CN206130193U - Large -traffic changeable pressurized -water valve gear of two embolism formula high pressure of gun drilling - Google Patents

Abstract

The utility model provides a deep-drilled double-plug type high-pressure and large-flow switchable pressurized water valve device, which includes a valve body outside the cylinder and a valve body installed inside the valve body outside the cylinder. The valve body is equipped with a switchable shaft, a spring spool cylinder, a spring spool, a spool limit plate, and a spring baffle. The spring spool cylinder is provided with a spring spool, and the spring baffle is located The upper end of the spring spool barrel and the lower end of the switchable shaft are connected with the spring baffle. The spring spool passes through the spring baffle and the through hole at the lower part of the valve body in sequence from top to bottom. The spring, the spool limiting plate is located below the spring spool, and the valve body, the switchable shaft, the spool limiting plate and the spring baffle are all provided with water through holes. The device can not only provide the pressure in the double plugs in the water pressure test system, but also ensure that the water pressure test can meet the requirements of large flow, and can truly and efficiently measure the permeability of deep rock mass.

Description

Deep drilling double plug type high pressure and large flow switchable pressure water valve device

technical field

The utility model relates to the technical field of rock mechanics tests, in particular to a deep-drilling double-plug type high-pressure and large-flow switchable water pressure valve device.

Background technique

The main purpose of drilling conventional or high-pressure water pressure test is to determine the permeability of rock mass at different depths through in-situ measurement of boreholes, and provide reliable data for engineering design. Conventional pressure water tests generally use differential pressure rubber balls (tubes) as packers, connect the drill pipe to the bottom of the hole through the bottom of the equipment, and connect the drill pipe to the hole at the top, and then pressurize the drill pipe to make the rubber ball (tube) Vertical shrinkage and horizontal expansion are used to seal off the measuring section. This pressurized water test method is carried out once every 5.0m of drilling, and the position of the packer needs to be frequently changed and the packer and drill pipe re-lowered. This test method cannot carry out continuous measurement along the hole depth. For kilometer-level deep drilling, this problem is even more prominent. In addition, in the case of high-pressure water test, it is difficult for the differential pressure rubber ball (tube) isolation system to isolate the test section under high pressure, which makes the test results unreliable. Therefore, the utility model has developed a double plug pressurized water test system to carry out high pressure water test, including two test systems such as single loop mode and double loop mode. Among them, the single-circuit double-plug pressurized water test system cannot meet the requirements of large flow (the flow rate is generally less than 50L/min, and the pressure water regulation specification requires more than 100L/min); the double-circuit double-plug pressurized water test system can It meets the test requirements of high pressure and large flow rate, but it needs to add an additional high-pressure hose, which goes down to the bottom of the hole with the drill pipe, which makes the test operation more difficult for deep drilling, and the high-pressure hose wrapping around the drill pipe may easily cause drilling accidents , and the test period is longer.

Utility model content

The purpose of this utility model is to provide a deep drilling double plug type high pressure and large flow switchable pressurized water valve device, which can provide the pressure in the double plugs in the pressurized water test system, and the pressure can fully make the double plugs and the drill hole The hole wall contact achieves the purpose of sealing and isolating the pressurized water section, and can also ensure that the pressurized water test can meet the requirements of large flow, and can truly and efficiently measure the permeability of deep rock mass.

In order to solve the above technical problems, the utility model adopts the following technical solutions:

A deep-drilled double-plug type high-pressure and large-flow switchable pressurized water valve device, including a valve outer cylinder and a valve body installed inside the valve outer cylinder. The upper plug is connected to each other, the valve body is provided with a switchable shaft, a spring spool body, a spring spool, a spool limit plate, and a spring baffle, and the spring spool body is provided with a spring spool, The spring baffle is located at the upper end of the spring spool barrel, the lower end of the switchable shaft is connected to the spring baffle, and the spring spool passes through the spring baffle and the valve in sequence from top to bottom. The through hole at the lower part of the body, the spring spool is covered with a spring, the upper end of the spring is limited by the spring baffle, the spool limit plate is located below the spring spool, and is separated by a certain distance, The valve body, the switchable shaft, the valve core limit plate and the spring baffle are all provided with a water passage hole. In the initial state, the valve body is aligned with the water passage hole on the switchable shaft and connected to the double plug connected.

Further, the valve body and the spring spool body are provided with sealing rings, which are used to block the communication between the high pressure water and the pressure water test section in the initial state.

Further, the lower part of the valve outer cylinder is equipped with a fastening end.

