Mandrel type casing head and using method thereof

A casing head and mandrel technology, applied in the casing head field, can solve the problems of cumbersome handling, the ejection of the top wire to hurt people, and the failure to deliver to the position, so as to achieve high construction safety, avoid equipment wear, and improve service life. Effect

Active Publication Date: 2021-05-14
DONGYING XIN HUALIAN PETROLEUM MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Mandrel type casing hanger requires accurate position when hanging. If the hanger is not accurately seated in the casing head body, abnormal working conditions will occur, and the follow-up processing is cumbersome
The mandrel casing hanger is axially locked by the jackscrew assembly to prevent the axial movement of the hanger. However, in the actual application process, due to the interference factors such as the structure of the jackscrew assembly itself and the construction environment, often The phenomenon that the top wire is not fastened in place or not sent in place. When the top wire is not fastened in place, the axial locking of the hanger is not stable and it is easy to cause axial movement, and it will also cause the top wire to rush out and hurt people during the pressure test. Waiting for an accident
When unlocking the hanger and the casing head, if the top wire is not loose in place, the casing head will be easily worn out and scrapped, which will increase the production cost and cause blowout due to failure of sealing when shutting in the well

Method used

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  • Mandrel type casing head and using method thereof
  • Mandrel type casing head and using method thereof
  • Mandrel type casing head and using method thereof

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specific Embodiment approach

[0058] 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.

[0059] 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

[0061] combined with Figure 1-10 , this embodiment provides a mandrel type casing head, including a hollow casing head body 1 and a mandrel hanger 2 set in the casing head body 1,

[0062] The inner wall circumference of the casing head body 1 is provided with a card slot 1211,

[0063] The mandrel hanger 2 includes a hollow hanger body 21 and a casing 22 sleeved outside the hanger body 21 , and the hanger body 21 is provided with a snap-in piece corresponding to the slot 1211 23 and a rotating member 24 that drives the engaging member 23 to engage or leave the engaging slot 1211 , and the housing 22 is provided with a first through hole 2211 corresponding to the engaging slot 1211 .

[0064] During installation, the mandrel hanger 2 is lowered into the casing head body 1 for setting. When setting, align the first through hole 2211 on the casing 22 with the slot 1211 on the inner side wall of the casing head body 1. The rotating member 24 rotates, and the clamping member 23...

Embodiment 2

[0085] This embodiment is a modified example of Embodiment 1, such as Figure 11 to Figure 13 As shown, this embodiment provides another structure of the clip 23 to realize the locking and unlocking of the mandrel hanger 2 and the casing head body 1 , and the rest of the structure is the same as that of the first embodiment. The specific technical scheme is as follows:

[0086] Such as Figure 11 and Figure 12 As shown, the lower end surface of the slider 231 is axially provided with a first chute 2311, and the first chute 2311 is provided with the elastic member 233, and the elastic member 233 includes a first guide block extending axially. 2331 and a first spring 2332, one end of the first spring 2332 is connected to the top of the first chute 2311, and the other end is connected to the first guide block 2331, and the first chute 2311 can move along the first guide block 2331 slides axially; the lower end surface of the slider 231 away from the first chute 2311 is provid...

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Abstract

The invention relates to the technical field of casing heads, in particular to a mandrel type casing head and a using method thereof. The mandrel type casing head comprises a hollow casing head body and a mandrel hanger set in the casing head body, wherein a clamping groove is formed in the circumference of the inner side wall of the casing head body, the mandrel hanger comprises a hollow hanger body and a shell arranged on the outer side of the hanger body in a sleeve mode, a clamping piece corresponding to the clamping groove and a rotating piece driving the clamping piece to be clamped into or separated from the clamping groove are arranged in the hanger body, and a first through hole corresponding to the clamping groove is formed in the shell. According to the mandrel type casing head and the using method thereof, the mandrel type casing head is convenient to operate and high in construction safety, meanwhile, abrasion is reduced, and the service life of equipment is prolonged.

Description

technical field [0001] The invention relates to the technical field of casing heads, in particular to a mandrel type casing head and a usage method thereof. 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 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B33/04
CPCE21B33/04
Inventor 刘晖卢超张晓磊李振华
Owner DONGYING XIN HUALIAN PETROLEUM MACHINERY
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