2 Wedge-shaped tank channels shall be provided in the lifting derrick or well tower, and the end of the wedge-shaped tank road shall be provided with a windshield beam;
3 When the multi-rope friction is raised, the installation position of the wedge-shaped tank channel at the bottom of the well shall ensure that the downstream container is in contact with the wedge-shaped tank channel in advance, and the advance distance shall not be less than 1 m ;
4 When the single rope winding type is lifted, a simple buffer type anti-winding device shall be provided in the bottom hoisting section of the bottom hole, and a wedge-shaped tank path may be provided when conditions are met;
5 The wedge-shaped portion of the wedge-shaped tank shall have a slope of 1% , and its length shall include a wide-section straight section, which shall not be less than 2/3 of the over-roll height ;
The top of the wedge-shaped tank channel on the 6 well and the bottom of the wedge-shaped tank channel at the bottom of the well shall be provided with a head retaining beam.
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