CN104499983A - Sealing structure of Christmas tree cap - Google Patents
Sealing structure of Christmas tree cap Download PDFInfo
- Publication number
- CN104499983A CN104499983A CN201410823892.5A CN201410823892A CN104499983A CN 104499983 A CN104499983 A CN 104499983A CN 201410823892 A CN201410823892 A CN 201410823892A CN 104499983 A CN104499983 A CN 104499983A
- Authority
- CN
- China
- Prior art keywords
- treetop
- flange
- seal
- gas production
- endoporus
- 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.)
- Pending
Links
- 241000191291 Abies alba Species 0.000 title claims abstract description 49
- 238000007789 sealing Methods 0.000 title abstract description 26
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical group [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims abstract description 10
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 10
- 239000011593 sulfur Substances 0.000 claims abstract description 10
- 238000010276 construction Methods 0.000 claims description 33
- 238000012856 packing Methods 0.000 claims description 15
- 239000000463 material Substances 0.000 claims description 7
- 238000000926 separation method Methods 0.000 abstract 3
- 239000000356 contaminant Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/02—Surface sealing or packing
- E21B33/03—Well heads; Setting-up thereof
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B2200/00—Special features related to earth drilling for obtaining oil, gas or water
- E21B2200/01—Sealings characterised by their shape
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Gasket Seals (AREA)
Abstract
The invention discloses a sealing structure of a Christmas tree cap, which comprises a first sealing element and a second sealing element, wherein the first sealing element is arranged between an inner hole of a Christmas tree top flange and an external wall of a separation plug in a clamping manner; an outer ring of the first sealing element is clung to an internal wall of the inner hole of the Christmas tree top flange; an inner ring of the first sealing element is clung to the external wall of the separation plug; a groove is formed on one side, facing the interior of the inner hole of the Christmas tree top flange, of the first sealing element; an opening of the groove faces the interior of the inner hole of the Christmas tree top flange; the second sealing element is arranged between the inner hole of the Christmas tree top flange and the external wall of the separation plug in a clamping manner; the second sealing element and the first sealing element are arranged at an interval; and the second sealing element is arranged on one side, facing the exterior of the inner hole of the Christmas tree top flange, of the first sealing element. The structure is provided with the two sealing elements and effectively seals high-pressure high sulfur-bearing gas.
Description
Technical field
The present invention relates to a kind of hermetically-sealed construction of oil-gas mining field, be specifically related to a kind of hermetically-sealed construction of high pressure high sulfur resistive christmas tree cap.
Background technology
In prior art, adopt rubber seal as O shape circle for this type of seal majority, but this type of O shape circle cannot meet the long-term use in hyperbaric environment, and from material, the common used material of O shape circle all can not meet the working condition of high sulfur-bearing, special material meets working condition, but life cycle is shorter, and its cost is higher.Because christmas tree needs often dismounting point bulkhead when Oil Field uses, carry out other operation, hermetically-sealed construction originally cannot meet the requirement of often dismounting.
Summary of the invention
The invention provides a kind of hermetically-sealed construction of christmas tree cap, the gas in christmas tree can be sealed long-term effectively.
For achieving the above object, the invention provides a kind of hermetically-sealed construction of christmas tree cap, christmas tree cap comprises: gas production treetop flange, and it is provided with the endoporus led in christmas tree; Divide bulkhead, it is arranged in the opening of gas production treetop flange endoporus;
Be characterized in, the hermetically-sealed construction of above-mentioned christmas tree cap comprises:
First seal, it is folded between the outer wall of gas production treetop flange endoporus and point bulkhead; The inwall of gas production treetop flange endoporus is close in the outer ring of this first seal, and the inner ring of the first seal is close to the outer wall of point bulkhead; First seal is provided with groove towards the side in the flange endoporus of gas production treetop, and the opening of groove is towards in the flange endoporus of gas production treetop;
Second seal, it is folded between the outer wall of gas production treetop flange endoporus and point bulkhead; Second seal and the first seal interval are arranged, and the second seal is arranged at the first seal towards the side outside the flange endoporus of gas production treetop.
Above-mentioned first seal is lippacking, and the first seal forms the lip type structure of the first seal to the groove of the side in the flange endoporus of gas production treetop.
Above-mentioned second seal is o RunddichtringO.
The hermetically-sealed construction of above-mentioned christmas tree cap also comprises back-up ring, and this back-up ring is arranged at the first seal towards the side in the flange endoporus of gas production treetop, and establishes reeded one side to contact with the first seal; This back-up ring is mechanically connected with the outer wall of point bulkhead, the position of dismountable fixing back-up ring.
The above-mentioned point of corresponding outer wall arranging back-up ring of bulkhead is provided with cannelure, and the inner ring of back-up ring is embedded in this cannelure.
The hermetically-sealed construction of above-mentioned christmas tree cap also comprises packing ring, and this packing ring is arranged at the first seal towards the side outside the flange endoporus of gas production treetop, and contacts towards the one side outside the flange endoporus of gas production treetop with the first seal; This packing ring is mechanically connected with the outer wall of point bulkhead, and the scope that restriction packing ring edge point bulkhead moves axially is in the flange endoporus of gas production treetop.
Above-mentioned point of bulkhead is in the part in the flange endoporus of gas production treetop, and being Part I towards the part in the flange endoporus of gas production treetop, is Part II towards the part outside the flange endoporus of gas production treetop; Divide between the Part I of bulkhead and gas production treetop flange endoporus and be provided with gap, the Part II of point bulkhead and gas production treetop flange endoporus close contact;
Above-mentioned first seal is arranged at the Part I of point bulkhead; Second seal is arranged at the Part II of point bulkhead.
Above-mentioned point of bulkhead and gas production treetop flange outer sleeve are provided with top cover; Top cover is mechanically connected with a point bulkhead, stops a point bulkhead to move outside the flange endoporus of gas production treetop; The outer wall of top cover and gas production treetop flange is threaded connection.
Above-mentioned point of bulkhead is provided with escape orifice, and this escape orifice is communicated with the endoporus gas circuit of gas production treetop flange; This escape orifice opening part has outwardly been threaded dismountable screw of releasing.
Above-mentioned first seal adopts the material of sulfur resistive to make.
The hermetically-sealed construction of christmas tree cap of the present invention is compared with the hermetically-sealed construction of the christmas tree cap of prior art, its advantage is, the present invention adopts lippacking, when receiving the pressure in christmas tree, the both sides of lippacking push the external diameter of gas production treetop flange endoporus and point bulkhead respectively to, form joint ring, play the effect of sealing gas, and along with increasing of pressure, make lippacking both sides be fitted in sealing surface place more closely, make sealing performance better;
The present invention is provided with second seal, can prevent environmental contaminants from entering into gas production treetop flange inner, have influence on the sealing effectiveness of the first seal, and when the first seal fails, can effective seals high pressure gas;
Hermetically-sealed construction of the present invention is simple, has and can repeatedly dismantle, the advantage of Reusability.
Accompanying drawing explanation
Fig. 1 is the structural representation of the hermetically-sealed construction of christmas tree cap of the present invention;
Fig. 2 is the partial enlarged drawing of the hermetically-sealed construction of christmas tree cap of the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing, further illustrate specific embodiments of the invention.
The invention discloses a kind of hermetically-sealed construction of high pressure high sulfur resistive christmas tree cap, be arranged between gas production treetop flange and point bulkhead, by two seals part, effectively can seal up christmas tree inner high voltage high sulfur-containing gas.
As shown in Figure 1, christmas tree cap place includes gas production treetop flange 20 and point bulkhead 40.Gas production treetop flange 20 is provided with the endoporus led in christmas tree, and a point bulkhead 40 is arranged in the opening of gas production treetop flange 20 endoporus.
Dividing bulkhead 40 to be in the part in flange 20 endoporus of gas production treetop, is Part I towards the part in flange 20 endoporus of gas production treetop, and the part towards gas production treetop flange 20 endoporus outer (near gas production treetop flange 20 bore openings) is Part II.Divide between the Part I of bulkhead 40 and gas production treetop flange 20 endoporus and be provided with gap, the Part II of point bulkhead 40 and gas production treetop flange 20 endoporus close contact.
Divide in bulkhead 40 and be provided with escape orifice, this escape orifice is communicated with the endoporus gas circuit of gas production treetop flange 20.This escape orifice has been threaded with extraneous opening part dismountable screw 50 of releasing.When releasing screw 50 precession be fixed in escape orifice, the escape orifice being about to point bulkhead 40 is isolated with extraneous gas circuit; When releasing, screw 50 screws out escape orifice, and escape orifice is communicated with extraneous gas circuit, and christmas tree passes through escape orifice Exhaust Gas, borehole pressure of releasing fast.
Divide outside bulkhead 40 and gas production treetop flange 20 and be arranged with top cover 30.Top cover 30 is loop configuration, and top cover 30 is provided with circumferential band away from one end of gas production treetop flange 20, and this circumferential band hoop is outside point bulkhead 40 one end away from gas production treetop flange 20.Top cover 30 is provided with screw thread in the inside wall of gas production treetop flange 20, is provided with the screw thread matched with top cover 30 on the lateral wall at flange 20 bore openings place, gas production treetop simultaneously, and top cover 30 is threaded connection with the outer wall of gas production treetop flange 20.When top cover 30 precession, its circumferential band banding also fixes a point bulkhead 40, a point bulkhead 40 is stoped to move outside flange 20 endoporus of gas production treetop, prevent point bulkhead 40 from being produced by boasting by borehole pressure, cause and cannot form sealing between the hermetically-sealed construction of high pressure high sulfur resistive christmas tree cap disclosed in this invention, cause leaking.
As Fig. 1 and shown in composition graphs 2, be a kind of embodiment of hermetically-sealed construction of high pressure high sulfur resistive christmas tree cap.The hermetically-sealed construction of this christmas tree cap provides two seals part, is respectively: the first seal 11 and the second seal 13.
First seal 11 is folded between the outer wall of gas production treetop flange 20 endoporus and point bulkhead 40, is arranged in the gap of the Part I of point bulkhead 40.The inwall of gas production treetop flange 20 endoporus is close in the outer ring of the first seal 11, and the inner ring of the first seal 11 is close to the outer wall of point bulkhead 40.
The material of the first seal 11 can select the material of high sulfur resistive, makes it can use for a long time in the operating mode of highly corrosive and effective sealing.
First seal 11 is lippacking, and the first seal 11 is provided with groove towards the side in flange 20 endoporus of gas production treetop, and the opening of groove is towards in flange 20 endoporus of gas production treetop.This groove forms the lip type structure of the first seal 11.
When there is pressure, pressure enters in groove, promotion first seal 11 both sides are pushed on the external diameter of gas production treetop flange 20 endoporus and point bulkhead 40 by borehole pressure respectively, joint ring is formed to gas production treetop flange 20 endoporus and point bulkhead 40 place, wherein primary sealing area 15 is formed by between the first seal 11 and gas production treetop flange 20, and secondary sealing area 16 is formed by between the first seal 11 and point bulkhead 40.First seal 11 plays the effect of sealing gas, and increasing along with pressure, make lippacking both sides be fitted in sealing surface place more closely, make sealing performance better.
The hermetically-sealed construction of christmas tree cap also comprises back-up ring 10, and this back-up ring 10 is arranged at the first seal 11 towards the side in flange 20 endoporus of gas production treetop, and contacts with the one side that the first seal 11 is provided with lip type structure, drops for preventing the first seal 11.The outer wall that point bulkhead 40 Part I correspondence arranges back-up ring 10 is provided with cannelure, and the inner ring of back-up ring 10 is embedded and is arranged in the cannelure of point bulkhead 40 Part I, the position of dismountable fixing back-up ring 10 at this.
The hermetically-sealed construction of christmas tree cap also comprises packing ring 12, and this packing ring 12 is arranged at the first seal 11 towards the side outside flange 20 endoporus of gas production treetop, and contacts towards the one side outside flange 20 endoporus of gas production treetop with the first seal 11.First seal 11 is plane towards the one side of packing ring 12, and this packing ring 12 causes seal failure for preventing the first seal 11 transition deformation.
Semidiameter is there is owing to dividing between the Part I of bulkhead 4 and Part II, in the junction of Part I and Part II, form an annular shoulder, the radius of the Part I be separately greater than due to the radius of Part II, the shoulder of annular shoulder is arranged facing to (direction towards Part I) in flange 20 endoporus of gas production treetop.The width in the gap between the outer wall that the shoulder face width degree of this annular shoulder equals point bulkhead 4 Part I to gas production treetop flange 20 endoporus inwall.
Packing ring 12 offsets towards the one side outside flange 20 endoporus of gas production treetop with the shoulder face of annular shoulder, stops packing ring 12 to move outside the endoporus of gas production treetop flange 20, limits scope that packing ring 12 moves axially along point bulkhead 40 in flange 20 endoporus of gas production treetop.
Second seal 13 adopts o RunddichtringO, is arranged between gas production treetop flange 20 endoporus and the outer wall dividing bulkhead 40, and is arranged at the Part II place of point bulkhead 40.Divide bulkhead 40 Part II place that the position of the second seal 13 is set, be also provided with cannelure, the second seal 13, be embedded in this cannelure at point bulkhead 40 Part II place.
Second seal 13 and the first seal 11 interval are arranged, and the second seal 13 is arranged at the first seal 11 towards the side outside flange 20 endoporus of gas production treetop.Second seal 13 is auxiliary seal, can prevent environmental contaminants from entering into gas production treetop flange inner, have influence on the sealing effectiveness of the first seal 11, and when the first seal 11 lost efficacy, can effective seals high pressure gas.
Although content of the present invention has done detailed introduction by above preferred embodiment, will be appreciated that above-mentioned description should not be considered to limitation of the present invention.After those skilled in the art have read foregoing, for multiple amendment of the present invention and substitute will be all apparent.Therefore, protection scope of the present invention should be limited to the appended claims.
Claims (10)
1. a hermetically-sealed construction for christmas tree cap, described christmas tree cap comprises: gas production treetop flange (20), and it is provided with the endoporus led in christmas tree; Divide bulkhead (40), it is arranged in the opening of gas production treetop flange (20) endoporus;
It is characterized in that, the hermetically-sealed construction of described christmas tree cap comprises:
First seal (11), it is folded between the outer wall of gas production treetop flange (20) endoporus and point bulkhead (40); The inwall of gas production treetop flange (20) endoporus is close in the outer ring of this first seal (11), and the inner ring of the first seal (11) is close to the outer wall of a point bulkhead (40); First seal (11) is provided with groove towards the side in flange (20) endoporus of gas production treetop, and the opening of groove is towards in flange (20) endoporus of gas production treetop;
Second seal (13), it is folded between the outer wall of gas production treetop flange (20) endoporus and point bulkhead (40); Second seal (13) and the first seal (11) interval are arranged, and the second seal (13) is arranged at the first seal (11) towards the side outside flange (20) endoporus of gas production treetop.
2. the hermetically-sealed construction of christmas tree cap as claimed in claim 1, it is characterized in that, described first seal (11) is lippacking, and the first seal (11) forms the lip type structure of the first seal (11) to the groove of the side in flange (20) endoporus of gas production treetop.
3. the hermetically-sealed construction of christmas tree cap as claimed in claim 1, it is characterized in that, described second seal (13) is o RunddichtringO.
4. the hermetically-sealed construction of christmas tree cap as claimed in claim 1, it is characterized in that, the hermetically-sealed construction of described christmas tree cap also comprises back-up ring (10), this back-up ring (10) is arranged at the first seal (11) towards the side in flange (20) endoporus of gas production treetop, and establishes reeded one side to contact with the first seal (11); This back-up ring (10) is mechanically connected with the outer wall of point bulkhead (40), the position of dismountable fixing back-up ring (10).
5. the hermetically-sealed construction of christmas tree cap as claimed in claim 4, is characterized in that, the outer wall that described point of bulkhead (40) correspondence arranges back-up ring (10) is provided with cannelure, and the inner ring of back-up ring (10) is embedded in this cannelure.
6. the hermetically-sealed construction of christmas tree cap as claimed in claim 1, it is characterized in that, the hermetically-sealed construction of described christmas tree cap also comprises packing ring (12), this packing ring (12) is arranged at the first seal (11) towards the side outside flange (20) endoporus of gas production treetop, and contacts towards the one side outside flange (20) endoporus of gas production treetop with the first seal (11); This packing ring (12) is mechanically connected with the outer wall of point bulkhead (40), and the scope that restriction packing ring (12) edge point bulkhead (40) moves axially is in flange (20) endoporus of gas production treetop.
7. the hermetically-sealed construction of christmas tree cap as claimed in claim 1, it is characterized in that, described point of bulkhead (40) is in the part in flange (20) endoporus of gas production treetop, being Part I towards the part in flange (20) endoporus of gas production treetop, is Part II towards the part outside flange (20) endoporus of gas production treetop; Divide between the Part I of bulkhead (40) and gas production treetop flange (20) endoporus and be provided with gap, the Part II of point bulkhead (40) and gas production treetop flange (20) endoporus close contact;
Described first seal (11) is arranged at the Part I of a point bulkhead (40); Second seal (13) is arranged at the Part II of a point bulkhead (40).
8. the hermetically-sealed construction of christmas tree cap as claimed in claim 1, is characterized in that, is arranged with top cover (30) outside described point of bulkhead (40) and gas production treetop flange (20); Top cover (30) is mechanically connected with a point bulkhead (40), stops point bulkhead (40) to the movement outward of gas production treetop flange (20) endoporus; Top cover (30) is threaded connection with the outer wall of gas production treetop flange (20).
9. the hermetically-sealed construction of christmas tree cap as claimed in claim 1, it is characterized in that, described point of bulkhead (40) is provided with escape orifice, and this escape orifice is communicated with the endoporus gas circuit of gas production treetop flange (20); This escape orifice opening part has outwardly been threaded dismountable screw of releasing (50).
10. the hermetically-sealed construction of christmas tree cap as claimed in claim 1, is characterized in that, described first seal (11) adopts the material of sulfur resistive to make.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410823892.5A CN104499983A (en) | 2014-12-26 | 2014-12-26 | Sealing structure of Christmas tree cap |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410823892.5A CN104499983A (en) | 2014-12-26 | 2014-12-26 | Sealing structure of Christmas tree cap |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104499983A true CN104499983A (en) | 2015-04-08 |
Family
ID=52941423
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410823892.5A Pending CN104499983A (en) | 2014-12-26 | 2014-12-26 | Sealing structure of Christmas tree cap |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104499983A (en) |
-
2014
- 2014-12-26 CN CN201410823892.5A patent/CN104499983A/en active Pending
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|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
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Application publication date: 20150408 |