Fixed-point sampling device

Abstract

The utility model relates to the technical field of oil tank sampling tools, in particular to a fixed-point sampling device which comprises a bottle body and a lifting rod, a bottle plug is arranged at an opening of the bottle body, and a switch structure is arranged at the top end of the bottle plug to connect the bottle plug with a cable; a lifting rod fixer is arranged on the side wall of the bottle body; and the bottom end of the lifting rod is connected with the top end of the lifting rod fixer and extends upwards. According to the fixed-point sampling device provided by the utility model, the lifting rod fixer is arranged on the side wall of the bottle body, and the bottom end of the lifting rod extending upwards is connected with the lifting rod fixer, so that the lifting rod is responsible for lowering the bottle body in the sampling work, and the movement state of the bottle body cannot be influenced by the flowing, impact and buoyancy of a liquid flow; the bottle body is prevented from being opened in advance due to shaking and separation from the bottle plug in the lowering process, meanwhile, the influence of liquid on the lowering position of the bottle body can be avoided, the bottle body can be accurately lowered to a preset position, errors of the lowering position are reduced, errors in the lowering process of sampling work are reduced, and the working efficiency and accuracy of the sampling work are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to oil tank sampling tool technical field especially relates to a fixed point sampling device. BACKGROUND

[0002] In the oilfield production process, the crude oil after being produced from the downhole is saved in the storage tank in the joint station and the switching station and other places according to the different work processes in the subsequent production work, due to the large volume of the storage tank, in the working process, in order to understand the specific situation of the oil liquid at each position in the storage tank, the oil liquid at each position in the storage tank needs to be sampled. In the prior art, there is a sampling device, the sampler is lowered to the sampling position in the oil liquid by the soft rope, the soft rope is pulled to open the top cover of the sampling container and continue to pull the soft rope to recover the sampling device; in addition, there is a sampling device which is processed into a spiral shape between the pull rings to improve the opening efficiency of the sampling container. However, in the prior art, one soft rope is responsible for the opening, lowering and recovery of the device at the same time, in the lowering process, the soft rope is affected by the oil liquid buoyancy and the liquid flow impact, the sampling container is easily shaken before reaching the working position, which affects the sampling result, and under the influence of the liquid flow, the sampling device shakes in the liquid, which causes the deviation between the lowered position and the required position, and the sampling position is not accurate. Therefore, in view of the above shortcomings, a fixed point sampling device is provided. SUMMARY

[0003] The utility model aims at providing a kind of fixed point sampling device to overcome the defects that sampling device in prior art opens in advance before reaching working position and the large deviation of lowered position.

[0004] In order to achieve the above-mentioned purpose, the utility model provides a kind of fixed point sampling device, comprising:

[0005] The bottle body and the lifting rod, the bottle body top end opening, the bottle plug is arranged at the opening of the bottle body, the size of the bottle plug is matched with the opening of the bottle body;The sidewall of the bottle body is provided with a lifting rod fixator, the lifting rod fixator is connected with the bottom end of the lifting rod, and the top end of the lifting rod extends upward to the wellhead;The bottle plug top end is provided with a switch structure to control the opening and closing of the bottle plug, and the switch structure is provided with a cable extending upward and connecting the cable with the bottle plug.

[0006] Preferably, the lifting rod is composed of a plurality of identical link rods connected end to end, the inner wall of the top end of each link rod is provided with an internal thread, the bottom end is provided with an external thread, and the internal thread of the top end of the link rod is matched with the external thread of the bottom end of the link rod.

[0007] Preferably, the lifting rod fixator is cylindrical, and the sidewall is fixedly connected with the outer wall of the bottle body.

[0008] Preferably, the bottom end of the lowermost connecting rod in the lifting rod is inserted into the lifting rod fixer, and the lifting rod fixer is internally threaded and matched with the external thread of the bottom end of the connecting rod.

[0009] Preferably, the switch structure comprises a pull ring and a pull ring holder, the bottom end of the pull ring is connected with the bottle plug, and the top end is connected with a cable extending to the well mouth; the pull ring holder is U-shaped and located directly above the bottle plug, and the two ends of the U-shaped pull ring holder are connected to the outer wall of the bottle body.

[0010] Preferably, the pull ring has two pull rings arranged in a straight line, the upper pull ring is connected with the cable, and the lower pull ring is connected with the bottle plug; a vertically rigid connecting rod is arranged between the two pull rings, and the upper and lower ends of the connecting rod are connected to the upper and lower pull rings respectively.

[0011] Preferably, the top end of the pull ring holder is provided with a guide hole penetrating through the top and bottom, the connecting rod is inserted into the guide hole, and the diameter of the pull ring is greater than the diameter of the guide hole.

[0012] The fixed-point sampling device has the following beneficial effects:

[0013] The fixed-point sampling device has the following beneficial effects: BRIEF DESCRIPTION OF DRAWINGS

[0014] Fig. 1 It is a fixed-point sampling device structure diagram;

[0015] Fig. 2 It is a fixed-point sampling device lifting rod fixer and lifting rod cooperation diagram;

[0016] Fig. 3 It is a fixed-point sampling device connecting rod structure diagram.

[0017] LEGEND:

[0018] 1, bottle body; 2, bottle plug; 3, pull ring holder; 4, pull ring; 5, lifting rod fixer; 6, connecting rod. DETAILED DESCRIPTION

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] like Figs. 1-3 As shown, this utility model provides a fixed-point sampling device, comprising: a bottle body 1 and a lifting rod. The top of the bottle body 1 is open, and a bottle stopper 2 is provided at the opening of the bottle body 1. The size of the bottle stopper 2 matches the opening of the bottle body 1. The bottle body 1 serves as the main body of the sampling device, responsible for carrying the sample and bringing it out of the storage tank. During operation, after the bottle body 1 is placed into the storage tank at the designated position, the bottle body 1 is opened. Under the action of hydraulic pressure, the surrounding liquid will flow into the bottle body 1. At this time, the bottle body 1 can be retrieved to remove the liquid sample from the designated position from the storage tank, completing the sampling work at the designated position. The bottle stopper 2 is used to control the opening and closing state of the bottle body 1. Normally, the bottle stopper 2 seals the opening of the bottle body 1, preventing liquid from flowing into the bottle body 1. At this time, the bottle body 1 is in the closed state. After the bottle body 1 reaches the working position, the bottle stopper 2 can be removed to open the bottle body 1 for sampling. Normally, the top of the bottle stopper 2 is provided with a switch structure to control the opening and closing of the bottle stopper 2. An upward-extending cable is provided above the switch structure and connects the cable to the bottle stopper 2. Once bottle 1 reaches the designated position, staff outside the storage tank can pull the cable to lift stopper 2, separating it from bottle 1, thus opening bottle 1 for sampling.

[0021] The switch structure includes a pull ring 4, the bottom of which is connected to the bottle stopper 2, and the top of which is connected to a cable extending to the wellhead. The pull ring 4 is typically circular, and under the impact and pressure of the downhole fluid, even if the pull ring 4 rotates, it will not jam against the bottle stopper 2. Connecting the cable to the bottle stopper 2 via the pull ring 4 allows the cable to be directly attached to the pull ring 4, eliminating the need for additional machining on the bottle stopper 2 for cable connection, thus simplifying the device structure. Additionally, the switch structure includes a pull ring mounting bracket 3, which is U-shaped and located directly above the bottle stopper 2, with both ends of the U-shape connected to the outer wall of the bottle body 1. The pull ring bracket 3 primarily serves to limit the pull ring 4, preventing it from pulling the bottle stopper 2 away from the bottle body 1 during operation, reducing the difficulty of device retrieval and improving the device's working efficiency.

