CN205154102U - Drilling rod floating valve - Google Patents
Drilling rod floating valve Download PDFInfo
- Publication number
- CN205154102U CN205154102U CN201520994439.0U CN201520994439U CN205154102U CN 205154102 U CN205154102 U CN 205154102U CN 201520994439 U CN201520994439 U CN 201520994439U CN 205154102 U CN205154102 U CN 205154102U
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- valve
- valve core
- core head
- valve body
- disk seat
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Abstract
The utility model discloses a drilling rod floating valve, including the disk seat body, the outside of the disk seat body is equipped with the external seal circle to and be located case and the clamping orient cover of the internal portion of disk seat, and the case includes valve core head and valve plug stem, the valve plug stem lower part is located the clamping orient cover, is equipped with reset spring between valve core head and clamping orient overlap, valve core head's upper portion is conical structure, and valve core head's lower tip is cylindrical structure, and just the width of this cylindrical structure is greater than the width of conical structure, the sealing rubber ring that the internal side of disk seat was equipped with the sealing ring base member and closely cooperated with this sealing ring base member, sealing rubber ring lies in the top of the cylindrical structure of tip under the valve core head, and the sealing rubber ring can form sealed of same horizontally with this cylindrical structure. The utility model discloses can keep the sealed effect that the floating valve is good, the thick liquid erosion -corrosion in the pit of difficult quilt, very big extension the life of floating valve, increased the factor of safety of floating valve.
Description
Technical field
The utility model relates to a kind of drilling rod floating valve, belongs to the supporting downhole tool of drilling technology in oil-gas mining field.
Background technology
In oil-gas mining process, down-hole pressure is very big, if misoperation or down-hole kit inapplicable, easily cause gas to gush accident.Once generation blowout, directly can threaten the life security of neighbouring staff, also can cause immeasurable loss to surrounding environment.So in oil-gas mining technique, the improvement of down-hole kit always is research emphasis.
Drilling rod floating valve is a kind of interior jet-preventing tool be widely used in oil and gas well drilling technique, and be generally connected on drill bit, it does not hinder the direct circulation of mud, is mainly used to the generation preventing well kick or blowout.When drilling rod is changed in termination of pumping, float valve can also prevent chip from returning from bit nozzle.Float valve can be categorized as arrow formula, hemispheric and valve plate type by its spool shape.Wherein, the valve plate in valve plate type drilling tool float valve is fixed on valve seat by a lateral springs, and when drilling fluid direct circulation, valve plate overcomes valve core reseting spring resistance, and float valve is opened, and drilling tool internal channel is unimpeded; But under the condition of work of high temperature, high pressure, high flow rate, very easily there is fatigue or inefficacy in spring, cause when drilling fluid direct circulation stops or overflow, well kick occur, drilling tool internal channel can not be closed in time and maybe cannot be closed, and even causes the generation of serious accident.
Arrow formula float valve is made up of valve body and spool, spool is made up of valve core head, valve core rod, spring and fairlead, the other end of valve core head is axially connected with valve core rod, fairlead to be enclosed within valve core rod and to be slidably matched with guide peg, spring housing is between valve core rod upper valve core head and fairlead, and fairlead is axially connected in the ring-shaped clamping sleeve on core body.It has, and stability in use is good, the advantage of easy accessibility, good airproof performance.
What existing arrow formula float valve sealing mechanism often adopted is rubber pad and valve base inner wall taper sealing, due to underground environment and slurries corrosion and wash away, valve base inner wall is also easy to corrosion, rubber seal face also easy wearing and tearing under the washing away of slurries simultaneously, thus cause sealing effectiveness to decline, easily cause potential safety hazard.
Summary of the invention
For solving the problem, the purpose of this utility model is to provide a kind of drilling rod floating valve improving sealing, by improving hermetically-sealed construction, reducing corrosion and the wearing and tearing of sealing surface, increasing sealing and the safety factor of float valve, to make up the deficiencies in the prior art.
For achieving the above object, the concrete technical scheme that the utility model is taked is:
A kind of drilling rod floating valve, comprise valve body, the outside of described valve body is provided with exterior seal ring, it is characterized in that, this float valve also comprises the spool and positioning and guiding cover that are positioned at valve body inside, and spool comprises valve core head and valve core rod, and valve core rod lower end part is in positioning and guiding cover, positioning and guiding cover is fixed on valve body, is provided with back-moving spring between valve core head and positioning and guiding overlap; The top of described valve core head is conical structure, and the bottom of valve core head is cylindrical structural, and the width of this cylindrical structural is greater than the width of conical structure; Be provided with inside described valve body joint ring matrix and with the close-fitting packer ring of sealing cyclic group body, described packer ring is positioned at the top of the cylindrical structural of valve core head bottom, and packer ring and this cylindrical structural can form the sealing surface of same level, adopt between joint ring matrix and valve body and be screwed.
The utility model is an arrow formula float valve, and spool comprises valve core head and valve core rod, and wherein valve core head is not only a conical structure, also comprises the cylindrical structural of bottom, avoiding problems the use of rubber pad; Valve core head coordinates with rubber ring and forms sealing surface, and this hermetically-sealed construction is not easily recycled mud erosion corrosion in creeping under normal well, can keep good sealing effectiveness, extends the application life of float valve greatly, too increases the safety factor of float valve simultaneously.
Accompanying drawing explanation
Fig. 1 is the utility model overall structure schematic diagram.
Wherein, 1-valve body, 2-exterior seal ring, 3-spool, 4-back-moving spring, 5-positioning and guiding cover, 6-joint ring matrix, 7-packer ring, 8-fixed screw.
Detailed description of the invention
The utility model is further illustrated below in conjunction with accompanying drawing and specific embodiment.
Drilling rod floating valve as shown in Figure 1, comprise valve body 1, the outside of described valve body 1 is provided with exterior seal ring 2, and be positioned at spool 3 and the positioning and guiding cover 5 of valve body 1 inside, spool 3 comprises valve core head and valve core rod, valve core rod lower end part is in positioning and guiding cover 5, and positioning and guiding cover 5 is fixed on valve body 1, and valve core head and positioning and guiding are provided with back-moving spring 4 between overlapping 5; The top of described valve core head is conical structure, and the bottom of valve core head is cylindrical structural, and the width of this cylindrical structural is greater than the width of conical structure; Joint ring matrix 6 and packer ring 7 close-fitting with sealing cyclic group body 6 is provided with inside described valve body 1, described packer ring 7 is positioned at the top of the cylindrical structural of valve core head bottom, and packer ring 7 and this cylindrical structural can form the sealing surface of same level, adopt screw 8 to fix between joint ring matrix 6 and valve body 1, better sealing effectiveness can be reached.
When above-mentioned float valve uses, valve body 1 outside is provided with exterior seal ring 2, float valve sealing can be arranged on the position of needs, when pressure acts on valve core head from top to bottom, spool 3 moves down, valve core rod slides in positioning and guiding cover 5, and the sealing surface that valve core head and packer ring 7 are formed disconnects, and achieves the unlatching of valve; When without normal pressure or when there is active force from the bottom to top, move on the promotion bottom spool head of back-moving spring 4 is rapid, valve core head and packer ring 7 form sealing surface again, the larger sealing surface of upward pressure is more difficult to disconnect, spool 3 achieves and being sealed and matched of valve body 1, and ensure that good sealing effectiveness.
Above-mentioned is enlightenment according to desirable embodiment of the present utility model, and by above-mentioned description, relevant staff in the scope not departing from this utility model technological thought, can carry out various change and amendment completely.This utility model is not limited to the content in manual, must determine its protection domain according to claim.
Claims (2)
1. a drilling rod floating valve, comprise valve body (1), the outside of described valve body (1) is provided with exterior seal ring (2), it is characterized in that, this float valve also comprises the spool (3) and positioning and guiding cover (5) that are positioned at valve body (1) inside, and described spool (3) comprises valve core head and valve core rod, and valve core rod bottom is positioned at positioning and guiding cover (5), positioning and guiding cover (5) is fixed on valve body (1), is provided with back-moving spring (4) between described valve core head and positioning and guiding cover (5); The top of described valve core head is conical structure, and the bottom of valve core head is cylindrical structural, and the width of this cylindrical structural is greater than the width of conical structure; Described valve body (1) inner side be provided with joint ring matrix (6) and with sealing cyclic group body (6) close-fitting packer ring (7), described packer ring (7) is positioned at the top of the cylindrical structural of valve core head bottom, and packer ring (7) and this cylindrical structural can form the sealing surface of same level.
2. drilling rod floating valve as claimed in claim 1, is characterized in that, adopts screw (8) to fix between described joint ring matrix (6) and valve body (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520994439.0U CN205154102U (en) | 2015-12-05 | 2015-12-05 | Drilling rod floating valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520994439.0U CN205154102U (en) | 2015-12-05 | 2015-12-05 | Drilling rod floating valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205154102U true CN205154102U (en) | 2016-04-13 |
Family
ID=55689810
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520994439.0U Active CN205154102U (en) | 2015-12-05 | 2015-12-05 | Drilling rod floating valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205154102U (en) |
-
2015
- 2015-12-05 CN CN201520994439.0U patent/CN205154102U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |