CN113944437A - High-pressure mud manifold and using method thereof - Google Patents

Abstract

The invention relates to the technical field of petroleum drilling, in particular to a high-pressure mud manifold and a use method thereof. The invention has good damping effect, simple and convenient operation and control, reduces the labor intensity of field workers, improves the safety coefficient and meets the explosion-proof and safety requirements of a drilling field.

Description

High-pressure mud manifold and using method thereof

Technical Field

The invention relates to the technical field of petroleum drilling, in particular to a high-pressure mud manifold and a using method thereof.

Background

The high-pressure mud manifold is necessary equipment for improving the drilling speed in high-pressure jet drilling, and is used for inputting high-pressure mud slurry into an inner cavity of a drill rod and spraying the high-pressure mud slurry out of a drill rod bit by means of control of a valve group so as to generate high-pressure mud torrent, so that high-pressure jet drilling is realized, the drilling speed is greatly improved, and the drilling cost is reduced. At present, although a high-pressure slurry circulation manifold has a guarantee on the pressure bearing capacity, the high-pressure slurry circulation manifold is not humanized enough in design, and has the problems of inconvenient use, large vibration and the like. In addition, most of valves in the valve group are manual valves, the valves are manually controlled to be opened and closed on site by workers, the labor intensity is high, the danger coefficient is high, and casualties are extremely easy to cause if the operation is wrong or the quality of equipment is poor. Therefore, a high-pressure slurry circulation manifold which is reasonable in structure, safe, reliable and capable of greatly saving manpower is needed.

Disclosure of Invention

In order to solve at least one of the technical problems, the invention provides a high-pressure mud manifold which comprises a drill floor valve group, wherein the drill floor valve group is respectively connected with a mud pump and a vertical pipe, the mud pump is connected with a mud circulation tank, the vertical pipe is connected with a drill rod drill bit, the drill floor valve group comprises a prying seat, a flat gate valve, an electric valve group, a mud pump interface group, a one-way valve group and a connecting pipeline are arranged on the prying seat, the flat gate valve is arranged between the mud circulation tank and the electric valve group, the mud pump interface group is arranged between the electric valve group and the one-way valve group, and the one-way valve group is connected with the vertical pipe.

Preferably, the high-pressure mud manifold comprises a single-pump operation mode, a double-pump operation mode and a protection mode, wherein one mud pump is started in the single-pump operation mode, a mud pipeline is limited through a drill floor valve group, two mud pumps are started in the double-pump operation mode, two mud pipelines are limited through the drill floor valve group, and a mud pressure relief pipeline is started in the protection mode through the drill floor valve group.

Preferably, the electric valve bank comprises a first electric valve, a second electric valve and a third electric valve, the mud pump interface bank comprises a first mud pump interface and a second mud pump interface, the check valve bank comprises a first check valve and a second check valve, the first mud pump interface is arranged between the first electric valve and the first check valve, the second mud pump interface is arranged between the second electric valve and the second check valve, and the third electric valve is arranged between the first electric valve and the second electric valve in parallel.

Preferably, the first one-way valve and the second one-way valve have the same structure and comprise a hollow shell, a slurry inlet and a slurry outlet are respectively formed in two ends of the shell, a valve seat and a valve core are sequentially arranged in the shell along the slurry flowing direction, the valve core is connected with one end of a spring, the other end of the spring is fixed on the shell, a cylindrical cavity is formed in the valve core, slurry flows into the slurry outlet through the cavity, the cavity comprises an inlet section, a damping section and an outlet section, and the inner diameters of the inlet section and the damping section are the same.

Preferably, the valve core comprises a valve core body, the valve core body comprises a plugging portion and a sliding portion which are sequentially connected, the plugging portion can be abutted to and plugged with the valve seat, annular flanges are respectively arranged at two ends of the outer side wall of the sliding portion and slidably abutted to the inner side wall of the shell, an annular first groove is formed in the circumference of the inner side wall of the sliding portion, a first elastomer sleeve is embedded in the inner side wall of the sliding portion in a sealing mode and forms a closed first air cavity together with the first groove, the first air cavity is located in the damping section, and the inner diameter of the first elastomer sleeve is consistent with the inner diameter of the damping section.

Preferably, a flow stabilizing mechanism is arranged in the cavity and comprises a long spherical body, a first fixing shaft and a second fixing shaft, the first fixing shaft and the second fixing shaft are arranged at two ends of the long spherical body, the long spherical body is positioned in the damping section, and the central line of the flow stabilizing mechanism is matched with the central line of the cavity; a grid is arranged at the joint of the damping section and the outlet section, the grid comprises a central disc and support columns which are arranged on the central disc at equal intervals on the circumference, and the support columns are fixed on the inner side wall of the damping section; one end of the flow stabilizing mechanism is fixed on the inner end face of the cavity inlet section, and the other end of the flow stabilizing mechanism is fixed on the central disc.

Preferably, the long spherical body comprises a cylinder, second spherical head portions are respectively arranged at two ends of the cylinder, one of the second spherical head portions is connected with the first fixing shaft, the other one of the second spherical head portions is connected with the second fixing shaft, an annular second groove is formed in the circumference of the outer side wall of the cylinder, a second elastic sleeve is hermetically sleeved on the outer circumference of the cylinder, the outer diameter of the second elastic sleeve is equal to the diameter of the second spherical head portion, and a sealed second air cavity is defined by the second elastic sleeve and the second groove.

Preferably, the valve seat comprises a valve seat body, and a cylindrical hole and a spherical hole which are arranged in the center of the valve seat body and are communicated with each other; the cylindrical hole is communicated with the slurry inlet, the spherical hole is matched with the valve core, the plugging part of the valve core body comprises a first semicircular spherical head part for plugging the spherical hole and a neck part extending along the bottom surface of the first spherical head part, and the neck part is radially provided with a through hole communicated with the inlet section in the cavity.

Preferably, an annular piston is arranged at one end, close to the slurry outlet, of the sliding part, a limiting mechanism is arranged on the inner wall of the shell, close to one end of the slurry outlet, the limiting mechanism comprises an inner ring and an outer ring which are sleeved at intervals, the inner ring, the outer ring and the shell jointly enclose a sliding cavity corresponding to the annular piston, and the inner diameter of the inner ring is equal to the inner diameter of the damping section; the side wall of the annular piston is axially provided with a guide groove, and a guide bulge corresponding to the guide groove is arranged in the sliding cavity.

The invention provides a use method of a high-pressure slurry manifold, which comprises the following steps:

step S100, a single-pump operation mode specifically comprises the following steps:

step S110, in the drilling process, a single slurry pump runs, the other slurry pump is in a standby state, at the moment, the first electric valve, the second electric valve and the third electric valve are all closed, slurry enters a vertical pipe through the second slurry pump interface and the second check valve in sequence, and enters a drill bit of a drill rod through the vertical pipe to perform high-pressure slurry circulation in the well;

step S120, when the mud pump enters winter, a first electric valve and a flat gate valve corresponding to the other standby mud pump are started, and the standby mud pump is intermittently started to perform low-pressure circulation in a mud circulation tank, so that a low-pressure pipeline is prevented from being frozen;

step S200, a double-pump running mode,

in the drilling process, two mud pumps run simultaneously, the first electric valve, the second electric valve and the third electric valve are all closed, mud sequentially passes through the first mud pump interface and the second mud pump interface, respectively enters the vertical pipe through the first check valve and the second check valve, and enters the drill bit of the drill rod through the vertical pipe to perform high-pressure mud circulation in the well;

step S300, a protection mode, which specifically comprises the following steps:

step S310, opening a third electric valve for pressure relief when pressure relief is needed in an emergency;

and step S320, when one of the first electric valve, the second electric valve and the third electric valve in the electric valve group leaks, closing the flat gate valve, and forcibly performing high-pressure mud circulation in the well.

Compared with the prior art, the invention has the following beneficial technical effects:

1. the electric valve bank and the check valve bank are matched with each other, the flow direction of slurry in a rated pressure range is changed, the operation and the control are simple and convenient, the labor intensity of field workers is reduced, the safety coefficient is improved, and the explosion-proof and safety requirements of a drilling field are met;

2. the invention comprises a single-pump operation mode, a double-pump operation mode and a protection mode, has wide application range and flexible adjustment;

3. the one-way valve structure with a damping effect is adopted, the damping section is arranged in the cavity of the valve core, the vibration of high-pressure slurry on a pipeline can be reduced, the inner diameters of the inlet section and the damping section are consistent, the high-pressure slurry flow disorder caused by a step formed by inconsistent aperture can be avoided, and the vibration can be further reduced when the high-pressure slurry flows into the damping section stably;

4. the first elastic sleeve and the first groove are encircled to form a closed first air cavity to form a damping structure, high-pressure slurry exerts radial force on the first elastic sleeve, the first elastic sleeve is compressed and deforms towards the direction of the first air cavity, the flow passing volume of the high-pressure slurry is increased, the fluid pressure can be reduced, the vibration is inhibited, the inner diameter of the first elastic sleeve is consistent with that of the damping section, the flowing disorder of the high-pressure slurry caused by steps formed by inconsistent aperture can be avoided, the high-pressure slurry flows in the damping section stably, and the vibration is further reduced;

5. the inner circular ring, the damping section of the cavity and the slurry outlet form a fluid passage with equal diameter, high-pressure slurry stably enters the fluid passage from the damping section and finally enters the slurry outlet, so that the fluid turbulence caused by the step is reduced, and the damping effect is further improved;

6. the high-pressure slurry in the damping section is stabilized through the flow stabilizing mechanism, the high-pressure slurry forms stable laminar flow in the damping section, and the vibration is further reduced by matching with a damping structure on the flow stabilizing mechanism;

in conclusion, the shock absorption device has the advantages of good shock absorption effect, simple and convenient operation and control, reduces the labor intensity of field workers, improves the safety coefficient, and meets the explosion-proof and safety requirements of a drilling field.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic diagram of a valve set on a drill floor;

FIG. 3 is a schematic view of the operating conditions of the single pump mode of operation;

FIG. 4 is a schematic view of the operating state of the single pump operating mode after the low pressure cycle is on;

FIG. 5 is a schematic view of the operating conditions in the dual pump mode of operation;

FIG. 6 is a schematic diagram of the working state of the protection mode;

FIG. 7 is a schematic view of a first check valve;

FIG. 8 is a schematic view of the valve seat and poppet;

FIG. 9 is a schematic structural view of the valve cartridge body;

FIG. 10 is a schematic structural view of a flow stabilizing mechanism;

FIG. 11 is a schematic structural view of a position-limiting mechanism;

fig. 12 is a schematic structural view of the check valve in a forward flow state of high-pressure mud.

Description of reference numerals:

01. a mud circulating tank 02, a mud pump 03, a valve group of a drilling platform 04, a vertical pipe 05 and a drill bit,

1. a prying seat, 2 a flat gate valve, 3 an electric valve set, 4 a slurry pump interface set, 5 a check valve set,

31. a first electric valve 32, a second electric valve 33, a third electric valve 41, a first mud pump interface 42, a second mud pump interface 51, a first check valve 52, a second check valve,

100. the piston comprises a shell, 200, a slurry inlet, 300, a slurry outlet, 400, a valve seat, 410, a valve seat body, 420, a cylindrical hole, 430, a spherical hole, 500, a valve core, 510, a valve core body, 511, a blocking part, 5111, a first ball head part, 5112, a neck part, 5113, a through hole, 512, a sliding part, 5121, a first groove, 5122, a first elastomer sleeve, 5123, a first air cavity, 5124, an annular flange, 513, an annular piston, 5131, a guide groove, 520, a cavity, 521, an inlet section, 522, a shock absorbing section, 523, an outlet section, 530, a flow stabilizing mechanism, 531, a long ball body, 5311, a cylinder, 5312, a second ball head part, 5313, a second groove, 5314, a second elastic sleeve, 5315, a second air cavity, 532, a first fixed shaft, 533, a second fixed shaft, 540, a grid, 541, a center, 542, a support column, 600, a spring, 700, a limiting mechanism, 710, an inner circular ring, 720, 710, an inner circular ring, a sealing part, outer ring 730, sliding cavity 731 and guide projection.

Detailed Description

The following description of the embodiments of the present invention refers to the accompanying drawings and examples:

it should be noted that the structures, proportions, sizes, and other dimensions shown in the drawings and described in the specification are only for the purpose of understanding and reading the present disclosure, and are not intended to limit the scope of the present disclosure, which is defined by the following claims, and all modifications of the structures, changes in the proportions and adjustments of the sizes and other dimensions which are within the scope of the disclosure should be understood and encompassed by the present disclosure without affecting the efficacy and attainment of the same. In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as a scope of the present invention.

