CN204327027U - A kind of thick oil thermal extraction packing box - Google Patents
A kind of thick oil thermal extraction packing box Download PDFInfo
- Publication number
- CN204327027U CN204327027U CN201420666013.8U CN201420666013U CN204327027U CN 204327027 U CN204327027 U CN 204327027U CN 201420666013 U CN201420666013 U CN 201420666013U CN 204327027 U CN204327027 U CN 204327027U
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- China
- Prior art keywords
- packing box
- casing pipe
- packing
- sealed casing
- lower packing
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Abstract
The utility model discloses a kind of thick oil thermal extraction packing box.The seal section being in epimere and the cavity segment be in below seal section is provided with in lower packing box in this packing box, the chamber wall of cavity segment offers gas vent, gas vent is equipped with vent valve, and the Sealed casing pipe be in below gas vent is fixed with in the below of lower packing box, in Sealed casing pipe, guiding movement is equipped with sealing blocking along the vertical direction, and the outer peripheral face of sealing blocking and the internal face side face of Sealed casing pipe are sealed and matched.Bear the steam impringement of HTHP by lower packing and sealing blocking acting in conjunction when steam injection; the sealing effectiveness of lower packing is not only strengthened by sealing blocking; and serve protective effect when lower packing lost efficacy; thus the performance that when making steam injection, packing box bears HTHP greatly increases; and improve the period of validity of lower packing_seal; reduce the cycle of lower packing replacing, the problem that when avoiding steam injection, well head thorn leaks.
Description
Technical field
The utility model relates to a kind of thick oil thermal extraction packing box.
Background technology
Viscous crude is higher due to viscosity, so when heavy oil wells is exploited, usually needs to adopt note high-temperature steam to reduce viscosity of crude, improves the mobility of crude oil in shaft bottom, be convenient to crude oil and be plucked out of from oil pipe.The recovery process of thick oil thermal extraction is divided into multiple cycle usually, each cycle includes steam injection, stewing well, open flow, turns and take out four-stage, and for the heavy oil wells of well depth about 1000 meters or less than 1000 meters, usual same tubing string realizes adopting steam injection and oil recovery, reducing the activity duration, improves rate when recovering the oil.
At present, the sealing device that the wellhead sealing polished rod of thick oil thermal extraction adopts selects packing kit for thermal recovery usually, a kind of stuffing box of polish rod for thermal recovery disclosed in Chinese patent literature CN2071699U, this packing box adopts two-stage packing_seal, bottom is resistant to elevated temperatures graphite packing, add before steam injection, bear high-temperature steam effect in the steam injection stage; Top is rubber packing, turn take out before add, seal during oil recovery.But this packing box (350 DEG C at high temperature under high pressure, below 25MPa steam) when using, because graphite packing is not wear-resisting, stop-spraying turns that to take out rear wearing and tearing very fast, life-span is shorter, so change graphite packing before needing each steam injection, also need often to change rubber packing, add labour intensity, and due to the steam injection stage, packing box only relies on graphite packing to realize sealing, so often there is the problem that packing_seal lost efficacy, so that steam injection stage well head leaks vapour, stewing well in advance, do not reach injection allocation requirement, even cause gas blowout accident, make to occur well head leakage of oil when recovering the oil, contaminated environment.
Utility model content
The purpose of this utility model is to provide a kind of thick oil thermal extraction packing box, is intended to solve in prior art in the problem that the steam injection stage only relies on graphite packing to realize the sealing performance caused by sealing bad.
In order to realize above object, the technical solution of the utility model is as follows:
A kind of thick oil thermal extraction packing box, comprise for turn take out before load the upper packing of ability low pressure upper packing box and can the lower packing box of high voltage bearing lower packing for loading before steam injection, lower packing box releasable connection is in the below of upper packing box, be provided with in lower packing box and be in epimere and the seal section supplying lower packing to load and the cavity segment be in below seal section, the chamber wall of cavity segment offers the gas vent of releasing for well liquid, gas vent is equipped with the venting valve body for controlling gas vent switch, and the Sealed casing pipe be in below gas vent is fixed with in the below of lower packing box, the inner chamber of Sealed casing pipe is sealed up during on guiding movement is equipped with for being connected in polished rod lower end along the vertical direction in Sealed casing pipe and for carrying on polished rod, the sealing blocking of deviating from from the inner chamber of Sealed casing pipe when polished rod is transferred, the outer peripheral face of sealing blocking and the internal face side face of Sealed casing pipe are sealed and matched.
