CN112554843A

CN112554843A - Multiple-switch circulating valve

Info

Publication number: CN112554843A
Application number: CN201910919891.3A
Authority: CN
Inventors: 薛占峰; 马兰荣; 杨德锴; 朱和明; 侯乃贺
Original assignee: China Petroleum and Chemical Corp; Sinopec Research Institute of Petroleum Engineering
Current assignee: China Petroleum and Chemical Corp; Sinopec Research Institute of Petroleum Engineering
Priority date: 2019-09-26
Filing date: 2019-09-26
Publication date: 2021-03-26
Anticipated expiration: 2039-09-26
Also published as: CN112554843B

Abstract

The invention provides a circulating valve capable of being switched on and off repeatedly, which comprises an upper joint, an upper body, a lower joint, an upper inner sleeve and a lower inner sleeve, wherein the upper joint, the upper body, the lower body and the lower joint are sequentially connected; the upper joint is provided with two groups of circulating through holes, the upper inner sleeve is arranged in the upper joint, and the circulating holes are arranged on the upper inner sleeve; wherein: the elastic piece is clamped between the second shoulder surface of the lower inner sleeve and the shoulder surface of the lower body; the lower end of the lower inner sleeve is provided with travel tracks at intervals along the axial direction, and the lower body is provided with a guide screw group matched with the travel tracks for track change; initially, an upper circulation through hole of the upper joint is communicated with a circulation hole of the upper inner sleeve; the upper joint is not communicated with the upper inner sleeve after the pump is started and the pressure is suppressed, the pump is stopped and the track is changed; the pump is started again to suppress pressure until the circulation hole of the upper inner sleeve is aligned with the lower circulation through hole of the upper joint, circulation is established, and the screw drilling tool does not rotate; when the pressure is suppressed to break the blasting valve, the circulating valve is closed, and normal drilling can be realized.

Description

Multiple-switch circulating valve

Technical Field

The invention belongs to the technical field of Drilling tools in the process of oil-gas exploration and development, and mainly relates to a circulating valve which is repeatedly opened and closed and is used for protecting Drilling instruments such as MWD (Measurement While Drilling) instruments, screw Drilling tools and the like in the tripping-free operation of easily-leaked stratums.

Background

Along with the continuous deepening of exploration and development, drilling develops to deep wells and ultra-deep wells, and along with the increase of the drilling depth, the temperature in the wells is higher and higher. Due to the technical limitations of drilling instruments such as MWD, screw drill, etc., their rated operating temperature is lower than the temperature of the formation, resulting in failure to operate properly. Therefore, segmented circulation cooling is needed in the running process, and the screw drill cannot rotate when the screw drill reaches the bottom of a well in the circulation process. The existing circulating valve adopts a ball throwing type and a displacement type, the ball throwing type can only be installed at the upper end of an MWD (measurement while drilling), the cooling effect is lost in the circulating process, the displacement type can only circulate in a small displacement mode, and the circulating valve is closed after the displacement is increased, so that the cooling effect is influenced. Both of these approaches fail to meet the field requirements.

Disclosure of Invention

Aiming at part or all of the technical problems in the prior art, the invention provides a circulating valve which is opened and closed for many times and is used for circularly cooling a drilling instrument in a deep well or an ultra-deep well.

In order to achieve the above object, the present invention provides a multi-opening/closing circulation valve,

the explosion valve comprises an upper joint, an upper body, a lower body and a lower joint which are connected in sequence, and an upper inner sleeve and a lower inner sleeve which are arranged in the body, wherein the joint of the upper inner sleeve and the lower inner sleeve is provided with an explosion valve, and the upper inner sleeve and the lower inner sleeve are fixedly connected; the upper joint is provided with two groups of circulating through holes, the upper inner sleeve is arranged in the upper joint, and the circulating holes are arranged on the upper inner sleeve; wherein:

the upper end of the upper inner sleeve is provided with a first circular bead surface matched with a circular bead of the upper joint, the lower inner sleeve is provided with a second circular bead surface, an elastic piece is clamped between the second circular bead surface of the lower inner sleeve and the circular bead surface of the lower body, and the elastic piece is radially limited by the inner surfaces of the upper body and the lower body and the outer surface of the lower inner sleeve; the lower end of the lower inner sleeve is provided with travel tracks at intervals along the axial direction, the lower body is provided with a guide screw group matched with the travel tracks for rail change, and the lower inner sleeve extends downwards to exceed the guide screw group; and is configured to:

in an initial state, the upper circulation through hole of the upper joint is communicated with the circulation hole of the upper inner sleeve; the pump is started, the inner sleeve descends, and after the pressure is suppressed, the pump is stopped and the track is changed, the upper joint is not communicated with the upper inner sleeve; the pump is started again to suppress pressure until the circulation hole of the upper inner sleeve is aligned with the lower circulation through hole of the upper joint, circulation is established, and the screw drilling tool does not rotate; when the pressure is suppressed to break the blasting valve, the circulating valve is closed, and normal drilling can be realized.

In the invention, the circulating valve is arranged between the MWD and the screw drill, the circulation can be started at any time in the well entering process, and the circulating valve can be opened and closed for multiple times after entering the well, so that the simple construction process and high tool reliability are ensured.

In one embodiment, the inner sleeve is configured to:

a gap is formed between the lower end of the lower inner sleeve and the lower joint in an initial state, and the circulating hole of the upper inner sleeve is communicated with the upper circulating through hole of the upper joint when the lower inner sleeve enters the well; when the pressure building rail is pressed back to enable the inner sleeve to rotate for an angle, the circulating hole of the upper inner sleeve is not communicated with the upper circulating through hole of the upper joint; and when the circulating hole of the upper inner sleeve is communicated with the lower circulating through hole of the upper joint, the circulation is established again.

In one embodiment, the upper joint is provided with an upper group of circulating through holes and a lower group of circulating through holes along the axial direction, and each group of circulating through holes comprises at least three circulating holes circumferentially distributed along the same cross section of the upper joint; and a group of circulation holes are formed in the upper inner sleeve, and the number of the circulation holes of the upper inner sleeve is matched with that of the circulation through holes in the upper joint.

In one embodiment, the upper joint is provided with an upper group of three circulation through holes and a lower group of three circulation through holes along the axial direction, the same group of circulation through holes are circumferentially and uniformly distributed along the same cross section of the upper joint, and the upper inner sleeve is correspondingly provided with three circulation holes with the same diameter at the positions corresponding to the upper circulation through holes and the lower circulation through holes of the upper joint.

In one embodiment, the travel track of the lower inner housing includes a long and short travel track slot disposed at a lower end of the lower inner housing and is configured to: in an initial state, the circulating hole of the upper inner sleeve is communicated with the upper circulating through hole of the upper joint; when the inner sleeve changes the track to enable the guide screw group to be positioned in the short-stroke track groove, the circulating hole of the upper inner sleeve is not communicated with the upper circulating through hole and the lower circulating through hole of the upper joint; and when the rail is changed by pressure build-up again to enable the guide screw group to be positioned in the long-stroke rail groove, the circulating hole of the upper inner sleeve is communicated with the lower circulating through hole of the upper joint.

In one embodiment, the travel track groove is arranged in the middle of the lower end of the lower inner sleeve; the stroke track groove is constructed to be of a structure comprising two butted parts, a first part of the two butted parts is provided with a long stroke track groove and a short stroke track groove which are arranged at intervals, the first part is arranged at the upper end, a second part of the two butted parts is provided with an accommodating guide groove, and the accommodating guide groove is used for accommodating a guide screw group, preventing the inner sleeve from moving downwards when the pump is stopped and guiding the guide screw group to move to the next stroke track when the inner sleeve is shifted.

In one embodiment, the second part is provided with accommodating guide grooves, the number of which is the same as that of the long and short stroke track grooves, the lengths of the accommodating guide grooves are the same, and the accommodating guide grooves and the long and short stroke track grooves are arranged in a staggered manner.

In one embodiment, the side of the accommodating and guiding groove facing the reversing direction is provided with an oblique flaring, and the flaring of the long-stroke track groove and/or the flaring of the short-stroke track groove form a guiding channel of the guiding screw group correspondingly.

In one embodiment, the circulation valve is used with a temperature sensor, the circulation valve is located intermediate the MWD and the screw drill; and in the drilling process, the circulating valve realizes multiple on-off circulation according to the temperature, after the circulation is completed when the drilling tool is put into the well bottom, the pressure is suppressed to break the blasting valve, the circulation is established in the drilling tool, and the screw drilling tool normally drills after the circulating valve is closed.

In one embodiment, the upper joint, the upper body, the lower body and the lower joint are sequentially connected through drill pipe threads, and the outer diameters of the upper joint, the upper body, the lower body and the lower joint are the same; the explosion valve is made of polytetrafluoroethylene and is broken within the pressure range of 15MPa to 20 MPa.

Compared with the prior art, the invention has the advantages that:

the circulating valve capable of being opened and closed repeatedly is used for circulating cooling of drilling instruments in deep wells and ultra-deep wells, protecting screw drilling tools and preventing unnecessary risk conditions caused by rotation of the screw drilling tools in the circulating process. The tool is in a normally open state in the process of running in, can be self-grouted, can be circulated at any time as required after running in the well, and is high in implementation efficiency, safe and reliable.

Drawings

Preferred embodiments of the present invention will be described in detail below with reference to the attached drawing figures, wherein:

FIG. 1 is a schematic diagram of an embodiment of a multiple-switch cycling valve of the present invention in an initial normally open state.

Fig. 2 is a schematic diagram of the multiple-switch circulation valve of fig. 1 in a closed track-change state.

FIG. 3 is a schematic diagram of the multiple on/off cycling valve of FIG. 1 in a configuration to reestablish a cycle.

FIG. 4 is a schematic diagram illustrating the structure of the multiple on/off cycling valve burst valve of FIG. 1 closed after it has ruptured.

FIG. 5 is a half sectional view of an inner sleeve of the multiple-switch circulation valve of FIG. 1.

Fig. 6 is a perspective view of the inner sleeve of fig. 5.

In the drawings, like parts are provided with like reference numerals. The figures are not drawn to scale.

Detailed Description

In order to make the technical solutions and advantages of the present invention more apparent, exemplary embodiments of the present invention are described in further detail below with reference to the accompanying drawings. It is clear that the described embodiments are only a part of the embodiments of the invention, and not an exhaustive list of all embodiments. And the embodiments and features of the embodiments may be combined with each other without conflict.

The inventor notices in the invention process that the temperature needs to be lowered in a segmented circulation mode in the running process, and the screw drilling tool cannot rotate particularly when the screw drilling tool reaches the bottom of a well in the circulation process. The existing circulating valve adopts a ball throwing type and a displacement type, the ball throwing type can only be installed at the upper end of the MWD, and the cooling effect is lost in the circulating process. And the displacement type can only circulate in a small displacement mode, and the circulation valve is closed after the displacement is increased, so that the cooling effect is influenced.

In view of the above disadvantages, embodiments of the present invention provide a multi-turn on/off circulation valve, which will be described in detail below.

Fig. 1 is a schematic structural diagram of one embodiment of the multiple-on/off circulation valve of the present invention, in which the multiple-on/off circulation valve is in an initial normally open state, and at this time, the circulation hole 2.1 of the upper inner sleeve 2 is communicated with the upper circulation through hole 1.1 of the upper joint 1 to achieve flow circulation. Fig. 2 is a schematic structural diagram of the multi-switching circulation valve of the present invention in a closed state, in which the circulation holes 2.1 of the upper inner sleeve 2 are staggered from the circulation through holes of the upper joint 1 after the inner sleeve changes tracks, and the circulation valve is in a closed state. Fig. 3 is a schematic structural diagram of the multiple-opening/closing circulation valve of the present invention when it is opened again to establish a flow circulation, in which the circulation hole 2.1 of the upper inner case 2 is communicated with the lower circulation through hole 1.2 of the upper joint 1. Fig. 4 is a schematic structural diagram of the multiple-opening-closing circulation valve of fig. 1, which is closed after the explosion valve 3 is broken, in which state, a high pressure is held to break the explosion valve 3, the inner sleeve rebounds under the restoring force of the elastic member 6, the circulation hole of the circulation valve is closed, and the circulation in the pipe can be performed. Fig. 5 is a schematic view showing a half-sectional structure of an inner case of the multi-opening/closing circulation valve of the present invention. Fig. 6 is a perspective view of the inner sleeve of fig. 5.

Fig. 1 to 4 show one embodiment of the multi-switch circulation valve according to the invention. In this embodiment, the multiple-switch circulation valve of the present invention mainly comprises: the device comprises an upper joint 1, an upper inner sleeve 2, a blasting valve 3, an upper body 4, a lower inner sleeve 5, an elastic piece 6, a guide screw group 7, a lower body 8 and a lower joint 9. Wherein, the upper joint 1, the upper body 4, the lower body 8 and the lower joint 9 are fixedly connected through threads in sequence. The upper inner sleeve 2 and the lower inner sleeve 5 are arranged in the body formed by the upper body 4 and the lower body 8. The explosion valve 3 is arranged at the joint of the upper inner sleeve 2 and the lower inner sleeve 5, and the upper inner sleeve 2 is fixedly connected with the lower inner sleeve 5 through a fastener after being in threaded connection. The upper joint 1 is provided with an upper circulation through hole 1.1 and a lower circulation through hole 1.2, and the upper inner sleeve 2 is arranged in the upper joint 1 and provided with a group of circulation holes 2.1.

In one embodiment, as shown in fig. 1 to 4, the upper end of the upper inner sleeve 2 is provided with a first shoulder surface that mates with the shoulder of the upper joint 1. The lower inner sleeve 5 is provided with a second shoulder surface, and the elastic part 6 is clamped between the second shoulder surface of the lower inner sleeve 5 and the shoulder surface of the lower body 8. The elastic member 6 is restricted by the inner surfaces of the upper and

lower bodies

4, 8 and the outer surface of the lower inner sleeve 5. The lower end of the lower inner sleeve 5 is provided with travel tracks at intervals along the axial direction, and a guide screw group 7 matched with the travel tracks for track change is arranged on the lower body 8. The lower end of the lower inner sleeve 5 extends downward beyond the position of the guide screw group 7 along the inner surface of the lower body 8.

In one embodiment, the multiple-switch circulation valve of the present invention is disposed intermediate the MWD and the screw drill, as shown in fig. 1-4. In an initial state, the upper circulation through hole 1.1 of the upper joint 1 is communicated with the circulation hole 2.1 of the upper inner sleeve 2. When circulation is needed, the pump is started, the inner sleeve (comprising the upper inner sleeve 2 and the lower inner sleeve 5) descends, the upper joint 1 is not communicated with the upper inner sleeve 2, pressure is suppressed, and the pump is stopped and rail is changed. After rail replacement, as shown in fig. 2, the circulation hole 2.1 of the upper inner sleeve 2 and the upper circulation through hole 1.1 of the upper joint 1 are staggered by an angle, and the circulation valve is closed. When the pump is started again to suppress pressure, the inner sleeve moves downwards, the circulation hole 2.1 of the upper inner sleeve 2 is aligned with the lower circulation through hole 1.2 of the upper joint 1 to establish circulation, and the screw drilling tool does not rotate in the process. And (3) switching tracks after stopping the pump, staggering an angle between the circulation hole 2.1 of the upper inner sleeve 2 and the lower circulation through hole 1.2 of the upper joint 1, and continuing to suppress pressure until the pressure is suppressed to ensure that the screw drill can normally drill after the explosion valve 3 is broken. The circulating valve can be opened and closed for many times at any time in the well entering process, the circulating valve can be opened and closed for many times after entering the well, so that segmented cooling or circulating cooling is realized, and the areas of the circulating through hole of the lower joint 1 and the circulating hole 2.1 of the upper inner sleeve 2 can be set according to requirements, so that segmented large-flow circulation can be realized, the simplicity and convenience in construction process are ensured, and the reliability of tools is high.

In one embodiment, as shown in fig. 1, the inner sleeve is configured to: in the initial state, a gap is formed between the lower end of the lower inner sleeve 5 and the lower joint 9. When the well enters, the circulating holes 2.1 of the upper inner sleeve 2 are communicated with the upper circulating through holes 1.1 of the upper joint 1, so that the circulation can be started at any time in the well entering process.

In one embodiment, as shown in fig. 2, when the pressure-building rail switches the inner sleeve to rotate for an angle, the circulation hole 2.1 of the upper inner sleeve 2 is not communicated with the upper circulation through hole 1.1 of the upper joint 1. In one embodiment, as shown in fig. 3, when the pump is stopped and the rail is switched to be pressurized again until the circulation hole 2.1 of the upper inner sleeve 2 is communicated with the lower circulation through hole 1.2 of the upper joint 1, circulation is established again.

In one embodiment, as shown in fig. 1 to 4, the upper joint 1 is provided with upper and lower sets of circulation through holes 1.1, 1.2 in the axial direction (left-right direction in fig. 1). Each group of circulating through holes comprises at least three circulating holes which are circumferentially distributed along the same cross section of the upper joint. Correspondingly, the upper inner sleeve 2 is provided with a group of circulation holes 2.1, and it is easy to understand that the number of the circulation holes 2.1 of the upper inner sleeve 2 is matched with the number of the circulation through holes on the upper joint 1. In addition, it is easy to understand that the stroke track of the lower inner sleeve 5 is generally required to be arranged to be matched with the position of the circulating hole, and in order to meet the requirement of large-flow circulation, the circulating hole 2.1 and the circulating through hole are arranged to be in the same line with the stroke track corresponding to the lower inner sleeve 5, so that the circulating valve is ensured to be in a fully-opened large-flow or fully-closed state.

In a preferred embodiment, as shown in fig. 1 to 4, the upper joint 1 is provided with two sets of three circulation through holes, one set being upper and the other set being lower, in the axial direction. And the same group of circulating through holes are uniformly distributed along the same cross section of the upper joint 1 in the circumferential direction. The upper inner sleeve 2 is correspondingly provided with three circulating holes 2.1 with the same diameter at the positions corresponding to the upper circulating through holes 1.1 and the lower circulating through holes 1.2 of the upper joint 1.

In one embodiment, as shown in fig. 1-4, the burst valve 3 is made of teflon and the burst valve 3 is configured to rupture at a pressure in the range of 15MPa to 20 MPa. It will be readily understood that the burst valve 3 will be marked with a burst pressure, e.g. 15MPa, after finishing, and that the burst valve 3 will burst when the burst pressure reaches 15 MPa.

In one embodiment, as shown in fig. 5 and 6, the stroke rail includes a long and short stroke rail groove provided at the lower end of the lower inner sleeve 5. And is configured to: in the initial state, the circulating holes 2.1 of the upper inner sleeve 2 are communicated with the upper circulating through holes 1.1 of the upper joint 1. When the pump is started to suppress pressure, the lower inner sleeve 5 changes the track, and the guide screw group 7 is positioned in the short-stroke track groove 5.2, the circulating hole 2.1 of the upper inner sleeve 2 is staggered with the upper and lower circulating through holes 1.1 and 1.2 of the upper joint 1, so that the upper and lower circulating through holes are not communicated, and the circulating valve is closed. And (3) changing the rail again to build high pressure, moving the inner sleeve downwards, enabling the guide screw group 7 to be positioned in the long-stroke rail groove 5.1, and enabling the circulating hole 2.1 of the upper inner sleeve 2 to be communicated with the lower circulating through hole 1.2 of the upper joint 1.

In one embodiment, as shown in fig. 5 and 6, a long and short stroke track groove is provided in the middle of the lower end of the lower inner sleeve 5. The travel track groove is configured to have a two-part butt configuration. The first part of the two butted parts is provided with long-stroke track grooves 5.1 and short-stroke track grooves 5.2 which are arranged at intervals, and the first part is arranged at the left end. The second of the two butt-jointed parts is provided with an accommodating guide groove 5.3. The accommodating guide groove 5.3 is configured to: accommodating the guide screw set 7, preventing the inner sleeve from moving downward when the pump is stopped, and guiding the guide screw set 7 to move to the next stroke track when the inner sleeve changes tracks.

In one embodiment, as shown in fig. 5 and 6, the second part is provided with accommodating guide grooves 5.3, the number of which is the same as that of the long and short stroke track grooves. The lengths of the accommodating guide grooves 5.3 are the same, and the accommodating guide grooves and the long-stroke and short-stroke track grooves are arranged in a staggered mode.

In one embodiment, as shown in fig. 5 and 6, the accommodating guide groove 5.3 is provided with an oblique flare towards the side of the reversal. The flared end forms a guide channel of the guide screw set 7 corresponding to the flared end of the long-stroke track groove 5.1 and/or the flared end of the short-stroke track groove 5.2.

In an embodiment not shown, the circulation valve is used with a temperature sensor, the circulation valve being located intermediate the MWD and the screw drill. And in the drilling process, the circulating valve realizes multiple on-off circulation according to the temperature, after the circulation is completed when the drilling tool is put into the well bottom, the pressure is suppressed to break the blasting valve 3, the circulation is established in the drilling tool, and the screw drilling tool normally drills after the circulating valve is closed.

In one embodiment, as shown in fig. 1 to 6, the upper joint 1, the upper body 4, the lower body 8 and the lower joint 9 are sequentially connected by a drill rod thread, and have the same outer diameter. The adoption of drill rod threads mainly ensures the safety of the circulating valve after entering the well. The lower part of the lower inner sleeve 5 is provided with a travel track groove, and the total number of the travel track groove is six tracks, wherein the odd tracks are longer, and the even tracks are shorter. The upper inner sleeve 2 is provided with a group of circulation holes, and the group of circulation holes comprises three circulation holes 2.1. The lower inner sleeve 5 is arranged inside the body and is supported by the reset elastic piece 6. The guide screw group 7 mainly comprises three parts, namely a guide screw, a screw protective sleeve and a pressing cap, the guide screw group 7 can freely rotate in a screw hole of the lower body 8, and rail replacement failure caused by overlarge friction force in the rail replacement process is prevented.

In one embodiment, as shown in fig. 1 to 4, the operation principle of the multi-switching circulation valve of the present invention comprises: during well entry, the circulation valve is located at the lower part of the MWD and the upper part of the screw drill. The circulating hole 2.1 of the upper inner sleeve 2 of the circulating valve is aligned with the upper circulating through hole 1.1 of the upper joint 1 and is in a normally open state. The circulating valve enters the well while drilling, the pump is started, the inner sleeve descends, the pump is stopped under the pressure build-up pressure of 7MPa to 10MPa, the inner sleeve is switched under the reset action of the reset elastic piece 6, and the circulating hole 2.1 of the upper inner sleeve 2 is staggered with the upper circulating through hole 1.1 of the upper joint 1. And (3) building circulation by suppressing pressure again, the screw drilling tool cannot be started, the inner sleeve is changed tracks again after the pump is stopped, the circulation hole 2.1 of the upper inner sleeve 2 is aligned with the lower circulation through hole 1.2 of the upper joint 1, and the circulation frequency is not limited. After the circulation is completed after the drilling tool is lowered to the bottom of the well, the pump is stopped, the pressure is held back to about 15-20MPa again, the blasting valve 3 is broken, the circulation is established in the drilling tool, the circulating valve is closed, and the drilling can be normally carried out. Because the inner sleeve has no differential pressure surface, the circulating valve cannot be opened in the normal drilling process.

While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, the appended claims are intended to be construed to include preferred embodiments and all such changes and/or modifications as fall within the scope of the invention, and all such changes and/or modifications as are made to the embodiments of the present invention are intended to be covered by the scope of the invention.

Claims

1. A circulating valve capable of being switched on and off repeatedly is characterized by comprising an upper joint, an upper body, a lower joint, an upper inner sleeve and a lower inner sleeve, wherein the upper joint, the upper body, the lower body and the lower joint are sequentially connected; the upper joint is provided with two groups of circulating through holes, the upper inner sleeve is arranged in the upper joint, and the circulating holes are arranged on the upper inner sleeve; wherein:

2. The multiple-switch circulation valve of claim 1, wherein the inner sleeve is configured to:

3. The multiple-switching circulation valve according to claim 1 or 2, wherein the upper joint is provided with two sets of upper and lower circulation through holes in the axial direction, each set of circulation through holes comprising at least three circulation holes circumferentially distributed along the same cross section of the upper joint; and a group of circulation holes are formed in the upper inner sleeve, and the number of the circulation holes of the upper inner sleeve is matched with that of the circulation through holes in the upper joint.

4. The multiple switching circulation valve according to claim 3, wherein the upper joint is provided with two sets of three circulation holes along the axial direction, the circulation holes in the same set are circumferentially and uniformly distributed along the same cross section of the upper joint, and the upper inner sleeve is provided with three circulation holes having the same diameter corresponding to the positions of the upper circulation hole and the lower circulation hole of the upper joint.

5. The multiple-switch circulation valve of any one of claims 1-4, wherein the travel track of the lower inner housing comprises a long and short travel track slot disposed at a lower end of the lower inner housing and is configured to: in an initial state, the circulating hole of the upper inner sleeve is communicated with the upper circulating through hole of the upper joint; when the inner sleeve changes the track to enable the guide screw group to be positioned in the short-stroke track groove, the circulating hole of the upper inner sleeve is not communicated with the upper circulating through hole and the lower circulating through hole of the upper joint; and when the rail is changed by pressure build-up again to enable the guide screw group to be positioned in the long-stroke rail groove, the circulating hole of the upper inner sleeve is communicated with the lower circulating through hole of the upper joint.

6. The multiple-switch circulation valve of claim 5, wherein the travel track groove is disposed in a lower middle portion of the lower inner sleeve; the stroke track groove is constructed to be of a structure comprising two butted parts, a first part of the two butted parts is provided with a long stroke track groove and a short stroke track groove which are arranged at intervals, the first part is arranged at the upper end, a second part of the two butted parts is provided with an accommodating guide groove, and the accommodating guide groove is used for accommodating a guide screw group, preventing the inner sleeve from moving downwards when the pump is stopped and guiding the guide screw group to move to the next stroke track when the inner sleeve is shifted.

7. The multiple-switching circulation valve according to claim 6, wherein the second portion has receiving guide slots having the same number as the long and short stroke track slots, the receiving guide slots have the same slot length, and the receiving guide slots are disposed alternately with the long and short stroke track slots.

8. The multiple-switching circulation valve according to claim 7, wherein the accommodating guide groove is provided with an oblique flared opening on a side facing the reverse direction, and the flared opening forms a guide passage of the guide screw set in correspondence with the flared opening of the long-stroke track groove and/or the flared opening of the short-stroke track groove.

9. Multiple-switch circulation valve according to any of claims 1 to 8, characterized in that it is used with a temperature sensor, the circulation valve being located intermediate the MWD and the screw drill; and in the drilling process, the circulating valve realizes multiple on-off circulation according to the temperature, after the circulation is completed when the drilling tool is put into the well bottom, the pressure is suppressed to break the blasting valve, the circulation is established in the drilling tool, and the screw drilling tool normally drills after the circulating valve is closed.

10. The multiple-switch circulation valve of claim 1, wherein the upper sub, the upper body, the lower body, and the lower sub are sequentially threaded through drill rods and have the same outside diameter; the explosion valve is made of polytetrafluoroethylene and is broken within the pressure range of 15MPa to 20 MPa.