CN218916895U - Sampler for exploiting natural gas hydrate - Google Patents

Abstract

The utility model discloses a sampler for exploiting natural gas hydrate, which relates to the technical field of samplers and comprises a storage column with a tubular structure, wherein a sampling device is fixedly connected between the inner walls of the storage column, the sampling device comprises a sampling barrel with a hollow inside, and a sealing device for sealing a feeding cavity is slidably arranged in the sampling barrel. According to the sampler for exploiting the natural gas hydrate, when the sampler is used for perforating, high-pressure air is stored in the high-pressure cavity, so that the first lifting plate moves downwards, the second lifting plate is driven by the telescopic rod to move downwards, the feeding cavity communicated with the sampling barrel is sealed, when the sampler is drilled into the range of combustible ice, the high-pressure cavity is decompressed, then the sampler is drilled again, the combustible ice drives the second lifting plate to move upwards under the action of pressure, the storage cavity is opened, the combustible ice enters the storage cavity, sampling is achieved, and after the sampling is finished, high-pressure gas is injected into the high-pressure cavity again, so that the feeding cavity is sealed again.

Description

Sampler for exploiting natural gas hydrate

Technical Field

The utility model relates to the technical field of samplers, in particular to a sampler for exploiting natural gas hydrate.

Background

The natural gas hydrate is i.e. ice, is an ice-like crystalline substance formed by natural gas and water under the conditions of high pressure and low temperature, is combusted when meeting fire because of the appearance like ice, and is called as combustible ice, solid gas and gas ice, and the natural gas hydrate is distributed in deep sea or land area permafrost, generates only a small amount of carbon dioxide and water after combustion, has pollution far less than coal, petroleum and the like, and has huge reserves, so the natural gas hydrate is internationally recognized as a substitute energy source of petroleum and the like;

when the combustible ice is required to be formed under specific conditions and mined or sampled, the combustible ice is gradually broken down under high-pressure and low-temperature conditions, the combustible ice can be changed into natural gas and water again, and the natural gas which is changed into gas again easily overflows in the sampler, so that the sampling is difficult, and therefore, the applicant provides a novel sampler for mining the natural gas hydrate.

Disclosure of Invention

The utility model aims to provide a sampler for exploiting natural gas hydrate, which aims to solve the defects that combustible ice is required to be formed under specific conditions in the prior art, natural gas and water are changed again along with gradual collapse of high-pressure low-temperature conditions when exploitation or sampling is carried out, and the natural gas changed into gas again is easy to overflow in the sampler, so that sampling is difficult.

In order to achieve the above object, the present utility model provides the following technical solutions:

the utility model provides a sampler for natural gas hydrate exploitation, includes tubular construction's storage post, the bottom of storage post is provided with drilling equipment, a plurality of feed inlets have been seted up on drilling equipment's surface, separate into two feed chambers through a horizontal pole between the inner wall of storage post bottom, fixedly connected with sampling device between the inner wall of storage post, sampling device includes an inside hollow sampling bucket, the bottom of sampling bucket is linked together with one of them feed chamber, the slip is provided with carries out confined sealing device to the feed chamber in the sampling bucket.

Further, the circumference side fixedly connected with T shape ring piece on drilling equipment top, the T shape annular groove with T shape ring piece assorted is seted up to the bottom of storing the post, the last surface fixedly connected with of horizontal pole drives drilling equipment and carries out rotatory drive arrangement.

Further, the driving device comprises a first motor, an output shaft of the first motor penetrates through the cross rod and is fixedly connected with the drilling device, and a motor sheath for sealing the first motor is sleeved on the periphery of the first motor.

Further, the inside of sampling bucket is separated into two independent cavities through a first lifter plate that transversely sets up, with fixedly connected with extension board between the inner wall of the feeding chamber of sampling bucket intercommunication.

Further, the top fixed mounting of sample bucket has the air pipe joint that is used for carrying out the pressurization to the independent cavity that is located the top, the inner wall sealing arrangement of first lifter plate and sample bucket.

Further, the second lifting plate is arranged in the independent cavity below in a sliding manner, the periphery of the second lifting plate is bonded with the inner wall of the extension plate and is in sealing arrangement, and the telescopic rod is arranged between the first lifting plate and the second lifting plate.

According to the sampler for exploiting the natural gas hydrate, the sampling barrel is arranged in the storage column, the sampling barrel is divided into the upper independent cavity and the lower independent cavity through the first lifting plate, the upper independent cavity is the high-pressure cavity, the lower independent cavity is the storage cavity, the second lifting plate is arranged in the storage cavity, the second lifting plate seals the feeding cavity communicated with the sampling barrel, when the sampler is used, the drilling device firstly performs punching, high-pressure air is stored in the high-pressure cavity during punching, so that the first lifting plate moves downwards, the second lifting plate moves downwards through the telescopic rod, the feeding cavity communicated with the sampling barrel is sealed, when the sampler drills into a combustible ice range, the high-pressure cavity is decompressed, then the combustible ice drives the second lifting plate to move upwards under the pressure effect, so that the storage cavity is opened, the combustible ice enters the storage cavity, sampling is realized, and after the sampling is finished, high-pressure air is injected into the high-pressure cavity again, so that the feeding cavity is sealed again;

the bottom of storing the post is separated into two feed chambers through the horizontal pole, during the use, one of them feed chamber gets into earth, and another feed chamber gets into flammable ice to earth needs to be discharged in drilling equipment week side when avoiding drilling, when unable timely discharge, can extrude peripheral soil, if peripheral soil produces the crack, has the risk that leads to flammable ice to reveal.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present utility model, and other drawings may be obtained according to these drawings for a person having ordinary skill in the art.

Fig. 1 is a schematic overall structure of a sampler for exploiting natural gas hydrate according to an embodiment of the present utility model;

FIG. 2 is an exploded schematic view of a storage column and drilling device of a sampler for exploiting natural gas hydrate according to an embodiment of the present utility model;

FIG. 3 is a schematic diagram of the internal structure of a storage column of a sampler for exploiting natural gas hydrate according to an embodiment of the present utility model;

fig. 4 is a schematic diagram of an internal structure of a sampling barrel of a sampler for exploiting natural gas hydrate according to an embodiment of the present utility model;

fig. 5 is a schematic cross-sectional view of a column connection structure of a sampler for exploiting natural gas hydrate according to an embodiment of the present utility model.

Reference numerals illustrate:

1. a drilling device; 11. t-shaped ring blocks; 2. a storage column; 21. t-shaped ring grooves; 22. an extension plate; 3. a cross bar; 4. a sampling device; 41. a first lifting plate; 42. a second lifting plate; 43. a telescopic rod; 44. an air pipe joint; 5. and a motor sheath.

Detailed Description

In order to make the technical scheme of the present utility model better understood by those skilled in the art, the present utility model will be further described in detail with reference to the accompanying drawings.

Referring to fig. 1-5, the sampler for exploiting natural gas hydrate provided by the utility model comprises a storage column 2 with a tubular structure, wherein a drilling device 1 is arranged at the bottom end of the storage column 2, a plurality of feeding holes are formed in the surface of the drilling device 1, two feeding cavities are separated between the inner walls of the bottom end of the storage column 2 through a cross rod 3, a sampling device 4 is fixedly connected between the inner walls of the storage column 2, the sampling device 4 comprises a sampling barrel with a hollow inside, the bottom end of the sampling barrel is communicated with one of the feeding cavities, and a sealing device for sealing the feeding cavities is slidably arranged in the sampling barrel.

Specifically, drilling equipment 1 is shield constructs quick-witted drill bit, this is prior art for the earth that drills out can get into in storing post 2, avoids soil to discharge at drill bit week side, thereby has avoided the earth oppression peripheral soil of drilling out, causes the crack, and then has avoided the combustible ice to reveal the risk, and in the earth got into storing post 2 through the feed inlet, sampling device 4 all sealed the sample bucket before the sample with the sample back, has avoided the combustible ice to reveal.

The circumference side fixedly connected with T shape ring piece 11 on drilling equipment 1 top, the T shape annular groove 21 with T shape ring piece 11 assorted is seted up to the bottom of storing post 2, and the upper surface fixedly connected with of horizontal pole 3 drives drilling equipment 1 and carries out rotatory drive arrangement.

Further, due to the cooperation of the T-shaped ring block 11 and the T-shaped ring groove 21, the drilling device 1 and the storage column 2 are connected together and can rotate, and the driving device drives the drilling device 1 to rotate, so that drilling is realized.

The driving device comprises a first motor, an output shaft of the first motor penetrates through the cross rod 3 and is fixedly connected with the drilling device 1, and a motor sheath 5 for sealing the first motor is sleeved on the periphery of the first motor.

Specifically, the motor sheath 5 seals the first motor, and prevents soil and natural gas from entering the first motor.

The inside of the sampling barrel is divided into two independent cavities by a first lifting plate 41 which is transversely arranged, and an extension plate 22 is fixedly connected between the inner walls of the feeding cavity communicated with the sampling barrel.

Specifically, the upper independent cavity is a high-pressure cavity, and the lower independent cavity is a storage cavity.

The top of the sampling barrel is fixedly provided with an air pipe joint 44 for pressurizing the independent cavity above, and the first lifting plate 41 is arranged in a sealing manner with the inner wall of the sampling barrel.

Specifically, the air connection 44 connects to a high pressure air line to apply or release pressure within the high pressure cavity.

The second lifting plate 42 is slidably arranged in the independent cavity below, the periphery of the second lifting plate 42 is attached to the inner wall of the extension plate 22 and is in sealing arrangement, and the telescopic rod 43 is arranged between the first lifting plate 41 and the second lifting plate 42.

Specifically, the extension plate 22 is disposed such that the second lifting plate 42 is smaller than the first lifting plate 41, and when the second lifting plate 42 moves away from the extension plate 22 and enters the sampling barrel, a larger gap is formed between the second lifting plate 42 and the inner wall of the sampling barrel, so that the combustible ice enters the storage cavity.

While certain exemplary embodiments of the present utility model have been described above by way of illustration only, it will be apparent to those of ordinary skill in the art that modifications may be made to the described embodiments in various different ways without departing from the spirit and scope of the utility model. Accordingly, the drawings and description are to be regarded as illustrative in nature and not as restrictive of the scope of the utility model, which is defined by the appended claims.

Claims (6)

1. The sampler for exploiting the natural gas hydrate is characterized by comprising a storage column (2) with a tubular structure, wherein a drilling device (1) is arranged at the bottom end of the storage column (2), and a plurality of feeding holes are formed in the surface of the drilling device (1);

the inner walls at the bottom ends of the storage columns (2) are separated into two feeding cavities by a cross rod (3);

a sampling device (4) is fixedly connected between the inner walls of the storage columns (2), and the sampling device (4) comprises a sampling barrel with a hollow inside;

the bottom end of the sampling barrel is communicated with one of the feeding cavities;

and a sealing device for sealing the feeding cavity is arranged in the sampling barrel in a sliding manner.

2. The sampler for natural gas hydrate exploitation according to claim 1, wherein the circumference of the top end of the drilling device (1) is fixedly connected with a T-shaped ring block (11), the bottom end of the storage column (2) is provided with a T-shaped ring groove (21) matched with the T-shaped ring block (11), and the upper surface of the cross rod (3) is fixedly connected with a driving device for driving the drilling device (1) to rotate.

3. The sampler for natural gas hydrate exploitation according to claim 2, characterized in that the driving device comprises a first motor, the output shaft of which penetrates the cross bar (3) and is fixedly connected with the drilling device (1), and the peripheral side of the first motor is sheathed with a motor sheath (5) for sealing the first motor.

4. The sampler for natural gas hydrate exploitation according to claim 1, wherein the interior of the sampling barrel is divided into two independent cavities by a first lifting plate (41) arranged transversely, and an extension plate (22) is fixedly connected between the inner walls of the feeding cavity communicated with the sampling barrel.

5. The sampler for natural gas hydrate exploitation according to claim 4, wherein the top of the sampling barrel is fixedly provided with an air pipe joint (44) for pressurizing the independent cavity above, and the first lifting plate (41) is arranged in a sealing way with the inner wall of the sampling barrel.

6. The sampler for extracting natural gas hydrate according to claim 4, wherein a second lifting plate (42) is slidably arranged in the independent cavity below, the periphery of the second lifting plate (42) is attached to the inner wall of the extension plate (22) and is in sealing arrangement, and a telescopic rod (43) is arranged between the first lifting plate (41) and the second lifting plate (42).

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