CN205445530U - Can drop into formula of returning out well head protector - Google Patents
Can drop into formula of returning out well head protector Download PDFInfo
- Publication number
- CN205445530U CN205445530U CN201521104125.5U CN201521104125U CN205445530U CN 205445530 U CN205445530 U CN 205445530U CN 201521104125 U CN201521104125 U CN 201521104125U CN 205445530 U CN205445530 U CN 205445530U
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- CN
- China
- Prior art keywords
- isolated tube
- urceolus
- thick cyclinder
- packing element
- tree protector
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model discloses a can drop into formula of returning out well head protector by keeping apart pipe, trapper and preventing spouting the nipple joint and constitute, installs in the production tree upper end through connecting the nipple joint during use, avoids the wellhead assembly corroded by the erosion of sand liquid, acidizing fluid and reduce the high pressure effect, carries out the insulation blocking to the wellhead assembly, open the isolation valve during fracturing, it is down to predetermined operating position and make and seal up between packing element expansion and the oil pipe to keep apart the pipe, utilizing the pressure in the well to make the isolation pipe rush out the well head after the fracturing, utilizing the trapper to catch, outside energy don't be used to whole working process to other auxiliary assembly have been reduced, the cost is reduced, it is applicable in the fracturing operation of different grade type through changing not unidimensional flow controller. And the utility model discloses simple structure, the lower simple to operate of mounting height.
Description
[technical field]
This utility model relates to the wellhead assembly protector of a kind of acidification of oil field pressure break, is specifically related to one and can put into and return out formula tree protector.
[background technology]
Along with deeply developing of oil field, fracturing technology and technology have been used widely, owing to the tubing string of pressure break direct plunges into production, if carrying out operation with the mouth device of the relatively low well of pressure rank during fracturing work, then wellhead assembly may be caused certain erosion, corrosion damage, produce the danger that high pressure is revealed, if with the higher wellhead assembly of pressure rank, the daily production in later stage can cause the surplus of capacity of equipment.And wellhead assembly can be played buffer action by tree protector; during fracturing work, fracturing fluid requires no wellhead assembly and directly enters in well by tree protector; the problems referred to above can be efficiently solved, so fracturing technology is had great importance by the research of tree protector.
Up to the present, about the existing multinomial patent disclosure of research of tree protector, and having been put into of having uses.These several protectors are essentially all pressured difference and realize sealing and the sealing tubing string that hoists; but implementation is the most different; Sichuan Province's Weir honest Chemical Co., Ltd. application in such as 2015 obtains " tree protector of a kind of oil-gas field development " patent; the patent No.: 201420627276.8; this is the up-to-date patent about tree protector; it is similar to that hydraulic cylinder, realizes sealing decline and the rising of tubing string by hydraulic cylinder, and uses mechanical system to set.
Owing to this protector is both needed to by outer liquid pressure to complete work, thus need to increase other auxiliary equipments such as Hydraulic Station, i.e. add operation and cost of equipment.
[utility model content]
The purpose of this utility model is that providing a kind of returns out formula tree protector by hydraulic fluid self-sealing and putting into of isolated tube of lifting, solves the problem that wellhead assembly carries out in fracturing process insulation blocking, and decreases the input of auxiliary equipment.
To achieve these goals, this utility model adopts the following technical scheme that
One can put into returns out formula tree protector, including catcher, thick cyclinder, separation valve door, connecting short section, isolated tube, packing element and reducer；Described thick cyclinder upper end is closed by plug, and catcher is fixed on bottom plug and is placed in thick cyclinder, and connecting short section is connected to thick cyclinder lower end；Isolated tube is placed in thick cyclinder and freely up and down can move in thick cyclinder, hollow isolated tube upper end outer wall is the conical surface and convex shoulder structure, described connecting short section upper end inwall is also taper surface, also and realizing between isolated tube sealing for hanging isolated tube, isolated tube lower end connects packing element and reducer；Separation valve door is arranged on thick cyclinder, and isolated tube is closed in thick cyclinder by separation valve door；Tree protector is arranged on production tree upper end by connecting short section, opens separation valve door during pressure break, and isolated tube leans on gravity fall one segment distance, then makes isolated tube go downwards to predetermined work position and make packing element expand sealing between oil pipe by upper and lower pressure reduction；Pressure break utilizes the pressure in well to make isolated tube go out well head after terminating, utilize catcher to catch.
