专利汇可以提供Wireline stuffing box and sheave专利检索,专利查询,专利分析的服务。并且A wire line stuffing box having sealing gland means therein which is normally in an undistorted non-sealing position spaced from the wire line extending through the stuffing box, and which is compressed into sealing engagement with the wire line by hydraulic fluid pressure applied to opposite sides of piston means which longitudinally compresses the sealing gland and is subject to well pressure in a well. Means is provided for controlling the application of pressure to the sealing gland elements of the packing gland to control the friction with which the wire line is engaged by the sealing gland and the sealing effect of the packing elements. In addition, a flexible line sheave is disclosed which is provided with an overrunning structure permitting movement of the sheave wheel after movement of the flexible line is stopped to prevent damage to the line by stretching, abrasion or overstressing due to the momentum of the movement of the sheave wheel when movement of the line is stopped.,下面是Wireline stuffing box and sheave专利的具体信息内容。
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