1、油田旋转吊钩可应依据使用情况定期对吊钩进行检查，最长不超过1个月，有条件可做1.6倍静载实验。 1. The rotary hook of oil field can be inspected regularly according to the usage condition. The longest time does not exceed 1 months, and 1.6 times static loading experiment can be carried out under the condition. 2、在使用过程中，如发现油田旋转吊钩转动不灵活，应停止使用。 2, in the course of using, if the rotary hook is not flexible, it should be stopped. 3、发现吊具出现塑性变形，应停止使用，如油田旋转吊钩连接处变形。 3, found that the spreader plastic deformation, should be stopped, such as the oil rotary hook connection deformation. 4、吊装时其吊装物与吊具垂直夹角应小于45度。 4. The vertical angle between hoisting objects and lifting devices should be less than 45 degrees when lifting. 5、严禁超载使用，吊装前应认真计算吊装力，其综合拉力应不大于额定起重量。 5. No overload is strictly prohibited. The lifting force should be carefully calculated before lifting. The combined pull force should not exceed the rated load. 6、在额定起重量下使用上升速度不得超过30m/min，冲击负荷较大时应选用大一级的吊具。 6, the rated speed should not exceed 30m/min when the rated load is increased, and the sling should be used when the impact load is larger. 7、吊装时重物下严禁站人。 7. The heavy objects are strictly prohibited under the hoisting.