| 摘要 |
A pipe clamping device, viz., pipe tongs, is shown which is particularly adapted to securing pipe as it is lowered into a pipe casing in the earth. The pipe tongs consist of a fixed handle with a removable pipe clamp at one end thereof and an adjustment screw at the other end, and a movable jaw member with a removable pipe clamp at one end thereof, a movable handle connected to the movable jaw member at one end and having a latch with an operating lever at the other end. A linkage is connected between the movable handle and the adjustment screw to provide an adjustable toggle or locking mechanism for the handles and movable jaw member of the tongs. A catch on the fixed handle is engaged by the latch to secure the movable handle in a locked, closed position. The removable pipe clamps are provided in a variety of sizes and shaped for accommodating different pipes. The pipe tong handles have projections beyond the point of support for the pipe clamps which provide means to support the tongs on a well casing and to support a wire or cable spaced from the wall of the well casing while lowering pipe into the casing.
|
