CN202000949U - Well head blocking device - Google Patents
Well head blocking device Download PDFInfo
- Publication number
- CN202000949U CN202000949U CN2011201153985U CN201120115398U CN202000949U CN 202000949 U CN202000949 U CN 202000949U CN 2011201153985 U CN2011201153985 U CN 2011201153985U CN 201120115398 U CN201120115398 U CN 201120115398U CN 202000949 U CN202000949 U CN 202000949U
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- CN
- China
- Prior art keywords
- well head
- blocking device
- spanner
- bar portion
- head blocking
- 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 - Lifetime
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Abstract
The utility model discloses a well head blocking device. The device comprises a barrel-shaped bracket with an axially run-through accommodating cavity, wherein a pressing cap is arranged at the upper port of the accommodating cavity; a transmission rod group axially passes through the pressing nut and the accommodating cavity; the upper end of the transmission rod group is fixedly connected with a hand wheel; the hand wheel drives the transmission rod group to axially extend and retract; the lower end of the transmission rod group is connected with a plug through a spanner; the plug comprises a rod part for connecting the spanner and a blocking part for blocking a tubing hanger of a well head; and the rod part is detachably connected with the spanner. The well head is replaced under pressure, and the device has the advantages that: the device has a compact structure, reliable blowout prevention performance and high adaptability, and is easy to control, safe in operation and convenient to operate.
Description
Technical field
The utility model relates to the well head blocking device of heavy crude heat extraction, when relating in particular to a kind of can or the inefficacy when take place to leak at the well head position, replace with pressure well head big four is with top, with the well head blocking device of effective minimizing well killing change well head, belong to the corollary equipment of not kill-job of high temperature steam flooding well head.
Background technology
At present, in field of petroleum exploitation, along with the carrying out of the polynary conversion mining type of heavy crude reservoir, the steam driving exploitation technology has obtained constantly improving and improving, and enters a brand-new stage.The steam driving exploitation technology is applied to the steam flooding centerwell needs long-term, continuous steam injection.And in steam injection process, may have series of technical such as head valve leakage, steel ring inefficacy.For this reason, in the time of need or losing efficacy when take place to leak at the well head position, change wellhead component, and the well killing change well head causes not only cost to increase, also can influence temperature that the steam flooding well group formed, and can polluted reservoir, oil recovery reduced.For not kill-job of high temperature steam flooding well head, just need replace with pressure well head big four with top, with the above-mentioned defective of effective minimizing well killing change well head.
When not kill-job of high temperature steam flooding well head is changed, for smooth replace with pressure well head, guarantee carrying out smoothly of high-temperature operation, need carry out shutoff to the high-temperature gas in the tubing string, and the high-temperature gas in the tubing string is divided into annular space gas and oil pipe gas, wherein, annular space gas is by packer sealing; And the shutoff of oil pipe gas has been become the technical barrier that solves the replace with pressure well head.
Because the problem that above-mentioned prior art exists, the design people is based on being engaged in relevant design and field experience and professional knowledge, actively improved and innovated, developed the supporting technology of not kill-job of high temperature steam flooding well head, promptly developed a kind of novel well head blocking device.This well head blocking device can be plugged on the tubing hanger of not kill-job of high temperature steam flooding well head and can realize breaking away from, and reaches the purpose of replace with pressure well head.
The utility model content
The purpose of this utility model provides and a kind ofly can realize the replace with pressure well head, and compact conformation is easy to control, blowout prevention dependable performance, easy-to-operate, adaptable well head blocking device.
For achieving the above object, the utility model proposes a kind of well head blocking device, the tubular support that comprises containing cavity with axial perforation, upper port at described containing cavity is provided with pressure cap, one drive link group is vertically through described pressure cap and described containing cavity, fixedly connected with handwheel in the upper end of described drive link group, it is flexible vertically that described handwheel drives described drive link group, the lower end of described drive link group is connected with plug by spanner, described plug comprise the bar portion that is used to connect described spanner and with the choking portion that is used for shutoff well head tubing hanger, described bar portion can be connected removably with described spanner.
Aforesaid well head blocking device, wherein, described spanner offers the slot that is used to hold described bar portion vertically, the lower ending opening of described slot, described bar portion can be held in the described slot slidably by the gripping mechanism that is arranged in the described spanner.
Aforesaid well head blocking device, wherein, outer wall at described spanner evenly offers at least two installing holes between the described slot along same side face, described gripping mechanism is located in the described installing hole, described gripping mechanism comprises holder, spring and the steel ball that ecto-entad connects successively, described holder is fixedlyed connected with described installing hole inwall, and described steel ball is resisted against described bar portion by described spring.
Aforesaid well head blocking device, wherein, the position corresponding to described steel ball on the outer wall of described bar portion axially offers guide groove along being parallel to, and the both ends of described guide groove are the arc surfaced of indent.
Aforesaid well head blocking device, wherein, described installing hole is towards the diameter of the openend of the described bar portion one side diameter less than described steel ball.
Aforesaid well head blocking device wherein, is provided with external screw thread on the outer wall of described choking portion.
Aforesaid well head blocking device, wherein, described drive link group comprises screw rod and transmission sleeve, described pressure cap is passed in the upper end of described screw rod, and fixedly connected with described handwheel, described transmission sleeve is connected with described screw flight by screw, and fixed cover is provided with anti-pivoted housing in the outside of described screw, described anti-pivoted housing and described containing cavity orientation are slidingly matched, and described handwheel is flexible vertically by the described transmission sleeve of described screw drive.
Aforesaid well head blocking device, wherein, be fixed with the sealed packing assembly in the lower end of described containing cavity, described black box comprises the packing seat, described transmission sleeve runs through described packing seat, be arranged with a plurality of sealed packings in the gap between described packing seat and described transmission sleeve, be provided with the packing pressure cap in the upper end of described sealed packing.
Aforesaid well head blocking device wherein, is provided with buffer spring in the junction of described spanner and described transmission sleeve.
Aforesaid well head blocking device wherein, is provided with thrust bearing between described pressure cap and described screw rod.
Compared with prior art, the utlity model has following characteristics and advantage:
1, the utility model can be connected with spanner removably by plug, realizes the non-stop plugging well head and is separated with the tubing hanger of well head, has compact conformation, is easy to control, avoids the ejection of well inner high voltage steam, improves the effect of security reliability.
2, manual reverse of direction sensitivity of the present utility model, compliance is strong, and is simple in structure, is easy to make.
3, the utility model adopts the sealed packing assembly, has the advantage of good seal performance.
4, the bar portion of plug of the present utility model can be held in the described slot by gripping mechanism slidably, can play positioning clamping effect to plug, the bar portion that can guarantee plug again endwisely slips in the effect lower edge of external force, and the realization plug is connected or disengaging with spanner.
Description of drawings
The following drawings only is intended to the utility model done and schematically illustrates and explain, does not limit scope of the present utility model.Wherein,
Fig. 1 is the structural representation of the utility model well head blocking device;
Fig. 2 is that the A-A of Fig. 1 is to cross-sectional view;
Fig. 3 is that the B-B of Fig. 1 is to cross-sectional view;
Fig. 4 is combine with spanner partly structural representation of plug of the present utility model.
Description of reference numerals:
The 1-support; The 11-containing cavity; The 12-pressure cap; The 3-handwheel;
2-drive link group; The 21-screw rod; 22-transmission sleeve; The 23-screw; 24-prevents pivoted housing;
The 4-spanner; The 41-slot; The 42-installing hole; The 5-plug; 51-bar portion; The 52-choking portion; The 53-guide groove; The 54-external screw thread;
The 6-gripping mechanism; The 61-holder; The 62-spring; The 63-steel ball;
7-sealed packing assembly; 71-packing seat; The 72-sealed packing; 73-packing pressure cap; The 8-buffer spring; The 9-thrust bearing.
The specific embodiment
Understand for technical characterictic of the present utility model, purpose and effect being had more clearly, now contrast the description of drawings specific embodiment of the present utility model.
