CN2688878Y

CN2688878Y - Improved top sealer structure of polish rod

Info

Publication number: CN2688878Y
Application number: CN 200420047921
Authority: CN
Inventors: 安贤云
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-04-01
Filing date: 2004-04-01
Publication date: 2005-03-30
Anticipated expiration: 2014-04-01

Abstract

The utility model relates to a modified oil pumping polished rod well mouth seal structure. The model comprises an oil pumping polished rod, a seal rod packing case, a seal rod packing, a seal rod packing pressing cover and a seal rod packing pressing cap. The seal rod packing is a C-type drive belt. The cross-section of the drive belt is trapezoidal. The inner cavity of the upper of the seal rod packing case is the cylindrical inner cavity. The inner cavity of the lower of the seal rod packing case is the reducing type inner cavity. The cover wall of the seal rod packing pressing cover is longitudinally provided with a seal rod packing directional slot. The angle of inclination of the directional slot is 18 degree and the cross-section of the directional slot is trapezoidal. The lower of the seal rod packing case is provided with the reducing type inner cavity. The seal rod packing case is matched used with the seal rod packing pressing cover with the seal rod packing directional slot. The drive belt is rotated packed into or released from the seal rod packing case very conveniently. The model has the characteristic of the easy mounting. Because the triangular gap formed between the coiled drive belt can accumulate butter, the utility model has the better anti-dry grinding performance.

Description

Improved oil pumping polish rod well head hermetically-sealed construction

Technical field

The utility model relates to a kind of improved oil well hermetically-sealed construction, particularly a kind of improved oil pumping polish rod well head hermetically-sealed construction.

Background technology

At present, existing oil pumping polish rod well head hermetically-sealed construction, various different, the encapsulant of its use is a lot, have metal, rubber, graphite, injecting glue or the like, but all can not well solve well head leakage of oil problem, particularly to the producing well at intermittence, high water-cut well, neither one effective method especially, not only cause the pollution of environment, also influenced the oil production efficiency of pumpingh well.

The utility model content

The purpose of this utility model is to provide that a kind of abrasion resistance is good, cheap, the improved oil pumping polish rod well head hermetically-sealed construction of simple installation and long service life.

The purpose of this utility model is achieved in that a kind of improved oil pumping polish rod well head hermetically-sealed construction, comprise oil pumping polish rod, sealed packing box, sealed packing, sealed packing gland and sealed packing pressure cap, wherein sealed packing is that shape of cross section is trapezoidal C type driving-belt, sealed packing box top inner chamber is a cylindrical cavity, and the lower lumen of sealed packing box is tapering type inner chamber; The cross section that vertically is provided with inclination on the tegmental wall of sealed packing gland is trapezoidal sealed packing gathering sill.The gathering sill inclination range is between 10～25 degree, and best angle is 18 degree.

Because what the sealed packing in the utility model was used is C type driving-belt, be characterized in material be easy to get, cheap, and owing to be embedded with silk thread in the driving-belt, so have intensity height, characteristics that abrasion resistance is good with its sealed packing of making; And, sealed packing box bottom in the utility model has a tapering type inner chamber, itself and the sealed packing gland that has the sealed packing gathering sill use that cooperatively interacts, can easily the driving-belt rotating disc be gone into or discharge the sealed packing box, so the utlity model has the easy-to-install characteristics; In addition, owing to can accumulate a certain amount of lubricated butter of using among being coiled in the triangle slit that forms between the driving-belt that seals in the root tray salver, so the utlity model has good anti-dry grinding performance, long service life.

Description of drawings

Fig. 1 is a kind of internal construction schematic diagram with embodiment of the utility model.

Fig. 2 removes vertical view behind oil pumping polish rod and the driving-belt for Fig. 1.

Fig. 3 is that the A-A of Fig. 2 is to the sectional structure schematic diagram.

Fig. 4 is that the B-B of Fig. 2 is to the sectional structure schematic diagram.

Fig. 5 is the rear elevation of Fig. 2.

Fig. 6 has the sealed packing gland structure schematic diagram that cross section is trapezoidal gathering sill.

The specific embodiment

Below in conjunction with drawings and Examples the utility model is further described, a kind of improved oil pumping polish rod well head hermetically-sealed construction, comprise and take out polished rod 3, sealed packing box 9, sealed packing, sealed packing gland 4 and sealed packing pressure cap 5 that wherein sealed packing is that shape of cross section is trapezoidal C type driving-belt 2.As shown in Figure 1, when this driving-belt 2 gets up around oil pumping polish rod 3 coiling among sealed packing box 9, between two adjacent circle driving-belts 2, can form the slit 8 that cross section is triangular in shape, among this slit 8, can store the butter that is used to lubricate, so it has well anti-dry grinding performance, especially be suitable for and the producing well and high water-cut well at intermittence that dry grinding often takes place; The top inner chamber of sealed packing box 9 is a cylindrical cavity 7, and the lower lumen of sealed packing 9 is tapering type inner chamber 10; Tapering type inner chamber 10 and the oil pumping polish rod 3 that runs through wherein cooperatively interact and can easily an end that inserts driving-belt 2 wherein be clamped, thus can so that driving-belt 2 in sealed packing box 9 to the coiling of oil pumping polish rod 3 with hold tightly; On the tegmental wall of sealed packing gland 4, be vertically arranged with the sealed packing gathering sill 1 of inclination; The purpose that sealing gathering sill 1 is set is that the sealed packing of being convenient to have driving-belt 2 to make passes, and it enters or withdraw from sealed packing box 9, so driving-belt 2 closely can be coiled on the oil pumping polish rod 3 among sealing tray salver 9 in order by rotating it.

For driving-belt 2 can smooth and easyly be entered among the inner chamber of sealed packing box 9 in an orderly manner, and can not twist into fried dough twist, so the shape of cross section of sealed packing gathering sill 1 must be made the shape identical (see Fig. 2 1) with the cross section of driving-belt 2 because of driving-belt upset.

In order to reduce input resistance to greatest extent, the skewed slot inclination angle on the sealed packing gland is set in 18 degree (see figure 6)s simultaneously to driving-belt 2.

The effect of U-lag: in polishing bar clamp, the C type driving-belt 2 that exposes can be pressed in the U type groove, is unlikely to unloading.

As shown in Figure 1, assembly method of the present utility model is as follows:

A is fixedlyed connected sealed packing box 9 with wellhead assembly good;

B will be provided with the sealed packing pressure cap 5 of sealed packing gland 4 and the top of sealed packing box 9 is threaded togather;

C inserts an end of driving-belt 2 among the inner chamber of sealed packing box 9 by sealed packing gathering sill 1, and is clamped by the inwall of oil pumping polish rod 3 and sealed packing box 9 among making the tapering type inner chamber 10 of end in sealed packing box 9 of driving-belt 2;

D spanner rotatory sealing packing gland 4, driving-belt 2 is ceaselessly sent among the inner chamber of sealed packing box 9 by sealed packing gathering sill 1, and the driving-belt 2 of this moment can be coiled among the inner chamber of sealed packing box 9 on the oil pumping polish rod 3 under the guiding of the sealed packing gathering sill 1 that tilts in an orderly manner;

E pulls handle 6 and is rotated down sealed packing pressure cap 5 after the full driving-belt 2 of dish among the inner chamber of sealed packing box 9, drives sealed packing gland 4 downwards by it, the driving-belt 2 of coiling in the sealed packing box 9 is compressed get final product; Attention should leave sufficiently long driving-belt 2 in the outside, upper end of sealed packing gland 4, so that maintenance of the present utility model and dismounting.

Method for dismounting of the present utility model is opposite with assembly method of the present utility model.

Claims

1, a kind of improved oil pumping polish rod well head hermetically-sealed construction, comprise oil pumping polish rod (3), sealed packing box (9), sealed packing, seal disc gland (4) and sealed packing pressure cap (5), it is characterized in that: sealed packing is that shape of cross section is trapezoidal C type driving-belt (2), the top inner chamber of sealed packing box (9) is cylindrical cavity (7), and sealed packing box (9) lower lumen is tapering type inner chamber (10); On the tegmental wall of sealed packing gland (4), be vertically arranged with the sealed packing gathering sill (1) that 18 degree tilt.

2, a kind of improved oil pumping polish rod well head hermetically-sealed construction according to claim 1, it is characterized in that: the shape of cross section of sealed packing gathering sill (1) is identical with the shape of cross section of C type driving-belt (2).

3, a kind of improved oil pumping polish rod well head hermetically-sealed construction according to claim 1, it is characterized in that: the position corresponding with sealed packing gathering sill (1), the upper end of sealed packing gland (4) is provided with a U-lag (11).

4, a kind of improved oil pumping polish rod well head hermetically-sealed construction according to claim 1 is characterized in that: the gathering sill inclination range is between 10～25 degree, and best angle is 18 degree.