CN204457573U - Floating type blowout plug preventer - Google Patents

Floating type blowout plug preventer Download PDF

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Publication number
CN204457573U
CN204457573U CN201520079521.0U CN201520079521U CN204457573U CN 204457573 U CN204457573 U CN 204457573U CN 201520079521 U CN201520079521 U CN 201520079521U CN 204457573 U CN204457573 U CN 204457573U
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CN
China
Prior art keywords
preventer
ring
floating type
type blowout
blowout plug
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CN201520079521.0U
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Chinese (zh)
Inventor
胡兆麟
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胡兆麟
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Priority to CN201520079521.0U priority Critical patent/CN204457573U/en
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Abstract

Floating type blowout plug preventer, belongs to technical field of oil extraction equipment.Its formation comprises preventer lower body, be threaded in the lock nut on preventer lower body, be arranged on the anti-spray ring in preventer lower body, it is characterized in that being threaded a preventer upper body on described preventer lower body, the inner ring surface of the junction of preventer upper body and preventer lower body is provided with one can with on preventer upper body, the floating type blowout plug of lower motion, sealing ring is provided with between floating type blowout plug and the inner ring surface of preventer upper body and preventer lower body, a polished rod righting axle sleeve is respectively provided with at the inner ring surface of floating type blowout plug and preventer lower body lower end.Advantage is that anti-spray ring and polished rod are in non-model control state when normal oil pumping operation, reduces the load of oil pumper, energy conservation.Preventer in alternative existing oil pumping in oil fields well head device uses.

