CN212483063U

CN212483063U - Device for exploring and sampling seabed shallow gas

Info

Publication number: CN212483063U
Application number: CN202021428099.2U
Authority: CN
Inventors: 谢永清; 杨娇娇; 陈俊兵; 杨磊; 李昂
Original assignee: Zhejiang Institute Of Hydrogeology And Engineering Geology
Current assignee: Zhejiang Institute Of Hydrogeology And Engineering Geology
Priority date: 2020-07-20
Filing date: 2020-07-20
Publication date: 2021-02-05
Anticipated expiration: 2030-07-20

Abstract

The utility model discloses a device that is used for seabed shallow layer gas to explore and sample, including the sleeve pipe, sheathed tube bottom threaded connection has the sample screen pipe, and the bleeder vent has been seted up on the one end fixedly connected with conical head of sample screen pipe, the surface of sample screen pipe, and the one end fixedly connected with spacing ring of sample screen pipe, the middle part fixedly connected with of sleeve pipe upper surface are to the pipe, and the one end threaded connection to the pipe has the extension drilling rod. This a device for seabed shallow layer gas is probed and is sampled, through the sleeve pipe, the sample screen pipe, the conical head, the bleeder vent, the spacing ring, stop device, the extension drilling rod, the fixed pipe, the valve, manometer and the setting of sampling tube, extend the sleeve pipe to sample target layer through the extension drilling rod, this in-process sample screen pipe is in airtight state, thereby rotate the extension drilling rod and drive the sleeve pipe and rotate and then make sleeve pipe and sample screen pipe reverse thread separation upwards carry the sleeve pipe and take out the sample screen pipe, thereby gas gets into in the sample screen pipe through the bleeder vent.

Description

Device for exploring and sampling seabed shallow gas

Technical Field

The utility model relates to a sample technical field specifically is a device that is used for seabed shallow layer gas to explore and take a sample.

Background

Shallow subsea gas generally refers to gas that accumulates in sediments within 1000m below the seafloor, with methane as the major constituent. The southeast China widely develops quaternary sediments in coastal plains, estuaries, gulfs and offshore areas, is rich in organic matters, has wide shallow biogas distribution and burial depth generally not more than 100 m. The soil containing shallow gas is a special unsaturated soil, the existence or overflow of the shallow gas can seriously affect the properties and engineering properties of the soil body, and the engineering hazards which can be caused are various, and the common hazards are as follows: blowout, various pile foundation accidents, landslide, suspended fracture of a submarine pipeline, uneven settlement and the like. Therefore, the development of seabed shallow gas exploration and sampling equipment is an important content in geological investigation. At present, the exploration of shallow gas at the sea bottom adopts a geophysical prospecting technology to carry out qualitative identification, and if further component and quantitative identification are required, only indirect measurement of soil sampling by offshore drilling or direct gas sampling observation by static sounding can be adopted. And the offshore drilling soil sampling has the defects of complicated internal gas testing construction, high cost and difficulty in fidelity sampling. The conventional static sounding exploration and gas sampling device is formed by connecting a conical head, a ventilating sieve tube, a probe rod, a ground pressure gauge, a valve and a gas sampling port. During exploration and sampling, the gas-permeable sieve tube is pressed into a gas-containing stratum, the stratum gas enters the exploration rod along the gas-permeable sieve tube, pressure is measured on the ground, and sampling is carried out at the gas taking port. However, the pressure gauge and the valve can be connected only after the pressing-in action of the equipment is stopped, and gas easily overflows along the sieve tube in advance in the pressing-down process of the gas-permeable sieve tube, so that the measured pressure is small and the sampling is difficult after the gas-permeable sieve tube is pressed into a specified target layer; when the gas content and pressure in the formation are low, even no pressure can be detected and sampling fails.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

Not enough to prior art, the utility model provides a device that is used for seabed shallow layer gas to explore and take a sample has solved the problem that provides among the above-mentioned background art.

(II) technical scheme

In order to achieve the above purpose, the utility model discloses a following technical scheme realizes: the utility model provides a device for seabed shallow layer gas is probed and is taken a sample, includes the sleeve pipe, sheathed tube bottom threaded connection has the sample screen pipe, the one end fixedly connected with conical head of sample screen pipe, the bleeder vent has been seted up on the surface of sample screen pipe, the one end fixedly connected with spacing ring of sample screen pipe, the middle part fixedly connected with of sleeve pipe upper surface is to the pipe, the one end threaded connection who is to the pipe has the extension drilling rod, the one end intercommunication of extension drilling rod has fixed pipe, fixed pipe surface has set gradually valve A, manometer and valve B from a left side right side, the middle part fixedly connected with sampling tube at the fixed pipe back.

Optionally, the middle part of sleeve pipe lower surface is provided with the stopper, the inside wall of stopper has seted up the screw thread, the pitch of screw thread is 2mm, the screw thread with stopper looks adaptation is seted up to the bottom on sample screen pipe surface.

Optionally, the limiting device comprises a limiting barrel, a spring is fixedly connected to the inner bottom wall of the limiting barrel, a limiting rod is fixedly connected to one end of the spring, and limiting holes matched with the limiting rod are formed in two sides of the lower surface of the extension drill rod.

Optionally, the inner side wall of the sleeve is provided with a sliding groove, and the sliding groove is in clearance fit with the limiting ring.

Optionally, the number of the air holes is a plurality, and the air holes are arranged on the surface of the sampling sieve tube at equal intervals.

(III) advantageous effects

The utility model provides a device that is used for seabed shallow layer gas to explore and take a sample possesses following beneficial effect: the device for exploring and sampling seabed shallow gas is characterized in that through the arrangement of a sleeve, a sampling sieve tube, a conical head, a vent hole, a limiting ring, a limiting device, an extension drill rod, a fixed tube, a valve, a pressure gauge and a sampling tube, the sleeve is extended to a sampling target layer through the extension drill rod, the sampling sieve tube is in a closed state in the process, the limiting device limits the position of the extension drill rod after the extension drill rod is connected with the sleeve, the extension drill rod is prevented from rotating to separate the sleeve from the extension drill rod, the extension drill rod is rotated to drive the sleeve to rotate so that the sleeve is separated from the sampling sieve tube in a reverse thread way and the sleeve is lifted upwards to take out the sampling sieve tube, the limiting ring limits the sampling sieve tube, gas enters the sampling sieve tube through the air holes, the valve B is closed, an operator opens the valve A to observe a pressure gauge so as to measure, connect the sampling bottle in the one end of sampling tube, open valve B and make gas get into the sampling bottle and then accomplish the sample.

Drawings

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

FIG. 2 is a cross-sectional view of the sleeve in the fixed state of the present invention;

FIG. 3 is a sectional view of the sleeve according to the present invention;

FIG. 4 is a perspective view of the sampling sieve tube of the present invention;

FIG. 5 is an enlarged view of the point A of FIG. 1 according to the present invention;

fig. 6 is a cross-sectional view of the limiting device of the present invention.

In the figure: 1. a sleeve; 2. sampling a sieve tube; 3. a conical head; 4. air holes are formed; 5. a limiting ring; 6. butt-joint pipes; 7. extending the drill rod; 8. a fixed tube; 9. a pressure gauge; 10. a sampling tube; 11. a limiting block; 12. a valve A; 13. a valve B; 14. a limiting device; 1401. a limiting cylinder; 1402. a spring; 1403. a limiting rod.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

Referring to fig. 1 to 4, the present invention provides a technical solution: a device for seabed shallow gas exploration and sampling comprises a sleeve 1, the bottom of the sleeve 1 is in threaded connection with a sampling sieve tube 2, the middle of the lower surface of the sleeve 1 is provided with a limit block 11, the inner side wall of the limit block 11 is provided with threads, the thread pitch of the threads is 2mm, the bottom of the surface of the sampling sieve tube 2 is provided with threads matched with the limit block 11, one end of the sampling sieve tube 2 is fixedly connected with a conical head 3, the surface of the sampling sieve tube 2 is provided with a plurality of air holes 4, the plurality of air holes 4 are arranged on the surface of the sampling sieve tube 2 at equal intervals, one end of the sampling sieve tube 2 is fixedly connected with a limit ring 5, an operator rotates an extension drill rod 7 to drive the sleeve 1 to rotate so that the sleeve 1 and the sampling sieve tube 2 are separated from each other by inverse threads and then the sleeve 1 is lifted to take out, sleeve pipe 1's inside wall is provided with the spout, the spout is clearance fit with spacing ring 5, the middle part fixedly connected with of sleeve pipe 1 upper surface is to taking over 6, the one end threaded connection who takes over 6 has extension drilling rod 7, the one end intercommunication of extension drilling rod 7 has solid fixed tube 8, gu fixed tube 8 surface has set gradually valve A12 from a left side right side, manometer 9 and valve B13, the middle part fixedly connected with sampling tube 10 at the solid fixed tube 8 back, the both sides of sleeve pipe 1 upper surface all are provided with stop device 14, stop device 14 includes spacing section of thick bamboo 1401, the interior diapire fixedly connected with spring 1402 of spacing section of thick bamboo 1401, the one end fixedly connected with gag lever post 1403 of spring 1402, the spacing hole with gag lever post 1403 looks adaptation is seted up to the both sides of.

The utility model discloses in, this a device that is used for seabed shallow layer gas to explore and take a sample, the working procedure as follows:

1. extend sleeve pipe 1 to sample purpose layer through extension drilling rod 7, sample screen pipe 2 is in airtight state among this process, and stop device 14 makes extension drilling rod 7 be spacing after being connected with sleeve pipe 1 for extension drilling rod 7 and sleeve pipe 1 syntropy rotate simultaneously, avoid rotating extension drilling rod 7 and make sleeve pipe 1 and extension drilling rod 7 separation.

2. The operator rotates the extension drill rod 7 to drive the sleeve 1 to rotate, so that the sleeve 1 is separated from the sampling sieve tube 2 by inverse threads and the sleeve 1 is lifted upwards, the sampling sieve tube 2 is taken out, and the limiting ring 5 limits the sampling sieve tube 2.

3. Gas enters the sampling sieve tube 2 through the vent holes 4, the valve B13 is closed, the valve A12 is opened, an operator observes the pressure gauge 9 and then measures and records the air pressure change condition, the sampling bottle is connected to one end of the sampling tube 10, and the valve B13 is opened to enable the gas to enter the sampling bottle and then complete sampling.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. An apparatus for seabed superficial gas exploration and sampling, comprising a casing (1), characterized in that: the bottom threaded connection of sleeve pipe (1) has sample screen pipe (2), the one end fixedly connected with conical head (3) of sample screen pipe (2), bleeder vent (4) have been seted up on the surface of sample screen pipe (2), the one end fixedly connected with spacing ring (5) of sample screen pipe (2), the middle part fixedly connected with of sleeve pipe (1) upper surface is to managing (6), the one end threaded connection who manages (6) has extension drilling rod (7), the one end intercommunication of extension drilling rod (7) has fixed pipe (8), fixed pipe (8) surface has set gradually valve A (12), manometer (9) and valve B (13) from a left side right side, the middle part fixedly connected with sampling tube (10) at the fixed pipe (8) back, the both sides of sleeve pipe (1) upper surface all are provided with stop device (14).

2. The apparatus for subsea shallow gas exploration and sampling according to claim 1, characterized in that: the middle part of sleeve pipe (1) lower surface is provided with stopper (11), the screw thread has been seted up to the inside wall of stopper (11), the pitch of screw thread is 2mm, the screw thread with stopper (11) looks adaptation is seted up to the bottom on sample screen pipe (2) surface.

3. The apparatus for subsea shallow gas exploration and sampling according to claim 1, characterized in that: the limiting device (14) comprises a limiting cylinder (1401), a spring (1402) is fixedly connected to the inner bottom wall of the limiting cylinder (1401), a limiting rod (1403) is fixedly connected to one end of the spring (1402), and limiting holes matched with the limiting rod (1403) are formed in two sides of the lower surface of the extension drill rod (7).

4. The apparatus for subsea shallow gas exploration and sampling according to claim 1, characterized in that: the inner side wall of the sleeve (1) is provided with a sliding groove, and the sliding groove is in clearance fit with the limiting ring (5).

5. The apparatus for subsea shallow gas exploration and sampling according to claim 1, characterized in that: the number of the air holes (4) is a plurality, and the air holes (4) are arranged on the surface of the sampling sieve tube (2) at equal intervals.