Sealing blocking is the metal plunger of upper downward-extension.
The upper end of sealing blocking offers the connecting screw hole of the lower end being connected to polished rod for coaxial threaded, and connecting screw hole is the blind hole of upper end open, lower end closed.
The upper end of Sealed casing pipe is inserted in the lower end of lower packing box, and the lower end inner wall face of lower packing box is provided with the limited step of block in Sealed casing pipe upper end.
Limited step has the sleeve pipe sheathing section of block in Sealed casing pipe upper end and the block blocking sheathing section above the peripheral edge portion of seal plug end face beyond the Great Wall, and sleeve pipe sheathing section is in the periphery of blocking sheathing section.
Part in lower packing box is stretched into for being threaded in the casing threads section of lower packing box lower end in the upper end of Sealed casing pipe.
Vent valve comprises the venting valve body be fixed on lower packing box, being provided with and extending and the valve pocket that is communicated with gas vent of import along lower packing box radial direction, the outlet of valve pocket having the venting for controlling opening and closing block in venting valve body.
Venting blocking is for being threaded in the plug in the outlet of valve pocket.
The counterbalance spring for compressing upper packing is downwards equipped with in upper packing box.
The seal section being in epimere and the cavity segment be in below seal section is provided with in lower packing box in the utility model, the chamber wall of cavity segment offers gas vent, gas vent is equipped with vent valve, and the Sealed casing pipe be in below gas vent is fixed with in the below of lower packing box, in Sealed casing pipe, guiding movement is equipped with sealing blocking along the vertical direction, and the outer peripheral face of sealing blocking and the internal face side face of Sealed casing pipe are sealed and matched.In use, before steam injection, on carry polished rod, make sealing blocking by the endoporus shutoff of Sealed casing pipe, and load lower wall root in lower packing box, to realize sealing by the acting in conjunction of lower packing and sealing blocking, simultaneously when opening vent valve, oily liquid in pipe is discharged by gas vent, then tightens venting blocking, blocking gas vent carries out steam injection; Turn take out before, transfer polished rod, be pushed out from Sealed casing pipe under making to seal the pushing tow being blocked in polished rod, and in upper packing box load on packing, now will be sealed polished rod by upper and lower packing acting in conjunction, spill well head to avoid crude oil liquid.Therefore the utility model bears the steam impringement of HTHP by lower packing and sealing blocking acting in conjunction when steam injection, graphite packing is only adopted to carry out the mode sealed compared to existing technology, the sealing effectiveness of lower packing is not only strengthened by sealing blocking, and serve protective effect when lower packing lost efficacy, thus solve in prior art in the problem that the steam injection stage only relies on graphite packing to realize the sealing performance caused by sealing bad, the performance that when making steam injection, packing box bears HTHP greatly increases, and improve the period of validity of lower packing_seal, reduce the cycle of lower packing replacing, the problem that when avoiding steam injection, well head thorn leaks.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of embodiment of the utility model.
In figure, 1, pressure cap; 2, counterbalance spring; 3, spring base; 4, gasket ring; 5, upper packing; 6, upper packing seat; 7, upper packing box; 8, packing gland; 9, lower packing; 10, lock nut; 11, lower packing seat; 12, lower packing box; 13, venting valve body; 14, venting blocking; 15, red copper pad; 16 Sealed casing pipes; 17, sealing blocking.
Detailed description of the invention
A kind of embodiment of thick oil thermal extraction packing box in the utility model: as shown in Figure 1, this thick oil thermal extraction packing box, is made up of low pressure packing_seal assembly, high pressure packing_seal assembly and the metal sealing assembly arranged successively from the top down.Low pressure packing_seal assembly comprises pressure cap 1, counterbalance spring 2, spring base 3, gasket ring 4, upper packing 5, upper packing seat 6, upper packing box 7; High pressure packing_seal assembly comprises packing gland 8, lower packing 9, lock nut 10, lower packing seat 11, lower packing box 12; Metal sealing assembly comprises Sealed casing pipe 16, sealing blocking 17, venting valve body 13, venting blocking 14, red copper pad 15.
In low pressure packing_seal assembly, pressure cap 1 coaxial threaded is connected to the top of packing box 7 and forms low pressure packing_seal chamber at the epimere of upper packing box 7, counterbalance spring 2, spring base 3, gasket ring 4, upper packing 5, upper packing seat 6 is equipped with from top to bottom successively in low pressure packing_seal chamber, upper packing seat 6 is spacing annular base body be assemblied in low pressure packing_seal chamber, upper packing 5 is pressed on upper packing seat 6 by counterbalance spring 2 by spring base 3 and gasket ring 4 top, is pushed up to make upper packing 5 the low pressure seal packing be contained in low pressure packing_seal chamber downwards by counterbalance spring 2.In high pressure packing_seal assembly, the bottom coaxial threaded of upper packing box 7 is connected to the top of lower packing box 12 and the high pressure packing_seal chamber that formed in the epimere being in lower wall root box 12, packing gland 8, lower packing 9, lower packing seat 11 is equipped with from top to bottom successively in high pressure packing_seal chamber, lower packing seat 11 is spacing to be assemblied in high pressure packing_seal section, lower packing 9 is pressed on the top of lower packing seat 11 by packing gland 8, is press-fited the high pressure sealing packing fitted in high pressure packing_seal chamber to make lower packing 9 by packing gland 8 top.Valve body 13 of exitting in metal sealing assembly is fixed on lower packing box 12, the import of valve pocket in venting valve body 13 is threaded on gas vent that lower packing box 12 is offered, gas vent is in the hypomere of lower packing box 12, the seal section being the lower packing loading of confession to make the epimere of lower packing box 12 inner chamber, hypomere are the cavity segment be communicated with gas vent, and the vent valve of formation control gas vent switch in the outlet that blocking 14 of exitting is threaded in venting valve body 13, venting blocking 14 is the plug of bolt shape; Sealing blocking 17 coaxial threaded is connected to the lower end of polished rod, and sealing blocking 17 along the vertical direction guiding movement is assemblied in Sealed casing pipe 16, and the internal face of Sealed casing pipe 16 and the outer peripheral face side face of sealing blocking 17 are sealed and matched.
Sealing blocking 17 is the metal plunger (plunger changes plunger into) of upper downward-extension.The upper end of sealing blocking 17 offers the connecting screw hole of the lower end being connected to polished rod for coaxial threaded, and connecting screw hole is the blind hole of upper end open, lower end closed.The upper end of Sealed casing pipe 16 is inserted in the lower end of lower packing box 12, and the lower end inner wall face of lower packing box 12 is provided with the limited step of block in Sealed casing pipe 16 upper end.Limited step has the sleeve pipe sheathing section of block in Sealed casing pipe 16 upper end and the blocking sheathing section of block above the peripheral edge portion of sealing blocking 17 upper surface, and sleeve pipe sheathing section is in the periphery of blocking sheathing section.Part in lower packing box 12 is stretched into for being threaded in the casing threads section of lower packing box 12 lower end in the upper end of Sealed casing pipe 16.
The use principle of a kind of thick oil thermal extraction of the present embodiment packing box is as follows:
Before steam injection, stop oil pumper, back out venting blocking 14, above carry polished rod, sealing blocking 17 is thereupon up, oil liquid in pipe is discharged by the valve pocket in venting valve body 13, sealing blocking 17 closely cooperates with Sealed casing pipe 16, tightens venting blocking 14, changes lower packing 9, tighten packing box 7, lock nut 10, during steam injection, high pressure packing_seal assembly and metal sealing are always shaped as two-stage and seal the HTHP jointly bearing steam;
Open flow terminates, and turns before taking out, turns on pressure cap 1, replace with packing 5, transfer polished rod, sealing blocking 17 is thrown off with Sealed casing pipe 16, and now low pressure seal packing and high pressure sealing packing all can play sealing function to polished rod, prevent fluid from spilling well head, contaminated environment.
Therefore the secondary seal that this thick oil thermal extraction packing box is always shaped as by high pressure packing_seal assembly and metal sealing when steam injection realizes sealing function, compared with the packing kit for thermal recovery of routine, many metal sealing assemblies, thus whole packing box is greatly improved in the performance that the steam injection stage bears HTHP.
Claims (9)
1. a thick oil thermal extraction packing box, comprise for turn take out before load packing upper packing box and for the lower packing box of packing under loading before steam injection, lower packing box releasable connection is in the below of upper packing box, it is characterized in that, be provided with in lower packing box and be in epimere and the seal section supplying lower packing to load and the cavity segment be in below seal section, the chamber wall of cavity segment offers the gas vent of releasing for well liquid, gas vent is equipped with the vent valve for controlling gas vent switch, and the Sealed casing pipe be in below gas vent is fixed with in the below of lower packing box, the inner chamber of Sealed casing pipe is sealed up when carrying on polished rod on guiding movement is equipped with for being connected in polished rod lower end along the vertical direction in Sealed casing pipe, the sealing blocking of deviating from from the inner chamber of Sealed casing pipe when polished rod is transferred, the outer peripheral face of sealing blocking and the internal face side face of Sealed casing pipe are sealed and matched.
2. thick oil thermal extraction packing box according to claim 1, is characterized in that, sealing blocking is the metal plunger of upper downward-extension.
3. thick oil thermal extraction packing box according to claim 2, is characterized in that, the upper end of sealing blocking offers the connecting screw hole of the lower end being connected to polished rod for coaxial threaded, and connecting screw hole is the blind hole of upper end open, lower end closed.
4. the thick oil thermal extraction packing box according to claim 1 or 2 or 3, is characterized in that, the upper end of Sealed casing pipe is inserted in the lower end of lower packing box, and the lower end inner wall face of lower packing box is provided with the limited step of block in Sealed casing pipe upper end.
5. thick oil thermal extraction packing box according to claim 4, it is characterized in that, limited step has the sleeve pipe sheathing section of block in Sealed casing pipe upper end and the block blocking sheathing section above the peripheral edge portion of seal plug end face beyond the Great Wall, and sleeve pipe sheathing section is in the periphery of blocking sheathing section.
6. thick oil thermal extraction packing box according to claim 4, is characterized in that, part in lower packing box is stretched into for being threaded in the casing threads section of lower packing box lower end in the upper end of Sealed casing pipe.
7. the thick oil thermal extraction packing box according to claim 1 or 2 or 3, it is characterized in that, vent valve comprises the valve body be fixed on lower packing box, be provided with in valve body and extend and the valve pocket that is communicated with gas vent of import along lower packing box radial direction, in the outlet of valve pocket, the removable venting be fixed with for controlling opening and closing blocks.
8. thick oil thermal extraction packing box according to claim 7, is characterized in that, venting blocking is for being threaded in the plug in the outlet of valve pocket.
9. the thick oil thermal extraction packing box according to claim 1 or 2 or 3, is characterized in that, is equipped with the counterbalance spring for compressing upper packing downwards in upper packing box.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420666013.8U CN204327027U (en) | 2014-11-10 | 2014-11-10 | A kind of thick oil thermal extraction packing box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420666013.8U CN204327027U (en) | 2014-11-10 | 2014-11-10 | A kind of thick oil thermal extraction packing box |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204327027U true CN204327027U (en) | 2015-05-13 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420666013.8U Expired - Fee Related CN204327027U (en) | 2014-11-10 | 2014-11-10 | A kind of thick oil thermal extraction packing box |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204327027U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106869850A (en) * | 2017-02-24 | 2017-06-20 | 加加力重钢江苏有限公司 | High-pressure polished rod sealer |
-
2014
- 2014-11-10 CN CN201420666013.8U patent/CN204327027U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106869850A (en) * | 2017-02-24 | 2017-06-20 | 加加力重钢江苏有限公司 | High-pressure polished rod sealer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150513 Termination date: 20191110 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |