CN2099188U - Rod sealing and gush preventing device for oil pump-ing machine - Google Patents
Rod sealing and gush preventing device for oil pump-ing machine Download PDFInfo
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- CN2099188U CN2099188U CN 90225103 CN90225103U CN2099188U CN 2099188 U CN2099188 U CN 2099188U CN 90225103 CN90225103 CN 90225103 CN 90225103 U CN90225103 U CN 90225103U CN 2099188 U CN2099188 U CN 2099188U
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Abstract
The utility model provides a rod sealing and gush preventing device for an oil pumping machine, mainly comprising two parts of an upper half-body and a lower half-body. The utility model has three stages of sealing structures, and the first stage sealing packing plays sealing action to the circumferential clearance of the oil pumping rod when the oil pumping machine works; the second stage sealing plays temporary sealing action during replacing the first stage sealing packing when the oil pumping machine stops working; the third stage sealing is that a gush preventing sealing ball is driven by a petroleum stream with pressure to enhance and close a centre hole for the purpose of preventing petroleum with pressure from gushing out a well head after the rod of the oil pumping machine breaks and releases. The device is greatly simple and convenient for replacing the sealing packing and can conveniently adjust the eccentricity of the oil pumping rod relative with a christmas tree on the well head. The utility model simultaneously solves three important technical problems of well head sealing, centring and gush preventing of the oil pumping machine.
Description
The utility model relates to the special-purpose sealing device of oil-field oil pumper wellhead polish rod, particularly a kind ofly can seal and can rectify a deviation and the mechanical device of blowout prevention.
The sealing of oil-field oil pumper wellhead polish rod, correction and blowout prevention are three important technological problems.Though existing sealing device form of structure is varied, but majority has only sealing performance, fail to solve for the sealed packing eccentric wear problem that oil-extractor polish-rod off-centre causes, and the eccentric wear problem does not solve, and can have a strong impact on the application life of sealing effectiveness and sealed packing again.Though having of having seals and the dual performance of rectifying a deviation, its structure is complicated, and it is very inconvenient to change sealed packing.No. 85203837 patents for example adopt two rollers to set upright correction in the upper end to oil pumping polish rod is rigid, not only make the stressed and polished rod of sealing device laterally be subjected to reaction force very big, even can cause polished rod flexural deformation, increase to move back and forth resistance.No. 87207823 patents for example are to adopt upper and lower two body error-correction structures in the sealing device bottom again, and with O shape packing to the handing-over end face seal, though the correction effect is arranged, the structure more complicated is made difficulty, it is also not too convenient to operate.The more important thing is when oil pumping polish rod is disconnected for a certain reason take off after, main line back pressure petroleum streams will both have been wasted oil from the ejection of polished rod sealer centre bore, polluted the well site environment again.So far there is not a kind of sealing device can solve above-mentioned blowout prevention problem in the prior art.
The purpose of this utility model is at the prior art weak point, provides a kind of sealing performance better, and rectifying effect is better, and the oil pumper well head three function three-stage sealing devices of energy blowout prevention.
The purpose of this utility model is achieved through the following technical solutions.
This device mainly is made up of upper semi-body and lower semi-body two parts.Upper semi-body mainly comprises upper body shell, sealing shroud, pressure cap, goes up gland, primary seal packing, pad, sealing mat and handle; Lower semi-body mainly comprises lower body shell, following gland, secondary seal packing, valve seat and blowout prevention ball sealer; Upper semi-body and lower semi-body joint have 0 shape sealing ring and stop screw.
Each parts of upper semi-body are installed in the first half of upper body shell.Be primary seal packing and the pad that is mounted under the pressure cap pressure cap within the sealing shroud topmost.Between the inner chamber convex of the lower surface of sealing shroud and upper body shell is sealing mat.Sealing shroud circle is between primary seal packing and upper body shell.Handle is fixedly mounted on the middle part of shell outside, upper body.Adopt right-handed thread to connect between pressure cap and the upper body shell, the employing trapezoidal thread connects between sealing shroud and the upper body shell, can rotate for 1 to 3 week.
Each parts of lower semi-body also are installed in the first half of lower body shell.Gland under topmost being is secondary seal packing and valve seat under the following gland.Be downwards the bigger hypocoelom of diameter again, the blowout prevention ball sealer just places in the hypocoelom.Hypocoelom is big chamfering structure, is four covering of the fan through-hole structures below it, when oil pumping polish rod is disconnected suddenly take off after, the blowout prevention ball sealer had both moved up and down freely, was unlikely to again to drop out from below.
Upper semi-body is to connect all-in-one-piece by the left hand thread between the upper and lower body shell with lower semi-body.On the connection screw thread of upper and lower body shell, there are two stop screws to be installed on the shell of upper body, the twice O-ring seals is upwards arranged again.
The lower port internal diameter and the annular groove on the lower surface thereof of lower body shell are all concentric with the external diameter of lower port, but the central axis of lower port internal diameter and hypocoelom and this device but has 6 millimeters offset, adjust oil pumping polish rod for the off-centre of well head within the 3-6 millimeter with this frame mode, reach the correction purpose.
The utility model and prior art contrast its major advantage: both had excellent sealing performance, had reliable blowout prevention performance and convenient and practical deviation-correcting function again.Particularly its blowout prevention and the structure of rectifying a deviation are very simple novel, processing and manufacturing easily, and with low cost, application life is long again.Adopt this correction mode, oil pumping polish rod no longer is subjected to outer active force radially, also can not have a negative impact to well head inside.The seal member wearing and tearing of this device alleviate greatly, generally need not take apart and throw away the old and change into the new, and only need the pressure cap of upper end is continued to tighten some downwards or add new packing, and the primary seal packing can prevent to spill oil near oil pumping polish rod.Even stop production to overhaul is changed new packing, also very simple and convenient, especially only add or when changing the primary seal packing, the secondary seal packing can play the temporary sealing effect.This is an another distinctive feature of the present utility model.
Accompanying drawing 1 is that package assembly of the present utility model is partly cutd open schematic diagram, and accompanying drawing 2 is its bottom end face views, and accompanying drawing 3 is for changing the telescopic removal tool special that new packing designs.In the accompanying drawing, the 1st, pressure cap, 2 and 5 all is the primary seal packing, the 3rd, sealing shroud, the 4th, upper body shell, the 6th, pad, the 7th, handle, the 8th, O RunddichtringO, the 9th, stop screw, the 10th, blowout prevention ball sealer, the 11st, lower body shell, the 12nd, last gland, the 13rd, sealing mat, the 14th, following gland, the 15th, secondary seal packing, the 16th, valve seat, the 17th, oil pumping polish rod.
Details are as follows to embodiment of the present utility model in conjunction with the accompanying drawings.
Connect for right-handed thread between the pressure cap 1 of upper semi-body and the upper body shell.Between sealing shroud 3 and the upper body shell 4 for trapezoidal thread connects, 1 to 3 week of rotating range.Be matched in clearance between last gland 12 and sealing shroud 3 and the oil pumping polish rod 17.Be matched in clearance between pad 6 and the sealing shroud 3.Handle 7 is welded on the outside of upper body shell 4.Stop screw 9 is contained on the upper body shell 4.Adopt left hand thread to connect between upper body shell 4 and the lower body shell 11.Be matched in clearance between following gland 14 and valve seat 16 and the lower body shell 11, and between the oil pumping polish rod 17 certain interval arranged all.Blowout prevention ball sealer 10 was packed into from above before being unkitted valve seat 16 in the hypocoelom.The lower surface of lower body shell 11 connects with three general clip skins and the steel ring of well recovery tree.
Three grades of sealings of the present utility model and blowout prevention function are achieved in that the primary seal packing in the upper semi-body comprises two parts about in the of 2 and 5, when oil pumper is normally pumped operation, just make the band in the well head press oil to be unlikely to spill from the circumferential clearance of oil pumping polish rod 17 by this one-level sealing.The number of plies of packing 2 that wherein is contained in top is more, with wear-resistant, high temperature resistant, friction factor is little, the carbon fiber material braiding compacting that plastically deformable is bigger forms, its anti-wear performance is higher tens times than rubber, almost only need or not take out replacing from top the interpolation gradually, thereby significantly reduced the stop production to overhaul time, and polished rod frictional resistance load decreases also.The number of plies of packing 5 that wherein is contained in the bottom is less, makes with wear-resistance and oil-resistance rubber.Sealed packing 2 and 5 is annular, all is contained in the inside of sealing shroud 3.Packing 15 in the lower semi-body is a secondary seal, is contained in the upper end of lower body shell 11 inside.When oil pumper quit work replacing primary seal packing, secondary seal packing 15 can play the temporary sealing effect.The secondary seal packing adopts oil resistant rubber to make, and the packing 5 in its hardness ratio primary seal is soft slightly, and pressurization can reach excellent sealing.Three grades of sealings are blowout prevention ball sealer 10, after making unexpected disconnected the taking off of oil pumping polish rod for a certain reason, band is pressed oil will drive blowout prevention ball sealer 10 and is moved up, block the horn mouth of valve seat 16 lower ends, thereby prevent that this blowout prevention function also can be considered three grades of sealings with the centre bore ejection of pressing oil from this device.Blowout prevention ball sealer 10 can adopt nylon or other nonmetals to make.In addition, the place, mating face between upper body shell 4 and lower body shell 11 has adopted twice O shape sealed packing 8, to prevent when pumping operation because the deblocking band of secondary seal packing 15 presses oil to spill from this.Sealing mat 13 adopts nylon or other nonmetals to process, between the lower end that is installed in sealing shroud 3 and the inner chamber convex of upper body shell 4, with enhancing sealing herein.Because the seal approach of above-mentioned multistage many places is so the sealing performance of this device is best.
Change the primary seal packing if desired, at first inhour is rotated pressure cap 1, this moment, pressure cap wouldn't be as for shackle, but inhour drives 4 rotations of upper body shell earlier, make on its underpart and the left hand thread that lower body shell 11 combines and detain, upper body shell 4 is moved down, compression is gland 14 down, 14 recompression secondary seal packings 15, thus the circumferential clearance of oil pumping polish rod 17 is sealed up by packing 15 earlier.When packing 15 is compressed to a certain degree, or upper body shell 4 push up the outer convex place of lower body shell 11 bottom the time, if continue firmly counterclockwise rotation dynamic pressure cap 1 again, then pressure cap 1 can be unloaded.Take out then and go up gland 12, withdraw from trapezoidal thread with pipe wrench rotary seal cover 3 again, sealing shroud 3 is taken out with packing 2 and 5.Again with the socket wrench specially adapted for it instrument shown in the accompanying drawing 3 upper end withstand on pad 6 below, with the top that pipe wrench etc. knocks sealing shroud 3 downwards gently, the packing 2 and 5 in the sealing shroud can all eject, and is very easy and save labor.When packing new packing into, should put into earlier after the sealing shroud 3, put into new packing 5 and 2 more successively, put gland 12 again into.Overlap upper pressing cap 1 then and clockwise rotate pressure cap, just begun to hold handle 7 upper body shell 4 is not rotated thereupon, in order to avoid bottom left hand thread shackle and make the 15 too early deblocking leakage of oils of secondary temporary sealing packing.When pressure cap 1 clockwise rotates, and with the right-handed thread of upper body shell 4 on when being anchored to a certain degree, after last gland 12 has compressed primary seal packing 2 and 5, at this moment decontrol handle 7, and continue to clockwise rotate pressure cap 1, drive upper body shell 4 and clockwise rotate, make bottom left hand thread shackle, secondary seal packing 15 deblockings.Because the position-limiting action of stop screw 9, left hand thread can only be unloaded and is anchored to a certain degree, and secondary seal also can only arrive to a certain degree by deblocking.Because its internal diameter is identical with the internal diameter of valve seat 16 after secondary seal packing 15 deblockings, and and there is suitable gap between the polished rod 17, also because valve seat 16 usefulness stainless steels or the manufacturing of other material, so it is few that secondary seal packing 15 is subjected to the wearing and tearing of polished rod 17, the long-term use do not need to change yet.
Deviation-correcting function of the present utility model is achieved in that owing to the installation of well head production tree and oil pumper or other reason of down-hole, and cause oil pumping polish rod 17 with respect to the production tree radial deflection, its offset overwhelming majority is in 3-6 millimeter scope, can readjust oil pumper to this, handle 7 only need turn clockwise, drive this device integral body and rotate to an angle, just can make center of this device and polished rod 17 reach concentric, and be maintained fixed constant.Both avoided the rigid oil pumping polish rod of setting upright to produce the adverse consequences that radial reaction force causes, also unlike other deviation correction mechanism complicated operation so, thereby solved the eccentric wear problem of sealed packing effectively, further improved sealing performance and prolonged the sealed packing life-span.
Claims (4)
1, a kind of oil-field oil pumper polished rod that is used for can seal, and can rectify a deviation again and the mechanical device of blowout prevention, mainly is made of upper semi-body and lower semi-body two parts, it is characterized in that:
A, upper semi-body mainly comprise upper body shell, sealing shroud, pressure cap, go up gland, primary seal packing, pad, sealing mat and handle, lower semi-body mainly comprises lower body shell, following gland, secondary seal packing, valve seat and blowout prevention ball sealer, and upper semi-body and lower semi-body joint have 0 shape sealing ring and stop screw;
Each parts of B, upper semi-body are installed in the first half of upper body shell, be pressure cap topmost, be mounted in primary seal packing and pad within the sealing shroud under the pressure cap, between the inner chamber convex of the lower surface of sealing shroud and upper body shell is sealing mat, sealing shroud circle is between primary seal packing and upper body shell, and handle is fixedly mounted on the middle part of upper body shell outside, and the employing right-handed thread connects between pressure cap and the upper body shell, adopt trapezoidal thread to connect between sealing shroud and the upper body shell, can rotate for 1 to 3 week;
Each parts of C, lower semi-body also are installed in the first half of lower body shell, gland under topmost being, be secondary seal packing and valve seat under the following gland, be downwards the bigger hypocoelom of diameter again, the blowout prevention ball sealer just places in the hypocoelom, and hypocoelom is big chamfering structure, be four covering of the fan through-hole structures below it, after unexpected disconnected the taking off of oil pumping polish rod, the blowout prevention ball sealer had both moved up and down freely, was unlikely to again to drop out from below;
D, upper semi-body are to connect all-in-one-piece by the left hand thread between the upper and lower body shell with lower semi-body, have two stop screws to be installed on the shell of upper body on the connection screw thread top of upper and lower body shell, and twice 0 shape sealing ring is upwards arranged again;
The lower port internal diameter and the annular groove on the lower surface thereof of E, lower body shell are all concentric with the external diameter of lower port, but the central axis of lower port internal diameter and hypocoelom and this device but has 6 millimeters offset, adjust oil pumping polish rod for the off-centre of well head within the 3-6 millimeter with this frame mode, reach the purpose of correction.
2, oil-extractor polish-rod sealing according to claim 1 and blowout hookup, it is characterized in that being between gland and sealing shroud and the oil pumping polish rod matched in clearance, it between pad and the sealing shroud matched in clearance, be matched in clearance between following gland and valve seat and the lower body shell, and between the oil pumping polish rod certain interval arranged all.
3, oil-extractor polish-rod sealing according to claim 1 and blowout hookup, it is characterized in that the primary seal packing in the upper semi-body comprises upper and lower two parts, the top number of plies is more, form with carbon fiber material braiding compacting, the lower part number of plies is less, make with wear-resistance and oil-resistance rubber, the primary seal packing is annular, and sealing mat adopts nylon or other nonmetals to make.
4, oil-extractor polish-rod sealing according to claim 1 and blowout hookup, it is characterized in that the secondary seal packing in the lower semi-body adopts oil resistant rubber to make, the lower part packing of its hardness ratio primary seal is soft slightly, the blowout prevention ball sealer adopts nylon or other nonmetals to make, valve seat adopts stainless steel or other material to make, and its internal diameter is identical with the internal diameter of secondary seal packing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90225103 CN2099188U (en) | 1990-12-13 | 1990-12-13 | Rod sealing and gush preventing device for oil pump-ing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90225103 CN2099188U (en) | 1990-12-13 | 1990-12-13 | Rod sealing and gush preventing device for oil pump-ing machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2099188U true CN2099188U (en) | 1992-03-18 |
Family
ID=4902593
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 90225103 Withdrawn CN2099188U (en) | 1990-12-13 | 1990-12-13 | Rod sealing and gush preventing device for oil pump-ing machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2099188U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107237611A (en) * | 2017-07-24 | 2017-10-10 | 广东明珠流体机械有限公司 | HTHP oil well oil pump blowout prevention valve |
| CN116607908A (en) * | 2023-07-20 | 2023-08-18 | 北京汉诺威自控技术有限公司 | Polished rod structure |
-
1990
- 1990-12-13 CN CN 90225103 patent/CN2099188U/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107237611A (en) * | 2017-07-24 | 2017-10-10 | 广东明珠流体机械有限公司 | HTHP oil well oil pump blowout prevention valve |
| CN116607908A (en) * | 2023-07-20 | 2023-08-18 | 北京汉诺威自控技术有限公司 | Polished rod structure |
| CN116607908B (en) * | 2023-07-20 | 2023-09-29 | 北京汉诺威自控技术有限公司 | Polished rod structure |
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|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |