Drilling blowout preventer for gas control

Abstract

The utility model relates to the technical field of gas control, in particular to a drilling blowout preventer for gas control, which comprises a single two-cavity pneumatic delay gas-water-slag separating device, one end of the outer surface of the single two-cavity pneumatic delay gas-water-slag separating device is fixedly connected with a fixing pipe, and one end of the fixing pipe is fixedly connected with a fixing flange. According to the drilling blowout preventer for gas control, due to the arrangement of the single two-cavity pneumatic time-delay gas-water-slag separation device, the fixing pipe, the connecting pipe, the positioning pipe and the air bag, when the drilling blowout preventer is used, the single two-cavity pneumatic time-delay gas-water-slag separation device can conduct two-stage separation on gas, water and slag, a two-cavity locking gas sealing chamber structure is adopted, and the gas-water-slag separation device can conduct two-stage separation on the gas, the water and the slag; a pneumatic delay valve element is used for acting according to a certain time period to alternately open and close water slag discharge port valves of the two cavities, gas, water and slag are automatically separated in the closed cavities, space body exchange in the extraction state is achieved, gas overflow is effectively eradicated, and gas alarm over-limit of the environment nearby drilling is prevented.

Description

TECHNICAL FIELD

[0001] The utility model relates to a gas management drilling blowout preventer. BACKGROUND

[0002] Coal mine gas extraction refers to the process of extracting gas (main component is methane) from coal mine through specific technical means and utilizing or processing it. Gas is a kind of harmful gas produced in the process of coal mining, mainly composed of coal bed gas, with the characteristics of colorless, odorless and non-toxic, but with high flammability and potential explosiveness, which is an important hidden danger of coal mine safety. Drilling blowout preventer is needed in gas management.

[0003] However, the existing drilling blowout preventer for gas management has the following shortcomings:

[0004] (1) The existing drilling blowout preventer for gas management has weak protection function. When in use, the existing device cannot effectively treat the leaked gas, which may cause safety problems.

[0005] (2) The existing drilling blowout preventer for gas management has weak buffering function. When in use, the existing device cannot withstand the high pressure gas during gas leakage, which may cause the device to separate. INVENTION CONTENTS

[0006] The utility model aims at providing a drilling blowout preventer for gas management to solve the problems raised in the background.

[0007] To achieve the above purpose, the utility model provides the following technical scheme: a drilling blowout preventer for gas management, comprising a single two-cavity pneumatic delay gas-water-slag separation device, the outer surface of the single two-cavity pneumatic delay gas-water-slag separation device is fixedly connected with a fixed pipe at one end, the fixed pipe is fixedly connected with a fixed flange at one end, the inner wall of the fixed flange is clamped with a mounting bolt, the mounting bolt is threadedly connected with a nut at one end, the other end of the mounting bolt is provided with a spring, one end of the spring is provided with a connecting flange, the connecting flange is fixedly connected with a connecting pipe at one end, the other end of the connecting flange is fixedly connected with a positioning pipe, the positioning pipe is fixedly connected with an air bag at one end.

[0008] Preferably, the inner wall of the fixed pipe is provided with an arc-shaped groove, the inner wall of the arc-shaped groove is fixedly connected with a sealing ring, and the sealing ring is installed on the inner wall of the fixed pipe.

[0009] Preferably, the inner wall of the sealing ring is provided with a circular slot, and the inner wall of the circular slot is clamped at one end of the connecting pipe.

[0010] Preferably, one end of the fixed flange is provided with a through groove, and the inner wall of the through groove is arranged at one end of the connecting flange.

[0011] Preferably, the bottom edge of the single two-cavity pneumatic delay gas-water-slag separation device is fixedly connected with a supporting column, and the outer surface of the supporting column is fixedly connected with a connecting rod.

[0012] Preferably, one end of the connecting flange is provided with a connecting groove, and the inner wall of the connecting groove is arranged at one end of the outer surface of the mounting bolt.

[0013] Compared with the prior art, the utility model has the beneficial effects that:

[0014] 1. The gas treatment drilling blowout prevention device is provided with a single two-cavity pneumatic delay gas-water-slag separation device, a fixed pipe, a connecting pipe, a positioning pipe and an air bag, so that the single two-cavity pneumatic delay gas-water-slag separation device can separate gas, water and slag in two stages, the two-cavity closed gas sealing chamber structure is adopted, the pneumatic delay valve element is used to work for a certain period of time to alternately open and close the water-slag discharge outlet valve of the two cavities, the gas, water and slag are automatically separated in the closed cavity, the space exchange is realized in the state of extraction, the gas overflow is effectively prevented, the gas alarm overrun in the environment near drilling is prevented, when the blowout hole phenomenon occurs during drilling, the high-pressure gas in the single two-cavity pneumatic delay gas-water-slag separation device is suddenly pressed into the large-volume flexible extraction air bag to buffer and release the pressure, and the whole device is protected from being damaged by the high pressure of the blowout hole.

[0015] 2. The gas treatment drilling blowout prevention device is provided with a fixed pipe, a fixed flange, a mounting bolt, a nut, a spring, a connecting flange, a connecting pipe and a positioning pipe, so that the fixed flange on the fixed pipe is connected with the connecting flange at one end of the positioning pipe, the connecting pipe at one end of the connecting flange is inserted into the sealing ring in the fixed pipe, the mounting bolt is inserted into the corresponding groove hole of the fixed flange and the connecting flange, the spring at one end of the outer surface of the mounting bolt abuts against the back surface of the connecting flange, the nut is screwed onto the mounting bolt to install the fixed flange and the connecting flange, when the high-pressure gas impacts the air bag, the spring is compressed under force, the fixed flange and the connecting flange are temporarily separated and then reset, and the connecting pipe is temporarily displaced in the sealing ring on the inner wall of the fixed pipe, so that the sealing property of the device is ensured, and the high-pressure gas is separated from the pipe. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a schematic view of the single two-cavity pneumatic delay gas-water-slag separation device of the utility model;

[0017] Figure 2 The fixed pipe schematic view of the utility model is shown in the figure;

[0018] Figure 3 The air bag schematic view of the utility model is shown in the figure;

[0019] Figure 4 The mounting bolt schematic view of the utility model is shown in the figure.

[0020] In the figure: 1, single two-cavity pneumatic delay gas-water slag separation device; 2, fixed pipe; 3, fixed flange; 4, mounting bolt; 5, nut; 6, spring; 7, connecting flange; 8, connecting pipe; 9, positioning pipe; 10, air bag; 11, sealing ring; 12, support column; 13, connecting rod. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0022] Please refer to Figures 1-4The utility model provides a kind of technical scheme shown in the utility model: a kind of drilling blowout preventer for gas control, including single two-cavity pneumatic delay gas-water-slag separation device 1, the outer surface one end of single two-cavity pneumatic delay gas-water-slag separation device 1 is fixedly connected with fixed pipe 2, one end of fixed pipe 2 is fixedly connected with fixed flange 3, the inner wall of fixed flange 3 is clamped with mounting bolt 4, one end of mounting bolt 4 is threadedly connected with nut 5, the other end of mounting bolt 4 is provided with spring 6, one end of spring 6 is provided with connecting flange 7, one end of connecting flange 7 is fixedly connected with connecting pipe 8, the other end of connecting flange 7 is fixedly connected with positioning pipe 9, one end of positioning pipe 9 is fixedly connected with air bag 10, by the setting of single two-cavity pneumatic delay gas-water-slag separation device 1, fixed pipe 2, connecting pipe 8, positioning pipe 9 and air bag 10, when using, single two-cavity pneumatic delay gas-water-slag separation device 1 will be gas, water, slag secondary separation, by adopting two-cavity closed gas sealing chamber structure, using pneumatic delay valve element works for a certain time period to open and close alternately the water slag discharge port valve of two cavities, automatically separate gas water slag in closed cavity, realize space body exchange under extraction state, effectively prevent gas overflow, prevent drilling near environment gas alarm overrun, when encountering blowout phenomenon during drilling, high-pressure gas in single two-cavity pneumatic delay gas-water-slag separation device 1 will surge into bypassing large-volume flexible extraction air bag 10 and release pressure, protect the whole set of device from blowout high-pressure impact damage, by the setting of fixed pipe 2, fixed flange 3, mounting bolt 4, nut 5, spring 6, connecting flange 7, connecting pipe 8 and positioning pipe 9, when using, staff connects fixed flange 3 on fixed pipe 2 with connecting flange 7 at one end of positioning pipe 9, connecting pipe 8 at one end of connecting flange 7 is inserted into sealing ring 11 in fixed pipe 2, mounting bolt 4 is inserted into the corresponding slot hole of fixed flange 3 and connecting flange 7, spring 6 at one end of the outer surface of mounting bolt 4 is resisted on the back of connecting flange 7, nut 5 is screwed on mounting bolt 4 to install fixed flange 3 and connecting flange 7, when high-pressure gas impacts air bag 10, spring 6 will be compressed under stress, so that fixed flange 3 and connecting flange 7 are temporarily separated and reset, connecting pipe 8 will be temporarily displaced in sealing ring 11 on the inner wall of fixed pipe 2, which can guarantee the sealing property of the device while relieving the impact of high-pressure gas on the pipe, it needs to be pointed out that: the size of air bag 10: length 10m* diameter 1m, volume is 7.85m 3, it can also be increased or decreased according to actual situation, collect and accommodate gas, the gas buffered in flexible extraction air bag 10 will be extracted into gas extraction pipe through tail-attached extraction steel wire rubber hose, finally reach extraction pump station, ensure that gas is closed-loop controlled in blowout prevention system during the whole drilling construction process, not gushing into downhole operation environment, the model of single two-cavity pneumatic delay gas-water-slag separation device is: WQS-1.

[0023] The inner wall of the fixed pipe 2 is provided with an arc-shaped groove, and the inner wall of the arc-shaped groove is fixedly connected with a sealing ring 11. Through the arrangement of the fixed pipe 2 and the sealing ring 11, the sealing ring 11 is installed on the inner wall of the fixed pipe 2 and is mounted with the connecting pipe 8, so that the sealing performance of the pipeline is improved.

[0024] The inner wall of the sealing ring 11 is provided with a circular groove, and the inner wall of the circular groove is clamped to one end of the connecting pipe 8. Through the arrangement of the sealing ring 11 and the connecting pipe 8, the connecting pipe 8 is inserted into the sealing ring 11 in use.

[0025] One end of the fixed flange 3 is provided with a through groove, and the inner wall of the through groove is arranged at one end of the connecting flange 7. Through the arrangement of the fixed flange 3 and the connecting flange 7, the fixed flange 3 and the connecting flange 7 are butt-jointed and mounted in use.

[0026] The bottom edge of the single two-cavity pneumatic delay gas-water-slag separation device 1 is fixedly connected with a supporting column 12, and the outer surface of the supporting column 12 is fixedly connected with a connecting rod 13. Through the arrangement of the single two-cavity pneumatic delay gas-water-slag separation device 1, the supporting column 12 and the connecting rod 13, the supporting column 12 and the connecting rod 13 provide stability for the single two-cavity pneumatic delay gas-water-slag separation device 1 in use.

[0027] One end of the connecting flange 7 is provided with a connecting groove, and the inner wall of the connecting groove is arranged at one end of the outer surface of the mounting bolt 4. Through the arrangement of the connecting flange 7 and the mounting bolt 4, the mounting bolt 4 needs to pass through the connecting groove on the connecting flange 7 in use.

[0028] In the utility model, the working steps of the device are as follows:

[0029] The first step is that the staff connects the fixed flange 3 on the fixed pipe 2 with the connecting flange 7 at one end of the positioning pipe 9, inserts the connecting pipe 8 at one end of the connecting flange 7 into the sealing ring 11 in the fixed pipe 2, inserts the mounting bolt 4 into the corresponding groove holes of the fixed flange 3 and the connecting flange 7, abuts the spring 6 at one end of the outer surface of the mounting bolt 4 against the back of the connecting flange 7, and screws the nut 5 onto the mounting bolt 4 to mount the fixed flange 3 and the connecting flange 7;

