CN2413022Y - double-acting check valve - Google Patents
double-acting check valve Download PDFInfo
- Publication number
- CN2413022Y CN2413022Y CN 00206000 CN00206000U CN2413022Y CN 2413022 Y CN2413022 Y CN 2413022Y CN 00206000 CN00206000 CN 00206000 CN 00206000 U CN00206000 U CN 00206000U CN 2413022 Y CN2413022 Y CN 2413022Y
- Authority
- CN
- China
- Prior art keywords
- mandrel
- protective sleeve
- sealing
- shell
- sealing drum
- 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
Links
- 238000007789 sealing Methods 0.000 claims abstract description 36
- 230000001681 protective effect Effects 0.000 claims abstract description 23
- 239000002184 metal Substances 0.000 abstract description 3
- 238000009530 blood pressure measurement Methods 0.000 abstract description 2
- 239000012530 fluid Substances 0.000 description 7
- 238000005553 drilling Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
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- Safety Valves (AREA)
Abstract
The double-acting check valve consists of a shell, a sealing barrel, a mandrel and a protective sleeve, wherein the sealing barrel is arranged in the inner cavity of the shell, a spring seat is connected to the lower end of the sealing barrel in a threaded manner, and the protective sleeve, a small spring, a check ring and a large spring are sequentially arranged between the sealing barrel and the mandrel from top to bottom. The double-seal pressure-measuring device has the advantages of high double-seal reliability, high pressure resistance, long service life of the body, convenience in replacement of easily-damaged parts due to the fact that the O-shaped ring is provided with the protective sleeve, pressure measurement and important use value for well control operation due to the fact that special metal inclined surface sealing and O-shaped sealing ring sealing are adopted.
Description
The utility model relates to a kind of double acting ball-and-seat, is mainly used in the Petroleum Exploration Engineering.
In the oil drilling engineering,, need in drilling tool, be provided with the device of preventing fluid to flow from bottom to top in order to prevent blowout and to be convenient to the control of drilling rod internal pressure.
Prior art constructions is seen Fig. 2, is to adopt cock 18 to be contained in kelly bar two ends up and down, and cock is a globe valve.Its weak point is: processing request is high and difficulty is big; On-off ratio is difficulty; Withstand voltage degree is poor, can not satisfy supporting needs.
Prior art is to adopt cock 18 to be contained in kelly bar two ends up and down.The structure of cock is seen Fig. 2 and Fig. 3, mainly is made up of body 21, fixed cover 23 and spherical valve cylinder 25.Clamp 22 and jump ring 27 are housed on the fixed cover, and the globe valve wound packages is in the spherical arc of fixed cover and ball seat 26, and piece number 24 is an O-ring seals, and piece number 20 is turned round for switch, and piece number 19 is a passage.Its weak point is: spherical valve cylinder and spherical arc difficulty of processing are big; On-off ratio is difficulty; Voltage endurance capability is poor.
The purpose of this utility model is to overcome above-mentioned weak point of the prior art and provides that a kind of voltage endurance capability is big, difficulty of processing is less and the double acting ball-and-seat of long service life.
The purpose of this utility model can reach by following measure: the utility model is made up of shell, sealing drum, mandrel and protective sleeve; shell inner cavity is equipped with sealing drum; sealing drum lower end screw thread is connected with spring base; between sealing drum and the mandrel, protective sleeve, little spring, back-up ring and big spring are housed successively from top to bottom.
There is reaming at the shell middle part.
There is inclined hole at the sealing drum middle part.
There is main O-ring seals mandrel and protective sleeve upper end for taper between mandrel and the protective sleeve.
Sealing drum is threadedly connected in the shell, between sealing drum boss and the shell seam O-ring seals is arranged.
There is guide rail the mandrel lower end.
Outer casing underpart has control pin and pressure tap.
The drawing of accompanying drawing is described as follows:
Fig. 1 always schemes for broken section of the present utility model.
Fig. 2 is the sectional view of prior art.
Fig. 3 is A-A sectional view of Fig. 2.
The accompanying drawing piece number is represented:
1, shell 2, O-ring seals 3, sealing drum 4, mandrel
5, main O-ring seals 6, protective sleeve 7, little spring 8, back-up ring
9, big spring 10, spring base 11, control pin 12, guide rail
13, pressure tap 14, O-ring seals 15, passage 16, inclined hole
17, awl end 18, cock 19, passage 20, switch are turned round
21, body 22, clamp 23, fixed cover 24, O-ring seals
25, spherical valve cylinder 26, ball seat 27, jump ring
The utility model is described in further detail below in conjunction with embodiment and accompanying drawing:
Fig. 1 represents structure of the present utility model, and mainly by shell 1, sealing drum 3, mandrel 4 and protective sleeve 6 are formed, and the boss of sealing drum upper end is installed on the seam of shell inner cavity, and there is O-ring seals 2 centre, and sealing drum is threadedly connected in the shell.There is inclined hole 16 at the sealing drum middle part.Mandrel is equipped with at the center of sealing drum inner chamber; mandrel is outer to be equipped with protective sleeve 6 with the level by main O-ring seals 5 sealing shrouds; mandrel and protective sleeve upper end is awl end 17, carries out cone seal when rising to the conical surface in the contact seal tube in order to protective sleeve together with mandrel.Between protective sleeve 6 and the back-up ring 8 little spring 7 is arranged, the step surface of protective sleeve touches the seam that pushes away mandrel top.There is reaming at the shell middle part, makes and forms passage 15 between shell and the sealing drum.The sealing drum lower end spring base 10 that is threaded has big spring 9 between back-up ring and the spring base.Like this, between mandrel and the sealing ring, protective sleeve, little spring, back-up ring, big spring and spring base are housed successively from top to bottom.Guide rail 12 is arranged at the mandrel bottom, at outer casing underpart control pin 11 is housed, and packs in the guide rail 12 in control pin the inner.Outer casing underpart also has pressure tap 13, needs fashionable dress upward pressure table with pressure measurement.Piece number 14 is an O-ring seals.
During use, the utility model is contained in about the kelly bar, can make mandrel rest on the position of unlatching with rotating the control pin, can make at any time when needing and move sealing on the mandrel, it so sealability is strong, can reach 70Mpa with particulate metal sealing and O shape sealing effect simultaneously.Protective sleeve is installed, can be made the O-ring seals life-saving, and change consumable accessory easily.Under have pressure tap when closing well, to load onto pressure meter, directly measure the pressure in the drilling rod, operation brings a lot of convenience to well control for this.When the utility model is contained on the down-hole equipment, can utilize the turn on pump termination of pumping to carry out switch, can measure downhole fluid pressure from well head, going down process both can have been opened also and can close.
When circulating mud, fluid is depressed into position as shown in Figure 1 with mandrel together with protective sleeve downwards, and fluid flows to the bottom from passage 15.During blowout, fluid upwards flows, and under fluid and spring force effect, protective sleeve seals together with mandrel rises to conical surface contact, in case the fluid stopping body upwards flows and reaches the purpose that prevents blowout.
The utility model contrast prior art has following advantage:
With the sealing of particulate metal inclined-plane and O-ring seals sealing, dual-seal good reliability; The voltage endurance capability height; Do not need When closing, but Artificial Control is in opening for a long time; The body long service life, O shape circle has protective sleeve, uses Life-span is long, and consumable accessory is convenient to change; Pressure tap is arranged, and the pressure that needs the fashionable dress pressure gauge can directly observe in the drilling tool becomes Change, operation has important use value to well control.
Claims (7)
1, a kind of double acting ball-and-seat is characterized in that, is made up of shell, sealing drum, mandrel and protective sleeve; shell inner cavity is equipped with sealing drum; sealing drum lower end screw thread is connected with spring base, between sealing drum and the mandrel, protective sleeve, little spring, back-up ring and big spring is housed successively from top to bottom.
2, double acting ball-and-seat according to claim 1 is characterized in that, there is reaming at the shell middle part.
3, double acting ball-and-seat according to claim 1 is characterized in that, there is inclined hole at the sealing drum middle part.
4, double acting ball-and-seat according to claim 1 is characterized in that, there is main O-ring seals mandrel and protective sleeve upper end for taper between mandrel and the protective sleeve.
5, double acting ball-and-seat according to claim 1 is characterized in that, sealing drum is threadedly connected in the shell, between sealing drum boss and the shell seam O-ring seals is arranged.
6, double acting ball-and-seat according to claim 1 is characterized in that, there is guide rail the mandrel lower end.
7, double acting ball-and-seat according to claim 1 is characterized in that, outer casing underpart has control pin and pressure tap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00206000 CN2413022Y (en) | 2000-02-29 | 2000-02-29 | double-acting check valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00206000 CN2413022Y (en) | 2000-02-29 | 2000-02-29 | double-acting check valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2413022Y true CN2413022Y (en) | 2001-01-03 |
Family
ID=33574066
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00206000 Expired - Fee Related CN2413022Y (en) | 2000-02-29 | 2000-02-29 | double-acting check valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2413022Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110566153A (en) * | 2019-09-26 | 2019-12-13 | 中海油能源发展股份有限公司工程技术分公司 | reservoir protection device capable of being opened in two directions |
-
2000
- 2000-02-29 CN CN 00206000 patent/CN2413022Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110566153A (en) * | 2019-09-26 | 2019-12-13 | 中海油能源发展股份有限公司工程技术分公司 | reservoir protection device capable of being opened in two directions |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |