Slip clamping type sucker rod blowout preventer

Abstract

The invention provides a slip clamping type sucker rod blowout preventer which comprises a single-gate disc sucker rod blowout preventer and a slip locking assembly, wherein the single-gate disc sucker rod blowout preventer comprises a body and a single-gate disc assembly; and the slip locking assembly comprises slips, slip seats, slip locking shafts, slip lateral doors, slip locking screws, slip locking glands, locking bolts and limiting nuts. Slip cavities internally provided with the slips are symmetrically arranged on two sides of a main diameter of the body, the outer side of each slip cavity is sequentially provided with the clip lateral door and the slip locking gland, the slip locking shafts are arranged in working gaps remained on the outer sides of the slip lateral doors, the inner ends of the slip locking shafts are connected with the slips, the outer ends of the slip locking shafts are provided with limiting bosses; the inner ends of the slip locking screws are connected with the slip locking shafts, the outer edges of the slip locking screws are provided with the limiting nuts; and the plurality of locking bolts are arranged on the slip locking glands. The slip clamping type sucker rod blowout preventer has a reasonable structure and a remarkably-enhanced locking function on a sucker rod, and effectively prevents phenomena such as upward jumping, falling in a shaft bottom and leaking of the sucker rod from generating, thus safety and reliability of the blowout preventer are improved.

Description

technical field [0001] The invention belongs to the technical field of petroleum machinery, in particular to a slip-clamping sucker rod blowout preventer. Background technique [0002] In the operation and workover process of the pumping well, when the sucker rod is pulled out, well kick overflow, the sucker rod jumps out and hurts people, and even accidents such as blowout occur. In order to ensure the safety of construction personnel and equipment , usually using a sucker rod blowout preventer. However, the existing sucker rod blowout preventer is usually a single ram structure, and its clamping and sealing performance is limited. When the pressure in the well is high, the sucker rod will move up and down, and even fall into the well. Rods are time-consuming and labor-intensive, affecting production, and more importantly, low safety and reliability. At present, although there are also sucker rod blowout preventers with clamping mechanisms on the market, due to structural...

AI Technical Summary

Problems solved by technology

[0005] The above-mentioned slips are toothless slips with a smooth inner arc to solve the problem that the traditional toothed slips will cause damage to the surface of the sucker rod when locking the sucker rod, affect the blowout preventer to seal the wellhead, cause blowout and pollute the environment, etc. question

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