Please refer to Fig. 1,2,3, be respectively the structural representation of the utility model well head blocking device; The A-A of Fig. 1 is to cross-sectional view; And the B-B of Fig. 1 is to cross-sectional view.As shown in the figure, a kind of well head blocking device that the utility model proposes comprises the tubular support 1 of the containing cavity 11 with axial perforation, is provided with pressure cap 12 in the upper port of described containing cavity 11, is used to seal the upper port of described containing cavity 11; Drive link group 2 is vertically through described pressure cap 12 and described containing cavity 11, fixedly connected with handwheel 3 in the upper end of described drive link group 2, it is flexible vertically that described handwheel 3 drives described drive link group 2, it is prior art that described handwheel 3 drives the flexible vertically structure of described drive link group 2, no longer describes in detail at this.In the utility model, the lower end of described drive link group 2 is connected with plug 5 by spanner 4, like this, when shutoff, drive drive link groups 2 by rotation hand wheel 3 and extend downwards vertically, so drive spanner 4 and plug 5 descending, until reaching the position that combines with the tubing hanger of well head.Please in the lump with reference to figure 4, be combine with the spanner structural representation of part of plug of the present utility model.As shown in the figure, described plug 5 comprises bar portion 51 and choking portion 52, and described choking portion 52 is connected with the tubing hanger of well head, is used for the shutoff well head; Described bar portion 51 can be connected removably with described spanner 4, thereby after making that the choking portion 52 of plug 5 is plugged in the tubing hanger of well head, realizes that choking portion 52 and well head blocking device are separated.In the present embodiment, described spanner 4 offers slot 41 vertically, and slot 41 is complementary with the shape of bar portion 51, is used to hold described bar portion 51, the lower ending opening of described slot 41 makes the bar portion 51 of plug 5 to be stretched in the slot 41 by the lower ending opening of this slot 41.And described bar portion 51 can be held in the described slot 41 slidably by the gripping mechanisms 6 that are arranged in the described spanner 4, has so just realized dismounting function between plug 5 and the spanner 4.But the utility model also is not limited thereto, and also can adopt as being threaded or other known removable connected modes, as long as guarantee in use, reaches the purpose that spanner 4 and plug 5 freely combine with disengaging and gets final product.
Further, as shown in Figure 4, outer wall at described spanner 4 evenly offers two installing holes 42 between the described slot 41 along same side face (cross section), in described installing hole 41, be provided with described gripping mechanism 6, described gripping mechanism 6 comprises holder 61, spring 62 and the steel ball 63 that ecto-entad connects successively, described holder 61 is fixedlyed connected with described installing hole 41 inwalls, and described steel ball 63 is resisted against described bar portion 51 by described spring 62.Steel ball 63 makes bar portion 51 be held in the slot 41 of spanner 4 by the elastic force of spring 62 like this, thereby plays the effect of location plug 5.Installing hole 42 of the present utility model also is not limited to two, can offer 3,4 or more a plurality of installing hole 42 according to actual needs, as long as assurance bar portion 51 can be held in the slot 41 and can slide vertically.
Further, as shown in Figure 4, the position corresponding to described steel ball 63 on the outer wall of described bar portion 51 axially offers guide groove 53 along being parallel to, and the both ends of described guide groove 53 are the arc surfaced of indent.Like this, when bar portion 51 and steel ball 63 broke away from or engage, steel ball 63 can be derived or import smoothly along the cambered surface of the indent of guide groove 53, makes that the well head blocking device is easy to control in use more, has reduced operation easier, has improved operating efficiency.
Further, as shown in Figure 4, described installing hole 42 is towards the diameter of the openend of the described bar portion 51 1 sides diameter less than described steel ball 65, make the part of steel ball 65 stretch out installing hole 42 and bar portion 51 contact mutually like this, and remainder is stopped by openend, avoided steel ball 65 in installing hole 42, to deviate from, thereby guaranteed that steel ball 65 moves back and forth in installing hole 42.
Further, as shown in Figure 4, on the outer wall of described choking portion 52, be provided with external screw thread 54, be used to screw in the tubing hanger (not shown) of not kill-job of steam flooding well head, thereby realize non-stop plugging, so that change well head.But the utility model also is not limited thereto, and also can adopt other known connected modes, blocks well head as long as can guarantee choking portion 52, makes the interior high steam of well can not spray and gets final product.In addition, the shape of choking portion 52 shapes and tubing hanger connecting portion is complementary, with the sealing that guarantees that choking portion 52 engages with tubing hanger.
Further, as shown in Figure 1, in the present embodiment, described drive link group 2 comprises screw rod 21 and transmission sleeve 22, and described transmission sleeve 22 is sheathed on the outside of described screw rod 21, and described pressure cap 12 is passed in the upper end of described screw rod 21, and fixedly connected with described handwheel 3, make 21 rotations of handwheel 3 drive screws to be provided with screw 23 in the upper end of described transmission sleeve 22, described transmission sleeve 22 is threaded with described screw rod 21 by described screw 23; Please in the lump with reference to figure 2, be provided with anti-pivoted housing 24 at the outside of described screw 23 fixed cover, described anti-pivoted housing 24 is slidingly matched with described containing cavity 11 orientations, being the axial notch of described anti-pivoted housing 24 both sides matches with axial fin on the described containing cavity 11 chamber walls, feasible anti-pivoted housing 24 does not rotate and can move up and down along fin (vertically promptly), and then plays the effect that prevents that transmission sleeve 22 from rotating.Like this when 21 rotations of handwheel 3 drive screws, transmission sleeve 22 does not rotate, and, make transmission sleeve 22, screw 23, anti-pivoted housing 24 move vertically together owing to be threaded between transmission sleeve 22 and the screw rod 21, reach the effect that transmission sleeve 22 stretches vertically; The sleeve of transmission simultaneously 22 drives spanner 4 and plug 5 moves vertically, and it is flexible vertically to make that described handwheel 3 drives described transmission sleeve 22 by described screw rod 21.In the shutoff process, when transmission sleeve 22 drives spanners 4 and plug 5 and comes downwards to the precalculated position, anti-pivoted housing 24 is separated with support 1, to prevent that by bolt pivoted housing 24, transmission sleeve 22 and screw rod 21 connect as one again, rotation hand wheel 3 makes anti-pivoted housing 24, transmission sleeve 22 and screw rod 21 rotate together and is descending, make plug 5 screw in the tubing hanger of not kill-job of steam flooding well head smoothly, realize non-stop plugging, to guarantee carrying out smoothly of replace with pressure shaft mouth operation.
Further, as shown in Figure 1, be fixed with sealed packing assembly 7 in the lower end of described containing cavity 11, described black box 7 comprises packing seat 71, described transmission sleeve 22 runs through described packing seat 71, is arranged with a plurality of sealed packings 72 in the gap between described packing seat 71 and described transmission sleeve 22, and sealed packing 72 adopts flexible graphite material, be provided with packing pressure cap 73 in the upper end of described sealed packing 72, deviate to prevent sealed packing 72.Like this, when the well head blocking device docked with well head, sealed packing assembly 7 was plugged in well head top, played the effect of sealing.
Further, as shown in Figure 1, be provided with buffer spring 8, play the effect of buffering in the junction of described spanner 3 and described transmission sleeve 22.
Further, as shown in Figure 1, between described pressure cap 12 and described screw rod 21, be provided with thrust bearing 9, be used to carry axial load, guarantee screw rod 21 rotations.
In the replace with pressure process, at first close the well head main valve, prevent that bottom pressure is excessive, guarantee that operating personnel avoid the threat of HTHP; Operating personnel are installed in the well head upper end with the utility model well head blocking device then; Subsequently, slowly open the well head main valve, also opened the passage that is lowered to of blocking device simultaneously.In blocking device shutoff process, clockwise rotate handwheel, it is descending vertically that handwheel drives the drive link group, and concrete descending process is described in detail hereinbefore, no longer repeats at this.After driving plug arrival precalculated position, anti-pivoted housing, power transmission shaft, screw rod connect as one by bolt and are rotated down, and have guaranteed certain downforce, make plug screw in the tubing hanger of not kill-job of steam flooding well head smoothly, realize non-stop plugging, to guarantee carrying out smoothly of replace with pressure well head.After the replacing shaft mouth operation is finished, plug need be salvaged, to continue in well, to annotate vapour.Step when repeating shutoff, when treating that spanner captures the bar portion of plug, the reverse rotation handwheel, and by bolt anti-pivoted housing, power transmission shaft, screw shaped are integral once more, make the tubing hanger of plug and well head be separated, and up together, the fishing of realization plug.
The above only is the schematic specific embodiment of the utility model, is not in order to limit scope of the present utility model.Any those skilled in the art, equivalent variations of having done under the prerequisite that does not break away from design of the present utility model and principle and modification all should belong to the scope that the utility model is protected.
Claims (10)
1. well head blocking device, the tubular support that comprises containing cavity with axial perforation, upper port at described containing cavity is provided with pressure cap, one drive link group is vertically through described pressure cap and described containing cavity, fixedly connected with handwheel in the upper end of described drive link group, it is flexible vertically that described handwheel drives described drive link group, it is characterized in that, the lower end of described drive link group is connected with plug by spanner, described plug comprise the bar portion that is used to connect described spanner and with the choking portion that is used for shutoff well head tubing hanger, described bar portion can be connected removably with described spanner.
2. well head blocking device as claimed in claim 1, it is characterized in that, described spanner offers the slot that is used to hold described bar portion vertically, the lower ending opening of described slot, and described bar portion can be held in the described slot slidably by the gripping mechanism that is arranged in the described spanner.
3. well head blocking device as claimed in claim 2, it is characterized in that, outer wall at described spanner evenly offers at least two installing holes between the described slot along same side face, described gripping mechanism is located in the described installing hole, described gripping mechanism comprises holder, spring and the steel ball that ecto-entad connects successively, described holder is fixedlyed connected with described installing hole inwall, and described steel ball is resisted against described bar portion by described spring.
4. well head blocking device as claimed in claim 3 is characterized in that, the position corresponding to described steel ball on the outer wall of described bar portion axially offers guide groove along being parallel to, and the both ends of described guide groove are the arc surfaced of indent.
5. well head blocking device as claimed in claim 4 is characterized in that, described installing hole is towards the diameter of the openend of the described bar portion one side diameter less than described steel ball.
6. as each described well head blocking device in the claim 1 to 5, it is characterized in that, on the outer wall of described choking portion, be provided with external screw thread.
7. well head blocking device as claimed in claim 1, it is characterized in that, described drive link group comprises screw rod and transmission sleeve, described pressure cap is passed in the upper end of described screw rod, and fixedly connected with described handwheel, described transmission sleeve is connected with described screw flight by screw, and fixed cover is provided with anti-pivoted housing in the outside of described screw, described anti-pivoted housing and described containing cavity orientation are slidingly matched, and described handwheel is flexible vertically by the described transmission sleeve of described screw drive.
8. well head blocking device as claimed in claim 7, it is characterized in that, be fixed with the sealed packing assembly in the lower end of described containing cavity, described black box comprises the packing seat, described transmission sleeve runs through described packing seat, be arranged with a plurality of sealed packings in the gap between described packing seat and described transmission sleeve, be provided with the packing pressure cap in the upper end of described sealed packing.
9. well head blocking device as claimed in claim 7 is characterized in that, is provided with buffer spring in the junction of described spanner and described transmission sleeve.
10. well head blocking device as claimed in claim 7 is characterized in that, is provided with thrust bearing between described pressure cap and described screw rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201153985U CN202000949U (en) | 2011-04-19 | 2011-04-19 | Well head blocking device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201153985U CN202000949U (en) | 2011-04-19 | 2011-04-19 | Well head blocking device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202000949U true CN202000949U (en) | 2011-10-05 |
Family
ID=44703694
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201153985U Expired - Lifetime CN202000949U (en) | 2011-04-19 | 2011-04-19 | Well head blocking device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202000949U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103867157A (en) * | 2014-02-14 | 2014-06-18 | 中国石油天然气股份有限公司 | Fast blocking device of pipe opening |
| CN110886588A (en) * | 2018-09-11 | 2020-03-17 | 中国石油天然气股份有限公司 | Simple well mouth plugging tool for coal bed gas well |
| RU2738637C1 (en) * | 2020-09-09 | 2020-12-15 | Андрей Анатольевич Дегтярев | Manual hermetic drive of the working bodies of the preventer |
-
2011
- 2011-04-19 CN CN2011201153985U patent/CN202000949U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103867157A (en) * | 2014-02-14 | 2014-06-18 | 中国石油天然气股份有限公司 | Fast blocking device of pipe opening |
| CN110886588A (en) * | 2018-09-11 | 2020-03-17 | 中国石油天然气股份有限公司 | Simple well mouth plugging tool for coal bed gas well |
| RU2738637C1 (en) * | 2020-09-09 | 2020-12-15 | Андрей Анатольевич Дегтярев | Manual hermetic drive of the working bodies of the preventer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20111005 |