Downhole rod pipe fixing device

Abstract

The present invention discloses a fixing device for downhole rod and pipe, including first cylinder, second cylinder mounted in one end in the first cylinder and conical cylinder mounted in another end in the first cylinder. The described conical cylinder is made up by adopting the material whose hardness is less than at GFRP, and the internal surface of the conical hole of the first cylinder andthe external surface of the conical cylinder are identical in taper, so that they are tightly contacted. Between the described second cylinder and the described conical cylinder a washer is set, and the first cylinder and second cylinder are screw-connected between them, on the radial position of the first cylinder the screw is set, and on the walls of first cylinder, second cylinder, conical cylinder and washer the opening mechanisms are respectively set.

Description

technical field [0001] The invention relates to a downhole tool, in particular to a downhole fixing device. Background technique [0002] In the production well pipeline deepening fluid injection process string and capillary pressure measurement process string, it is often necessary to fix the capillary tube (or hydraulic control steel pipe) and the sucker rod together. [0003] Currently, the general product for securing the capillary to the sucker rod is a fixture called a throat clamp. The throat clamp device includes a clamping belt and a clamping mechanism; the clamping belt is similar to a belt, one end of which is fastened on the clamping mechanism, while the other end is a free end, and several parallel racks are arranged on the clamping belt Shaped convex structure; the tightening mechanism includes a screw rod, and one end of the screw rod is provided with a screwdriver port; the parts and components of the throat clamp device are all...

AI Technical Summary

Problems solved by technology

[0004] However, it has been found through use that the disadvantages of the above-mentioned throat clamp device are that (1) when the screwdriver is used to tighten the screw rod of the throat clamp mechanism, it is not easy to use force when turning the screwdriver; (2) the fixing of the throat clamp device is unstable, Throat clamps often slide along sucker rods and pilot lines without achieving a stable fixation

(3) All parts of the throat clamp device are made of ferrous metal, and the hardness of the ferrous metal is greater than that of fiberglass. When the throat clamp device is used to fix the sucker rod made of fiberglass, the sucker rod may be damaged Therefore, the hose clamp device can only be used to fix the sucker rod made of steel and the hydraulic control pipeline, but not the sucker rod made of fiberglass and the hydraulic control pipeline.

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