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A slip type casing head

A casing head and slip-type technology, applied in the field of casing head, can solve problems such as complex design, achieve the effect of improving the grip effect, preventing slipping, and improving stability

Active Publication Date: 2020-07-28
DONGYING XIN HUALIAN PETROLEUM MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the structural design of the casing head for this well completion is complex, and it is mainly based on the collar-type casing head structure, which is highly targeted

Method used

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  • A slip type casing head
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specific Embodiment approach

[0064] It should be noted that the structures, proportions, sizes, etc. shown in the drawings attached to this specification are only used to match the content disclosed in the specification, for those who are familiar with this technology to understand and read, and are not used to limit the implementation of the present invention Any modification of structure, change of proportional relationship or adjustment of size shall fall within the range covered by the technical content disclosed in the present invention without affecting the effect and purpose of the present invention. within range.

[0065] At the same time, terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description and are not used to limit this specification. The practicable scope of the invention and the change or adjustment of its relative relationship shall also be regarded as the practicable scope of the present invention without...

Embodiment 1

[0067] combined with Figure 1-7 , a slip type casing head, comprising a body flange 1, a casing hanger 2 and an oil layer casing 3, the oil layer casing 3 is fixed in the casing hanger 2, and the casing hanger The casing hanger 2 is seated in the body flange 1. The casing hanger 2 includes slips 22 and a radial clamping device 26 arranged below the slips 22. The slips 22 are When pressing, together with the radial clamping device 26, the oil layer casing 3 is tightly clamped.

[0068] The cross-section of the radial clamping device 26 is a transverse V shape, including a first circular ring 261 and a second circular ring 262 connected obliquely to the outer ring wall, and the first circular ring 261 and the second circular ring 262 are integrated Shaped and symmetrical to each other at an angle of 30-90 degrees, the outer ring walls of the first ring 261 and the second ring 262 are against the inner wall of the casing hanger 2, the first ring 261 and the second ring 262 The...

Embodiment 2

[0090] combined with Figure 8 , the slip-type casing head in this embodiment is a further improvement on the radial clamping device 26 on the basis of the slip-type casing head in Embodiment 1. On the inner ring walls of the first ring 261 and the second ring 262 of the radial gripping device 26 in Embodiment 1, upwardly inclined protrusions 264 are provided. The outer wall of 3 is in direct contact, and the protrusion 264 is provided to increase the friction between the radial clamping device 26 and the oil layer casing 3, thereby increasing the holding force and preventing the oil layer casing 3 from slipping. The protrusion 264 is inclined upwards, which can generate more resistance when the oil layer casing 3 is pressed down, thereby preventing the oil layer casing 3 from sliding down.

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Abstract

The invention relates to the field of casing head technology, in particular to a slip type casing head, which includes a body flange, a casing hanger and an oil layer casing, the oil layer casing is fixedly arranged in the casing hanger, The casing hanger is seated in the body flange, and the casing hanger includes slips and a radial clamping device arranged below the slips. When the slips are pressed down, and the radial clamping device together clamp the oil layer casing. The slip-type casing head provided by the present invention realizes the double tightening of the oil layer casing by the radial gripping device and the slip teeth, prevents the slips from excessively sliding down and damages the oil layer casing, and improves the stability of the grip performance and safety, meanwhile, the present invention has excellent sealing effect and high installation efficiency.

Description

technical field [0001] The invention relates to the technical field of casing heads, in particular to a slip type casing head. Background technique [0002] Casing head, which is used to fix the wellhead of the drilled well, connect the wellhead casing string, support the gravity of technical casing and oil layer casing, seal the annular space between each layer of pipes, and install blowout preventers and tubing heads. , the Christmas tree provides a transition connection, and through the two side ports on the casing head body, construction operations such as re-squeeze mud, monitoring and filling of balance fluid can be carried out. [0003] The casing head is an important connection between the casing and the wellhead device. Its lower end is connected to the surface casing through threads, and its upper end is connected to the wellhead device or blowout preventer through a flange or a clamp. The connection between the casing and the casing head can be either a threaded ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B33/04
CPCE21B33/04E21B33/0422
Inventor 李振华赵张平张天保李妍慧李佃波孙荣华叶志富
Owner DONGYING XIN HUALIAN PETROLEUM MACHINERY
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