CN216666589U

CN216666589U - Hydraulic control arrow-shaped check valve capable of being opened and closed in real time in circulating manner

Info

Publication number: CN216666589U
Application number: CN202123025150.2U
Authority: CN
Inventors: 张天桐; 王磊; 王彦超; 王庆森; 李想; 张立杰; 周恒仓
Original assignee: Mudanjiang Linhai Petroleum Fishing Tool Co ltd
Current assignee: Mudanjiang Linhai Petroleum Fishing Tool Co ltd
Priority date: 2021-12-07
Filing date: 2021-12-07
Publication date: 2022-06-03
Anticipated expiration: 2031-12-07

Abstract

The utility model provides a hydraulic control can be at arrow shape check valve of circulation switching immediately, including top connection, lower clutch, case, seal receptacle, track cover and thrust spring, seal receptacle and track cover fixed mounting are in the fluid flow passageway, track cover outside surface is provided with long recess, short recess and transition recess, install the track round pin axle on the case, thrust spring sets up in the case lower part, the utility model adopts the cooperation structure of track round pin axle and track cover, can make the track round pin axle spacing in turn in long recess and short recess through mud pump pressure control, the case is abundant lifting in long recess, the check valve keeps normal closed state, and the track round pin axle case can not abundant lifting in short recess, the check valve keeps normally open state, in being applied to drilling operation, can realize blocking the liquid flow in the pit in time when the kick, and switch on the liquid flow in the pit in time when need circulation mud well-washing, the opening and closing process can be switched by increasing the alternate multi-cycle operation of the mud pump pressure at the well head, the use function of products is improved, and the production efficiency of drilling is improved.

Description

Hydraulic control arrow-shaped check valve capable of being opened and closed in real time in circulating manner

Technical Field

The utility model relates to a hydraulic control arrow-shaped check valve, in particular to a hydraulic control arrow-shaped check valve capable of being opened and closed in an instant circulating manner.

Background

The check valve of drilling tool is a special well-drilling device for preventing high-pressure stratum fluid and drilling fluid from being sprayed out from drilling tool in petroleum and natural gas drilling production, mainly including arrow-shaped check valve, ball-shaped check valve, input check valve and drilling tool float valve, in which: the arrow-shaped check valve is attached to a valve seat and sealed or separated and opened by controlling the arrow-shaped valve core to move up and down in a drilling tool, so that a channel in a drilling string is closed to prevent bottom hole pressure from upwelling, or the channel in the drilling string is opened to establish slurry circulation. The utility model discloses a patent No. 2020208246528 'an independently control closed arrow shape check valve in usual open type' adopts stable design structure in usual open type, can keep sealed face open mode to send down, has solved the too big problem of drilling tool resistance down, simultaneously, can also be through improving pump well head pumping pressure increase mud flow when needing to block down the liquid stream from main control case structural conversion to the usual closed type, has richened the product function. However, this utility model discloses a technical scheme can only realize by open once only to the conversion of normal close formula to the check valve, and the drilling tool water hole can't be opened once more after the conversion is complete, therefore the well drilling in-process can only carry out well liquid circulation well-flushing, still has very big limitation in oil field well drilling production practical application, can not well satisfy the high-quality efficient production demand in oil field. Therefore, there is a need to further improve and perfect the design structure of the arrow-shaped check valve, improve the use function of the product and improve the production efficiency of the well drilling.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a hydraulic control arrow-shaped check valve capable of being opened and closed instantly, which can realize the alternate and repeated cyclic operation conversion of blocking and conducting down-hole liquid flow, improve the use function of products and improve the production efficiency of oil extraction.

A hydraulically controlled instantaneous opening and closing arrow check valve comprising: the device comprises an upper joint, a lower joint, a valve core, a sealing seat, a track sleeve and a thrust spring; the upper joint and the lower joint are connected up and down to form a check valve body, the check valve body is provided with a liquid flow channel with two through ends, the sealing seat is an annular sleeve body, the end head at the lower end of the sealing seat is provided with a concave conical sealing surface, and the limiting and fixing device is arranged at the upper part of the liquid flow channel; the track sleeve is a circular cylinder and is fixedly arranged at the lower part of the liquid flow channel, long grooves and short grooves which are arranged alternately are formed in the outer side surface along the axis direction, transition grooves which are communicated with the long grooves and the short grooves are further formed between every two adjacent long grooves and short grooves, the long grooves, the short grooves and the transition grooves have the same depth, lower guide surfaces are respectively arranged at the bottoms of the long grooves and the short grooves, upper guide surfaces are respectively arranged at the tops of the transition grooves, and the lower guide surfaces and the upper guide surfaces keep the same guide direction; the valve core is integrally arrow-shaped, an outer convex conical sealing surface is arranged at the front end of the valve core, the outer convex conical sealing surface is in sealing fit with an inner concave conical sealing surface on the sealing seat, the tail end of the valve core is a cylindrical rod body, a liquid flow hole communicated with an inner cavity of the cylinder is formed in the side wall of the upper part of the valve core, a track pin shaft is fixedly arranged on the inner side surface of the lower part of the valve core, the track pin shaft is correspondingly matched with the long groove, the short groove and the transition groove formed in the track sleeve respectively, the rod body is sleeved on the track sleeve in a matching mode, and the track pin shaft is embedded in the long groove, the short groove or the transition groove; the thrust spring is arranged at the lower part of the valve core and sleeved outside the track sleeve, the upper end of the thrust spring is supported at the lower end of the valve core, and the lower end of the thrust spring is supported on the check valve body to apply upward elastic thrust to the valve core.

Furthermore, in order to improve the stability and reliability of the valve core relative to the control motion of the track sleeve, 2-3 track pin shafts are preferably uniformly distributed on the valve core along the circumference, and the number and the positions of the long grooves and the short grooves on the track sleeve are respectively adapted to the number of the track pin shafts.

Further, it is right that preferred adoption supports the integrated configuration of cover, interior spring card and concatenation ring the seal receptacle carries out spacing fixed, the seal receptacle by interior protruding circular bead on the top connection supports the cooperation and inlays to be in among the flow channel, the concatenation ring is the annular sleeve body that comprises a plurality of block combinations of cutting apart, supports the top of seal receptacle and inlays to be in the annular groove of seting up on the top connection, support the cover cooperation and inlay to be in the annular hole of concatenation ring right the concatenation ring carries out radial spacing, interior spring card sets up support the upper end of cover and inlay the card in the annular groove of seting up on the interior anchor ring is right it carries out axial spacing to support the cover, makes support the cover interior spring card with the concatenation ring combination forms the fixed connection assembly, will the seal receptacle is fixed on the top connection.

Still further, in order to improve the sealing performance of the arrow-shaped check valve that opens and closes instantly under hydraulic control, preferably the seal receptacle with be in the face is connected in the cooperation of top connection and be provided with the sealing washer on the sealed face of indent circular cone shape respectively.

The utility model has the advantages that the utility model provides the hydraulic control arrow-shaped check valve, which adopts the matching structure of the track pin shaft and the track sleeve, can lead the track pin shaft to be alternately limited in the long groove and the short groove which are arranged on the track sleeve through the control of the slurry pump pressure and the interaction with the elastic force of the thrust spring, because the track pin shaft which is limited in the long groove is not axially restricted, the valve core is fully lifted to form sealing matching with the sealing seat, the check valve keeps the normal close state, the track pin shaft which is limited in the short groove is limited by the height of the groove, the valve core can not be fully lifted to form the matching height with the sealing seat, the check valve keeps the normal open state, and the hydraulic control arrow-shaped check valve is applied to the drilling operation process of the oil field, can realize the instant blocking of the liquid flow under the well when the well kick needs to be controlled, and can also instantly conduct the liquid flow under the well when the mud well needs to be washed by circulating mud, and the opening and closing process can be alternately and repeatedly operated and switched by increasing the slurry pump pressure of the wellhead, the service function of the product is improved, and the oil extraction production efficiency is improved.

Drawings

FIG. 1 is a diagram showing an opened state of an arrow check valve which is opened and closed instantly by hydraulic control in the embodiment.

Fig. 2 is a sectional view taken along line a-a of fig. 1.

Fig. 3 is a structural diagram of a closed state of an arrow-shaped check valve for instantly opening and closing by hydraulic control in an embodiment.

Fig. 4 is a sectional view taken along line B-B of fig. 3.

Fig. 5 is a diagram of a track cover configuration.

Detailed Description

The technical solution claimed by the present invention is further described below with reference to the specific embodiments and the accompanying drawings.

An arrow-shaped check valve which is hydraulically controlled to be opened and closed instantly is composed of an upper connector 1, a lower connector 2, a valve core 3, a sealing seat 4, a track sleeve 5, a thrust spring 6, a supporting sleeve 8, an inner spring clamp 9 and a splicing ring 10 as shown in figures 1 and 3.

