CN202165063U - Erosion resistant underground flow nipple for sour gas well - Google Patents
Erosion resistant underground flow nipple for sour gas well Download PDFInfo
- Publication number
- CN202165063U CN202165063U CN2011202404548U CN201120240454U CN202165063U CN 202165063 U CN202165063 U CN 202165063U CN 2011202404548 U CN2011202404548 U CN 2011202404548U CN 201120240454 U CN201120240454 U CN 201120240454U CN 202165063 U CN202165063 U CN 202165063U
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- muzzle
- nozzle
- lining
- centre bore
- nozzle parent
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Abstract
An erosion resistant underground flow nipple for a sour gas well is applied to the underground throttling of a gas well. A nozzle precursor is a cylindrical shape and is provided with a center hole, and a bush is fixed in the center hole of the nozzle matrix by interference fit. The bush is provided with a center hole, and the diameter of the center hole is between 2 mm to 10 mm; the length of the bush is equal to the length of the nozzle matrix; the bush is made of cemented carbide; a pin bolt is fixed in a radial screw hole on the wall of a nipple jack so as to fix the nozzle matrix in the nipple jack; an annular sealing groove is arranged on the outer wall of the nozzle matrix, and a sealing ring is arranged in the sealing groove. The erosion resistant underground flow nipple breaks the traditional bush structure, and the bush adopts corrosion resistant and impact resistant alloy materials so as to improve the service life of the nipple; in addition, the pin bolt is adopted for fixing the nipple, so that a tubular column can be prevented from falling to the bottom of the well during going down to the well.
Description
Technical field
The utility model relates to oil gas field production gas technology field, and particularly a kind of downhole choke nozzle is a kind of anti-impact erosion downhole choke mouth that is applicable to sour gas well.
Background technology
Hydrogen sulfide has stronger corrosivity to downhole tool, the corrosion failure of hydrogen sulfide often show as by spot corrosion cause local wall thickness attenuate, pit or (with) perforation, hydrogen sulfide also can cause hydrogen blister, sulphur compound stress-corrosion cracking and the hydrogen embrittlement of steel.Hydrogen sulfide is varied to the forms of corrosion of petroleum gas equipment and steel.
The downhole choke technology is oil gas field not sulfur-bearing or little, low sulfur-bearing (H in Sichuan
2S content＜5g/m
3) extensively carried out application in the gas well, obtained good technical economic benefit and social benefit.Traditional flow nipple adopts overall structure, and the hydrogen sulfide corrosion-resistant performance is low, needs often to change flow nipple.The flow nipple replacing of down-hole need trip out tubing string in well, influence gas production production.Conventional underground throttle device can not satisfy the application in sulfur-bearing gas field, and hydrogen sulfide has had a strong impact on the gas well gas production to downhole choke mouth corrosivity.
Chinese patent publication number: CN201218090Y provides a kind of " variable latus rectum underground throttle device ".Comprise fishing head, body, slip insert, seal, muzzle body, muzzle; Slip insert is housed on the body; In the muzzle body muzzle is installed, between body and muzzle body, is provided with seal, solve gas well application underground throttle device and can not salvage the contingency question that is brought.The flow nipple Analysis of Nested Design is in the underground throttle device lower end, and well killing fluid direct circulation and wireline operation can be cut off flow nipple cover pin, and the flow nipple position is changed, and latus rectum obtains the 30mm circulation canal in the underground throttle device, guarantees the ordinary production of gas well.
Chinese patent publication number: CN2108794 provides a kind of " anti-sulphur restriction choke ".Be used for sulfur-bearing (oil) gas well and adopt the defeated anti-sulphur ground restriction choke of producing, mainly form by body and throttling bodies.One flow nipple that is easy to change is arranged on the throttling bodies, is throttle orifice in it.The size in aperture is decided according to the size of flow and required pressure drop.Flow nipple is processed with the material of anti-sulfur-containing gas burn into spurt such as 6YC-1,6YC-2.
The utility model content
The purpose of the utility model is: a kind of anti-impact erosion downhole choke mouth that is used for sour gas well is provided, can satisfies the requirement of on-the-spot sour gas well downhole choke technology, and have the characteristic of hydrogen sulfide corrosion resistant, antiscour, improve the application life of nozzle.
The technical scheme that the utility model adopts is: be used for the anti-impact erosion downhole choke mouth of sour gas well, comprise: muzzle, sealing ring, pin, nozzle parent and lining; Muzzle is the cylinder bodily form, and there is screw thread the muzzle upper end, can be connected in the tubing string of subsurface choke device, and centre bore is arranged in the muzzle, and oriented projecting inward ring-shaped step in the muzzle centre bore is fixed with a nozzle parent in the ring-shaped step lower end of muzzle centre bore; It is characterized in that: described nozzle parent is the cylinder bodily form, and the nozzle parent has centre bore, in nozzle parent centre bore, adopts interference fit to be fixed with a lining.Lining has centre bore, and the diameter of lining centre bore is between 2～10mm; The equal in length of the length of lining and nozzle parent; The material of lining be carbide alloy as: tungsten-cobalt hard alloy, tungsten titanium cobalt hard alloy, tungsten titanium tantalum (niobium) carbide alloy, lining adopt powder metallurgy process to process; Radially screw is arranged on the muzzle lower end wall; On nozzle parent outer wall, fixing hole is arranged, the radially screw of muzzle is relative with the fixing hole of nozzle parent, on the muzzle wall, radially is fixed with pin in the screw; Pin is inner in the fixing hole of nozzle parent, and pin is fixed on the nozzle parent in the muzzle; On nozzle parent outer wall, annular seal groove is arranged, sealing ring is arranged in seal groove.
In order to make the high-velocity fluid that gets into lining weaken the impact to the lining inwall, nozzle parent lower end outer wall has screw thread, and screw thread is fixed with baffle in the lower end of nozzle parent; Described baffle is the cylinder bodily form, and there is internal thread the upper end of baffle, and there is parabola shaped centre bore the baffle lower end, and the parabola shaped centre bore upper end diameter of baffle is identical with the diameter of lining centre bore.
The beneficial effect of the utility model: the utility model is used for the anti-impact erosion downhole choke mouth of sour gas well, and the nozzle arrangements that breaks traditions adopts bush structure, and lining adopts corrosion-resistant, shock proof alloy material, improves nozzle application life.Adopt the dowel fixes nozzle in addition, prevent in tubing string is gone into the well process, to fall into the shaft bottom.
Description of drawings
Fig. 1 is the anti-impact erosion downhole choke mouth structure sketch map that is used for sour gas well.
Among the figure, 1-muzzle, 2-sealing ring, 3-pin, 4-nozzle parent, 5-lining, 6-baffle.
The specific embodiment
Embodiment 1: with an anti-impact erosion downhole choke mouth that is used for sour gas well is example, is elaborated.
With reference to Fig. 1, the utility model is used for the anti-impact erosion downhole choke mouth of sour gas well, comprising: muzzle 1, sealing ring 2, pin 3, nozzle parent 4 and lining 5.
Because the downhole choke structure of nozzle is different, the title that the technician gives muzzle 1 has multiple, and the effect of muzzle 1 is that fixed nozzle is used.The muzzle 1 of the utility model is the cylinder bodily form, and there is screw thread muzzle 1 upper end.In the muzzle 1 centre bore is arranged, oriented projecting inward ring-shaped step in muzzle 1 centre bore is fixed with a nozzle parent 4 in the ring-shaped step lower end of muzzle 1 centre bore.
Described nozzle parent 4 is the cylinder bodily form, and nozzle parent 4 upper end diameter are 44mm.It is the centre bore of 15mm that nozzle parent 4 has a diameter, in nozzle parent 4 centre bores, adopts interference fit to be fixed with a lining 5.Lining 5 has centre bore, and the diameter of lining 5 centre bores is 6mm.The length of the length of lining 5 and nozzle parent 4 is 42mm.The material of lining 5 is a tungsten-cobalt hard alloy.Lining 5 adopts powder metallurgy process to process, and the outer wall of lining 5 can adopt grinding machine processing.
On muzzle 1 lower end wall, be symmetrically distributed with two radially screws; Two fixing holes are arranged on nozzle parent 4 outer walls; The radially screw of muzzle 1 is relative with the fixing hole of nozzle parent 4; Each radially is fixed with a pin 3 in the screw (also claim: jackscrew), pin 3 the inners in the fixing hole of nozzle parent 4, pin 3 is fixed on nozzle parent 4 in the muzzle 1 on muzzle 1 wall.An annular seal groove is arranged on nozzle parent 4 outer walls, a sealing ring 2 is arranged in seal groove.
The anti-impact that is used for sour gas well is lost the downhole choke mouth, is installed in the afterbody of sulfur-bearing throttling instrument, plays throttling.Wherein, said muzzle 1 is the carrier of flow nipple; Sealing ring 2 mainly is arranged between muzzle 1 and the nozzle parent 4 and seals, and downhole gas can only be passed through from lining 1.Pin 3 plays the effect of fixed knot stem bar, and it can not come off in the process of going into the well.Nozzle parent 4, its inner passage are inlaid with the lining 5 that carbide alloy is processed.Nozzle parent 4 lower end external screw threads are baffle 6 fixedly.Lining 5 uses Hardmetal materials, and lining 5 has the effect of throttling, erosion resistance and hydrogen sulfide corrosion resistant.
Claims (2)
1. an anti-impact erosion downhole choke mouth that is used for sour gas well comprises muzzle (1), sealing ring (2), pin (3), nozzle parent (4) and lining (5); Muzzle (1) is the cylinder bodily form, and there is screw thread muzzle (1) upper end, and muzzle has centre bore in (1), and oriented projecting inward ring-shaped step in muzzle (1) centre bore is fixed with a nozzle parent (4) in the ring-shaped step lower end of muzzle (1) centre bore; It is characterized in that: described nozzle parent (4) is the cylinder bodily form, and nozzle parent (4) has centre bore, in nozzle parent (4) centre bore, adopts interference fit to be fixed with a lining (5); Lining (5) has centre bore, and the diameter of lining (5) centre bore is between 2～10mm; The equal in length of the length of lining (5) and nozzle parent (4); The material of lining (5) is a carbide alloy, and lining (5) adopts powder metallurgy process to process; On muzzle (1) lower end wall, radially screw is arranged; On nozzle parent (4) outer wall, fixing hole is arranged; The fixing hole of the radially screw of muzzle (1) and nozzle parent (4) is relative; On muzzle (1) wall, radially be fixed with pin (3) in the screw, pin (3) is inner in the fixing hole of nozzle parent (4), and pin (3) is fixed on nozzle parent (4) in the muzzle (1); On nozzle parent (4) outer wall, annular seal groove is arranged, sealing ring (2) is arranged in seal groove.
2. the anti-impact erosion downhole choke mouth that is used for sour gas well according to claim 1, it is characterized in that: nozzle parent (4) lower end outer wall has screw thread, is fixed with baffle (6) at the lower end screw thread of nozzle parent (4); Described baffle (6) is the cylinder bodily form, and there is internal thread the upper end of baffle (6), and there is parabola shaped centre bore baffle (6) lower end, and the upper end of the parabola shaped centre bore of baffle (6) is identical with the diameter of lining (5) centre bore.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202404548U CN202165063U (en) | 2011-07-08 | 2011-07-08 | Erosion resistant underground flow nipple for sour gas well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202404548U CN202165063U (en) | 2011-07-08 | 2011-07-08 | Erosion resistant underground flow nipple for sour gas well |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202165063U true CN202165063U (en) | 2012-03-14 |
Family
ID=45800898
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202404548U Expired - Lifetime CN202165063U (en) | 2011-07-08 | 2011-07-08 | Erosion resistant underground flow nipple for sour gas well |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202165063U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102242623A (en) * | 2011-07-08 | 2011-11-16 | 中国石油天然气股份有限公司 | Erosion-resistant downhole choke for sour gas well |
| CN105696972A (en) * | 2016-01-20 | 2016-06-22 | 中国石油化工股份有限公司 | Erosion-resistant sliding sleeve |
-
2011
- 2011-07-08 CN CN2011202404548U patent/CN202165063U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102242623A (en) * | 2011-07-08 | 2011-11-16 | 中国石油天然气股份有限公司 | Erosion-resistant downhole choke for sour gas well |
| CN105696972A (en) * | 2016-01-20 | 2016-06-22 | 中国石油化工股份有限公司 | Erosion-resistant sliding sleeve |
| CN105696972B (en) * | 2016-01-20 | 2018-03-30 | 中国石油化工股份有限公司 | A kind of erosion resistance sliding sleeve |
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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: 20120314 |