Servo deviation adjustment rod sealing and hydraulic driving blowout preventing integrated device

Abstract

The invention provides a servo deviation adjustment rod sealing and hydraulic driving blowout preventing integrated device. The servo deviation adjustment rod sealing and hydraulic driving blowout preventing integrated device is applied to wellhead sealing and blowout prevention of oil and gas fields. The servo deviation adjustment rod sealing and hydraulic driving blowout preventing integrated device consists of a polish rod sealer, a servo deviation adjustor, a buckle blowout preventer, and a hydraulic driving force device, and the servo deviation adjustor performs radial servo slip deviation adjustment according to lateral eccentric force when a sucker rod and a wellhead tee are eccentric, self-compensates the offset between the polish rod sealer and the sucker rod, and form a three-stage non-metallic static seal with a double seal ring and the polish rod sealer according to an L-shaped seal ring; the polish rod sealer adopts a column long box body and forms a two-stage non-metallicdynamic seal with a rectangular seal ring and the sucker rod according to sealant injection packing; the hydraulic driving force device provides power and pushes the left buckle body and the right buckle body of the buckle blowout preventer to implement a radial precise buckle slip blowout preventing operation along a buckle passage of the blowout prevention body through a hydraulic driving rod of the hydraulic driving force device; and the buckle blowout preventer passes through a shell seal core and forms non-metallic static seal with the blowout prevention body, the left buckle body, and the right buckle body.

Description

technical field [0001] The invention relates to a wellhead polished rod sealing and blowout prevention device in the field of petroleum engineering, in particular to a polished rod seal and liquid drive blowout prevention integrated with radial follow-up sliding deviation adjustment and radial precision buckle slipping blowout prevention device. Background technique [0002] At present, most oil and gas wells in my country have entered the period of mechanical exploitation, and the exploitation of unconventional gas wells has also entered the stage of commercial exploitation. The equipment for exploitation of oil and gas wells and unconventional gas wells usually adopts organic Rod mining equipment, for rod mining equipment, the performance of the sucker rod seal and blowout preventer at the wellhead is directly related to the efficiency of the entire rod mining system and the production of oil and gas. [0003] The existing sucker rod sealing and blowout prevention technolo...

AI Technical Summary

Problems solved by technology

[0003] The existing sucker rod sealing and blowout prevention technologies at the wellhead of the rod mining system can be summarized as follows: 1) Conventional wellhead sealing device, the sealing packing is realized by the axial compression of the gland. It is simple and easy to operate, but its disadvantage is that it must be shut down when replacing the sealing packing, and there is no necessary adjustment mechanism

2) Improved wellhead sealing device, the pressure cap transmits its pressure to the gland through the thread, and compresses the sealing packing through the gland, and the sealing packing produces radial deformation to complete the sealing. When the sealing packing needs to be replaced, turn Adjust the screw to make the semicircular sealing ring press on the sucker rod. Compared with the conventional wellhead sealing device, this device increases the blowout prevention function, but its defect is that there is no necessary deviation adjustment mechanism and righting mechanism. The structure is complex, the cost of manufacturing is high, and two adjustment screw screws need to be rotated at the same time during construction, which increases the difficulty of operation for workers

3) A new type of wellhead sealing device, the upper gland compresses the conical sealing packing and causes radial deformation to achieve the purpose of sealing, and at the same time, the lower gland generates force on the rectangular packing to realize the blowout prevention function, but In the process of use, it is found that the shape and material selection of the sealing packing are unreasonable, the sealing effect of the sealing packing is not ideal, the installation and disassembly of the sealing packing are inconvenient, the design of the blowout prevention mechanism is relatively simple and the number of repeated operations Limited, the deflection adjustment mechanism cannot realize a wide range of follow-up centering operations, so the failure rate of the sealing packing is still high

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