Abstract: A mounting bracket includes a bracket body, a locking assembly and support foot. The bracket body is configured for component installation. The locking assembly is arranged on the bracket body, and the support foot is arranged on the bracket body. The support foot is slide along the up and down direction of the bracket body, and the locking assembly is configured to lock the support foot at a preset position. Through the above structure, the support foot is installed on the ground and used to support the bracket body, and the locking assembly locks the support foot at a preset position to correspondingly adjust the height of the bracket body from the ground, so as to adjust the suspension height of the components installed on the bracket body.

Abstract: A cable head for petroleum logging includes a first connector and a second connector; there is a tension rod between the first connector and the second connector; a first piston, a second piston and a third piston are successively provided on the upper part, the middle part and the lower part of the first connector; the diameter of the second piston is greater than the diameters of the first and third piston respectively; the first and second piston are sealed and mounted inside a first cylinder; the third piston is sealed and mounted inside a second cylinder; the lower part of the second cylinder is fixedly connected with the second connector; a balance cavity is formed between the lower end face of the second piston and the upper end face of the second cylinder when the lower end face of the first cylinder is contacted with the upper end face of second cylinder; the balance cavity communicates with the external by a passage on the first or second cylinder; an axial projected area of the lower end face of th

Abstract: A cable head for petroleum logging includes a first connector and a second connector; there is a tension rod between the first connector and the second connector; a first piston, a second piston and a third piston are successively provided on the upper part, the middle part and the lower part of the first connector; the diameter of the second piston is greater than the diameters of the first and third piston respectively; the first and second piston are sealed and mounted inside a first cylinder; the third piston is sealed and mounted inside a second cylinder; the lower part of the second cylinder is fixedly connected with the second connector; a balance cavity is formed between the lower end face of the second piston and the upper end face of the second cylinder when the lower end face of the first cylinder is contacted with the upper end face of second cylinder; the balance cavity communicates with the external by a passage on the first or second cylinder; an axial projected area of the lower end face of th