CN202451100U

CN202451100U - Well head sealer

Info

Publication number: CN202451100U
Application number: CN2012200638362U
Authority: CN
Inventors: 夏广林; 冀海波
Original assignee: DANDONG BELLOWS-SEALINGS Co Ltd
Current assignee: DANDONG BELLOWS-SEALINGS Co Ltd
Priority date: 2012-02-24
Filing date: 2012-02-24
Publication date: 2012-09-26
Anticipated expiration: 2022-02-24

Abstract

The utility model relates to devices for polish rod sealing of oil wells, in particular to a well head sealer. The well head sealer comprises a pressing cap, a filler packing assembly, a bearing base, a mechanical sealing device and a connector which are sequentially sleeved on a polish rod of an oil well from top to bottom, wherein the connector is installed on a well head, the bearing base is arranged above the connector, the lower end of the filler packing assembly is connected with the bearing base, and the upper end of the filler packing assembly is connected with the pressing cap. The mechanical sealing device is arranged between the bearing base and the connector and respectively in sealing connection with the bearing base and the connector. A self-aligning bearing is arranged on the bearing base, a positioning ring is arranged on the outer side of the core-adjusting bearing, a gap is reversed between the positioning ring and the core-adjusting bearing, and a limiting pressing cover for axial positioning is arranged above the core-adjusting bearing. The well head sealer is good in sealing effect and long in service life and reduces working load and cost.

Description

Wellhead sealing device

Technical field

The utility model relates to the device of oil well polished rod seal, and specifically a kind of wellhead sealing device is applicable to relative well head skew of polished rod and the oil well that tilts.

Background technology

According to the oilfield exploitation technological requirement, the existing pumping unit that adopts mainly contains: reciprocating beam-pumping unit and screw oil pumper, though reciprocating beam-pumping unit is replaced by the screw oil pumper at special operation condition, reciprocating beam-pumping unit remains main pumping unit.Reciprocating beam-pumping unit well head hermetically-sealed construction is various informative, ubiquity short problem sealing life, and be mainly reflected in: primary seal is prone to eccentric wear; It is poor to do operational effect; Seal moisture 90% above medium weak effect; Medium sand content Da Yi causes the polished rod wearing and tearing; The well head bit shift compensation quantity not sufficient that natural cause is caused; No auxiliary seal after primary seal lost efficacy.

The utility model content

To the problems referred to above, the purpose of the utility model is to provide a kind of wellhead sealing device.This wellhead sealing device good sealing effect, long service life reduces workload and cost.

To achieve these goals, the utility model adopts following technical scheme:

A kind of wellhead sealing device; Comprise the pressure cap, filler packing assembly, bearing support, mechanically-sealing apparatus and the connector that are set in successively from top to bottom on the oil well polished rod; Wherein connector is installed on the oil well mouth; Said bearing seat is in the top of connector, and the lower end of said filler packing assembly is connected with bearing support, the upper end links to each other with pressure cap; Said mechanically-sealing apparatus between bearing support and connector, and be tightly connected with bearing support and connector respectively; Said bearing support is provided with self-aligning bearing, and the said self-aligning bearing outside is provided with locating ring, leaves the gap between said locating ring and the self-aligning bearing, and said self-aligning bearing top is provided with the spacing gland of axial location.

Said mechanically-sealing apparatus comprises spring, throw-out collar, rotating ring, stationary ring and the stationary ring pad that sets gradually from top to bottom; Its medi-spring is a plurality of and is distributed on the top of throw-out collar; One end of each spring is connected in the spring eye on the said bearing support; The other end is connected on the throw-out collar, and rotating ring and said bearing support are tightly connected, and stationary ring and said connector are tightly connected.

Said filler packing assembly comprises stuffing-box body I, filler II, stuffing-box body II and filler III; Wherein the upper end of stuffing-box body I is connected with pressure cap; The lower end of stuffing-box body I is connected with the upper end of stuffing-box body II; The lower end of stuffing-box body II is connected with said bearing support, and said filler II and filler III are placed in respectively in stuffing-box body I and the stuffing-box body II.