Description

Floating type blowout plug preventer
Technical field
The utility model relates to the preventer in oil pumping in oil fields well head device.Belong to technical field of oil extraction equipment.
Background technology
Preventer in current oil-pumping well head equipment has two kinds.One is rubber gate, and its key fitment is metal to-metal brake grillage and the rubber flashboard be arranged on metal to-metal brake grillage, utilizes extruding rubber flashboard to make it to be fitted in polished rod cylinder to realize sealing with blowout prevention.The extruding force of rubber flashboard is very large, once carelessness is not opened a sluice gate just to start oil pumper, rubber flashboard can be drawn badly and then pull polished rod to cause seal failure very soon.In addition, its bearing capacity is low, and elevated pressures oil well cannot use.Another kind is the preventer being called as " two-stage seal box ", and it forms and comprises primarily of sealer main body, is arranged on top seal part that joint ring in sealer main body forms and by being threaded in the blowout preventer body of sealer main body lower end, lock nut and being arranged on the blowout prevention part that the anti-spray ring in blowout preventer body forms.Its operating principle is that joint ring and anti-spray ring produce horizontal expansion when being subject to axial compression, fills polished rod and the gap between sealer main body and blowout preventer body reaches the object sealing blowout prevention.Its shortcoming is its bottom must remain at sealing duty as the anti-spray ring of " preventer ", and not so connection of thread will leakage of oil.Therefore polished rod works under remaining on high frictional resistance for a long time, causes oil pumper to pull the load of polished rod very large, also accelerates the wearing and tearing of polished rod and joint ring.
Summary of the invention
The purpose of this utility model is the above-mentioned shortcoming of the preventer overcome in existing oil-pumping well head equipment, provides a kind of floating type blowout plug preventer that can reduce the load of oil pumper and the wearing and tearing of polished rod and joint ring.
The formation realizing the floating type blowout plug preventer of the utility model object comprises preventer lower body, be threaded in the lock nut on preventer lower body, be arranged on the anti-spray ring in preventer lower body, it is characterized in that being threaded a preventer upper body on described preventer lower body, the inner ring surface of the junction of preventer upper body and preventer lower body is provided with one can with on preventer upper body, the floating type blowout plug of lower motion, sealing ring is provided with between floating type blowout plug and the inner ring surface of preventer upper body and preventer lower body, a polished rod righting axle sleeve is respectively provided with at the inner ring surface of floating type blowout plug and preventer lower body lower end.
During work, preventer upper body is connected with existing seal box.By two polished rod righting axle sleeve righting polished rods.While righting polished rod, also spacing effect is played to polished rod, make to possess certain gap between polished rod and anti-spray ring and be in non-model control state.Locking lock nut, now floating type blowout plug, anti-spray ring are in unpressurized suspension situation.The gap had between polished rod and anti-spray ring, the fluid be conducive in well is attached on polished rod, useful lubrication polished rod, reduces the frictional force between polished rod and righting axle sleeve.Between the inner ring surface being arranged on floating type blowout plug and preventer upper body and preventer lower body, seal ring seal has lived connecting thread between preventer upper body and preventer lower body, and OIH liquid is not leaked.Thus complete sealing.When needs seal pressure in well, the same with prior art, unclamp lock nut, rotation preventer upper body presses down floating type blowout plug makes it the anti-spray ring of descending compression, and anti-spray ring expanded radially seals up the gap between polished rod and preventer lower body.Reach the object of blowout prevention.
Compared with prior art, the utility model, by arranging polished rod righting axle sleeve and floating type blowout plug, makes anti-spray ring when normal oil pumping operation and polished rod is in non-model control state, reduces the frictional resistance between polished rod and anti-spray ring, thus reduce the load of oil pumper, energy conservation.Also reduce the wearing and tearing of polished rod and anti-spray ring simultaneously, extend its application life, reduce cost of production.
Below in conjunction with embodiment, the utility model is described further.
Accompanying drawing explanation
Fig. 1 structural representation of the present utility model
Detailed description of the invention
See Fig. 1, the formation of this floating type blowout plug preventer comprises preventer lower body 2, be threaded in the lock nut 4 on preventer lower body, be arranged on the anti-spray ring 3 in preventer lower body 2, feature of the present utility model is the preventer upper body 9 that has been threaded on described preventer lower body, the inner ring surface of the junction of preventer upper body 9 and preventer lower body 2 is provided with one can with on preventer upper body 9, the floating type blowout plug 5 of lower motion, sealing ring 6 is provided with between floating type blowout plug 5 and the inner ring surface of preventer upper body 9 and preventer lower body 2, the inner ring surface of floating type blowout plug 5 is provided with a polished rod righting axle sleeve 7, the inner ring surface of preventer lower body 2 lower end is provided with a polished rod righting axle sleeve 1.In figure, 8 is polished rod (shown in two-dot chain line), and 10 for being fixed in the turning handle of preventer upper body 9.Preventer upper body 9 can be set up one and drive floating type blowout plug and the descending step of polished rod righting axle sleeve to obtain in existing sealer main body.

Claims (1)

1. floating type blowout plug preventer, comprise preventer lower body, be threaded in the lock nut on preventer lower body, be arranged on the anti-spray ring in preventer lower body, it is characterized in that being threaded a preventer upper body on described preventer lower body, the inner ring surface of the junction of preventer upper body and preventer lower body is provided with one can with on preventer upper body, the floating type blowout plug of lower motion, sealing ring is provided with between floating type blowout plug and the inner ring surface of preventer upper body and preventer lower body, a polished rod righting axle sleeve is respectively provided with at the inner ring surface of floating type blowout plug and preventer lower body lower end.
CN201520079521.0U 2015-02-04 2015-02-04 Floating type blowout plug preventer Active CN204457573U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201520079521.0U CN204457573U (en) 2015-02-04 2015-02-04 Floating type blowout plug preventer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201520079521.0U CN204457573U (en) 2015-02-04 2015-02-04 Floating type blowout plug preventer

Publications (1)

Publication Number Publication Date
CN204457573U true CN204457573U (en) 2015-07-08

Family

ID=53664475

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201520079521.0U Active CN204457573U (en) 2015-02-04 2015-02-04 Floating type blowout plug preventer

Country Status (1)

Country Link
CN (1) CN204457573U (en)

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