随着测井技术的发展,贴井壁测井仪器越来越多,对贴井壁装置即推靠器的要求也越来越高。岩性密度测井仪需用较高水平的推靠器,为此研制了岩性密度推靠器,型号定为89JT_1型。该仪器完成于1985年,和岩性密度测井仪配套使用性能良好。本文对仪器的基本原理、特点、用途和主要机构的设计作了介绍。 With the development of logging technology, more and more well-wall logging tools are attached to the wall, and the requirements for the wall-sticking device that is pumped by rockers are also getting higher and higher. Lithological density logging tools need to use a higher level of pusher, for which developed a rock density pusher, the model is set to 89JT_1 type. The instrument was completed in 1985, lithology and density logging tool supporting the use of good performance. This article describes the basic principles of the instrument, features, uses and design of the main body.