[0030] The second step is that the single two-cavity pneumatic delay gas-water-slag separation device 1 separates gas, water and slag in two stages. Through the adoption of a two-cavity closed gas sealing chamber structure and the use of a pneumatic delay valve element to work for a certain period of time, the water-slag discharge port valves of the two cavities are alternately opened and closed, gas, water and slag are automatically separated in the closed cavity, space exchange is realized in the state of extraction, gas overflow is effectively prevented, and gas alarm overrun near the drilling environment is prevented. When the jetting hole phenomenon occurs during drilling, the high-pressure gas in the single two-cavity pneumatic delay gas-water-slag separation device 1 is suddenly pressed into the bypass large-volume flexible extraction air bag 10 to buffer and release the pressure, and the whole device is protected from being damaged by the high pressure of the jetting hole.

[0031] Third step: when the high pressure gas impact toward the air bag 10, spring 6 will be forced to compress, let fixed flange 3 and connecting flange 7 after a brief separation reset, connecting pipe 8 will be in the fixed pipe 2 on the inner wall of the sealing ring 11 in a brief displacement, can guarantee the sealing of the device while relieving the high pressure gas will impact the pipeline separation.

[0032] It should be noted that the device structure and the drawings of the utility model mainly describe the principle of the utility model, and the setting of the power mechanism, the power supply system and the control system of the device is not completely described in the technical principle of the design, and under the premise that the above-mentioned utility model is understood by the technical personnel in the field, the specific of the power mechanism, the power supply system and the control system can be clearly known, and the control mode of the application file is automatically controlled by the controller, and the control circuit of the controller can be realized by simple programming of the technical personnel in the field;

[0033] The standard parts used therein can be purchased from the market, and can be ordered according to the description and the drawings, the specific connection mode of each part adopts the conventional screw, rivet, welding and other conventional means in the prior art, the mechanical parts and equipment adopt the conventional type in the prior art, and the components known by the technical personnel in the field, the structure and principle thereof are known by the technical personnel in the field through the technical manual or through the conventional experimental method.

[0034] Although the embodiments of the utility model have been shown and described, it can be understood by those of ordinary skill in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A gas control drilling blowout preventer comprising a single two-chamber pneumatic delay gas-water-slag separation device (1), characterized in that: The outer surface of the single two-cavity pneumatic delay gas-water and cinder separation device (1) is fixedly connected with a fixed pipe (2), one end of the fixed pipe (2) is fixedly connected with a fixed flange (3), the inner wall of the fixed flange (3) is clamped with a mounting bolt (4), one end of the mounting bolt (4) is threadedly connected with a nut (5), the other end of the mounting bolt (4) is provided with a spring (6), one end of the spring (6) is provided with a connecting flange (7), one end of the connecting flange (7) is fixedly connected with a connecting pipe (8), the other end of the connecting flange (7) is fixedly connected with a positioning pipe (9), one end of the positioning pipe (9) is fixedly connected with an air bag (10).

2. A gas control drilling blowout preventer according to claim 1, characterized in that: The inner wall of the fixed pipe (2) is provided with an arc-shaped groove, and the inner wall of the arc-shaped groove is fixedly connected with a sealing ring (11).

3. A gas control drilling blowout preventer according to claim 2, characterized in that: The inner wall of the sealing ring (11) is provided with a circular slot hole, and one end of the connecting pipe (8) is clamped to the inner wall of the circular slot hole.

4. A gas control drilling blowout preventer according to claim 1, characterized in that: One end of the fixed flange (3) is provided with a through groove, and the inner wall of the through groove is arranged at one end of the connecting flange (7).

5. A gas control drilling blowout preventer according to claim 1, characterized in that: The bottom edge of the single two-cavity pneumatic delay gas-water and cinder separation device (1) is fixedly connected with a supporting column (12), and the outer surface of the supporting column (12) is fixedly connected with a connecting rod (13).

6. A gas control drilling blowout preventer according to claim 1, characterized in that: One end of the connecting flange (7) is provided with a connecting groove, and the inner wall of the connecting groove is arranged at one end of the mounting bolt (4).

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