The utility model breaks through the limitations of the traditional water pressure test. The device can provide the pressure in the double plugs in the water pressure test system (the pressure can fully make the double plugs contact with the borehole wall to reach the sealing isolation of the water pressure section. purpose), and can ensure that the pressure water test can meet the requirements of large flow, and can truly and efficiently measure the permeability of deep rock mass.

Description of drawings

Fig. 1 is a schematic diagram of the structure of the utility model deep drilling double plug type high pressure and large flow switchable pressure water valve device before switching;

Fig. 2 is a schematic diagram of the structure of the deep drilling double plug type high pressure and large flow switchable water pressure valve device of the present invention after switching;

Fig. 3 is a schematic diagram of the connection relationship of the deep-drilled double-plug type high-pressure and large-flow switchable water pressure valve device of the present invention.

In the figure: 1—drill pipe joint, 2—limit fastening nut, 3—pressure water valve, 4—plug sleeve, 5—upper plug, 6—connecting soft rubber hose, 7—outlet pipe of test section, 8— Lower plug, 9—valve body, 10—valve body, 11—sealing ring, 12—spring baffle, 13—spring spool cylinder, 14—spring, 15—spring spool, 16—spool limit plate , 17—end cover, 18—upper plug central rod, 19—switchable shaft, 20—water through hole.

detailed description

The technical solution in the utility model will be clearly and completely described below in conjunction with the accompanying drawings in the utility model.

Please refer to Figures 1-3. The utility model provides a deep-drilled double-plug type high-pressure and large-flow switchable water pressure valve device, which includes a valve body 9, a valve body 10, a switchable shaft 19, a spring spool 15, and a valve body. Position fastening nut 2, spool limit plate 16, spring 14, spring spool cylinder 13, sealing ring 11, spring baffle plate 12, end cover 17.

The lower part of the valve body 10 is connected to the upper plug 5 of the double plug in the pressurized water test system, and the valve body 9 is installed inside the valve body 10; the valve body 9 is provided with a switchable shaft 19, a spring spool 15, Spool limiting plate 16, spring 14, spring baffle 12, sealing ring 11, water passage hole 20, the lower end of the switchable shaft 19 is connected with spring baffle 12, and spring spool 15 passes through the spring baffle in turn from top to bottom The plate 12 and the lower part of the valve body 9 have through holes, the spring spool is covered with a spring 14, and the spool limiting plate 16 is located below the spring spool 15 with a certain distance.

The valve body 9 , the switchable shaft 19 , the valve core limiting plate 16 and the spring baffle 12 are all provided with a water passage hole 20 , and the lower part of the valve body cylinder 10 is provided with a fastening end 17 .

In the initial state, the water passage hole 20 on the valve body 9 communicates with the double plugs.

In the above technical solution, a sealing ring 11 is provided on the inner wall of the valve body 9, and the sealing ring 11 can meet the requirements of the high pressure water test, and it blocks the high pressure water from communicating with the pressure water test section in the initial state.

In the above-mentioned technical scheme, the spring spool cylinder 13 is also provided with a water passage hole 20 and a sealing ring 11, and the function of the valve body 9 and the sealing ring 11 on the spring spool cylinder 13 is the initial state. The lower barrier high pressure water communicates with the pressure water test section.

In the above technical solution, the limit fastening nut 2, the valve core limit plate 16, the switchable shaft 19, and the sealing ring 11 cooperate with each other to complete the switch of the pressure pipeline.

The utility model solves the double plug loading problem in the pressurized water test process by cooperating with the double plugs in the pressurized water test equipment; through the limit fastening nut 2, the valve core limit plate 16, the switchable shaft 19, the sealing Circle 11 and water passage hole 20 cooperate with each other to complete pressure pipeline switching and large flow problems, so that the permeability of deep rock mass can be truly and efficiently measured, and basic data can be provided for the design of tunnels or underground caverns.

Applying the deep drilling double plug type high pressure and large flow switchable pressure water valve device of the utility model to carry out the permeability test method of deep rock mass includes the following steps:

Step 1: Connect the lower part of the double-plug type high-pressure and large-flow switchable pressurized water valve device for deep drilling to the upper plug 5 of the double plugs in the pressurized water test system, and connect the upper part to the drill pipe joint 1; then lower it through the drill pipe To the predetermined water pressure test site, start the test pressurization system to pressurize, and the water pressure acts on the double plugs through the water through hole 20 on the valve body 9, so that the double plugs are tightly sealed and fixed on the wall of the borehole; At this time, the pressure pipeline communicates with the double plugs, and the sealing ring 11 on the valve body 9 and the spring valve core barrel 13 is in a blocking state to block the water from the pressure water test section, close the pressurization pipeline, and keep the pressure constant. Change;

Step 2: After the double plugs are tightly sealed and fixed on the wall of the drilled hole, the switchable shaft 19 is moved down to the spool limit plate 16 by lowering the drill pipe, and the spring spool 15 and the spring spool will The cylinder body 13 is separated, the spring 14 is compressed, and the switch of the pressure pipeline is realized. At this time, the pressure pipeline passes through the sealing ring 11 on the valve body 9 to stop water (the sealing ring 11 seals the water passage hole 20 on the valve body 9) and the double The plug is in a blocking state. Since the spring spool 15 is separated from the spring spool cylinder 13, the pressure pipeline passes through the water passage hole 20 on the spring baffle 12, the through hole at the bottom of the spring spool cylinder 13, and the spool limit plate. The water passing hole 20 on the 16 communicates with the water pressure test section (as shown in Figure 2), and this process can ensure that the pressure water enters the water pressure test section through the spring baffle plate 12 and the spool limit plate 16;

Step 3: Carry out a water pressure test according to the water pressure procedure;

Step 4: After the test of this section is completed, the pressure pipeline is switched by lifting the drill pipe, the spring 14 is stretched, the spring spool 15 moves up and is tightly combined with the sealing ring 11 on the spring spool cylinder 13, and the pressure The pipeline communicates with the double slugs, and the sealing ring 11 on the valve body 9 and the sealing ring 11 on the spring spool body 13 are in a blocking state to block the water and the pressure water test section, and the pressure in the double slugs is removed to make it compatible Atmospheric communication, at this time, the rubber cylinder of the double plug will shrink by itself and break away from the hole wall, and then move the test system to the test section of the next depth to continue the pressure water test.

The water flow rate of the utility model device can be calculated according to formula (1)

Q=v×S (1)

Among them: Q is the flow through the pressure water valve;

v is the flow rate of the fluid passing through the pressure water valve;

S is the cross-sectional area of the water passage hole on the spool limit plate and the spring baffle.

The utility model breaks through the limitations of the traditional water pressure test. The device can provide the pressure in the double plugs in the water pressure test system (the pressure can fully make the double plugs contact with the borehole wall to reach the sealing isolation of the water pressure section. purpose), and can ensure that the pressure water test can meet the requirements of large flow, and can truly and efficiently measure the permeability of deep rock mass.

The content not described in detail in this specification belongs to the prior art known to those skilled in the art.

The above is only a specific embodiment of the utility model, but the scope of protection of the utility model is not limited thereto, and any skilled person in the technical field can easily think of changes within the technical scope disclosed in the utility model Or replacement, all should be covered within the scope of protection of the present utility model. Therefore, the protection scope of the present utility model should be based on the protection scope of the claims.

Claims (3)

1. the changeable pressure water valve device of the double thromboembolism formula high-pressure high-flow of a kind of gun drilling, it is characterised in that：Including valve body outer tube (10) valve body (9) and inside the loading valve body outer tube (10), in valve body outer tube (10) bottom and packer permeability test system Upper thromboembolism (5) in double thromboembolisms is connected, and the valve body (9) is provided with changeable axle (19), spring valve element cylinder (13), spring Spring valve element (15) is provided with valve element (15), valve element limiting plate (16), spring stop (12), the spring valve element cylinder (13), The spring stop (12) is positioned at spring valve element cylinder (13) upper end, changeable axle (19) lower end and the spring catch Plate (12) connects, and the spring valve element (15) sequentially passes through from top to bottom the spring stop (12) and the valve body (9) bottom Through hole, is arranged with spring (14) on the spring valve element (15), the upper end of the spring (14) is limited by the spring stop (12) Position, the valve element limiting plate (16) and keeps at a certain distance away positioned at the spring valve element (15) lower section, the valve body (9), can cut Change axle (19), valve element limiting plate (16) and be equipped with water through hole (20), during original state, the valve body with spring stop (12) (9) with crossing (20) para-position of water through hole and connecting with double thromboembolisms on changeable axle (19).

2. the changeable pressure water valve device of the double thromboembolism formula high-pressure high-flow of gun drilling as claimed in claim 1, it is characterised in that：Institute State valve body (9) and the spring valve element cylinder (13) is provided with sealing ring (11), for water under high pressure to be intercepted under original state with pressure Water test section is communicated.

3. the changeable pressure water valve device of the double thromboembolism formula high-pressure high-flow of gun drilling as claimed in claim 1, it is characterised in that：Institute Valve body outer tube (10) bottom is stated equipped with fastening termination (17).