CN203655236U - High differential pressure switchable square kelly plug valve - Google Patents
High differential pressure switchable square kelly plug valve Download PDFInfo
- Publication number
- CN203655236U CN203655236U CN201420003196.5U CN201420003196U CN203655236U CN 203655236 U CN203655236 U CN 203655236U CN 201420003196 U CN201420003196 U CN 201420003196U CN 203655236 U CN203655236 U CN 203655236U
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- valve
- valve base
- plug
- base
- lower valve
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Abstract
Disclosed is a high differential pressure switchable square kelly plug valve. The plug valve relates to the field of petroleum machinery. The plug valve comprises a plug body (1), a turn button (2) and a valve ball (3). The valve ball (3) is fixed to the valve body (1) through an upper valve base (4) and a lower valve base (5). A waveform spring (6) sleeves the lower valve base (5). The upper valve base (4) and the lower valve base (5) are each provided with an annular sealing part (7) that is contacted with the valve ball (3) through an inner edge. The lower valve base (5) is not integrated with the annular sealing part (7), but threadingly connected to the annular sealing part (7). The waveform spring (6) is abutted against the outer end of the annular sealing part (7) of the lower valve base (5). The plug valve is advantaged by being simple in structure, reliable in sealing and small in open torque. When an inner pressure of a drilling tool reaches 35MPa, the plug valve can be manually opened, so that the plug valve can be rapidly closed manually under the conditions of overflow and well kick with 35 MPa stand pipe pressure. Thus, reliability of blowout prevention operation inside a well head and safety of well head operations are improved.
Description
Technical field
The utility model relates to petroleum machinery, and being specifically related to a kind of High Pressure Difference can switch kelly cock.
Background technology
Kelly cock as jet-preventing tool in a kind of important drilling tool, in drilling and repairing well, become indispensability.Common kelly cock is metallic elastic valve base sealing structure, adopts this sealing means of float ball ball valve, between spheroid and upper and lower valve seat, adopts two-way hard seal.Between valve seat and spheroid, do not form gap, contact surface is larger, so its frictional force is very large.When work, when closing after kelly cock, the sealed fluid pressure of valve ball is pushed upper valve base to and is compressed and maintenance sealing; Meanwhile, lower valve base, under the effect of spring force and fluid pressure, also compresses with valve ball and keeps sealing.Therefore, kelly cock hermetically-sealed construction has lower valve base and upper valve base dual face seals performance.Because the friction factor between metal hard-sealing face is larger.So the kelly cock valve seal of this hermetically-sealed construction is reliable.But opening and closing moment is very large.Therefore, there iing under pressure condition operation very difficult.
Summary of the invention
Technical problem to be solved in the utility model is: for the problems referred to above, provide a kind of High Pressure Difference of improving structure can switch kelly cock, having the very difficult defect of operation under pressure condition to solve common kelly cock.
Technical solution of the present utility model is: it comprises valve body, knob and valve ball, valve ball is fixed in valve body by upper valve base and lower valve base, on lower valve base, cover has wavy spring, described upper valve base and lower valve base are equipped with an annular seal and described valve ball passes through inner side edge angular contact, lower valve base and its annular seal be Split type structure and be threaded connection, and described wavy spring is against the outboard end of lower valve base annular seal.
Technique effect of the present utility model is: it have advantages of simple in structure, sealing is reliable and it is little to open moment.In the 35MPa situation that builds the pressure, realize artificial unlatching in drilling tool, manually quick closedown in the situation while realizing overflow, well kick below standpipe pressure 35MPa.The reliability of blowout prevention operation in well head and the safety of well head operation are improved.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model.
Detailed description of the invention
As shown in Figure 1, it comprises valve body 1, knob 2 and valve ball 3, valve ball 3 is fixed in valve body 1 by upper valve base 4 and lower valve base 5, on lower valve base 5, cover has wavy spring 6, described upper valve base 4 and lower valve base 5 are equipped with an annular seal 7 and pass through inner side edge angular contact with described valve ball 3, lower valve base 5 is with its annular seal 7 for Split type structure and be threaded connection, and described wavy spring 6 is against the outboard end of lower valve base 5 annular seal 7.Between upper valve base 4 and lower valve base 5 and body 1 inwall, seal by seal.
Described upper valve base 4 is Split type structure and is threaded connection with its annular seal 7.
Described knob 2 cover between the shoulder of inner side and valve body 1 inwall has sliding thrust bearing 8.
Be that φ 168, internal diameter are that the special lower kelly cock of T that φ 71.4, pressure rank are 70MPa carries out unlatching evidence with pressure to external diameter: be below 27MPa time at pressure reduction, the spanner that is 600mm with the arm of force, an artificial people easily opens.Pressure reduction in the time of 27MPa～35MPa, the spanner that is 1200mm with the arm of force, an artificial people can open smoothly.While closing due to plug valve, sealing pair bears the effect of maximum differential pressure and pretightning force, so, in plug valve opening-closing process, open moment and be greater than and close moment.Therefore, system pressure is 35MPa when following (plug valve boosts in fully open position), is the spanner of 600mm, 1200mm with the arm of force, manually can easily close.After unlatching test with pressure, carry out hydrostatic test by API Spec7-1 standard, sealing performance is good.
Claims (3)
1. High Pressure Difference can switch kelly cock, comprise valve body (1), knob (2) and valve ball (3), valve ball (3) is fixed in valve body (1) by upper valve base (4) and lower valve base (5), the upper cover of lower valve base (5) has wavy spring (6), it is characterized in that, described upper valve base (4) and lower valve base (5) are equipped with an annular seal (7) and pass through inner side edge angular contact with described valve ball (3), lower valve base (5) is Split type structure with its annular seal (7) and is threaded connection, described wavy spring (6) is against the outboard end of lower valve base (5) annular seal (7).
2. High Pressure Difference as claimed in claim 1 can switch kelly cock, it is characterized in that, described upper valve base (4) with its annular seal (7) for Split type structure and be threaded connection.
3. High Pressure Difference as claimed in claim 1 can switch kelly cock, it is characterized in that, described knob (2) cover between the shoulder of inner side and valve body (1) inwall has sliding thrust bearing (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420003196.5U CN203655236U (en) | 2014-01-04 | 2014-01-04 | High differential pressure switchable square kelly plug valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420003196.5U CN203655236U (en) | 2014-01-04 | 2014-01-04 | High differential pressure switchable square kelly plug valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203655236U true CN203655236U (en) | 2014-06-18 |
Family
ID=50921636
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420003196.5U Withdrawn - After Issue CN203655236U (en) | 2014-01-04 | 2014-01-04 | High differential pressure switchable square kelly plug valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203655236U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103742106A (en) * | 2014-01-04 | 2014-04-23 | 黑龙江北方双佳钻采机具有限责任公司 | Openable kelly cock valve with high pressure difference |
| CN106837222A (en) * | 2017-02-15 | 2017-06-13 | 西南石油大学 | It is a kind of to collect the kelly cock for manually and automatically operating in one |
-
2014
- 2014-01-04 CN CN201420003196.5U patent/CN203655236U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103742106A (en) * | 2014-01-04 | 2014-04-23 | 黑龙江北方双佳钻采机具有限责任公司 | Openable kelly cock valve with high pressure difference |
| CN103742106B (en) * | 2014-01-04 | 2016-07-06 | 黑龙江北方双佳钻采机具有限责任公司 | The switchable kelly cock of High Pressure Difference |
| CN106837222A (en) * | 2017-02-15 | 2017-06-13 | 西南石油大学 | It is a kind of to collect the kelly cock for manually and automatically operating in one |
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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 |
Granted publication date: 20140618 Effective date of abandoning: 20160706 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |