使用部门已广为采用。本文的目的是阐明我公司生产的梯形螺纹接手的效率。二.实验方法。表1所示系供实验用的 I. Introduction. The world’s energy tensions are well known. In order to meet the demand, the oil and gas wells have been drilled deeper and deeper in recent years. Therefore, the requirements of the using department for taking over the oil well pipes have also become more stringent. The most important requirement for takeover characteristics (irrespective of the environment of the well) to take over the overhang load on the casing and tubing is that its strength should be of high reliability. In the current oil well handling, API standard trapezoidal thread takeover is considered to be an efficient takeover. This takeover department has been widely adopted. The purpose of this paper is to clarify the efficiency of the trapezoidal thread takeover produced by our company. Two. Experimental methods. Table 1 shows the Department for experimental use