Be provided with spacer ring between said filler II and the filler III, said spacer ring radially is provided with a plurality of oil filler points that between filler II, filler III and oil well polished rod, inject lubrication oil.

Be provided with between said stuffing-box body II and the bearing support between a plurality of sealing ring II and adjacent two the sealing ring II and be provided with dottle pin; Said a plurality of sealing ring II and dottle pin are through being set in the gland location on the bearing support; Said gland is contained in the interior lower end of stuffing-box body II and is connected with the inwall of stuffing-box body II, and the sidewall of said stuffing-box body II is provided with the through hole of rotatable gland.

The junction of said gland and bearing support and stuffing-box body II is equipped with the O RunddichtringO; Be provided with sealing ring I between the lower end of said filler III and the stuffing-box body II; The junction of said stuffing-box body I and stuffing-box body II is provided with the O RunddichtringO.

Said stuffing-box body I is interior, the top of filler II is provided with filler I.

Described filler I, filler II and filler III are frustum type.

The outer shroud of said self-aligning bearing is connected with guide ring, and this guide ring is between spacing gland and connector.

The top of said spacing gland is provided with the protective cover that is installed on the filler packing assembly.

The advantage and the beneficial effect of the utility model are:

1. the utility model is applicable to relative well head skew of polished rod and the oil well that tilts;

2. the utility model good sealing effect, long service life;

3. the utility model is changed simply, reduces workload and cost.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Wherein: 1 is pressure cap; 2 is filler I, and 3 is stuffing-box body I, and 4 is filler II, and 5 is spacer ring, and 6 is O RunddichtringO I, and 7 is sealing ring I; 8 is O RunddichtringO II, and 9 is sealing ring II, and 10 is dottle pin, and 11 is gland, and 12 is O RunddichtringO III, and 13 is stuffing-box body II; 14 is protective cover, and 15 is the recessed end holding screw of interior hexagonal, and 16 is hexagon-headed bolt, and 17 is hex nut, and 18 is spacing gland, and 19 is self-aligning roller bearing; 20 is spring, and 21 is rotating ring O RunddichtringO, and 22 is throw-out collar, and 23 is rotating ring, and 24 is stationary ring O RunddichtringO, and 25 is stationary ring; 26 is the stationary ring pad, and 27 is connector, and 28 is bearing support, and 29 is guide ring, and 30 is locating ring, and 31 is filler III.

The specific embodiment

Below in conjunction with accompanying drawing the utility model is done into description.

As shown in Figure 1; The utility model comprises pressure cap 1, filler packing assembly, bearing support 28, mechanically-sealing apparatus and the connector 27 that is set in successively from top to bottom on the oil well polished rod; Wherein connector 27 is installed on the oil well mouth; Bearing support 28 is positioned at the top of connector 27, and the lower end of said filler packing assembly is connected with bearing support 28, the upper end is threaded with pressure cap 1; Said mechanically-sealing apparatus is dissolved in the inner space of bearing support 28 and connector 27, is set on the oil well polished rod between bearing support 28 and the connector 27, also is tightly connected with bearing support 28 and connector 27 respectively; Bearing support 28 is provided with self-aligning bearing; Said self-aligning bearing adopts self-aligning roller bearing 19; The top of self-aligning roller bearing 19 is provided with the spacing gland 18 of axial location; The outer shroud of self-aligning roller bearing 19 is connected with guide ring 29, and two ends are respectively by spacing gland 18 and connector 27 location about in the of 29 for guide ring, and the outside of guide ring 29 is provided with locating ring 30; Leave the gap between this locating ring 30 and the self-aligning roller bearing 19, spacing gland 18, locating ring 30 and connector 27 through hexagon-headed bolt 16 connect, and through hex nut 17 lockings.The top of spacing gland 18 is provided with the protective cover 14 that is installed on the filler packing assembly.

Said mechanically-sealing apparatus comprises spring 20, throw-out collar 22, rotating ring 23, stationary ring 25 and the stationary ring pad 26 that sets gradually from top to bottom; Wherein stationary ring pad 26 is arranged in the inner space of connector 27; Stationary ring 25, rotating ring 23, throw-out collar 22 are stacked successively; Spring 20 is for a plurality of and be distributed on the top of throw-out collar 22, and the upper end of each spring 20 is connected in the spring eye of offering said bearing support 28 inner spaces, and the other end is connected to the upper surface of throw-out collar 22; Rotating ring 23 is tightly connected through rotating ring 0 RunddichtringO 21 with bearing support 28, and stationary ring 25 is tightly connected through stationary ring O RunddichtringO 24 with connector 27.The spring 20 effectively dynamic and static anchor ring of assurance mechanical seal is fitted always, and rotating ring 23 is closely contacted with stationary ring 25, does not have and leaks.

Said filler packing assembly comprises filler I2, filler II4, stuffing-box body I3, filler III31 and stuffing-box body II13; Wherein the upper end of stuffing-box body I3 is threaded with pressure cap 1; The lower end of stuffing-box body I3 is threaded with the upper end of stuffing-box body II13, and the junction of stuffing-box body I3 and stuffing-box body II13 is provided with O RunddichtringO I6.The lower end of stuffing-box body II13 is threaded with bearing support 28, also locatees through the recessed end holding screw 15 of interior hexagonal.Filler I2, filler II4 and filler III31 are frustum type; Filler III31 back taper is put into the inside of stuffing-box body II13 upper end; Filler II4 and filler the I2 order of positive cone, back taper are successively put into stuffing-box body I3; This filler inclined-plane and stuffing-box body inclined-plane are tightly locked, and improve the adhesion of sealing surface.Be provided with spacer ring 5 between filler II4 and the filler III31, spacer ring 5 radially is provided with a plurality of oil filler points that between filler II4, filler III31 and oil well polished rod, inject lubrication oil.The space that forms between the outside stuffing-box body I3 of spacer ring 5 and the stuffing-box body II13 is as oil storage tank, when screwing stuffing-box body I3, will inject lubrication oil in the filler packing assembly and be expressed in this oil storage tank and store, and avoids dry grinding.Stuffing-box body I3 is provided with the handle of being convenient to rotate.Be provided with sealing ring I7 between the lower end of filler III31 and the stuffing-box body II13, prevent that the impurity entering from making the excessive wear of filler packing assembly.The protective cover 14 that the top of spacing gland 18 is provided with is installed on the stuffing-box body II13.

Be provided with between stuffing-box body II13 and the bearing support 28 between a plurality of sealing ring II9 and adjacent two the sealing ring II9 of auxiliary seal effect and be provided with dottle pin 10; A plurality of sealing ring II9 and dottle pin 10 are through being set in gland 11 location on the bearing support 28; Gland 11 is contained in the inside of stuffing-box body II13 lower end and is connected with the inner thread of stuffing-box body II13, and gland 11 is respectively equipped with O RunddichtringO III12 and O RunddichtringO II8 with the junction of bearing support 28 and stuffing-box body II13.The sidewall of stuffing-box body II13 is provided with the through hole of rotatable gland 11, when change owner packing box root assembly more, in this through hole gland 11 is tightened, and changing finishes unclamps gland 11.

During the utility model operation; Along with the beat of oil well polished rod, mechanically-sealing apparatus, self-aligning bearing and filler packing assembly make main packing seal eccentric wear free jointly with oil well polished rod beat; And main filler packing assembly has added three road filler packing assemblies, has increased stability.The utility model compact conformation, convenient disassembly uses reliable and stablely, has solved the sealing problem of oil well polished rod beat.

Claims

1. wellhead sealing device; It is characterized in that: comprise the pressure cap (1), filler packing assembly, bearing support (28), mechanically-sealing apparatus and the connector (27) that are set in successively from top to bottom on the oil well polished rod; Wherein connector (27) is installed on the oil well mouth; Said bearing support (28) is positioned at the top of connector (27), and the lower end of said filler packing assembly is connected with bearing support (28), the upper end links to each other with pressure cap (1); Said mechanically-sealing apparatus is positioned between bearing support (28) and the connector (27), also is tightly connected with bearing support (28) and connector (27) respectively; Said bearing support (28) is provided with self-aligning bearing, and the said self-aligning bearing outside is provided with locating ring (30), leaves the gap between said locating ring (30) and the self-aligning bearing, and said self-aligning bearing top is provided with the spacing gland (18) of axial location.

2. by the described wellhead sealing device of claim 1; It is characterized in that: said mechanically-sealing apparatus comprises spring (20), throw-out collar (22), rotating ring (23), stationary ring (25) and the stationary ring pad (26) that sets gradually from top to bottom; Its medi-spring (20) is a plurality of and is distributed on the top of throw-out collar (22); One end of each spring (20) is connected in the spring eye on the said bearing support (28); The other end is connected on the throw-out collar (22), and rotating ring (23) is tightly connected with said bearing support (28), and stationary ring (25) is tightly connected with said connector (27).

3. by the described wellhead sealing device of claim 1; It is characterized in that: said filler packing assembly comprises stuffing-box body I (3), filler II (4), stuffing-box body II (13) and filler III (31); Wherein the upper end of stuffing-box body I (3) is connected with pressure cap (1); The lower end of stuffing-box body I (3) is connected with the upper end of stuffing-box body II (13); The lower end of stuffing-box body II (13) is connected with said bearing support (28), and said filler II (4) and filler III (31) are placed in respectively in stuffing-box body I (3) and the stuffing-box body II (13).

4. by the described wellhead sealing device of claim 3; It is characterized in that: be provided with spacer ring (5) between said filler II (4) and the filler III (31), said spacer ring (5) radially is provided with a plurality of oil filler points that between filler II (4), filler III (31) and oil well polished rod, inject lubrication oil.

5. by the described wellhead sealing device of claim 3; It is characterized in that: be provided with between said stuffing-box body II (13) and the bearing support (28) between a plurality of sealing ring II (9) and adjacent two the sealing ring II (9) and be provided with dottle pin (10); Said a plurality of sealing ring II (9) and dottle pin (10) are through being set in gland (11) location on the bearing support (28); Said gland (11) is contained in the interior lower end of stuffing-box body II (13) and is connected with the inwall of stuffing-box body II (13), and the sidewall of said stuffing-box body II (13) is provided with the through hole of rotatable gland (11).

6. by the described wellhead sealing device of claim 5, it is characterized in that: said gland (11) is equipped with the O RunddichtringO with the junction of bearing support (28) and stuffing-box body II (13); Be provided with sealing ring I (7) between the lower end of said filler III (31) and the stuffing-box body II (13); Said stuffing-box body I (3) is provided with the O RunddichtringO with the junction of stuffing-box body II (13).

7. by the described wellhead sealing device of claim 3, it is characterized in that: said stuffing-box body I (3) is interior, the top of filler II (4) is provided with filler I (2).

8. by the described wellhead sealing device of claim 7, it is characterized in that: described filler I (2), filler II (4) and filler III (31) are frustum type.

9. by the described wellhead sealing device of claim 1, it is characterized in that: the outer shroud of said self-aligning bearing is connected with guide ring (29), and this guide ring (29) is positioned between spacing gland (18) and the connector (27).

10. by the described wellhead sealing device of claim 1, it is characterized in that: the top of said spacing gland (18) is provided with the protective cover (14) that is installed on the filler packing assembly.