The two ends of the upper joint 1 are respectively provided with internal threads, the two ends of the lower joint 2 are respectively provided with external threads, the upper end of the lower joint is also simultaneously provided with internal threads, the lower end of the upper joint 1 is in threaded connection with the upper end of the lower joint 2 to form a check valve body, the check valve body is provided with a liquid flow channel with two through ends, the sealing seat 4 is an annular sleeve body, the end head of the lower end of the sealing seat is provided with a concave conical sealing surface, an inner convex shoulder on the upper joint 1 supports and is embedded at the upper part of the liquid flow channel, the splicing ring 10 is composed of split block bodies and abuts against the upper end of the sealing seat 4 and is embedded in an annular groove formed in the upper joint 1, the support sleeve 8 is embedded in an annular hole of the splicing ring 10 in a matched manner, the inner spring clamp 9 is arranged at the upper end of the support sleeve 8 and is embedded and clamped in an annular groove formed in the inner annular surface of the splicing ring 10, the sealing seat 4 is limited and fixed on the upper joint 1, sealing rings are respectively arranged on the matching connection surface of the sealing seat 4 and the upper joint 1 and on the concave conical sealing surface, the track sleeve 5 is a circular cylinder, the lower end of the track sleeve is provided with an external thread and is arranged in the liquid flow channel, is matched and fixedly connected with the internal thread at the upper end of the lower joint 2, as shown in figure 5, 4 long grooves 11 and short grooves 12 which are arranged alternately are respectively arranged on the outer side surface along the axial direction, a transition groove 13 which is communicated with the long grooves 11 and the short grooves 12 is also arranged between each adjacent long grooves 11 and short grooves 12, the bottoms of the long groove 11 and the short groove 12 are respectively provided with a lower guide surface 14, the top of the transition groove 13 is respectively provided with an upper guide surface 15, and the lower guide surface 14 and the upper guide surface 15 keep the same guide direction; the whole valve core 3 is arrow-shaped, the front end is provided with and the sealed face of indent circular cone forms the outer convex circular cone sealing face of corresponding complex, and the tail end is the body of rod that is the cylinder, and the circumference evenly distributed is seted up 4 liquid flow holes that switch on with the drum inner chamber on the lateral wall of upper portion, and radial symmetric position fixed mounting has 2 track round pin axles 7 on the medial surface of lower part, as shown in fig. 2 and fig. 4, body of rod cooperation cover is put on the

track cover

5, 2 track round pin axle 7 is inlayed respectively and is put corresponding position long recess 11 short recess 12 perhaps among the transition recess 13, thrust spring 6 upper end supports the lower extreme of valve core 3, and the lower extreme supports on the interior protruding circular bead of top connection 1.

The hydraulic control instant-open and instant-close arrow-shaped check valve is applied to drilling production operation, the upper end of an upper joint 1 and the lower end of a lower joint 2 are respectively connected with a drill rod of a drilling tool in a threaded manner and delivered to a well, as shown in figures 1 and 2, 2 track pin shafts 7 are preset in a short groove 12 formed in a track sleeve 5, so that a convex conical sealing surface on a valve core 3 is separated from a concave conical sealing surface on a sealing seat 4, the hydraulic control instant-open and instant-close arrow-shaped check valve keeps a structural normally-open state, the resistance of the well descending while drilling is reduced, and the delivery efficiency of the drilling tool can be improved; when the liquid flow channel of the drill rod of the drilling tool needs to be closed under the condition of underground, the pressure of a wellhead pump is increased to increase the mud flow, the pressure of well liquid overcomes the elastic force of a thrust spring 6 to push the valve core 3 to move downwards relative to the track sleeve 5, at the moment, 2 track pin shafts 7 move downwards along the short groove 12, when the track pin shafts move to the bottom of the short groove 12, under the action of a lower guide surface 14, the track pin shafts 7 are guided into a transition groove 13 to the bottom of the transition groove 13, then, the pressure of the wellhead pump is reduced or removed, the thrust spring 6 pushes the valve core 3 to move upwards, at the moment, 2 track pin shafts 7 move upwards along the transition groove 13, when the track pin shafts move to the top of the transition groove 13, under the action of an upper guide surface 15, the track pin shafts 7 are guided into the long groove 11 and continue to move upwards along the long groove 11, until the male conical sealing surface and the female conical sealing surface are mutually closed, as shown in fig. 3 and 4, the arrow-shaped check valve which is hydraulically controlled to be opened and closed instantly is switched to be in a normally closed state; when the drilling process requires to reopen the drill pipe fluid channel, the wellhead pump pressure is increased again to increase the mud flow rate, the valve core 3 is pushed to move downwards relative to the track sleeve 5, at this time, 2 track pins 7 move downwards along the long groove 11, when the track pins move to the bottom of the long groove 11, the guide surfaces 14 guide the track pins 7 to enter the transition groove 13 to the bottom of the transition groove 13, then, the wellhead pump pressure is reduced or removed, the thrust spring 6 pushes the valve core 3 to move upwards, at this time, 2 track pins 7 move upwards along the transition groove 13, when the track pins move to the top of the transition groove 13, the upper guide surfaces 15 guide the track pins 7 to enter the short groove 12 and move upwards to the top of the short groove 12, and the upward stroke of the valve core 3 is limited, the male conical sealing surface and the female conical sealing surface are separated from each other, as shown in fig. 1 and 2, the arrow-shaped check valve which is hydraulically controlled to be opened and closed instantly is switched to be in a normally open state again.

