CN2540499Y

CN2540499Y - Well head sealing device

Info

Publication number: CN2540499Y
Application number: CN 02211238
Authority: CN
Inventors: 马卫东
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-04-15
Filing date: 2002-04-15
Publication date: 2003-03-19
Anticipated expiration: 2012-04-15

Abstract

A well sealing device relates to the structure improvement of sealing device of oil field machine, for resolving the problem of prior art which steel wire is hard to seal, while the utility model has better sealing property and easy detachment. The utility model is characterized in that a press claw of a lower sealing body is arranged on a rotary disc in a positioning ring of the lower sealing body, while the press claw is connected with a press claw in a groove of a middle sealing body, a transmission block outside the middle sealing element is connected with the press claw, the middle sealing element is arranged with a split sealing sheath and a return spring with magnetic sealing liquid, the press claw on the middle sealing element is connected with the press claw on the groove of the upper sealing body which is arranged with a split sealing sheath and a return sheath with magnetic sealing liquid, and a trisection rolling wheel aligning device is arranged between the upper sealing element and the cover cap.

Description

Wellhead sealing device

Technical field:

The utility model relates to the improvement of the sealer structure of oil field motor-pumped well mouth usefulness.

Background technology:

The sealer that present well head is used has multiple, most based on polished rod sealer, its shortcoming decentraction that is polished rod between the horse head of oil pumper is with well head, therefore, cause sealing ring circumference force in radial inequality, form ellipse gradually, and easily leak from the sealing generation of the longest point, the life-span of its sealer only is about three months; In addition, sealer is all-in-one-piece, and therefore, the mounting or dismounting sealer is very much inconvenience.

Occur again in the recent period replacing polished rod with wire rope, stroke can be brought up to 12 meters by original 4 meters, and oil production improves 4 times, and still, wire rope is difficult to sealing, does not still have the mature technology of this respect at present.

Summary of the invention:

The utility model is exactly to solve the problem that wire rope is difficult to seal, and a kind of good airproof performance, simple load and unload wellhead sealing device are provided.

The utility model adopts following technical scheme: the utility model comprises the lower seal body, its structural feature is that the paw of lower seal body is arranged on the rotating disc in the centring ring of lower seal body, the paw of lower seal body links to each other with the paw in the groove of intermediate seal body, the drive block of the external setting of intermediate seal links to each other with paw, is provided with split sealing shroud, back-moving spring with magnet fluid sealing liquid in the intermediate seal body; Paw on the groove of the same seal of paw of intermediate seal body links to each other, and is provided with split sealing shroud, back-moving spring with magnet fluid sealing liquid in the last seal, is provided with trisection roller aligning mechanism between last seal and the block.

The beneficial effects of the utility model:

1, good sealing effect:

Because be provided with magnet fluid sealing liquid in intermediate seal body of the present utility model, the last seal, magnet fluid sealing liquid just can closely encase the surface of polished rod or wire rope, plays sealing function well;

2, long service life:

Because the utility model is provided with trisection roller aligning mechanism, just can make polished rod or wire rope concentric motion in sealer, at this moment, the split sealing shroud is stressed evenly, thus the application life of having improved the sealing device;

3, easy to use:

Owing to be provided with the split sealing shroud in the seal of the present utility model, can under the situation of not dismantling polished rod or wire rope,, just can increase work efficiency greatly with regard to all parts of replaceable split sealing shroud; And be to install and remove seal fast with paw, replace existing spiral mounting or dismounting seal, it is extremely convenient to use.

Description of drawings:

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

1, the well head joint, 2, the lower seal body, 3, handle, 4, rotating disc, 5, paw, 6, centring ring, 7, stop collar, 8, trip bolt, 9, back-moving spring, 10, groove, 11, the split sealing shroud, 12, the intermediate seal body, 13, the magnet steel circle, 14, magnet fluid sealing liquid, 15, drive block, 16, pole plate, 17, liquid injecting mouth, 18, sealing ring, 19, last seal, 20, adjust bolt, 21, vertical rod, 22, fulcrum, 23, sliding bottom, 24, lever shaft, 25, lever, 26, trisection roller aligning mechanism, 27, roller, 28, roller shaft, 29, polished rod or wire rope, 30, block, 31, lock nut, 32, copper packing, 33, the guiding wear ring, 34, isolate copper sheathing.

Fig. 2 is the A-A sectional view of Fig. 1.

Fig. 3 is the B-B sectional view of Fig. 1;

35, body.

Fig. 4 is the C-C sectional view of Fig. 1.

Fig. 5 is the D-D sectional view of Fig. 1.

Fig. 6 is the E-E sectional view of Fig. 1.

Fig. 7 is the F-F sectional view of Fig. 1.

Fig. 8 is that the A of figure is to view.

The specific embodiment:

The utility model comprises lower seal body 2, the paw 5 of lower seal body 2 is arranged on the rotating disc 4 in the centring ring 6 of lower seal body 2, the paw 5 of lower seal body 2 links to each other with the paw in the groove 10 of intermediate seal body 12 5, the intermediate seal body 12 outer drive blocks 15 that are provided with link to each other with paw 5, are provided with split sealing shroud 11, back-moving spring 9 with magnet fluid sealing liquid 14 in the intermediate seal body 12; Paw 5 on the groove 10 of the paw 5 the same seals 19 of intermediate seal body 12 links to each other, be provided with split sealing shroud 11, back-moving spring 9 in the last seal 19, be provided with trisection roller aligning mechanism 26 between last seal 19 and the block 30 with magnet fluid sealing liquid 14.

Split sealing shroud 11 comprises the body 35 of two symmetries, two magnet steel circles 13 are set in the body 35, have magnet fluid sealing liquid 14 in the magnet steel circle 13, the top of magnet steel circle 13, below are respectively arranged with two pole plates 16 with liquid injecting mouth 17, two successively and isolate copper sheathing 34, two guiding wear rings 33, two copper packings 32, two lock nuts 31.

The upper and lower side of intermediate seal body 12 is respectively arranged with sealing ring 18.

Trisection roller aligning mechanism 26 comprises roller 27, roller shaft 28 is fixed on the lever 25 of lever shaft 24, the afterbody of the vertical rod 21 on the lever shaft 24 has the bolt 20 of adjustment, adjusts the fulcrum 22 that has vertical rod 21 on the sliding bottom 23 between bolt 20 and the lever shaft 24.

For paw 5 can be moved up and down along lower seal body 2, be outside equipped with trip bolt 8 at lower seal body 2, with the stop collar 7 outside this fixing press claw 5.

For remedying the loss of magnet fluid sealing liquid 14, can be provided with liquid injecting mouth 17 by pole plate 16.

Below in conjunction with figure a course of action of the present utility model is described:

At first, the utility model is placed the top of well head joint 1 by lower seal body 2, with after

intermediate seal body

12,19 assemblings of last seal, rotate the handle 3 on the rotating disc 4 successively again, seal 19, intermediate seal body 12, lower seal body 2 are combined closely together by paw 5; Meanwhile, back-moving spring 9 is compressed, polished rod or wire rope 29 firmly be fixed on the center line of split sealing shroud 11 by roller 27.

During certain part on the desire mounting or dismounting split sealing shroud 11, can be earlier by paw 5 counter motions, unclamp seal 19, intermediate seal body 12, at this moment, split sealing shroud 11 exposes out, with regard to replaceable its part; Then, will go up seal 19, intermediate seal body 12, lower seal body 2 by above-mentioned action again combines closely and gets final product together.

Claims

1, wellhead sealing device comprises lower seal body (2), the paw (5) that it is characterized in that lower seal body (2) is arranged on the rotating disc (4) in the centring ring (6) of lower seal body (2), the paw (5) of lower seal body (2) links to each other with the paw (5) in the groove (10) of intermediate seal body (12), the outer same paw of drive block (15) (5) that is provided with of intermediate seal body (12) links to each other, and is provided with split sealing shroud (11), back-moving spring (9) with magnet fluid sealing liquid (14) in the intermediate seal body (12); Paw (5) on the groove (10) of the same seal of paw (5) (19) of intermediate seal body (12) links to each other, be provided with split sealing shroud (11), back-moving spring (9) in the last seal (19), be provided with trisection roller aligning mechanism (26) between last seal (19) and the block (30) with magnet fluid sealing liquid (14).

2, wellhead sealing device according to claim 1, it is characterized in that split sealing shroud (11) comprises the body (35) of two symmetries, two magnet steel circles (13) are set in the body (35), have magnet fluid sealing liquid (14) in the magnet steel circle (13), the top of magnet steel circle (13), below are respectively arranged with two pole plates (16) with liquid injecting mouth (17), two isolation copper sheathings (34), two lead wear ring (33), two copper packings (32), two lock nuts (31) successively.

3, wellhead sealing device according to claim 1, it is characterized in that trisection roller aligning mechanism (26) comprises roller (27), roller shaft (28) is fixed on the lever (25) of lever shaft (24), the afterbody of the vertical rod (21) on the lever shaft (24) has adjustment bolt (20), adjusts the fulcrum (22) that has vertical rod (21) on the sliding bottom (23) between bolt (20) and the lever shaft (24).