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Automatic compensation type gapless well mouth sealing device

A technology of automatic compensation and sealing device, which is applied in sealing/isolation, wellbore/well parts, earthwork drilling and production, etc., to achieve good sealing performance, ensure continuous normal and safe production, and good sealing effect

Active Publication Date: 2015-11-25
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides an automatic compensation type gapless wellhead sealing device to solve the problem that the oil well cannot be continuously operated without packing in the working cycle

Method used

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  • Automatic compensation type gapless well mouth sealing device
  • Automatic compensation type gapless well mouth sealing device

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Embodiment Construction

[0024] In order to have a clearer understanding of the technical features, objects and effects of the present invention, the present invention will now be described with reference to the accompanying drawings.

[0025] like figure 1 As shown, the automatic compensation type gapless wellhead sealing device according to the embodiment of the present invention is used to seal the sucker rod 10, and the automatic compensation type gapless wellhead sealing device includes:

[0026] A plurality of first split-type seal rings 4 are layered from top to bottom to form a truncated cone or a tower-shaped sleeve on the sucker rod 10, and each first split-type seal ring is sleeved with a the first tightening spring 5, wherein the diameter of the lower first split-type sealing ring is larger than the diameter of the upper first split-type sealing ring;

[0027] The primary sealing box 2 has a conical inner side wall, and the inner side wall of the primary sealing box is consistent with the...

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Abstract

The invention provides an automatic compensation type gapless well mouth sealing device which comprises a plurality of first sectioned type sealing rings, a primary sealing box, a plurality of second sectioned type sealing rings, a secondary sealing box and a connecting body. The primary sealing box is provided with a conical inner side wall and arranged outside the first sectioned type sealing rings in a sleeving manner. The second sectioned type sealing rings are located below the first sectioned type sealing rings. The secondary sealing box is provided with an inverted-cone-shaped inner side which is matched with an inverted frustum formed by the second sectioned type sealing rings in shape. The second sectioned sealing rings are sleeved with the secondary sealing box. The primary sealing box and the secondary sealing box are sleeved with an outer ring of the connecting body. The automatic compensation type gapless well mouth sealing device is good in sealing performance, leakage, pollution and potential safety hazards are avoided, no components need to be replaced within the period, and continuous, normal and safe production of an oil well can be ensured.

Description

technical field [0001] The invention relates to the field of oil production, in particular to ground blowout prevention technology, in particular to an automatic compensation type gapless wellhead sealing device. Background technique [0002] At present, the method of adding packing is mainly used to seal the sucker rod on the oil production well. The sealing is not strict and the wellhead is leaked, which is a major problem affecting safety, environmental protection and production. Packing also delays production, especially for sand-producing wells. After the pumping is stopped, it is easy to cause sand sticking and stop production of oil wells. Serious need to work to release the card, increase operating costs, affect the production of oil wells. [0003] To sum up, the following problems exist in the prior art: at present, there is no way to make the oil well run continuously without adding packing during the working cycle. SUMMARY OF THE INVENTION [0004] The presen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B33/03
Inventor 徐立清徐祎擎贾财华李远进王硕胡畔朱文龙罗鹏张春凤权崇国王传良窦玉梅张玉增张英伟蔡德军肖家宏孙科孙向东
Owner PETROCHINA CO LTD
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