Device for collecting water samples at different depths in offshore drilling

Abstract

The utility model discloses a different-depth water sample collecting device for offshore drilling. The different-depth water sample collecting device comprises a barrel body and a barrel cover, a gravity block is connected to the cylinder body, a lifting handle is connected to the upper portion of the cylinder bottom, and an inelastic rope A is connected to the lifting handle; the cylinder cover is matched with an opening in the top of the cylinder body and is in sliding fit with the handle, the bottom of the cylinder cover is connected with a sealing piece, and the cylinder cover is connected with an upper opening of the cylinder body through a magnetic piece; the top of the barrel cover is connected with a lifting hook, and the lifting hook is connected with an inelastic rope B; the size of a cylinder opening of the cylinder body is smaller than the size of the outer diameter of the cylinder body; and the gravity block is a solid body and is fixedly connected to the bottom end of the cylinder bottom. Compared with the prior art, the water sample obtained by the device disclosed by the utility model is more representative, the test data is more accurate and reliable, and the device can be reused.

Description

Technical Field

[0001] The utility model relates to the technical field of water sample collection devices, in particular to a water sample collection device for different depths in offshore drilling. Background Technique

[0002] The development and utilization of the ocean are gradually moving from the coastline to the near and far seas and even deeper directions, and the water depth is getting deeper and deeper. At present, most of the pile foundation types in offshore infrastructure projects use steel pipe piles, which have extremely high anti-corrosion requirements for seawater. Affected by submarine ocean currents, sea areas, climate, etc., at the same point and different depths, there are obvious differences in the corrosiveness of seawater. The main challenges for offshore geological exploration are drilling operation ships, operation platforms, construction techniques, construction methods, large water depth and surging waves, etc. At present, such situations have been basically solved or improved, but there are still relatively large problems in collecting water samples at different depths at the same point.

[0003] At present, when collecting fixed-depth water samples in ocean geological exploration, the drill pipe is mainly lowered to the depth where the water sample needs to be collected. The upper part of the drill pipe is connected to a mud pump through a flexible hose, and the water sample is sucked up through the mud pump, flexible hose and drill pipe. There are the following disadvantages in collecting water samples in this way: 1) The quality of the collected water sample is greatly affected by the mud and oil in the pipe (there is lubricating oil at the drill pipe joints) and the suction time (if the time is short, the water in the pipe is not from that depth); 2) In offshore exploration, the construction window period is short, affected by seasons, etc., the effective construction operation cycle is short, the cost of chartering a ship, etc. is high, and it takes a lot of time and economic costs to collect water samples; 3) The time for collecting water samples is severely controlled. Normally, drilling construction is carried out first, and after the drilling is completed, there is spare time to collect water samples. When collecting water samples, the position needs to be moved appropriately (extracting the casing near the drill hole, the mud and lubricating oil at the pipe joints in the pipe have a certain pollution to the water body around the hole), and then the drill pipe and mud pump can be used to collect water samples; 4) If the collected water sample cannot be delivered to the laboratory in time by the construction ship and the traffic ship, and it exceeds the specification requirement of 24 hours, it will affect the accuracy of the experimental data.

[0004] In this way, the collected samples are not representative and the data reliability is poor, and there is still a large room for improvement in the water sample collection process. Content of the Utility Model

[0005] The purpose of the utility model is to provide a water sample collection device for different depths in offshore drilling, so that the obtained water samples are more representative, ensure that the test data is more accurate and reliable, and the device can be reused, so as to solve the problems put forward in the above background technique.

[0006] To achieve the above purpose, the utility model provides the following technical solutions:

[0007] A water sample collection device for offshore drilling at different depths, comprising a cylinder body and a cylinder cover; a gravity block is connected to the cylinder body, a handle is connected above the bottom of the cylinder, and an inelastic rope A is connected to the handle; the cylinder cover is adapted to the opening at the top of the cylinder body, the cylinder cover is slidably fitted to the handle, a sealing member is connected to the bottom of the cylinder cover, and the cylinder cover and the upper opening of the cylinder body are connected by a magnetic member; a lifting hook is connected to the top of the cylinder cover, and an inelastic rope B is connected to the lifting hook.

[0008] A further improvement of the present utility model is that the cylinder body is in a circular cylindrical shape, and the size of the cylinder opening of the cylinder body is smaller than the outer diameter size of the cylinder body; the gravity block is a solid body, and the gravity block is fixedly connected to the bottom end of the cylinder bottom.

[0009] A further improvement of the present utility model is that the handle is in a "U" shape, and long waist-shaped chutes are vertically arranged on both sides of the handle; the top of the cylinder cover is a solid circular plate, and the bottom is a solid cone, and sliding rods are connected to both sides of the circular plate, the sliding rods are slidably fitted to the chutes, and a baffle and a nut are respectively connected to the sliding rods on both sides of the chute.

[0010] A further improvement of the present utility model is that the sealing member is a rubber sealing ring, and the rubber sealing ring is sleeved on the outer circular surface of the cone of the cylinder cover.

[0011] A further improvement of the present utility model is that the magnetic member is a magnet, and the magnets are symmetrically arranged in two groups, and two magnets in the same group are respectively connected to the side parts of the circular plate and the cylinder opening.

[0012] A further improvement of the present utility model is that a through hole is provided at the center of the top of the handle, and the lifting hook passes through the through hole and is fixedly connected to the center of the top of the circular plate.

[0013] A further improvement of the present utility model is that two buckle rings are symmetrically connected to the top end of the handle, and the bottom end of the inelastic rope A is connected to the two buckle rings.

[0014] The beneficial effects of the present utility model:

[0015] The water sample collection device for offshore drilling at different depths of the present utility model obtains more representative water samples, ensures that the test data is more accurate and reliable, and the device can be reused.

[0016] The water sample collection device for offshore drilling at different depths of the present utility model can be carried out synchronously with the drilling operation, saving a large amount of time, labor (this device only needs one person to operate, and the original water sample collection method requires a shift of personnel) and economic costs (mainly referring to the charter fee, and the short offshore operation time, and the loss caused by the water sample collection affecting the drilling operation), while reducing the physical strength of the construction personnel and improving the work efficiency.

[0017] The utility model provides a device for collecting water samples at different depths during offshore drilling, which can deliver water samples at any time, shorten the time for samples to arrive at the laboratory, and provide a safety guarantee for more accurate test data.

[0018] The utility model discloses a device for collecting water samples at different depths for offshore drilling. Except for the elastic rope and the rubber sealing ring, other materials are all made of stainless steel, which has the functions of corrosion resistance and rust resistance, so as to facilitate long-term repeated use. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0020] Figure 2 It is a schematic diagram of the cylinder and gravity block structure of the utility model.

[0021] Figure 3 It is a schematic diagram of the cylinder cover structure of the utility model.

[0022] In the figure: 1-cylinder body, 101-cylinder mouth, 2-cylinder cover, 201-round plate, 202-cone, 203-slide rod, 3-gravity block, 4-handle, 401-slide groove, 402-through hole, 5-inelastic rope A, 6-hook, 7-inelastic rope B, 8-baffle, 9-nut, 10-rubber sealing ring, 11-magnet, 12-cable buckle. DETAILED DESCRIPTION

[0023] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0024] Example 1: Figures 1 to 3 As shown, a device for collecting water samples at different depths in offshore drilling comprises a cylinder 1 and a cylinder cover 2. The cylinder 1 for collecting water samples is a φ100mm round cylinder with a height of 240mm and a 40mm closing on the upper side. The cylinder mouth 101 is closed to φ70mm to facilitate the installation of a handle 4 and a magnet 11. The handle 4 is installed on the opposite side of the central axis at the closing part of the main cylinder 1 and on the opposite side of the vertical central axis. Two magnets 11 with a diameter of 20mm*20mm and a thickness of 10mm are welded at the upper mouth of the cylinder 1. A solid gravity block 3 with a diameter equal to that of the cylinder 1 and a height of 50mm is welded at the lower part of the cylinder 1.

[0025] The upper part of the cylinder cover 2 uses a solid circular plate 201 with a diameter of φ80mm and a height of 10mm. The lower part uses a solid cone 202 with an upper diameter of φ70mm and a lower diameter of φ40mm and a height of 20mm. A rubber sealing ring 10 with a height of 10mm is installed on its upper part. On both symmetric sides of the upper part of the cylinder cover 2, φ4mm slide bars 203 are welded. On the inner sides of the two slide bars 203, they are fixed by φ10mm circular baffles 8, and on the outer sides, they are fixed by φ10mm octagonal nuts 9. The slide bars 203 slide up and down in the chute 401 on both sides of the handle 4. The baffle 8 and the octagonal nut 9 are respectively fixed on both sides of the chute 401 to play a limiting role. On the vertical symmetric side of the upper part of the cylinder cover 2 and the fixed shaft, two magnets 11 with a size of 20mm (L) * 10mm (H) and a thickness of 10mm are welded, corresponding to the positions of the magnets 11 on the upper opening of the cylinder body 1 one by one. At the midpoint of the top of the cylinder cover 2, a hook 6 with a diameter of φ6mm and a main rod length of 90mm is welded. The inner diameter of the upper hook of the hook 6 is 10mm.

[0026] The width of both sides of the handle 4 is 12mm, the height is 130mm, and the thickness is 3mm. A chute 401 with a width of 6mm and a height of 87mm is dug inside, and both ends of the chute 401 are semi-circular.

[0027] The width of the top of the handle 4 is 12mm, the length is 100mm, and the thickness is 3mm. A through hole 402 with a diameter of φ10mm is dug in the middle, and the main rod of the hook 6 passes through it for limiting use. The width of the outer horizontal bar around the through hole 402 is extended to φ20mm. On both sides of the upper part of the horizontal bar of the handle 4, a buckle 12 is welded respectively for buckling the non-elastic rope B7.

[0028] Except for the non-elastic rope A5, the non-elastic rope B7 and the rubber sealing ring 10, the other materials of the device are made of stainless steel, which has functions such as anti-corrosion and rust prevention, so as to facilitate long-term repeated use.

[0029] The specific working principle of the present utility model is as follows:

[0030] When the present utility model takes water samples at different depths for water quality analysis and testing, the pre-made water intake cylinder body 1 sinks under the action of the gravity block 3 below. The gravity of the gravity block 3 is more than twice the buoyancy of the cylinder body 1. The depth is controlled by the non-elastic rope A5 with length marks on it. The non-elastic rope B7 with length marks and the magnets 11 on the cylinder body 1 and the cylinder cover 2 control the opening and closing of the cylinder cover 2 at the same time for water sample collection. Both the non-elastic rope A5 and the non-elastic rope B7 have the same depth marks, and the zero point of the depth marks starts from the cylinder opening 101.

[0031] Specifically, before collecting the water sample, the inside of the cylinder body 1 is cleaned with pure fresh water and drained; the cylinder cover 2 is connected to and sealed with the cylinder body 1. Holding the non-elastic rope A5, the water sample collection device sinks to the depth where the water sample needs to be taken under the action of the gravity block 3. The cylinder opening 101 of the cylinder body 1 is the specific position for collecting the water sample. After reaching the water sample collection depth, the non-elastic rope B7 is lifted simultaneously. When the depths of the two ropes are the same, the non-elastic rope A5 is released. Holding the non-elastic rope B7, it is shaken with appropriate force. In this way, under the action of the gravity block 3, the cylinder body 1 is naturally separated from the cylinder cover 2. After standing for a while until the cylinder body 1 is full of water, the non-elastic rope A5 is lifted to the same depth as the non-elastic rope B7, and the non-elastic rope B7 is released. Under the action of its own gravity, the cylinder cover 2 sinks automatically through the slide rod 203 and the two fixed edges along the chute 401 of the handle 4 until it sinks to the magnetic attraction range of the magnets 11 on the cylinder body 1 and the cylinder cover 2. The cylinder body 1 and the cylinder cover 2 are firmly attracted by the four magnets 11. Under the action of the rubber sealing ring 10 on the cylinder cover 2, the water inside and outside the cylinder body 1 is completely isolated. Then, the non-elastic rope A5 is extracted, and the water sample collection device is lifted onto the drilling ship. Then, the water in the cylinder body 1 is filled into a pre-prepared sample bottle.

[0032] The utility model is applicable to collecting water samples at different water depths during offshore drilling and is not suitable for use when the tidal current velocity is too high.

[0033] The above embodiments are only used to illustrate the technical concept and features of the utility model, and the purpose is to enable those who are familiar with this technology to understand the content of the utility model and implement it accordingly, and it cannot be used to limit the protection scope of the utility model. All equivalent transformations or modifications made according to the spirit and essence of the utility model should be covered within the protection scope of the utility model.

Claims

1. A device for collecting water samples at different depths for offshore drilling, characterized in that: The invention comprises a cylinder (1) and a cylinder cover (2); a weight block (3) is connected to the cylinder (1); a handle (4) is connected to the top of the cylinder bottom; a non-elastic rope A (5) is connected to the handle (4); the cylinder cover (2) is adapted to the opening at the top of the cylinder (1); the cylinder cover (2) is slidably matched with the handle (4); a sealing member is connected to the bottom of the cylinder cover (2); and the cylinder cover (2) is connected to the upper opening of the cylinder (1) via a magnetic member; a lifting hook (6) is connected to the top of the cylinder cover (2); a non-elastic rope B (7) is connected to the lifting hook (6).

2. The device for collecting water samples at different depths for offshore drilling according to claim 1, characterized in that: The cylinder (1) is in the shape of a circular cylinder, and the size of the cylinder mouth (101) of the cylinder (1) is smaller than the outer diameter of the cylinder (1); the gravity block (3) is a solid body, and the gravity block (3) is fixedly connected to the bottom end of the cylinder bottom.

3. A device for collecting water samples at different depths for offshore drilling as claimed in claim 1 or 2, characterized in that: The handle (4) is in a "U" shape, and vertically arranged long waist-shaped sliding grooves (401) are provided on both sides of the handle (4); the top of the cylinder cover (2) is a solid circular plate (201), and the bottom is a solid cone (202), and sliding rods (203) are connected to both sides of the circular plate (201), and the sliding rods (203) are slidably matched with the sliding grooves (401), and baffles (8) and nuts (9) are respectively connected to the sliding rods (203) on both sides of the sliding groove (401).

4. The device for collecting water samples at different depths for offshore drilling as claimed in claim 3, characterized in that: The sealing member is a rubber sealing ring (10), which is sleeved on the outer circumferential surface of the cone (202) of the cylinder cover (2).

5. The device for collecting water samples at different depths for offshore drilling as claimed in claim 3, characterized in that: The magnetic member is a magnet (11), and the magnets (11) are arranged in two groups symmetrically, and the two magnets (11) in the same group are respectively connected to the side of the circular plate (201) and the barrel mouth (101).

6. The device for collecting water samples at different depths for offshore drilling as claimed in claim 1, characterized in that: A through hole (402) is provided at the center of the top of the handle (4), and the hook (6) passes through the through hole (402) and is fixed to the center of the top of the circular plate (201).

7. The device for collecting water samples at different depths for offshore drilling as claimed in claim 3, characterized in that: The top end of the handle (4) is symmetrically connected to two cable buckles (12), and the bottom end of the inelastic rope A (5) is connected to the two cable buckles (12).

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