Tire type puncture-proof eccentric packing box

A technology of eccentric disk and packing box, which is applied in wellbore/well parts, earthwork drilling and production, sealing/isolation, etc. It can solve the problems of low utilization rate of packing, poor sealing effect, no elastic deformation, etc., and achieve structural simple effect

Inactive Publication Date: 2012-11-21
甄国卿
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of packing box has low packing utilization rate, frequent tight packing, and poor sealing effect.
In some wells with high water content and coal seam drainage and gas production wells, due to poor water lubrication, the polished rods severely wear the rubber packing, which greatly reduces the sealing effect of the packing box
Use other materials as packing, but it is difficult to achieve sealing without elastic deformation

Method used

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  • Tire type puncture-proof eccentric packing box

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Embodiment Construction

[0009] exist figure 1 Among them, the packing cavity (1) is mainly composed of a section of pipe, and a hole (17) is drilled on the outer wall of the pipe. The outside of the hole (17) is airtightly connected with a tire inflation nozzle (18), and the lower end has a bottom (2 ), forming a cavity (19) for accommodating the tire frame (6) and its tire (8) and packing (20), the middle part of the bottom (2) surface has a concave platform (5), and the lower middle part is connected with a Joint thin tube (3), the lower end of thin tube is connected with the middle plate (4) of eccentric flange again and is connected as a whole, and the hole that polished rod passes is arranged in the center. On the tube wall of the tubular tire frame (6) there is a tubular tire (8) made of oil-resistant rubber with air vents (7) in the middle, and the two ends of the tire (8) are sealing rings (9) which are turned outwards and placed on the tire. On the outer edge of frame (6) two ends, it is pa...

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PUM

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Abstract

The invention discloses a tire type puncture-proof eccentric packing box. The tire type puncture-proof eccentric packing box is formed by taking a packing cavity (1) as a main body; the outer wall of the packing cavity is provided with an aerating nozzle (18); a tire frame (6), a tire (8) and a packing (20) are arranged inside the cavity; an enclosed space is formed between the tire (8) and the inner wall of the packing cavity (1); the lower end of a thin pipe is connected integrally with a middle disk (4) of an eccentricity finding flange; a gland (10) and a pressure cap (12) are arranged above the tire (8) and the packing (20); and the pressure cap (12) and a set of puncture-proof packing box (16) are combined to construct a set of complete tire type puncture-proof eccentric packing box. When an inflation sleeve is used for inflating air into the cavity (19) and the enclosed space of the tire (8) through the aerating nozzle (18), the tire (8) wall plumps up towards the center through a vent hole (7) in the tire frame (6) along with the increase of the air amount, centering transverse pressure is applied to the packing (20), and the packing (20) is driven to clamp a polished rod tightly, so that the aim of sealing is fulfilled.

Description

Technical field [0001] The invention relates to a packing box of an oil pumping well production tree. Background technique [0002] At present, most of the known packing boxes use oil-resistant rubber as the packing, and the rubber packing is squeezed longitudinally to cause elastic deformation and hold the polished rod tightly to achieve the sealing effect. This kind of packing box has low packing utilization rate, frequent tight packing, and poor sealing effect. In some high water content wells and coal seam drainage gas production wells, due to the poor lubrication of water, the polished rods severely wear the rubber packing, which greatly reduces the sealing effect of the packing box. It is difficult to achieve sealing without elastic deformation by using other materials as packing. Contents of the invention [0003] In order to overcome the deficiencies of the existing packing boxes, the present invention provides a tire-type stab-proof eccentric packing box, which ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B33/03
Inventor 甄国卿
Owner 甄国卿
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