Metal seal assembly and tubing hanger
A tubing hanger, metal sealing technology, applied in sealing/packing, wellbore/well components, earth-moving drilling, etc., can solve problems such as hidden dangers of production safety, long service life of metal seals, production impact, etc., and achieve later use The effect of low cost, extended service life and easy disassembly
Active Publication Date: 2020-11-06
NEWAY OIL EQUIP SUZHOU
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Problems solved by technology
[0003] At present, most of the hangers on the wellhead are non-metallic seals, and the service life is not as long as that of metal seals. They cannot adapt to ultra-high temperature and ultra-high pressure working conditions, and there are hidden dangers in production safety. Non-metallic seals have a short service life and are prone to aging and leakage. Regular maintenance is required, the cost is high, the cycle is long, and it has a certain impact on production
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[0031] Preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.
[0032] see Figure 1-7 , a tubing hanger in this embodiment, comprising an upper flange 1, a tubing cross 3 located below the upper flange 1, a hanger 8 located inside the tubing cross 3 and a metal seal assembly, the hanger 8 and the upper flange A cavity 9 is formed between the flange 1 and the tubing spool 3, the metal seal assembly is located in the cavity 9 and the cavity 9 is divided into an inner cavity 91 near the side of the hanger 8 and an outer cavity 91 near the side of the tubing spool 3. Cavity 92 .
[0033] The metal seal assembly includes a sealing ring 7 and a sealing pressure ring 5 above the sealing ring 7. The sealing ring 7 is provided with a groove 71 matching the lower end of the sealing pressure ring 5. The lower end of the sealing pressure ring 5 is inserted into the concave In the groove 71 , a guide hole 51 is ope...
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The invention discloses a metal sealing assembly comprising a sealing ring and a sealing pressing ring located above the sealing ring. A groove matched with the lower end of the sealing pressing ringis formed in the sealing ring, the lower end of the sealing pressing ring is inserted into the groove, and a flow guiding hole is formed in the side wall of the sealing pressing ring. The metal sealing assembly can adapt to the ultra-high-temperature and ultra-high-pressure special wellhead work condition; low-pressure sealing and high-pressure self-sealing can be achieved, the life is long, maintaining is avoided, and the later-period using cost is low; the flow guiding hole is formed in the sealing pressing ring so as to prevent pressure from being kept down between the sealing pressing ringand the sealing ring, and the service life of the metal sealing assembly is prolonged; a stress relief groove is formed in the sealing pressing ring, and elastic sealing of the metal sealing component is indirectly improved; a convex part arranged on the upper portion of the outer side face of the sealing ring in a surrounded mode is arranged on a lip of the sealing pressing ring enables the sealing ring to be better attached to a hanger and an oil pipe four-way piece for sealing; and a dismounting hole is formed in the sealing ring, and dismounting is facilitated.
Description
technical field [0001] The invention relates to the technical field of petroleum drilling, in particular to a metal sealing component and a tubing hanger. Background technique [0002] A complete set of wellhead equipment is mainly composed of three parts: casing head, tubing head and oil (gas) tree. When drilling, the blowout preventer is installed on the casing head to form the drilling wellhead device; when the well is completed, the oil (gas) tree is installed above the tubing head to form the oil production (gas) wellhead device. Among them, the main function of the tubing head is to hang the tubing and seal the annular space between the tubing and the casing; the main function of the Christmas tree is to switch, control and guide the oil flow and hang the tubing; the function of the casing head is to connect the surface casing, Multiple layers of casing in a suspended well, the annular space between the casings. The whole device needs to meet the special operations o...
Claims
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IPC IPC(8): E21B33/04
CPCE21B33/04
Inventor 卜步建薄伟宗康成高开展
Owner NEWAY OIL EQUIP SUZHOU