CN205689172U - arrow-shaped check valve - Google Patents

arrow-shaped check valve Download PDF

Info

Publication number
CN205689172U
CN205689172U CN201620620301.9U CN201620620301U CN205689172U CN 205689172 U CN205689172 U CN 205689172U CN 201620620301 U CN201620620301 U CN 201620620301U CN 205689172 U CN205689172 U CN 205689172U
Authority
CN
China
Prior art keywords
valve
spline
arrow
flechette
hole
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
Application number
CN201620620301.9U
Other languages
Chinese (zh)
Inventor
邓福成
江友亮
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Yangtze University
Original Assignee
Yangtze University
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Yangtze University filed Critical Yangtze University
Priority to CN201620620301.9U priority Critical patent/CN205689172U/en
Application granted granted Critical
Publication of CN205689172U publication Critical patent/CN205689172U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Abstract

This utility model provides a kind of arrow-shaped check valve, including the upper valve body interconnected and lower valve body, is provided with through hole, is sequentially provided with taper surface and the first spline surface in the bottom of through hole in upper valve body;Being provided with valve body flechette-type spool in axial sliding under edge in lower valve body, flechette-type spool top is correspondingly provided with and seals, with taper surface, the frustum coordinated, and seals, with the first spline surface, the second spline surface coordinated.A kind of arrow-shaped check valve that this utility model provides, by using the structure of spline surface, on the premise of not increasing stroke and external diameter, increases area of passage and exceedes 1.5 ~ 2 times of original area of passage.The assembled scheme that the taper surface used coordinates with spline surface, improve sealing effectiveness, in particular by the program, without arranging extra sealing member, the structures such as the sealing ring of such as quality of rubber materials, sealing drum, thus avoid the sealing member problem by high-pressure slurry Fast Wearing, improve the service life of arrow-shaped check valve.