Example 1

With reference to fig. 1 and 2, the present embodiment provides a high-pressure mud manifold, including drill floor valve group 03, drill floor valve group 03 connects slush pump 02 and riser 04 respectively, slush pump 02 connects mud circulation jar 01, riser 04 connects drilling rod drill bit 05, drill floor valve group 03 includes sled seat 1, be equipped with flat gate valve 2, electric valve group 3, slush pump interface group 4, check valve group 5 and connecting line on sled seat 1, flat gate valve 2 locate mud circulation jar 01 with between the electric valve group 3, slush pump interface group 4 locate electric valve group 3 with between check valve group 5, check valve group 5 connects riser 04.

In the technical scheme, the mud for drilling is contained in the mud circulation tank 01, the mud pump 02 pumps the mud in the mud circulation tank 01 to the mud pump interface group 4 of the drill floor valve group 03 at high pressure, and the mud pump interface group 4 comprises mud pump interfaces the number of which is consistent with that of the mud pumps 02; high-pressure mud enters a connecting pipeline through a mud pump interface group 4 and flows to a vertical pipe 04 through a flow path defined by an electric valve group 3 and a check valve group 5, wherein the electric valve group 3 comprises a plurality of low-pressure electric valves, and the check valve group 5 comprises high-pressure check valves with the same number as that of the mud pumps 02; high-pressure mud enters the inner cavity of a drill rod of the drill rod drill bit 05 from the stand pipe 04 and is sprayed out of the drill bit, high-pressure mud torrent is generated, and high-pressure jet drilling is achieved.

In the embodiment, the electric valve group 3 is adopted to replace a conventional manual low-pressure valve, the check valve group 5 is adopted to replace a conventional high-pressure manual valve, the electric valve group and the check valve group are matched with each other to change the slurry flow direction within a rated pressure range, the operation control is simple and convenient, the reaction speed is high, the operation time is greatly reduced, the labor intensity of field workers is reduced, and the explosion-proof and safety requirements of a drilling field are met; the electric valve group 3 can realize remote control in safe and convenient-to-operate areas such as a remote driller room through a remote control system, so that the safety factor is improved, and potential safety hazards are avoided.

Preferably, the electric valves in the electric valve group 3 include electric operation mode and manual operation mode, and in case of field circuit failure, manual operation of the valves can be realized.

Example 2

With reference to fig. 2 to 6, on the basis of embodiment 1, the present embodiment provides a high-pressure mud manifold having multiple operation modes, where the high-pressure mud manifold includes a single-pump operation mode, a double-pump operation mode, and a protection mode, the single-pump operation mode enables one mud pump 02, one mud pipeline is defined by a rig floor valve group 03, the double-pump operation mode enables two mud pumps 02, two mud pipelines are defined by the rig floor valve group 03, and the protection mode opens a mud pressure relief pipeline by the rig floor valve group 03.

The electric valve group 3 comprises a first electric valve 31, a second electric valve 32 and a third electric valve 33, the mud pump interface group 4 comprises a first mud pump interface 41 and a second mud pump interface 42, the check valve group 5 comprises a first check valve 51 and a second check valve 52, the first mud pump interface 41 is arranged between the first electric valve 31 and the first check valve 51, the second mud pump interface 42 is arranged between the second electric valve 32 and the second check valve 52, and the third electric valve 33 is arranged between the first electric valve 31 and the second electric valve 32 in parallel.

In the above technical solution, two slurry pumps are provided, in the single-pump operation mode, only one slurry pump is started, and the other slurry pump is standby, as shown in fig. 3, the first electric valve 31, the second electric valve 32 and the third electric valve 33 are closed, the slurry pumps the high-pressure slurry to the second slurry pump interface 42, the high-pressure slurry flows into the stand pipe through the second check valve 52, and finally enters the drill bit via the stand pipe (not shown in the figure), thereby completing the single-pump operation mode; after entering winter, the weather is cold, as shown in fig. 4, the first electric valve 31 and the flat gate valve 2 corresponding to another spare mud pump are opened, and the spare mud pump can be intermittently started to perform low-pressure circulation in the mud circulation tank, so that the low-pressure pipeline is prevented from freezing.

In the dual-pump operation mode, two mud pumps are started simultaneously, as shown in fig. 5, the first electric valve 31, the second electric valve 32 and the third electric valve 33 are closed, the two mud pumps pump high-pressure mud to the first mud pump interface 41 and the second mud pump interface 42 respectively, the high-pressure mud flows into the riser through the first check valve 51 and the second check valve 52 respectively, and finally enters the drill bit via the riser (not shown in the figure), and the dual-pump operation mode is completed;

when the sudden situations that the well wall collapses, the water hole is blocked, the mud circulation resistance is increased to cause the pump holding of the drilling pump and the like occur in the drilling process, the third electric valve 33 can be opened to release the pressure; when one of the first, second and third electric valves 31, 32, 33 leaks, the plate gate valve 2 can be closed, as shown in fig. 6, to force high pressure mud circulation in the well.

Example 3

With reference to fig. 7 to 12, the present embodiment provides a high-pressure check valve structure with a shock absorption effect, the first check valve 51 and the second check valve 52 have the same structure, and include a hollow housing 100, two ends of the housing 100 are respectively provided with a slurry inlet 200 and a slurry outlet 300, a valve seat 400 and a valve core 500 are sequentially disposed in the housing 100 along a slurry flow direction, the valve core 500 is connected to one end of a spring 600, the other end of the spring 600 is fixed to the housing 100, a cylindrical cavity 520 is disposed in the valve core 500, slurry flows into the slurry outlet 300 through the cavity 520, the cavity 520 includes an inlet section 521, a shock absorption section 522 and an outlet section 523, and inner diameters of the inlet section 521 and the shock absorption section 522 are the same.

In the above technical solution, as shown in fig. 8, the high-pressure mud flows out of the first check valve 51 through the cavity 520 of the valve core 500, the damping section 522 is disposed in the cavity 520, the damping section 522 can reduce vibration of the high-pressure mud on the pipeline, and the damping section 522 can adopt any structural design having a damping effect in the prior art. The inner diameters of the inlet section 521 and the damping section 522 are consistent, so that the flow disorder of high-pressure mud caused by a step formed by inconsistent hole diameters can be avoided, the high-pressure mud can stably flow into the damping section 522, and the vibration is further reduced.

As shown in fig. 8 and 9, in the present embodiment, a preferable technical solution of the valve element 500 is provided, where the valve element 500 includes a valve element body 510, the valve element body 510 includes a blocking portion 511 and a sliding portion 512 which are sequentially connected, the blocking portion 511 can abut against and block the valve seat 400, two ends of an outer side wall of the sliding portion 512 are respectively provided with an annular flange 5124, the annular flange 5124 abuts against an inner side wall of the housing 100 in a sliding manner, an annular first groove 5121 is circumferentially arranged on the inner side wall of the sliding portion 512, a first elastic sleeve 5122 is embedded in the inner side wall of the sliding portion 512 in a sealing manner, and forms a closed first air cavity 5123 together with the first groove 5121, the first air cavity 5123 is located in the damper segment 522, and an inner diameter of the first elastic sleeve 5122 is consistent with an inner diameter of the damper segment 522.

In the above technical solution, a first elastic body sleeve 5122 and a first groove 5121 enclose a closed first air cavity 5123 to form a damping structure, the first elastic body sleeve 5122 is preferably made of hydrogenated nitrile butadiene rubber, and the closed cell ratio of the foam is greater than 90%. The high pressure mud exerts a radial force on the first elastomer sleeve 5122, the first elastomer sleeve 5122 is compressed, and meanwhile, the first elastomer sleeve 5113 deforms in the direction of the first air cavity 5213, the flow volume of the high pressure mud is increased, the fluid pressure can be reduced, and the vibration can be inhibited. The inner diameter of the first elastic sleeve 5122 is consistent with the inner diameter of the damping section 522, so that the flow disorder of high-pressure mud caused by a step formed by inconsistent hole diameters can be avoided, the high-pressure mud can stably flow in the damping section 522, and the vibration is further reduced. The bottom surface with the arc-shaped curved surface is preferably adopted in the first groove 5121, so that on one hand, stress concentration can be reduced by the smooth arc-shaped curved surface, the service life of the valve core is prolonged, and on the other hand, the adaptability of the arc-shaped curved surface and the first elastic sleeve 5122 during deformation is better.

Preferably, as shown in fig. 8 and 9, the valve seat 400 includes a valve seat body 410, and a cylindrical hole 420 and a spherical hole 430 which are provided at the center of the valve seat body 410 and communicate with each other; the cylindrical hole 420 is communicated with the slurry inlet 200, the spherical hole 430 is matched with the valve core 500, the blocking part 511 of the valve core body 510 comprises a semicircular first ball head part 5111 for blocking the spherical hole 430 and a neck part 5112 extending along the bottom surface of the first ball head part 5111, and the neck part 5112 is radially provided with a through hole 5113 communicated with the inlet section 521 in the cavity 520.

In the above technical solution, the cylindrical hole 420 preferably has the same inner diameter as the slurry inlet 200, so as to reduce the fluid turbulence caused by the step, the first ball head 5111 and the neck 5112 form a long semicircle, and the first ball head 5111 can smoothly divide the high-pressure slurry entering from the slurry inlet 200, and then the high-pressure slurry enters the cavity 520 through the neck 5112, so as to reduce the vibration.

Preferably, as shown in fig. 9 and 11, an annular piston 513 is disposed at one end of the sliding portion 512 close to the mud outlet 300, a limiting mechanism 700 is disposed on an inner wall of the housing 100 close to one end of the mud outlet 300, the limiting mechanism 700 includes an inner ring 710 and an outer ring 720 that are sleeved at an interval, the inner ring 710, the outer ring 720 and the housing 100 together enclose a sliding chamber 730 corresponding to the annular piston 513, and an inner diameter of the inner ring 710 is equal to an inner diameter of the shock absorbing section 522; the side wall of the annular piston 513 is axially provided with a guide groove 5131, and a guide protrusion 731 corresponding to the guide groove 5131 is arranged in the sliding cavity 730.

In the above technical solution, when the high-pressure slurry flows in the forward direction, as shown in fig. 12, the valve core 500 slides towards the slurry outlet 300, the spring 600 compresses, the annular piston 513 is completely inserted into the sliding chamber 730, at this time, the inner ring 710, the damping section 522 of the cavity 520 and the slurry outlet 300 form a fluid passage with the same diameter, the high-pressure slurry smoothly enters the fluid passage from the damping section 522 and finally enters the slurry outlet 300, the fluid turbulence caused by the steps is reduced, and the damping effect is further improved.

Example 4

With reference to fig. 8 to 10, this embodiment provides a flow stabilizing mechanism 530 applicable to the cavity 520 in the embodiment, where the flow stabilizing mechanism 530 includes a long spherical body 531, and a first fixed shaft 532 and a second fixed shaft 533 disposed at two ends of the long spherical body 531, the long spherical body 531 is located in the shock absorbing section 522, and a center line of the flow stabilizing mechanism 530 is coincident with a center line of the cavity 520; a grid 540 is arranged at the joint of the shock absorption section 522 and the outlet section 523, the grid 540 comprises a central disk 541 and support columns 542 which are arranged on the central disk 541 at equal intervals in the circumferential direction, and the support columns 542 are fixed on the inner side wall of the shock absorption section 522; one end of the flow stabilizing mechanism 530 is fixed on the inner end surface of the inlet section 521 of the cavity 520, and the other end is fixed on the central disc 541.

In the above technical scheme, the high-pressure slurry in the damping section 522 is stabilized by the flow stabilizing mechanism 530, and the high-pressure slurry flows into the damping section 522 along the smooth curved surface of the flow stabilizing mechanism 530, so that unstable high-pressure slurry forms stable laminar flow through the flow guide of the long spherical body 531, the flow rate of the high-pressure slurry in the damping section 522 reaches a stable state, and the vibration is further reduced.

The number of the supporting columns 542 of the grating 540 is preferably 2-4, and they are arranged at equal intervals along the circumference of the central disc 541, and the supporting columns 542 are preferably elongated with a circular or elliptical cross section, and they smoothly divide the high pressure slurry flowing through.

Preferably, as shown in fig. 10, the prolate spheroid body 531 includes a cylinder 5311, two ends of the cylinder 5311 are respectively provided with a second bulb portion 5312, one of the second bulb portions 5312 is connected to the first fixed shaft 532, the other is connected to the second fixed shaft 533, the circumference of the outer side wall of the cylinder 5311 is provided with an annular second groove 5313, a second elastic sleeve 5314 is arranged on the outer circumference of the cylinder 5311 in a sealing manner, the outer diameter of the second elastic sleeve 5314 is equal to the diameter of the second bulb portion 5312, and the second elastic sleeve 5314 and the second groove 5313 enclose a sealed second air cavity 5315.

In the above technical solution, the middle section of the long spherical body 531 adopts a form that the second elastic sleeve 5314 is matched with the second groove 5313, and the second groove 5313 preferably adopts an arc-shaped curved surface, and the function of the second groove 5313 is the same as the damping principle that the first elastic sleeve 5122 is matched with the first groove 5121 in the foregoing embodiment, which is not described again, so that the flow stabilizing mechanism 530 has the flow stabilizing and damping functions at the same time, and the damping effect of the flow stabilizing section 522 is further improved.

Example 5

With reference to fig. 3 to 6, the present embodiment provides a method for using a high-pressure mud manifold, which includes the following steps:

step S100, a single-pump operation mode specifically comprises the following steps:

step S110, in the drilling process, a single mud pump runs, the other mud pump is in a standby state, at the moment, the first electric valve 31, the second electric valve 32 and the third electric valve 33 are all closed, mud enters a vertical pipe through the second mud pump interface 42 and the second check valve 52 in sequence, and enters a drill rod bit through the vertical pipe to perform high-pressure mud circulation in the well;

step S120, when the mud pump enters winter, a first electric valve 31 and a flat gate valve 2 corresponding to another standby mud pump are started, and the standby mud pump is intermittently started to perform low-pressure circulation in a mud circulation tank, so that a low-pressure pipeline is prevented from being frozen;

step S200, a double-pump running mode,

in the drilling process, two mud pumps run simultaneously, the first electric valve 31, the second electric valve 32 and the third electric valve 33 are all closed, mud sequentially passes through the first mud pump interface 41 and the second mud pump interface 42 and respectively enters a vertical pipe through the first check valve 51 and the second check valve 52, and enters a drill bit of a drill rod through the vertical pipe to perform high-pressure mud circulation in the well;

step S300, a protection mode, which specifically comprises the following steps:

step S310, when pressure relief is needed in case of emergency, opening the third electric valve 33 for pressure relief;

and step S320, when one of the first electric valve 31, the second electric valve 32 and the third electric valve 33 in the electric valve group 3 leaks, closing the flat gate valve 2 and forcibly performing high-pressure mud circulation in the well.

The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents and are included in the scope of the present invention.

Claims (10)

1. The utility model provides a high pressure mud manifold, includes drill floor valve group (03), its characterized in that, mud pump (02) and riser (04) are connected respectively to drill floor valve group (03), mud pump (02) are connected mud circulation jar (01), drilling rod drill bit (05) are connected in riser (04), drill floor valve group (03) are including sled seat (1), be equipped with flat gate valve (2), electronic valves (3), mud pump interface group (4), check valve group (5) and connecting line on sled seat (1), flat gate valve (2) are located mud circulation jar (01) with between electronic valves (3), mud pump interface group (4) are located electronic valves (3) with between check valve group (5), check valve group (5) are connected riser (04).

2. The high pressure mud manifold of claim 1, comprising a single pump mode of operation enabling one mud pump (02) defining one mud line by the rig floor valve set (03), a dual pump mode of operation enabling two mud pumps (02) defining two mud lines by the rig floor valve set (03), and a protection mode of operation enabling a mud relief line by the rig floor valve set (03).

3. The high pressure mud manifold according to claim 2, characterized in that said electric valve group (3) comprises a first electric valve (31), a second electric valve (32) and a third electric valve (33), said mud pump interface group (4) comprises a first mud pump interface (41) and a second mud pump interface (42), said check valve group (5) comprises a first check valve (51) and a second check valve (52), said first mud pump interface (41) is arranged between said first electric valve (31) and said first check valve (51), said second mud pump interface (42) is arranged between said second electric valve (32) and said second check valve (52), and said third electric valve (33) is arranged in parallel between said first electric valve (31) and said second electric valve (32).

4. The high-pressure mud manifold as claimed in claim 3, wherein the first check valve (51) and the second check valve (52) are identical in structure and comprise a hollow shell (100), a mud inlet (200) and a mud outlet (300) are respectively arranged at two ends of the shell (100), a valve seat (400) and a valve core (500) which can move under pressure are sequentially arranged in the shell (100) along the mud flowing direction, a cylindrical cavity (520) is arranged in the valve core (500), the cavity (520) comprises an inlet section (521), a damping section (522) and an outlet section (523), and the inner diameters of the inlet section (521) and the damping section (522) are identical.

5. The high-pressure mud manifold as claimed in claim 4, wherein the valve core (500) comprises a valve core body (510), the valve core body (510) comprises a blocking portion (511) and a sliding portion (512) which are sequentially connected, the blocking portion (511) can abut against and block the valve seat (400), the sliding portion (512) can be in sealing sliding abutment with the inner side wall of the housing (100), and the side wall of the damping section (522) is circumferentially provided with a radially telescopic closed first air cavity (5123).

6. The high pressure mud manifold of claim 5, wherein a flow stabilizing mechanism (530) is disposed within the cavity (520), the flow stabilizing mechanism (530) comprising a long spherical body (531) disposed within the shock absorbing section (522) and a first fixed shaft (532) and a second fixed shaft (533) disposed at opposite ends of the long spherical body (531), a centerline of the flow stabilizing mechanism (530) coinciding with a centerline of the cavity (520).

7. The high-pressure mud manifold as claimed in claim 6, wherein the prolate spheroid body (531) comprises a cylinder (5311), two ends of the cylinder (5311) are respectively provided with a second bulb (5312), one of the second bulbs (5312) is connected with the first fixed shaft (532), the other one is connected with the second fixed shaft (533), and the side wall of the cylinder (5311) is circumferentially provided with a radially telescopic closed second air cavity (5315).

8. The high pressure mud manifold of claim 7, wherein said valve seat (400) has a spherical aperture (430); the blocking part (511) of the valve core body (510) comprises a semicircular first ball head part (5111) for blocking the spherical hole (430) and a neck part (5112) extending along the bottom surface of the first ball head part (5111), and a through hole (5113) communicated with the inlet section (521) in the cavity (520) is radially arranged on the neck part (5112).

9. The high-pressure mud manifold as set forth in claim 8, wherein an annular piston (513) is disposed on the sliding portion (512) near one end of the mud outlet (300), a limiting mechanism (700) having an inner diameter equal to that of the damper section (522) is disposed on the housing (100), and a sliding chamber (730) corresponding to the annular piston (513) is disposed on the limiting mechanism (700).

10. Use of a high pressure mud manifold according to any of claims 3 to 9, characterised by the steps of:

step S100, a single-pump operation mode specifically comprises the following steps:

step S110, in the drilling process, a single mud pump runs, the other mud pump is in a standby state, at the moment, the first electric valve (31), the second electric valve (32) and the third electric valve (33) are all closed, mud enters a vertical pipe through the second mud pump interface (42) and the second check valve (52) in sequence, and enters a drill bit of a drill rod through the vertical pipe to perform high-pressure mud circulation in the well;

step S120, when the mud pump enters winter, a first electric valve (31) and a flat gate valve (2) corresponding to another standby mud pump are started, and the standby mud pump is intermittently started to perform low-pressure circulation in a mud circulation tank, so that a low-pressure pipeline is prevented from being frozen;

step S200, a double-pump operation mode is adopted, in the drilling process, two mud pumps operate simultaneously, a first electric valve (31), a second electric valve (32) and a third electric valve (33) are all closed, mud sequentially passes through a first mud pump interface (41) and a second mud pump interface (42) and respectively enters a stand pipe through a first check valve (51) and a second check valve (52), and enters a drill rod drill bit through the stand pipe to perform high-pressure mud circulation in the well;

step S300, a protection mode, which specifically comprises the following steps:

step S310, when pressure relief is needed in case of emergency, opening a third electric valve (33) for pressure relief;

and step S320, when one of the first electric valve (31), the second electric valve (32) and the third electric valve (33) in the electric valve group (3) leaks, closing the flat gate valve (2) and forcibly circulating high-pressure mud in the well.

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