摘要：【中文】一种可复位仿形密封总成，属于油田井下工具技术领域，包括上背帽、上锥体、第一密封块、第二密封块、下锥体、锁簧、弹性压帽、提拉轴，所述上锥体上端与上背帽相连，下端插入到下锥体内腔，第一密封块与第二密封块径向错落排布在上锥体与下锥体之间，弹性压帽箍套在第一密封块与第二密封块外周，提拉轴置于到上锥体内。本发明密封没有胶件密封，坐封行程短，不会有胶筒掉入井中；全金属材料完成密封，适用高温、高压条件井况使用；而且由可溶、速钻材料加工的该密封总成，与电缆连接送入坐封，可满足快速的压裂施工需求。 【EN】The utility model provides a profile modeling seal assembly that can reset, belongs to oil field downhole tool technical field, including last back of the body cap, go up the cone, first sealed piece, second sealed piece, lower cone, lock spring, elasticity press the cap, carry and draw the axle, go up the cone upper end and link to each other with last back of the body cap, the lower extreme inserts lower cone inner chamber, and first sealed piece and second sealed piece are radially misplaced and are arranged between last cone and lower cone, and elasticity presses the cap hoop to overlap in first sealed piece and second sealed piece periphery, carries to draw the axle and arranges in last cone. The invention has no rubber sealing, short setting stroke and no rubber cylinder falling into the well; the sealing is completed by all metal materials, and the well sealing device is suitable for well conditions under high temperature and high pressure conditions; and the sealing assembly processed by the soluble and fast drilling material is connected with a cable and sent into a setting seal, so that the requirement of fast fracturing construction can be met.

摘要：【中文】本发明涉及一种基于低场核磁共振技术的卷烟保润性能评价方法。所述评价方法包括如下步骤：将两组烟丝样品进行平衡等处理后得两组待测烟丝样品；然后利用低场核磁共振技术测定两组烟丝样品的样品信号值，并根据反演信号，比较T₂₁的大小，T₂₁较小的烟丝样品保润性能优于T₂₁较高的烟丝样品。本发明利用低场核磁共振技术对卷烟保润性能进行评价，操作简便、耗时较短，可快速有效地达到保润性能评价的目的；并且具有无损检测的优点，避免了原料的浪费与污染，减少了开发过程中的物料损耗、降低研发成本、提高工作效率。 【EN】The invention relates to a cigarette moisture retention performance evaluation method based on a low-field nuclear magnetic resonance technology. The evaluation method comprises the following steps: balancing the two groups of tobacco shred samples to obtain two groups of tobacco shred samples to be detected; then, the low-field nuclear magnetic resonance technology is utilized to determine the sample signal values of the two groups of tobacco shred samples, and the T is compared according to the inversion signals₂₁Size of (D), T₂₁Smaller tobacco shred sample has better moisture retention performance than T₂₁Higher tobacco samples. The method utilizes the low-field nuclear magnetic resonance technology to evaluate the moisture retention performance of the cigarettes, is simple and convenient to operate, consumes short time, and can quickly and effectively achieve the purpose of evaluating the moisture retention performance; the nondestructive testing device has the advantages of nondestructive testing, avoids waste and pollution of raw materials, reduces material loss in the development process, reduces research and development cost and improves working efficiency.