This device is a special tool for clamping drill pipe in mouse when making-up and breaking-out the drill pipe in drilling operations. The most obvious feature is its auto-adjustable clamping force. The clamping device is to conduct single connections by matching it with the kelly spinner, no need to pull rotary rope, which greatly reduces labor force and eliminates accidents. It is designed and manufactured according to API Spec 7K.
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Crown to Ground Oil Tools, Inc.