Description

Arrow-shaped check valve
Technical field
This utility model relates to the field of tool of oil, natural gas extraction, drilling well, a kind of flechette-type for drilling tool Check-valves.
Background technology
When drilling platforms drilling well works, complicated and changeable due to stratum, drilling process usually can run into stratum high pressure Fluid, is possible to well kick or blowout without reliable spraying-preventing system, affects drillng operation safety and drilling efficiency. Arrow-shaped check valve is the jet-preventing tool in kind of drill string, is connected in drill string, when running into high-pressure oil-gas layer and upwards pushing up pressure, can drive Flechette-type spool moves up and valve seat gluing, sealing, closes drill string internal channel, prevents blowout and well kick.In prior art, flechette-type is only The shortcoming returning valve is:
1, exist due to the pressure cap for fixed valve base, limit the passage of drilling fluid, reduce the mistake of arrow-shaped check valve Flow area, produces bigger resistance, and the pressure drop making mud is relatively big, wastes energy, affects drilling efficiency.
2, be used on flechette-type spool the rubber circle that seals under the effect of high-voltage high-speed fluid easy wear out failure or Come off, affect the sealing effectiveness of flechette-type spool.
3, fluctuating due to the force value of drilling fluid, the spring of flechette-type spool is being beated when normal work always, this Have impact on the life-span of spring, the most unfavorable to well control operation.
Chinese patent literature CN 203362113 U discloses a kind of arrow-shaped check valve, by flechette-type spool and valve seat Hard alloy sealing shroud is set, improves short problem in service life, but structure is complex, and the most unresolved area of passage The problem that little and flechette-type spool is beated.
Chinese patent literature CN 102635329 A discloses a kind of Novel double-seal arrow-shaped check valve, the rubber tube of setting Sealing effectiveness can be improved, increase the service life.Valve seat and pressure cap are integrated into upper valve body, expand fluid passage.Employ Less O-ring seals.But fluid passage still suffers from the problem that pressure drop is bigger.The rubber tube arranged is in the effect of high-pressure slurry Under, abrasion is very fast, quickly loses the effect of sealing.The safe snap ring arranged is due to fault of construction, when there is well kick or blowout, Safe snap ring is easily by locked for flechette-type spool, it is difficult to disengage.
Summary of the invention
Technical problem to be solved in the utility model is to provide a kind of arrow-shaped check valve, it is possible to increase area of passage, fall Lower resistance, improves sealing effectiveness, increases the service life, in preferred scheme, it is possible to avoid in the course of the work, flechette-type spool The problem beated.
For solving above-mentioned technical problem, this utility model be the technical scheme is that a kind of arrow-shaped check valve, including mutually The upper valve body being connected and lower valve body, be provided with through hole in upper valve body, be sequentially provided with taper surface and the first spline in the bottom of through hole Face;
Being provided with valve body flechette-type spool in axial sliding under edge in lower valve body, flechette-type spool top is correspondingly provided with and taper surface Seal the frustum coordinated, seal, with the first spline surface, the second spline surface coordinated.
Preferably in scheme, it is protruding or recessed that the inwall of the described through hole that the first spline surface is cylindricality is provided with multiple arc-shaped Fall into.
Preferably in scheme, the described outer wall that the second spline surface is cylindroid is provided with multiple arc-shaped depression or protruding.
Preferably in scheme, it is provided with chamfering or rounding in the first spline surface and the second spline surface upper end.
Preferably in scheme, being additionally provided with base in lower valve body, base center is provided with pilot hole, and the bottom of flechette-type spool sets Having undergauge section, undergauge section to slide in pilot hole, be provided with the first spring in undergauge section, the first spring is positioned at the head of flechette-type spool Between bottom surface, portion and base upper surface.
Preferably in scheme, the head of flechette-type spool is positioned at the stream intracavity excessively that lower valve body is expanding, and base was fixedly mounted on Stream chamber bottom position, base be provided with annular cross runner, cross runner by least one side port with stream chamber connect.
Preferably in scheme, the top of base is additionally provided with at least one and crosses the base end face through hole of flow passage.
Preferably in scheme, described base end face through hole is arcuate socket.
Preferably in scheme, the undergauge section at flechette-type spool is provided with the through hole being perpendicular to axis, and through hole two ends are movably equipped with With the positioning head of bulb, between positioning head, it is provided with the second spring;
It is provided with the spherical draw-in groove corresponding with positioning head at pilot hole inwall.
Preferably in scheme, when positioning head snaps in spherical draw-in groove, and flechette-type spool and upper valve body are in released state.
A kind of arrow-shaped check valve that this utility model provides, by using the structure of spline surface, is not increasing stroke with outer On the premise of footpath, increase area of passage and exceed 1.5 ~ 2 times of original area of passage.The group that the taper surface used coordinates with spline surface Conjunction scheme, improves sealing effectiveness, in particular by the program, it is not necessary to arrange the close of extra sealing member, such as quality of rubber materials The structure such as seal, sealing drum, thus avoid the sealing member problem by high-pressure slurry Fast Wearing, improve arrow-shaped check valve Service life.The spherical positioning head arranged coordinates with spherical draw-in groove, it is possible to lock the position of flechette-type spool in normal work Put, thus avoid beating of flechette-type spool in the course of the work, reduce the springing of spring, extend arrow-shaped check valve further Service life.All the time will not seal runner during normal work, lower brill is smooth, it is simple to drilling fluid passes through.Meanwhile, when blowout and well kick Time, under the effect of blowout high pressure liquid, can prevent downhole fluid from flowing up with automatic-sealed again, beneficially well control operation.
Accompanying drawing explanation
The utility model is described in further detail with embodiment below in conjunction with the accompanying drawings:
Fig. 1 is that master of the present utility model regards overall structure cross-sectional schematic.
Fig. 2 is the close-up schematic view in Fig. 1 at B.
Fig. 3 is the structural representation of flechette-type spool in this utility model.
Fig. 4 is the schematic diagram in this utility model at arrow-shaped check valve minimum area of passage.
Fig. 5 is the structural representation of base in this utility model.
Fig. 6 is the plan structure schematic diagram of base in this utility model.
In figure: upper valve body 1, lower valve body 2, flechette-type spool 3, the first spring 4, base 5, positioning head 6, the second spring 7, guide Hole 8, the first spline surface 9, the second spline surface 10, through hole 11, spherical draw-in groove 12, base end face through hole 13, side port 14, taper surface 15, frustum 16, cross stream chamber 17.
Detailed description of the invention
In Fig. 1 ~ 6, a kind of arrow-shaped check valve, including the upper valve body 1 interconnected and lower valve body 2, it is provided with in upper valve body 1 Through hole, is sequentially provided with the taper surface 15 expanding relative to through hole and the first spline surface 10 in the bottom of through hole;
Being provided with valve body 2 flechette-type spool 3 in axial sliding under edge in lower valve body 2, flechette-type spool 3 top is correspondingly provided with and bores Shape face 15 seals the frustum 16 coordinated, and seals, with the first spline surface 10, the second spline surface 9 coordinated.
Preferably in scheme, the inwall of the described through hole that the first spline surface 10 be cylindricality be provided with multiple arc-shaped projection or Depression.The inwall using through hole in this example is provided with the structure of multiple arc-shaped depression.
Preferably in scheme, the described outer wall that the second spline surface 9 is cylindroid is provided with multiple arc-shaped depression or protruding. The outer wall using cylindroid in this example is provided with the structure that multiple arc-shaped is protruding.
By above-mentioned structure, when normally working, use the structure of spline surface, it is possible in the premise not changing other parameters Under, increase area of passage, see shown in Fig. 4, under the structure of the through-hole wall being especially arranged on upper valve body 1 at spline, Area of passage increase is bigger.When there is blowout and well kick, flechette-type spool 3 is formed with upper valve body 1 and seals, wherein frustum 16 and cone Shape face 15 forms the second level and seals, and the first spline surface 9 and the second spline surface 10 form the first order and seal, although the first order is sealed into Guarantee to slide smooth and easy and there is less gap, but seal through the first order and remain to reduce blowout and well kick to a great extent Time pressure, then seal through the second level of frustum 16 with taper surface 15, the closure to blowout and well kick can be realized completely, Without the extra sealing ring arranged.Extend service life, also reduce the difficulty of processing of part.
Preferably in scheme, it is provided with chamfering or rounding in the first spline surface 10 and the second spline surface 9 upper end.Thus structure, Utilize the principle of similar wedging, can also be carried further by chamfering or rounding between a spline surface 10 and the second spline surface 9 High sealing effect.
Preferably scheme such as Fig. 5, in 6, in lower valve body 2, be additionally provided with base 5, base 5 center is provided with pilot hole 8, flechette-type The bottom of spool 3 is provided with undergauge section, and undergauge section is slided in pilot hole 8, is provided with the first spring 4, the first spring 4 in undergauge section Between flechette-type spool 3 head bottom surface and base 5 upper surface.Thus structure, the first spring 4 tends to making flechette-type spool 3 by upper The through hole closure of valve body 1, not has high-pressure slurry to be depressed by flechette-type spool 3, opens runner, thus structure, it is possible in mud pressure During power deficiency, upper valve body 1 is sealed, it is to avoid the situation of blowout and well kick occurs.
Preferably in scheme such as Fig. 5, the head of flechette-type spool 3 is positioned at the stream chamber 17 excessively that lower valve body 2 is expanding, and base 5 is solid Dingan County was contained in the bottom position in stream chamber 17, and what base 5 was provided with annular crosses runner 18, crosses runner 18 by least one side port 14 connect with crossing stream chamber 17.Thus structure, it is simple to mud passes through.
Preferably scheme such as Fig. 6, in 3, the top of base 5 is additionally provided with the base end face that at least one and mistake runner 18 connect Through hole 13.Thus structure, when the situation of blowout and well kick occurs, liquid stream can be with bigger compression shock flechette-type spool 3 above The bottom surface of enlarged head, forms thrust upwards.Thus drive flechette-type spool 3 to block runner.
Preferably in scheme such as Fig. 6, described base end face through hole 13 is arcuate socket.Thus structure, increases blowout and well The liquid stream impact to flechette-type spool 3 under the situation gushed.
Preferably in scheme such as Fig. 1 ~ 3, the undergauge section at flechette-type spool 3 is provided with the through hole 11 being perpendicular to axis, through hole 11 Two ends are movably equipped with the positioning head 6 with bulb, are provided with the second spring 7 between positioning head 6;
It is provided with the spherical draw-in groove 12 corresponding with positioning head 6 at pilot hole 8 inwall.Thus structure, when operating, at mud Pressure under, flechette-type spool 3 is descending, when the positioning head 6 with round end arrives the position of spherical draw-in groove 12, at the second spring 7 Under effect, positioning head 6 snaps onto in spherical draw-in groove 12, thus is locked the position of flechette-type spool 3, even if mud pressure exists ripple Dynamic, flechette-type spool 3, under the locking action of positioning head 6, also will not be beated, thus extends the service life of the first spring 4.Work as well Under the situation of spray and well kick, under the impact of liquid stream, positioning head 6 disengages with spherical draw-in groove 12, thus flechette-type spool 3 is at the first bullet Runner is blocked under the effect of spring 4.
Preferably in scheme, when positioning head 6 snaps in spherical draw-in groove 12, and flechette-type spool 3 and upper valve body 1 are in released state. Thus structure, it is simple to mud passes through.
The above embodiments are only optimal technical scheme of the present utility model, and are not construed as limit of the present utility model System, the embodiment in the application and the feature in embodiment, can mutual combination in any in the case of not conflicting.This practicality is new The technical scheme that the protection domain of type should be recorded with claim, including technical characteristic in the technical scheme that claim is recorded Equivalents is protection domain.Equivalent the most in this range is improved, also protection domain of the present utility model it In.

Claims (10)

1. an arrow-shaped check valve, including the upper valve body (1) interconnected and lower valve body (2), is characterized in that: in upper valve body (1) It is provided with through hole, is sequentially provided with taper surface (15) and the first spline surface (10) in the bottom of through hole;
Being provided with along lower valve body (2) flechette-type spool (3) in axial sliding in lower valve body (2), flechette-type spool (3) top is correspondingly provided with Seal the frustum (16) coordinated with taper surface (15), and seal, with the first spline surface (10), the second spline surface (9) coordinated.
A kind of arrow-shaped check valve the most according to claim 1, is characterized in that: described the first spline surface (10) is in cylindricality The inwall of through hole to be provided with multiple arc-shaped raised or sunken.
A kind of arrow-shaped check valve the most according to claim 1, is characterized in that: described the second spline surface (9) is cylindroid Outer wall be provided with multiple arc-shaped depression or protruding.
A kind of arrow-shaped check valve the most according to claim 1, is characterized in that: in the first spline surface (10) and the second spline surface (9) upper end is provided with chamfering or rounding.
A kind of arrow-shaped check valve the most according to claim 1, is characterized in that: be additionally provided with base (5) in lower valve body (2), Base (5) center is provided with pilot hole (8), and the bottom of flechette-type spool (3) is provided with undergauge section, and undergauge section is slided in pilot hole (8), Being provided with the first spring (4) in undergauge section, the first spring (4) is positioned at head bottom surface and base (5) upper surface of flechette-type spool (3) Between.
A kind of arrow-shaped check valve the most according to claim 5, is characterized in that: the head of flechette-type spool (3) is positioned at lower valve body (2), in expanding stream chamber (17) excessively, base (5) was fixedly mounted on the bottom position of stream chamber (17), and base (5) is provided with annular Cross runner (18), cross runner (18) by least one side port (14) with mistake stream chamber (17) connect.
A kind of arrow-shaped check valve the most according to claim 6, is characterized in that: the top of base (5) is additionally provided with at least one With base end face through hole (13) that runner (18) connects excessively.
A kind of arrow-shaped check valve the most according to claim 7, is characterized in that: described base end face through hole (13) is arc Hole.
A kind of arrow-shaped check valve the most according to claim 5, is characterized in that: the undergauge section at flechette-type spool (3) is provided with vertical Straight in the through hole (11) of axis, through hole (11) two ends are movably equipped with the positioning head (6) with bulb, and positioning head is provided with between (6) Second spring (7);
It is provided with the spherical draw-in groove (12) corresponding with positioning head (6) at pilot hole (8) inwall.
A kind of arrow-shaped check valve the most according to claim 9, is characterized in that: when positioning head (6) snaps in spherical draw-in groove (12), flechette-type spool (3) and upper valve body (1) are in released state.
CN201620620301.9U 2016-06-22 2016-06-22 arrow-shaped check valve Expired - Fee Related CN205689172U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201620620301.9U CN205689172U (en) 2016-06-22 2016-06-22 arrow-shaped check valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201620620301.9U CN205689172U (en) 2016-06-22 2016-06-22 arrow-shaped check valve

Publications (1)

Publication Number Publication Date
CN205689172U true CN205689172U (en) 2016-11-16

Family

ID=57415291

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201620620301.9U Expired - Fee Related CN205689172U (en) 2016-06-22 2016-06-22 arrow-shaped check valve

Country Status (1)

Country Link
CN (1) CN205689172U (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105888610A (en) * 2016-06-22 2016-08-24 长江大学 Arrow-shaped check valve
CN108798591A (en) * 2018-06-12 2018-11-13 武汉理工大学 A kind of arrow-shaped check valve

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105888610A (en) * 2016-06-22 2016-08-24 长江大学 Arrow-shaped check valve
CN105888610B (en) * 2016-06-22 2019-04-19 长江大学 Arrow-shaped check valve
CN108798591A (en) * 2018-06-12 2018-11-13 武汉理工大学 A kind of arrow-shaped check valve

Similar Documents

Publication Publication Date Title
US4962819A (en) Mud saver valve with replaceable inner sleeve
CN204457524U (en) A kind of screw drilling tool by-pass valve with interior blowout prevention function
US3244459A (en) Pressure lubricated drill bit bearing
CN103821477B (en) Self-balancing storm valve
CN102654024B (en) Hydraulic chambering device for drilling
GB2227772A (en) Mud saver valve with increased flow check valve.
CN102758926A (en) Replaceable floating gate valve seat seal
CN103256007B (en) Underground dynamic pressurizing drilling rig
CN104806194B (en) Environment-friendly type washing well water injection packer with step-by-step deblocking
CN103161427B (en) Multifunctional continuous circulating safety valve
CA3009888C (en) Downhole valve apparatus
US20130199849A1 (en) Impulse-type underground supercharged jet drilling method and device
US10100826B2 (en) Pad plunger
CN104963652B (en) From sealed compression packer
CN103527076A (en) Top-driving-power faucet
RU2614342C1 (en) Return valve for drilling strings
CN201513157U (en) Inverse well-flushing double seal check valve
CN201568013U (en) Two-stage cementer free from drilling
CN104213868B (en) Desirable bore anchor packer
CN103291271B (en) A kind of can the fracturing sliding bush of multiple switching
CN104632145A (en) Plunger used for gas well water drainage
CN203067789U (en) Double-hard-sealing sleeve type regulating valve with flexible structure
CN105888638A (en) Timing sliding sleeve fracturing pipe column
CN104373075B (en) Fracturing packer
CN204344977U (en) Wear-resisting acidproof special fixing ball valve

Legal Events

Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20161116

Termination date: 20170622