CN2916119Y - Automatic safety switch for oil gas well - Google Patents
Automatic safety switch for oil gas well Download PDFInfo
- Publication number
- CN2916119Y CN2916119Y CN 200620085156 CN200620085156U CN2916119Y CN 2916119 Y CN2916119 Y CN 2916119Y CN 200620085156 CN200620085156 CN 200620085156 CN 200620085156 U CN200620085156 U CN 200620085156U CN 2916119 Y CN2916119 Y CN 2916119Y
- Authority
- CN
- China
- Prior art keywords
- valve body
- valve
- gas well
- safety switch
- valve base
- 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 relates to an automatic safety switch for oil gas well, which comprises a columnar cylinder with a inner chamber, a upper joint and a lower support body. The upper joint is connected with the upper part of the cylinder inner chamber through screw threads. The lower support body is connected with the lower part of the cylinder inner chamber through screw threads. A positioning device is arranged in the cylinder. An upper spring seat and an upper valve seat are arranged between the upper joint and the positioning device. A through hole is arranged on the upper spring seat and upper valve seat. A lower valve seat is arranged on the lower support body where a through hole is also positioned. A valve body is arranged in the cylinder body between the lower and upper valve seats. An upper spring is arranged between the valve body and the upper spring seat. A lower spring is arranged between the valve body and the lower spring seat. The arrangement of the double-way valve body and the upper and lower springs makes the valve suspend in the right position to provide right space between the upper and lower valve seats. The double-way open and shut of the valve is controlled by the oil gas through the space, thus realizing non-human control and operation safety and reliability.
Description
Technical field
The utility model relates to a kind of downhole safety device that the oil gas well is produced that is used for, and specifically, relates to a kind of automatic safety switch for oil and gas well.
Background technology
At present, use many oil gas well safety devices and generally be hydraulically-controlled type blowing oil gas well safety device by external import, during use, it is installed in the flow string below well head 100m, it when nonproductive normally off, only connect power supply on ground, just can open when beginning to produce, when ground stopping production or power failure, then can close automatically, this hydraulically-controlled type blowing oil gas well safety device must be equipped with complicated electrohydraulic control system and the executive system of a cover, the cost height, and having reduced reliability, in a single day system breaks down, and will bring many safety problems.
The utility model content
The purpose of this utility model provide a kind of simple in structure, cost is low, safe and reliable, a kind of automatic safety switch for oil and gas well of being independent of well head system.
For achieving the above object, the technical scheme that the utility model adopted is: a kind of automatic safety switch for oil and gas well, comprise cylindrical barrel body with inner chamber, top connection, lower support, described top connection is threaded with the upper end of cylinder lumen, described lower support is threaded with the lower end of cylinder lumen, it is characterized in that: be provided with positioner in the described cylindrical shell, be provided with upper spring seat between described top connection and the positioner, upper valve base, described upper spring seat, upper valve base has through hole, the upside of described lower support is provided with lower valve base, described lower valve base has through hole, described lower valve base, be provided with valve body in the cylindrical shell between the upper valve base, be provided with upper spring between described valve body and the upper spring seat, be provided with lower spring between described valve body and the lower valve base.
Below be improvement of the technical scheme:
The positioner that is provided with in the described cylindrical shell is a step.
The upper end of described valve body is provided with sealing surface, and the bottom of described valve body is provided with lower sealing surface, and described upper valve base has the sealing surface that matches with last sealing surface, and described lower valve base has the sealing surface that matches with lower sealing surface.
The last sealing surface of described valve body, lower sealing surface are the taper abradant surface.
The upper end of described valve body is provided with the upper limit step that limits the upper spring position, and the described downside of going up sealing surface is provided with the lower limit step that limits the lower spring position.
The bottom of described valve body is provided with current divider, and the inner chamber of described current divider and lower valve base forms passage.
The lower contact that has been threaded of described lower support, described lower contact has through hole.
Be provided with the lower screen cloth of band sieve aperture between described lower contact and the lower support, described upper spring seat is provided with the upper screen cloth of band sieve aperture.
Be provided with sealing ring between described top connection and the cylindrical shell, be provided with sealing ring between described lower support and the cylindrical shell, be provided with upper sealing ring between described top connection and the upper spring seat, be provided with lower sealing ring between described upper spring seat and the upper valve base, be provided with sealing ring between described lower support and the lower contact.
Beneficial effect: the utility model adopts above technical scheme, has the following advantages:
1) setting of two-way valve body and upper and lower spring makes valve body be suspended in position accurately, and forms gap accurately between the upper and lower valve seat, and the two-way open and close by the oil gas application valve body that passes through this gap do not need artificial control, and are safe and reliable.
2) this switch adopts structure open in usual, can guarantee in the installation process under the kill-job state, or stop adopting in the well for a long time, and therefore sand setting can, can not cause sand plug or sand card because sand setting buries valve by the valve clearance shaft bottom that falls back.
3) setting of upper screen cloth, lower screen cloth can prevent that the foreign matter of big grain from entering valve pocket, has improved the reliability of switch.
Of the present utility model relatively simple for structure, reliable operation has higher market popularization value.The utility model is described in further detail below in conjunction with drawings and Examples.
Description of drawings
Accompanying drawing 1 is the structural representation of the utility model embodiment;
Accompanying drawing 2 is structural representations of valve body among the utility model embodiment;
Accompanying drawing 3 is that A in the accompanying drawing 2 is to schematic diagram.
The specific embodiment
Embodiment: as shown in Figure 1; a kind of automatic safety switch for oil and gas well; comprise cylindrical barrel body 3 with inner chamber; top connection 1; lower support 12; described top connection 1 is threaded with the upper end of cylindrical shell 3 inner chambers; be provided with sealing ring 2 between described top connection 1 and the cylindrical shell 3; be provided with step 21 in the described cylindrical shell 3; be provided with upper spring seat 5 between described top connection 1 and the step 21; upper valve base 8; described upper spring seat 5 is provided with the upper screen cloth 17 of band sieve aperture; described upper spring seat 5; upper valve base 8 has through hole; be provided with upper sealing ring 4 between described top connection 1 and the upper spring seat 5; be provided with lower sealing ring 7 between described upper spring seat 5 and the upper valve base 8; described upper valve base 8 has the taper surface of grinding; described lower support 12 is threaded with the lower end of cylindrical shell 3 inner chambers; be provided with sealing ring 16 between described lower support 12 and the cylindrical shell 3; the upside of described lower support 12 is provided with lower valve base 11; described lower valve base 11 has through hole; the upper end of described lower valve base 11 has the taper surface of grinding; described lower valve base 11; be provided with valve body 9 in the cylindrical shell 3 between the upper valve base 8; as shown in Figure 2; described valve body 9 upper ends are provided with sealing surface 23 in the taper of grinding; the bottom of described valve body 9 is provided with the taper lower sealing surface 25 of grinding; the upper end of described valve body 9 is provided with the upper limit step 22 that limits upper spring 6 positions; the described downside of going up sealing surface 23 is provided with the lower limit step 24 that limits lower spring 10 positions; the bottom of described valve body 9 is provided with current divider 26; as shown in Figure 3; described current divider 26 forms passage 27 with the inner chamber of lower valve base 11; be provided with upper spring 6 between the upper limit step 22 of described valve body 9 and the upper spring seat 5; be provided with lower spring 10 between the lower limit step 24 of described valve body 9 and the lower valve base 11; the lower contact 15 that has been threaded of described lower support 12; described lower contact 15 has through hole, is provided with sealing ring 14 between described lower support 12 and the lower contact 15, is provided with the lower screen cloth 18 of band sieve aperture between described lower contact 15 and the lower support 12; during use; safety switch and other protective device are connected below the two-way packer of relevant pressure, under the kill-job state, by means of giving up; be placed in more than the oil-gas Layer; through replacing liquid; after the induced flow, this safety switch is just in running order, during normal gas production; valve body 9 is in quick condition; as long as the aerogenesis flow is not more than the maximum limit constant flow of switch, switch always is in opening, carries out ordinary production; when well head is out of control; the oil gas flow increases suddenly between valve clearance, and valve body 9 produces very big pressure reduction up and down, under the acting in conjunction of gas shock and pressure reduction; the pressure rising that valve body 9 overcomes upper spring 6 enters in the upper valve base 8; contact formation with upper valve base 8 and be tightly connected, hermetically closing stops aerogenesis; finish shaft mouth operation; close well head tight after 3～5 hours, because the various rational seepages in valve body 9 front and back make the pressure of valve body about in the of 9 near balance; valve body 9 is under the effect of upper spring 6 and deadweight; automatically fall after rise, return to normal, can return to normal production; also can in well, add pressure than ground floor height 1～2MPa; and kept 10 minutes, can resume production soon, during well-flushing; if because of leakage takes place greater than gas-bearing formation pressure in flushing fluid pressure; liquid will flow to the low pressure layer by valve in the well, produce pressure reduction before and after the valve clearance of 11 of valve body 9 and lower valve bases, under differential pressure action; valve body 9 whereabouts contact with lower valve base 11 to form and are tightly connected; hermetically closing prevents liquid descending, can prevent the consumption to the pollution on stratum and unnecessary flushing fluid.
Claims (9)
1, a kind of automatic safety switch for oil and gas well, comprise cylindrical barrel body (3) with inner chamber, top connection (1), lower support (12), described top connection (1) is threaded with the upper end of cylindrical shell (3), described lower support (12) is threaded with the lower end of cylindrical shell (3), it is characterized in that: described cylindrical shell is provided with positioner in (3), be provided with upper spring seat (5) between described top connection (1) and the positioner, upper valve base (8), described upper spring seat (5), upper valve base (8) has through hole, the upside of described lower support (12) is provided with lower valve base (11), described lower valve base (11) has through hole, described lower valve base (11), be provided with valve body (9) in the cylindrical shell (3) between the upper valve base (8), be provided with upper spring (6) between described valve body (9) and the upper spring seat (5), be provided with lower spring (10) between described valve body (9) and the lower valve base (11).
2, a kind of automatic safety switch for oil and gas well as claimed in claim 1 is characterized in that: the positioner that is provided with in the described cylindrical shell (3) is step (21).
3, a kind of automatic safety switch for oil and gas well as claimed in claim 1 or 2, it is characterized in that: the upper end of described valve body (9) is provided with sealing surface (23), the bottom of described valve body (9) is provided with lower sealing surface (25), described upper valve base (8) has the sealing surface that matches with last sealing surface (23), and described lower valve base (11) has the sealing surface that matches with lower sealing surface (25).
4, a kind of automatic safety switch for oil and gas well as claimed in claim 3 is characterized in that: the last sealing surface (23) of described valve body (9), lower sealing surface (25) are the taper abradant surface.
5, a kind of automatic safety switch for oil and gas well as claimed in claim 4, it is characterized in that: the upper end of described valve body (9) is provided with the upper limit step (22) that limits upper spring (6) position, and the described downside of going up sealing surface (23) is provided with the lower limit step (24) that limits lower spring (10) position.
6, a kind of automatic safety switch for oil and gas well as claimed in claim 5 is characterized in that: the bottom of described valve body (9) is provided with current divider (26), and described current divider (26) forms passage (27) with the inner chamber of lower valve base (11).
7, a kind of automatic safety switch for oil and gas well as claimed in claim 6 is characterized in that: described lower support (12) lower contact (15) that has been threaded, described lower contact (15) has through hole.
8, a kind of automatic safety switch for oil and gas well as claimed in claim 7 is characterized in that: be provided with the lower screen cloth (18) of band sieve aperture between described lower contact (15) and the lower support (12), described upper spring seat (5) is provided with the upper screen cloth (17) of band sieve aperture.
9, a kind of automatic safety switch for oil and gas well as claimed in claim 8, it is characterized in that: be provided with sealing ring (2) between described top connection (1) and the cylindrical shell (3), be provided with sealing ring (16) between described lower support (12) and the cylindrical shell (3), be provided with upper sealing ring (4) between described top connection (1) and the upper spring seat (5), be provided with lower sealing ring (7) between described upper spring seat (5) and the upper valve base (8), be provided with sealing ring (14) between described lower support (12) and the lower contact (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620085156 CN2916119Y (en) | 2006-06-06 | 2006-06-06 | Automatic safety switch for oil gas well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620085156 CN2916119Y (en) | 2006-06-06 | 2006-06-06 | Automatic safety switch for oil gas well |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2916119Y true CN2916119Y (en) | 2007-06-27 |
Family
ID=38187028
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620085156 Expired - Lifetime CN2916119Y (en) | 2006-06-06 | 2006-06-06 | Automatic safety switch for oil gas well |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2916119Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100449112C (en) * | 2006-06-06 | 2009-01-07 | 山东顺兴机械有限公司 | Automatic safety switch for oil and gas well |
| CN102650199A (en) * | 2011-02-23 | 2012-08-29 | 新疆华油油气工程有限公司 | Bidirectional pressure control circulating valve |
-
2006
- 2006-06-06 CN CN 200620085156 patent/CN2916119Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100449112C (en) * | 2006-06-06 | 2009-01-07 | 山东顺兴机械有限公司 | Automatic safety switch for oil and gas well |
| CN102650199A (en) * | 2011-02-23 | 2012-08-29 | 新疆华油油气工程有限公司 | Bidirectional pressure control circulating valve |
| CN102650199B (en) * | 2011-02-23 | 2015-07-15 | 新疆华油油气工程有限公司 | Bidirectional pressure control circulating valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Effective date of abandoning: 20090107 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |