CN114278231B - Drilling tool float valve capable of controlling circulation switch by well pressure - Google Patents
Drilling tool float valve capable of controlling circulation switch by well pressure Download PDFInfo
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- CN114278231B CN114278231B CN202111458542.XA CN202111458542A CN114278231B CN 114278231 B CN114278231 B CN 114278231B CN 202111458542 A CN202111458542 A CN 202111458542A CN 114278231 B CN114278231 B CN 114278231B
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Abstract
The utility model provides a but drilling tool floating valve of well pressure control circulation switch, including the valve body, the valve pocket, the guide pin bushing, valve rod and spring, the valve pocket is inlayed in the valve body, the lateral surface is sealed with the valve body cooperation, the middle part is provided with the valve rod support frame, keep the flow channel in the inner chamber, dispose the elasticity spacer pin on the guide pin bushing, fixed mounting is on the valve rod support frame, the valve rod cartridge is on the guide pin, upper portion and valve pocket cooperation constitution sealing connection, set up the track groove that has high-order spacing point H and low-order spacing point L respectively on the valve rod, be provided with 4 route control points in the track groove, the perpendicular step that falls that has orientation same clockwise respectively, have restriction elasticity spacer pin specific direction of motion and to the effect of setting for the direction of motion guide, through track groove and elasticity spacer pin cooperation, utilize well head pressure control valve rod and valve pocket sealing and opening, realize drilling tool floating valve instant control switch, have good operability, can improve production efficiency, low production cost, improve well drilling production technology.
Description
Technical Field
The invention relates to a drilling tool float valve, in particular to a drilling tool float valve with a circulated switch controlled by well pressure.
Background
The check valve of drilling tool is a special device under drilling while drilling for preventing high-pressure fluid in the ground and drilling fluid from being sprayed out from drilling tool in petroleum and natural gas drilling production, mainly comprising arrow-shaped check valve, ball-shaped check valve, input check valve, drilling tool floating valve and other types, wherein: the drilling tool floating valve is a check valve which is connected with a drill bit to run in a well, is usually a one-way valve, can control slurry to flow reversely from top to bottom, can automatically close to prevent slurry from being gushed from a drill rod water hole to a wellhead to form blowout, mainly has two structural forms of normally open type and normally closed type, but is under the action of well fluid resistance, and is in a normally closed state in the drilling process no matter whether the normally open type or the normally closed type, so that drilling tool floating valve can only stop drilling operation when slurry is required to be injected to balance well pressure to prevent blowout after the drilling tool is lowered for hundreds of meters. The self-priming drilling tool floating valve which always maintains a normally open structure in the well descending process is applied to a certain extent, but the drilling tool floating valve has a once control closing function, is actually converted into a normally closed drilling tool floating valve structure after being closed, and is returned to the traditional drilling stopping and grouting slurry operation process, so that the prior art problem cannot be fundamentally solved, and therefore, the drilling tool floating valve which can circulate the underground slurry at any time according to the production requirement by means of a wellhead operation independent circulation control switch is developed, and the self-priming drilling tool floating valve has become an actual problem to be researched and solved in the current oilfield production.
Disclosure of Invention
The invention aims to provide a drilling tool floating valve capable of being circularly opened and closed under well pressure control, improve a drilling production process and meet the production requirements of oil fields.
A drilling tool float valve for a well pressure controlled, recyclable switch, comprising: the valve body is a cylindrical barrel, connecting structures for connecting drilling tools and drilling tools are respectively arranged at the upper end and the lower end of the valve body, the valve sleeve is inlaid in the inner cavity of the valve body, the upper part is of a sleeve type sealing structure, a conical shoulder sealing surface is arranged on the inner side surface of the valve sleeve, the outer side surface of the valve sleeve is in sealing fit with the inner side surface of the valve body, a valve rod supporting frame is arranged in the middle of the valve sleeve, a liquid flow channel penetrating up and down is kept in the inner cavity of the valve sleeve, an upper through center shaft hole and a lower through center shaft hole are formed in the guide sleeve, an elastic limiting pin is arranged on the side wall of the valve sleeve, the valve rod supporting frame is fixedly arranged on the valve rod, a rod body of the valve rod is in structural fit with the center shaft hole of the guide sleeve, the valve rod is inserted on the guide sleeve, an umbrella type bonnet is arranged on the upper part of the valve sleeve, the front end face of the umbrella type bonnet is of a conical sealing surface, the conical sealing surface is in structural correspondence with the sealing surface on the valve sleeve, a track groove with a guide control structure is further formed in sealing fit with the inner side of the inner side surface of the valve body, a high-position limiting point H and a low-position limiting point L is arranged on the rod body of the valve rod, an elastic limiting pin is arranged on the guide groove, the track groove is alternately matched with the guide groove, the guide groove is arranged between the upper end and the guide groove alternately, the guide groove is matched with the guide groove, the guide groove is in the guide groove and the guide groove is in the sealing groove.
The track groove is integrally in a tadpole shape, the front end of the track groove is a closed-loop path control area, the tail end of the track groove is an axial travel adjustment area, the path control area is a unidirectional circulation guide groove, one side of the high-position limiting point H is a rising path of the elastic limiting pin, the other side of the high-position limiting point H is a falling path, 4 path control points which are respectively a control point A, a control point B, a control point C and a control point D are arranged in the closed-loop path, each path control point is respectively provided with a vertical descending step facing the same clockwise direction, vertical step faces perpendicular to the bottom surface of the track groove are respectively formed, and the vertical step faces have the function of limiting the specific movement direction of the elastic limiting pin and simultaneously are matched with the side wall of the track groove to guide the elastic limiting pin to move towards the set direction; wherein: the vertical step surface of the control point A is a high-level guide-in surface, is arranged on one side of the ascending path, is upward in cross section, is inclined towards the high-level limit point H, forms a smooth integral surface with the side wall of the track groove, and can guide the elastic limit pin into the high-level limit point H; the vertical step surface of the control point B is a high-position upper guide surface and is arranged at the upper part of the high-position limiting point H at one side of the ascending path, the section faces downwards and is upward toward one side of the descending path, and the vertical step surface and the side wall of the track groove form a smooth connected integral surface, so that the elastic limiting pin can be guided out of the high-position limiting point H; the vertical step surface of the control point C is a high-position lower guide surface and is arranged at the upper part of the other side of the high-position limiting point H, the section is upward, and the vertical step surface inclines towards one side of the descending path so as to guide the elastic limiting pin into the descending path; the vertical step surface of the control point D is a path guide surface, is arranged at a connection interface with the stroke adjustment area, is upward in cross section, is upward toward one side of the ascending path, forms a smooth and connected integral surface with the side wall of the track groove, and can guide the elastic limiting pin lifted from the stroke adjustment area into the ascending path.
Further, in order to improve the stability of the cooperation of the rail groove and the elastic stopper pin and reduce the frictional resistance of the relative movement, it is preferable that the vertical lowering steps of the control point a, the control point B, the control point C and the control point D have the same height lowering amount.
Further, in order to improve balance of the track groove and the elastic limiting pin on the valve rod in cooperation control and improve cooperation sealing effect between the valve rod and the valve sleeve, preferably, 2 track grooves are symmetrically formed on a rod body of the valve rod in a radial direction, and 2 elastic limiting pins are correspondingly arranged on the guide sleeve and correspond to the track grooves, and respectively form corresponding cooperation with the track grooves.
The drilling tool float valve with the well pressure controlled and circulated switch further comprises: the valve core sealing ring is fixedly arranged on the lower end face of the umbrella-shaped valve bonnet and extends out of the circular edge of the umbrella-shaped valve bonnet, and the valve rod and the valve sleeve are sealed in a matched mode to implement secondary sealing on a contact gap between the valve rod and the valve sleeve.
The beneficial effects of the invention are as follows: the utility model provides a but drilling tool floating valve of well pressure control circulation switch adopts the track groove that has the direction control structure to cooperate with the elasticity spacer pin, through well head pressure control valve rod and valve pocket alternate conversion between cooperation sealed and separation open state, realize the instant control switch of drilling tool floating valve, wherein, the track groove is the local tadpole shape that the width is less for only need relative rotation very little angle between valve rod and the valve pocket under the operating condition, can effectively reduce the operating resistance between the two, reduce the magnitude requirement of well head control pressure, have good operability, be applied to in actual production, can improve production efficiency, reduce manufacturing cost, improve drilling production technology, satisfy the oil field production demand.
Drawings
FIG. 1 is a schematic diagram of a floating valve of a drilling tool with a pressure-controlled, recyclable switch.
Fig. 2 is a cross-sectional view taken along line A-A in fig. 1.
FIG. 3 is an enlarged view of the portion I in FIG. 1.
Fig. 4 is a schematic diagram of the shape and structure of a rail groove formed on a valve rod.
Fig. 5 shows the depth variation of the track groove in fig. 4.
Detailed Description
The technical scheme of the invention claimed in the specification is further described below with reference to specific embodiments and attached drawings.
The drilling tool floating valve capable of being circularly switched under well pressure control is composed of a valve body 1, a valve sleeve 2, a guide sleeve 3, a valve rod 4, a spring 5 and a valve core sealing ring 7 as shown in figures 1,2 and 3.
The valve body 1 is a cylindrical barrel, connecting internal threads and connecting external threads are respectively arranged at the upper end and the lower end, the valve sleeve 2 is inlaid in the inner cavity of the valve body 1, the upper part is of a sleeve type sealing structure, a conical shoulder sealing surface is arranged on the inner side surface, a valve sleeve sealing ring 8 is arranged on the outer side surface and is in sealing fit with the valve body 1, a valve rod supporting frame is arranged in the middle of the valve sleeve, 2 elastic limit pins 9 are radially and symmetrically arranged on the side wall of the guide sleeve 3, the fixed mounting is carried out on the valve rod supporting frame, the rod body of the valve rod 4 is matched and inserted on the guide sleeve 3, an umbrella type sealing surface which corresponds to the shoulder sealing surface structure on the valve sleeve 2 is arranged at the upper part, the valve sleeve sealing ring 7 is fixedly arranged on the lower end surface of the umbrella type valve cap and extends out of the circular edge of the umbrella type valve cap, two-stage sealing can be carried out on a contact gap between the valve rod 4 and the valve sleeve 2, 2 track grooves 10 with the same structure are radially and symmetrically arranged on the rod body of the valve rod 4, the upper end and the lower end of the track groove 10 are respectively provided with high-position limit points H and low-position limit points L2 and corresponding to the elastic limit pins 9 are respectively embedded in the guide sleeve 4, and the guide sleeve 4 is correspondingly matched with the track grooves 4.
The track groove 10 is in a tadpole shape as a whole, as shown in fig. 4 and 5, the front end is a path control area with a closed loop, the tail end is a path adjustment area along the axial direction, the path control area is a unidirectional circulation guide groove, one side of the high-position limiting point H is a lifting path of the elastic limiting pin 9, the other side of the high-position limiting point H is a descending path, 4 path control points, namely a control point A, a control point B, a control point C and a control point D, are arranged in the closed loop path, are respectively provided with a vertical descending step facing the same clockwise direction, and respectively form a vertical step surface vertical to the bottom surface of the track groove 10; wherein: the vertical step surface of the control point A is a high-level guide-in surface, is arranged on one side of the ascending path, has an upward cross section, and is inclined at an angle of 30 degrees towards the high-level limit point H, the vertical step surface of the control point B is a high-level upper guide-out surface, is arranged on one side of the ascending path, is arranged on the upper part of the high-level limit point H, has a downward cross section, is inclined at an angle of 60 degrees towards one side of the descending path, the vertical step surface of the control point C is a high-level lower guide-out surface, is arranged on the other side of the high-level limit point H, has an upward cross section, is inclined at an angle of 30 degrees towards one side of the descending path, and is a path guide surface, is arranged at a connecting interface with the stroke adjustment area, and has an upward cross section, and is inclined at an angle of 60 degrees towards one side of the ascending path; in the track groove 10, as shown in fig. 5, the vertical lowering steps of the control point a, the control point B, the control point C, and the control point D are all one fourth of the maximum depth D of the track groove, wherein: the path section from the point L to the point F on the bottom surface of the track groove 10 is a plane with depth D/2, the path section from the point F to the point A is an inclined plane with depth reduced from D/2 to D/4, the path section from the point A to the point B is a plane with depth D/2, the path section from the point B to the point C is a plane with depth 3D/4, the path section from the point C to the point E is a plane with depth D, and the path section from the point E to the point D is an inclined plane with depth reduced from D to D/4.
The drilling tool floating valve with the well pressure control circulating switch is applied in production, an elastic limiting pin 9 is limited and preset at a high-position limiting point H of a track groove 10, a valve rod and a valve sleeve are separated, opened and kept in a normally open state, when a drill rod water hole needs to be closed under special well conditions, well hydraulic pressure is applied by a well mouth, after rated pressure is achieved, the well hydraulic pressure overcomes the elastic force and the well hydraulic reaction force of a spring 5 to push a valve rod 4 to move downwards, the elastic limiting pin 9 embedded in the track groove 10 is lifted from the high-position limiting point H until being in contact with a vertical stepped surface of a control point B, the vertical stepped surface of the control point B blocks the elastic limiting pin 9 from entering an ascending path of the track groove 10, and simultaneously guides the elastic limiting pin 9 to move out from one side of a descending path of the track groove 10 until exceeding a control point C, then, the well hydraulic pressure is removed, the valve rod 4 is rotated to move upwards under the action of the elastic force of the spring 5, the elastic limiting pin 9 is vertically lifted from the high-position limiting point H until being in contact with the control point C, and the vertical stepped surface of the control point B is fully matched with the track groove 10, and the vertical stepped surface of the control point C is in contact with the track groove 10 until reaching the vertical limiting point C, and the vertical path is fully contacted with the control point C, and the vertical path is completely contacted with the control point C, and the vertical path is moved down to the guide groove 10; conversely, when the drilling rod water hole circulation mud needs to be opened, well hydraulic pressure is applied by the well mouth again, the push valve rod 4 descends, the elastic limiting pin 9 embedded in the track groove 10 ascends from the low-position limiting point L, after entering the path control area of the track groove 10, the control point D vertically steps to block the elastic limiting pin 9 from entering the descending path, the elastic limiting pin 9 is guided into the ascending path and ascends along the ascending path until the control point A is exceeded, then the well hydraulic pressure is removed, the valve rod 4 rotates upwards again under the action of the elastic force of the spring 5, the elastic limiting pin 9 vertically falls back in the track groove 10 until contacting with the vertical step surface of the control point A, the vertical step surface of the control point A blocks the elastic limiting pin 9 to return to the ascending path, the elastic limiting pin 9 is guided to fall into the high-position limiting point H and is limited in the ascending path, and the valve sleeve 4 is limited in the ascending path, and the valve sleeve 2 is separated from the valve rod 2 at this moment.
Claims (4)
1. A drilling tool float valve for a well pressure controlled, recyclable switch, comprising: the valve comprises a valve body (1), a valve sleeve (2), a guide sleeve (3), a valve rod (4) and a spring (5);
The valve body (1) is a cylindrical barrel, the upper end and the lower end of the valve body (1) are respectively provided with a connecting structure for connecting drilling tools, the valve sleeve (2) is embedded in the inner cavity of the valve body (1), the upper part is of a sleeve type sealing structure, the inner side surface is provided with a conical shoulder sealing surface, the outer side surface is in sealing fit with the inner side surface of the valve body (1), the middle part is provided with a valve rod supporting frame, a liquid flow channel which penetrates up and down is kept in the inner cavity of the valve sleeve (2), the guide sleeve (3) is provided with an upper through center shaft hole and a lower through center shaft hole, the side wall is provided with an elastic limiting pin (9), the rod body of the valve rod (4) is fixedly arranged on a valve rod supporting frame arranged on the valve sleeve (2), the rod body of the valve rod (4) is matched with the center shaft hole of the guide sleeve (3) in a structure, the upper part is provided with an umbrella type valve cap, the front end surface is of the umbrella type sealing surface is of a cone, the cone sealing surface is mutually corresponding to the sealing surface structure of the valve rod sealing surface on the valve sleeve (2), the rod body of the valve rod (2) is provided with a guide groove (10) which is provided with a guide groove (10) and a limit groove (10) which is embedded in the upper end of the guide groove (4), the guide groove (4) is embedded in the guide groove (4) is provided with the limit groove (10), the valve rod (4) is supported between the umbrella-shaped valve cap and the guide sleeve (3), and upward elastic force is applied to the valve rod (4) relative to the guide sleeve (3);
the track groove (10) is in a tadpole shape as a whole, the front end is a path control area with a closed loop, the tail end is a path adjustment area along the axial direction, the path control area is a unidirectional circulation guide groove, one side of the high-position limiting point H is a rising path of the elastic limiting pin, the other side of the high-position limiting point H is a falling path, 4 path control points which are respectively a control point A, a control point B, a control point C and a control point D are arranged in the closed loop path, and each path control point is respectively provided with a vertical descending step facing the same clockwise direction and respectively forms a vertical step surface vertical to the bottom surface of the track groove (10);
Wherein: the vertical step surface of the control point A is a high-level guide-in surface, is arranged on one side of the ascending path, is upward in cross section, is inclined towards the high-level limit point H, and forms a smooth integral surface with the side wall of the track groove (10); the vertical step surface of the control point B is a high-position upper guide surface and is arranged at the upper part of the high-position limiting point H at one side of the ascending path, the section faces downwards, and the section faces upwards towards one side of the descending path and forms a smooth connecting integral surface with the side wall of the track groove (10); the vertical step surface of the control point C is a high-position lower guide surface and is arranged at the upper part of the other side of the high-position limiting point H, the section is upward, and the section is inclined towards one side of the descending path; the vertical step surface of the control point D is a path guide surface, is arranged at a connecting interface with the stroke adjusting area, has an upward cross section, is upward faced towards one side of the ascending path, and forms an integral surface in smooth connection with the side wall of the track groove (10).
2. The drilling tool float valve of claim 1, wherein the drilling tool float valve is a well pressure control recyclable switch, wherein: the vertical lowering steps of the control point A, the control point B, the control point C and the control point D have the same height lowering amount.
3. A drilling tool float valve of a well pressure controlled recyclable switch as defined in claim 2, wherein: 2 track grooves (10) are symmetrically formed in the rod body of the valve rod (4) in the radial direction, 2 elastic limiting pins (9) are correspondingly arranged on the guide sleeve (3) and correspond to the track grooves (10), and the elastic limiting pins and the track grooves (10) are correspondingly matched.
4. A drilling tool float valve of a well pressure controlled recyclable switch as claimed in any one of claims 1 to 3, wherein: further comprises: the valve core sealing ring (7) is fixedly arranged on the lower end face of the umbrella-shaped valve bonnet and extends out of the circular edge of the umbrella-shaped valve bonnet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111458542.XA CN114278231B (en) | 2021-12-03 | 2021-12-03 | Drilling tool float valve capable of controlling circulation switch by well pressure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111458542.XA CN114278231B (en) | 2021-12-03 | 2021-12-03 | Drilling tool float valve capable of controlling circulation switch by well pressure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114278231A CN114278231A (en) | 2022-04-05 |
| CN114278231B true CN114278231B (en) | 2024-06-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111458542.XA Active CN114278231B (en) | 2021-12-03 | 2021-12-03 | Drilling tool float valve capable of controlling circulation switch by well pressure |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117189030B (en) * | 2023-09-21 | 2026-04-10 | 青岛宏新天机械有限公司 | Automatic filling float valve |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN216342043U (en) * | 2021-12-03 | 2022-04-19 | 牡丹江市林海石油打捞工具有限公司 | Drilling tool float valve capable of being opened and closed circularly through well pressure control |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2214540A (en) * | 1988-01-18 | 1989-09-06 | Earl Engineering Limited | Downhole valve mechanism |
| US5609178A (en) * | 1995-09-28 | 1997-03-11 | Baker Hughes Incorporated | Pressure-actuated valve and method |
| EP1689968A1 (en) * | 2003-11-17 | 2006-08-16 | Churchill Drilling Tools Limited | Downhole tool |
| CN201057021Y (en) * | 2007-06-20 | 2008-05-07 | 大港油田集团有限责任公司 | Pressure balanced downhole switch |
| CN101982642B (en) * | 2010-10-12 | 2013-02-06 | 东营市创元石油机械制造有限公司 | Remote control type drilling bypass circulation valve |
| CN203961910U (en) * | 2014-07-11 | 2014-11-26 | 中国石油天然气股份有限公司 | A downhole hydraulically controlled double-channel single-flow valve |
| CN105781485B (en) * | 2016-04-07 | 2018-07-13 | 通化市前进石油机械有限公司 | A kind of circulation type is from grouting floating hoop |
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2021
- 2021-12-03 CN CN202111458542.XA patent/CN114278231B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN216342043U (en) * | 2021-12-03 | 2022-04-19 | 牡丹江市林海石油打捞工具有限公司 | Drilling tool float valve capable of being opened and closed circularly through well pressure control |
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