Further, described catcher is made up of urceolus, voussoir and steel ball；Urceolus is welded on plug, the voussoir of pyramidal structure is fixed in urceolus, three arc-shaped slots are had equably in voussoir circumference, position corresponding with voussoir arc-shaped slot on urceolus has breach, and the width of breach is slightly less than the diameter of steel ball, and steel ball can move up and down in being placed in three arc-shaped slots in groove, when steel ball is in bottom, steel ball some be exposed at outside urceolus, when in the top, steel ball is completely in urceolus.
Further, connecting there is inverted cone anti-bias piece bottom described urceolus, anti-bias piece of lower end is drilled with handling hole.
Further, one section of cylinder is arranged at described voussoir top, has blind hole, fixed voussoir upper end in the blind hole of cylinder insertion urceolus bottom urceolus.
Further, connecting and have blowout prevention nipple between described thick cyclinder and connecting short section, plug, by blowout prevention nipple upper end closed, blowout prevention nipple connects and has lubricator, lubricator is provided with open flow valve.
Further, described isolated tube lower end is sequentially connected with top connection, central canal and lower contact, and packing element is enclosed within central canal to be fixed by top connection and lower contact, and central canal circumference has gap, and liquid enters in packing element by gap, and reducer is arranged in lower contact.
Further, all use between described isolated tube, top connection, central canal, packing element, lower contact and reducer threaded.
Further, between described blowout prevention nipple and thick cyclinder, between thick cyclinder and separation valve door, tubing thread is all used to be connected.
Further, the described isolated tube upper end conical surface and convex shoulder are respectively provided with two O RunddichtringOs.
Further, equipped with two O RunddichtringOs on described reducer.
Of the present utility model input is returned out formula tree protector and is made up of catcher, thick cyclinder, separation valve door, connecting short section, isolated tube, packing element and reducer; it is arranged on production tree upper end by connecting short section during use; avoid wellhead assembly by sand liquid erosion, acid liquid corrosion and reduction high pressure effect, wellhead assembly is carried out insulation blocking；Opening separation valve door during pressure break, isolated tube goes downwards to predetermined work position and makes to seal between packing element expansion and oil pipe；Pressure break utilizes the pressure in well to make isolated tube go out well head after terminating, utilize catcher to catch, and whole work process does not use external energy, thus decreases other auxiliary equipments, reduces cost；It is applicable to different types of fracturing work by changing various sizes of reducer.And this utility model simple in construction, setting height(from bottom) is relatively low easy for installation.
Further, catcher uses the principle of friction self-locking, internal equipped with 3 steel balls, above voussoir, circumference has arc groove equably, it is ensured that steel ball moves up and down in this groove, and breach has been opened in position corresponding with wedge groove on urceolus, gap width is slightly less than the diameter of steel ball, it is ensured that steel ball will not drop out.After pressure break terminates, isolated tube is caught when being gone out oil recovery (gas) tree by highly pressurised liquid by isolated tube.
Further, the lower end of catcher is also equipped with one anti-bias piece, when isolated tube is rushed out from well it cannot be guaranteed that vertically rise, it is possible to occur the top of isolated tube and the bottom of catcher that the situation of dislocation occurs, have impact on seizure, the anti-bias piece of centering realizing isolated tube and catcher.
[accompanying drawing explanation]
Fig. 1 is structural representation of the present utility model
Fig. 2 is the partial enlarged drawing of catcher
Fig. 3 is the top view of voussoir in catcher
Fig. 4 is the structural representation of isolated tube
In figure: 1-catcher, 1.1-plug, 1.2-urceolus, 1.3-voussoir, 1.4-steel ball, anti-bias piece of 1.5-, 1.6-handling hole, 2-blowout prevention nipple, 3-box cupling, 4-thick cyclinder, 5-lubricator, 6-open flow valve, 8-separation valve door, 9-sealing ring, 11-connecting short section, 12-isolated tube, 13-top connection, 14-central canal, 15-packing element, 16-lower contact, 17-reducer.
[detailed description of the invention]
Below in conjunction with the accompanying drawings this utility model is described in further detail:
Refering to Fig. 1 and Fig. 4; this utility model is a kind of protector being operated by the energy of self in hydraulic fluid or well, is mainly made up of catcher 1, blowout prevention nipple 2, thick cyclinder 4, open flow valve 6, separation valve door 8, connecting short section 11, isolated tube 12, top connection 13, central canal 14, packing element 15, lower contact 16 and reducer 17.
Thick cyclinder 4 upper end is closed by plug 1.1, and catcher 1 is fixed on bottom plug 1.1 and is placed in thick cyclinder 4, and connecting short section 11 is connected to thick cyclinder 4 lower end；Isolated tube 12 is placed in thick cyclinder 4 and freely up and down can move in thick cyclinder 4, hollow isolated tube 12 upper end outer wall is the conical surface and convex shoulder structure, described connecting short section 11 upper end inwall is also taper surface, also and realizing between isolated tube 12 sealing for hanging isolated tube 12, isolated tube 12 lower end connects packing element 15 and reducer 17；Separation valve door 8 is arranged on thick cyclinder 4, and isolated tube 12 is closed in thick cyclinder 4 by separation valve door 8.
Before pressure break, by connecting short section 11, this protector being arranged on oil recovery (gas) tree upper end, isolated tube 12 is closed in thick cyclinder 4 by separation valve door 8；During pressure break, opening separation valve door 8, isolated tube 12 can lean on gravity fall one segment distance, then makes isolated tube 12 go downwards to predetermined work position and make packing element 15 expansion seal by upper and lower pressure reduction；After pressure break terminates, utilize the pressure in well to make isolated tube go out well head, utilize catcher 1 to catch.
For solving open flow problem, connecting and have blowout prevention nipple 2 between thick cyclinder 4 and connecting short section 11, plug 1.1, by blowout prevention nipple 2 upper end closed, blowout prevention nipple 2 connects and has lubricator 5, lubricator 5 is provided with open flow valve 6.Connecting between described thick cyclinder 4 and connecting short section 11 and have blowout prevention nipple 2, plug 1.1, by blowout prevention nipple 2 upper end closed, blowout prevention nipple 2 connects and has lubricator 5, lubricator 5 is provided with open flow valve 6.
As shown in Figures 2 and 3, catcher 1 uses the principle of friction self-locking, and catcher 1 is made up of urceolus 1.2, voussoir 1.3 and steel ball 1.4；Urceolus 1.2 is welded on plug 1.1, the voussoir 1.3 of pyramidal structure is fixed in urceolus 1.2, three arc-shaped slots are had equably in voussoir 1.3 circumference, position corresponding with voussoir arc-shaped slot on urceolus 1.2 has breach, and the width of breach is slightly less than the diameter of steel ball 1.4, and steel ball 1.4 can move up and down in being placed in three arc-shaped slots in groove, when steel ball is in bottom, steel ball some be exposed at outside urceolus 1.2, when in the top, steel ball is completely in urceolus 1.2.After pressure break terminates, isolated tube is caught when being gone out oil recovery (gas) tree by highly pressurised liquid by isolated tube 12.
Have inverted cone anti-bias piece 1.5 is connected bottom urceolus 1.2, first urceolus 1.2 is inverted before installation, steel ball 1.4 is put into, it is made to fall in the bottom of urceolus 1.2, installing anti-bias piece 1.5 again, anti-bias piece of 1.5 lower ends are drilled with handling hole 1.6, owing to anti-bias piece 1.5 is inverted cone-shaped structure, it is likely not to have suitable instrument its down-hole is mounted and dismounted, so solving this problem by design handling hole 1.6.
Described connecting short section 11 is connected with (gas) the tree tubing thread that recovers the oil, and catcher 1 all uses tubing thread to be connected with thick cyclinder 4, thick cyclinder 4 with separation valve door 8 with blowout prevention nipple 2, blowout prevention nipple 2.
Isolated tube 12 lower end is sequentially connected with top connection 13, central canal 14 and lower contact 16, packing element 15 is enclosed within central canal 14 to be fixed by top connection 13 and lower contact 16, having gap on central canal 14 circumference, liquid enters in packing element 15 by gap, and reducer 17 is arranged in lower contact 16.All use threaded between isolated tube 12, top connection 13, central canal 14, packing element 15, lower contact 16 and reducer 17
Further, between blowout prevention nipple 2 with thick cyclinder 4, between thick cyclinder 4 and separation valve door 8, all use tubing thread to be connected, be provided with box cupling 3.
Further, isolated tube 12 upper end uses the conical surface and convex shoulder structure, being respectively arranged with two O RunddichtringOs 9 on the conical surface and convex shoulder, two sealing rings on convex shoulder not only seal and also act as centralizing function, it is ensured that align with catcher 1 when isolated tube is rushed out oil recovery (gas) tree；Lower end connects central canal 14 and packing element 15 by top connection 13 and lower contact 16；Reducer 17 is threadedly attached in the lower end of lower contact 16, realizes the pressure reduction inside and outside packing element 15 by the effect of throttling, makes packing element 15 realize setting.
Further, equipped with two O RunddichtringOs 9 on reducer 17, sealing ring 9 can prevent liquid from entering packing element 15 space outerpace during packing element 15 sets, thus ensure that and have enough pressure reduction inside and outside packing element 15；Effectively increase the lifting surface area of bottom surface when the complete open flow of pressure break, isolated tube 12 is gone out smoothly oil recovery (gas) tree and greatly facilitates effect.
Described briefly below put into the work process returning out formula tree protector.
Refering to Fig. 1.If there is no pressure in well, only separation valve door need to be installed, isolated tube is direct plungeed in well；If there being pressure in well, by tubing thread, protector is arranged on oil recovery (gas) tree well head.Open separation valve door, isolated tube can glide a segment distance voluntarily by gravity, then injects highly pressurised liquid by lubricator, and under differential pressure action, isolated tube is descending, after the isolated tube conical surface and connecting short section conical surface close contact and packing element 15 are completely into double male joint, suppress end.Dismantle thick-walled tube and blowout prevention nipple, connect pressure break pipeline in separation valve door upper end and carry out pressure testing, fracturing work is started after pressure testing is qualified, effect due to reducer, higher than external pressure thus oil pipe is close in expansion to make packing element 15 internal pressure, and to recovering the oil, (gas) tree serves buffer action.
After pressure break terminates, closing separation valve door, pressure break of dismantling pipeline, if there is no pressure in well, can directly isolated tube be proposed；If there being pressure in well, then thick-walled tube, connecting short section and catcher are installed along with on separation valve door, open separation valve door after installing and open flow valve carries out open flow, now the pressure due to isolated tube top is less than the pressure of bottom, under the effect of pressure reduction, isolated tube can go out oil recovery (gas) tree, and it is caught by catcher.Complete Deng open flow, protector is unloaded from (gas) tree of recovering the oil.
Above content is to combine concrete preferred implementation further detailed description of the utility model; it cannot be assumed that detailed description of the invention of the present utility model is only limitted to this; for this utility model person of an ordinary skill in the technical field; without departing from the concept of the premise utility; some simple deduction or replace can also be made, all should be considered as belonging to this utility model and be determined scope of patent protection by the claims submitted to.
Claims (10)
1. one kind can put into and returns out formula tree protector, it is characterised in that: include catcher (1), thick cyclinder (4), separation valve door (8), connecting short section (11), isolated tube (12), packing element (15) and reducer (17)；
Described thick cyclinder (4) upper end is closed by plug (1.1), catcher (1) is fixed on plug (1.1) bottom and is placed in thick cyclinder (4), and connecting short section (11) is connected to thick cyclinder (4) lower end；Isolated tube (12) is placed in thick cyclinder (4) and freely up and down can move in thick cyclinder (4), hollow isolated tube (12) upper end outer wall is the conical surface and convex shoulder structure, described connecting short section (11) upper end inwall is also taper surface, for hang isolated tube (12) and and isolated tube (12) between realize sealing, isolated tube (12) lower end connects packing element (15) and reducer (17)；Separation valve door (8) is arranged on thick cyclinder (4), and isolated tube (12) is closed in thick cyclinder (4) by separation valve door (8)；
Tree protector is arranged on production tree upper end by connecting short section (11); separation valve door (8) is opened during pressure break; isolated tube (12) leans on gravity fall one segment distance, then makes isolated tube (12) go downwards to predetermined work position and make packing element (15) expand sealing between oil pipe by upper and lower pressure reduction；Pressure break utilizes the pressure in well to make isolated tube (12) go out well head after terminating, utilize catcher (1) to catch.
Can put into the most as claimed in claim 1 and return out formula tree protector, it is characterised in that: described catcher (1) is made up of urceolus (1.2), voussoir (1.3) and steel ball (1.4)；Urceolus (1.2) is welded on plug (1.1), the voussoir (1.3) of pyramidal structure is fixed in urceolus (1.2), three arc-shaped slots are had equably in voussoir (1.3) circumference, the upper position corresponding with voussoir arc-shaped slot of urceolus (1.2) has breach, the width of breach is slightly less than the diameter of steel ball (1.4), steel ball (1.4) can move up and down in being placed in three arc-shaped slots in groove, when steel ball is in bottom, steel ball some be exposed at urceolus (1.2) outside, when in the top, steel ball is completely in urceolus (1.2).
Can put into the most as claimed in claim 2 and return out formula tree protector; it is characterized in that: described urceolus (1.2) bottom connects anti-bias piece (1.5) having inverted cone, and anti-bias piece of (1.5) lower end is drilled with handling hole (1.6).
The most according to claim 2 input returns out formula tree protector; it is characterized in that: one section of cylinder is arranged at described voussoir (1.3) top; urceolus (1.2) bottom has blind hole, is fixed voussoir (1.3) upper end in the blind hole of cylinder insertion urceolus (1.2).
Can put into the most as claimed in claim 1 and return out formula tree protector; it is characterized in that: connecting between described thick cyclinder (4) and connecting short section (11) has blowout prevention nipple (2); plug (1.1) is by blowout prevention nipple (2) upper end closed; the upper connection of blowout prevention nipple (2) has lubricator (5), and lubricator (5) is provided with open flow valve (6).
Can put into the most as claimed in claim 1 and return out formula tree protector; it is characterized in that: described isolated tube (12) lower end is sequentially connected with top connection (13), central canal (14) and lower contact (16); packing element (15) is enclosed within central canal (14) to be fixed by top connection (13) and lower contact (16); gap is had on central canal (14) circumference; liquid is entered in packing element (15) by gap, and reducer (17) is arranged in lower contact (16).
Can put into the most as claimed in claim 6 and return out formula tree protector, it is characterised in that: all use threaded between described isolated tube (12), top connection (13), central canal (14), packing element (15), lower contact (16) and reducer (17).
Can put into the most as claimed in claim 5 and return out formula tree protector, it is characterised in that: between described blowout prevention nipple (2) with thick cyclinder (4), between thick cyclinder (4) and separation valve door (8), all use tubing thread to be connected.
9. putting into as described in claim 2 or 5 returns out formula tree protector, it is characterised in that: it is respectively provided with two O RunddichtringOs (9) on described isolated tube (12) the upper end conical surface and convex shoulder.
10. putting into as described in claim 2 or 5 returns out formula tree protector, it is characterised in that: equipped with two O RunddichtringOs (9) on described reducer (17).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521104125.5U CN205445530U (en) | 2015-12-28 | 2015-12-28 | Can drop into formula of returning out well head protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521104125.5U CN205445530U (en) | 2015-12-28 | 2015-12-28 | Can drop into formula of returning out well head protector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205445530U true CN205445530U (en) | 2016-08-10 |
Family
ID=56578807
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521104125.5U Expired - Fee Related CN205445530U (en) | 2015-12-28 | 2015-12-28 | Can drop into formula of returning out well head protector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205445530U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105401904A (en) * | 2015-12-28 | 2016-03-16 | 西安石油大学 | Input reversing-out type wellhead protector |
-
2015
- 2015-12-28 CN CN201521104125.5U patent/CN205445530U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105401904A (en) * | 2015-12-28 | 2016-03-16 | 西安石油大学 | Input reversing-out type wellhead protector |
| CN105401904B (en) * | 2015-12-28 | 2018-02-13 | 西安石油大学 | One kind, which can be put into, returns out formula tree protector |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160810 Termination date: 20171228 |