The switching operation between the aforesaid normally open state of the arrow check valve of the instant switching of a kind of hydraulic control and the normally closed state can be carried out in a circulating reciprocating way, can enough guarantee to close the drilling tool water hole in time when the kick takes place, guarantee the well drilling production, avoid the production accident, simultaneously can also be when needing circulating mud to wash the well, open the drilling tool water hole immediately, guarantee the circulation of mud liquid stream, and this kind of circulation mud well washing operation can be controlled and implemented many times according to the well drilling technological requirement, have abundant flexibility and good manufacturability, can satisfy the high-quality efficient production demand of oil field well.

Claims

1. An arrow-shaped check valve which is hydraulically controlled and can be opened and closed in an instant circulating manner, comprising: the valve comprises an upper joint (1), a lower joint (2), a valve core (3), a sealing seat (4), a track sleeve (5) and a thrust spring (6);

the upper joint (1) and the lower joint (2) are connected with each other up and down to form a check valve body, the check valve body is provided with a liquid flow channel with two through ends, the sealing seat (4) is an annular sleeve body, the end head at the lower end of the sealing seat is provided with a concave conical sealing surface, and the sealing seat is fixedly arranged at the upper part of the liquid flow channel in a limiting way; the track sleeve (5) is a circular cylinder and is fixedly installed at the lower part of the liquid flow channel, long grooves (11) and short grooves (12) which are arranged at intervals are formed in the outer side surface of the track sleeve along the axis direction, transition grooves (13) which are communicated with the long grooves (11) and the short grooves (12) are further formed between the adjacent long grooves (11) and the adjacent short grooves (12), the long grooves (11), the short grooves (12) and the transition grooves (13) have the same depth, lower guide surfaces (14) are respectively arranged at the bottoms of the long grooves (11) and the short grooves (12), upper guide surfaces (15) are respectively arranged at the tops of the transition grooves (13), and the lower guide surfaces (14) and the upper guide surfaces (15) keep the same guide direction; the valve core (3) is integrally arrow-shaped, an outer convex conical sealing surface is arranged at the front end of the valve core, the outer convex conical sealing surface is in sealing fit with an inner concave conical sealing surface on the sealing seat (4), the tail end of the valve core is a cylindrical rod body, a liquid flow hole communicated with an inner cavity of the cylinder is formed in the side wall of the upper part of the valve core, a track pin shaft (7) is fixedly arranged on the inner side surface of the lower part of the valve core, the track pin shaft (7) is respectively in corresponding fit with the long groove (11), the short groove (12) and the transition groove (13) formed in the track sleeve (5), the rod body is sleeved on the track sleeve (5) in a matching manner, and the track pin shaft (7) is embedded in the long groove (11), the short groove (12) or the transition groove (13); the thrust spring (6) is arranged at the lower part of the valve core (3) and sleeved outside the track sleeve (5), the upper end of the thrust spring is supported at the lower end of the valve core (3), the lower end of the thrust spring is supported above the check valve body, and upward elastic thrust is applied to the valve core (3).

2. A hydraulically controlled instantly cyclically openable and closable arrow-shaped check valve as claimed in claim 1, wherein: the number and the positions of the long grooves (11) and the short grooves (12) on the track sleeve (5) are respectively adapted to the number of the track pin shafts (7).

3. A hydraulically controlled instantly cyclically openable and closable arrow-shaped check valve as claimed in claim 1, wherein: adopt the integrated configuration of supporting sleeve (8), interior spring card (9) and concatenation ring (10) to right sealed seat (4) carries out spacing fixed, sealed seat (4) by interior protruding circular bead on top connection (1) supports the cooperation and inlays to be put in the flow channel, concatenation ring (10) are for the ring type body that constitutes by cutting apart the block combination, support the top of sealed seat (4) and inlay in the annular groove of seting up on top connection (1), support the cooperation of cover (8) inlay in the annular hole of concatenation ring (10) right it is radial spacing to carry out the concatenation ring, interior spring card (9) set up support the upper end of cover (8) and block in carry out axial spacing in the annular groove of seting up on concatenation ring (10) the internal ring face support the cover (8), make support cover (8), interior spring card (9) and concatenation ring (10) combination form the fixed connection assembly, and the sealing seat (4) is limited and fixed on the upper joint (1).

4. A hydraulically controlled instantly circulating open and close arrow-shaped check valve according to any one of claims 1 to 3, characterized in that: and sealing rings are respectively arranged on the matching connection surface of the sealing seat (4) and the upper joint (1) and on the concave conical sealing surface.