[0022] It should be noted that the pull ring 4 has two in total, two pull ring 4 arranged in a straight line up and down, the pull ring 4 connected to the cable located above, the pull ring 4 connected with the bottle plug 2 located below; two pull ring 4 between the vertical and hard connection rod is provided, the upper and lower ends of the connecting rod are connected to the two pull ring 4 above and below respectively. The top of the pull ring frame 3 is provided with a through hole, the connecting rod is inserted into the guide hole, and the diameter of the pull ring 4 is greater than the guide hole. After the two pull ring 4 forms a whole through the connecting rod, the connecting rod is inserted into the guide hole at the top of the pull ring frame 3, and the connecting rod can move up and down in the vertical direction in the guide hole at this time. When the cable is pulled up, the pull ring 4 above is driven by the pulling force of the cable to drive the connecting rod and the pull ring 4 below to move upward along the guide hole to drive the bottle plug 2 to move upward to open the opening of the bottle body 1. When moving to the limit position, the pull ring 4 cannot pass through the guide hole, thereby limiting the upward movement distance of the bottle plug 2 and the pull ring 4, preventing the bottle plug 2 from falling off. After the sampling work is completed, the cable is loosened, and at this time the bottle plug 2, the connecting rod and the pull ring 4 move downward along the guide hole under the action of their own gravity, so that the bottle plug 2 falls back to the opening of the bottle body 1 under the influence of gravity to seal the bottle body 1, thereby realizing the resealing of the bottle body 1.

[0023] As shown in Figs. 1-3 The side wall of the bottle body 1 is provided with a lifting rod fixing device 5, and the bottom end of the lifting rod is connected with the lifting rod fixing device 5. The top end of the lifting rod extends upward. During the process of lowering and recovering the device, the worker can hold the top end of the lifting rod outside the storage tank to directly extend the lifting rod into the storage tank and send the bottle body 1 connected with the lifting rod fixing device 5 to the designated sampling position through the lifting rod. At this time, the device no longer relies on the soft rope such as cable to lower down, but is lowered down to the working position by the lifting rod. Even if affected by the impact of liquid and buoyancy, it will not shake in the well, avoiding the shaking of the device in the storage tank, which leads to the separation of the bottle body 1 and the bottle plug 2, resulting in the premature opening of the device. Similarly, since the bottle body 1 no longer shakes due to the impact of liquid and buoyancy, it can be sent to the designated working position through the lifting rod during the lowering process, thereby improving the accuracy of the device lowering and improving the work efficiency and accuracy of the sampling work.

[0024] The lifting rod is composed of several same-shaped connecting rods 6 connected end to end. The inner wall of the top end of each connecting rod 6 is provided with an internal thread, and the bottom end is provided with an external thread. The internal thread of the top end of the connecting rod 6 cooperates with the external thread of the bottom end of the connecting rod 6. In the working process, the number of connecting rods 6 constituting the lifting rod is determined according to the height of the target position of the lowering, so that the length of the lifting rod can lower the bottle body 1 to the working position. Generally, the material of the connecting rod 6 is glass fiber reinforced plastic and the inside is hollow. Since the glass fiber reinforced plastic itself has high strength, the lifting rod formed by the connecting rod 6 with a hollow structure can fix the position of the bottle body 1 in the working process without being affected by the buoyancy and impact of the liquid, thereby greatly reducing the weight of the device and reducing the working intensity of the workers. The length of the connecting rod 6 is usually 1 m, and by changing the number of connecting rods 6, almost all sampling work can be adapted, and storage and transportation are facilitated.

[0025] It should be noted that the lifting rod fixer 5 is cylindrical, and the side wall is fixedly connected with the outer wall of the bottle body 1. Generally, the lifting rod fixer 5 and the bottle body 1 are connected by welding. After the lifting rod fixer 5 is connected with the lifting rod, the bottle body 1 moves synchronously with the lifting rod fixer 5 to realize lowering and recovery in the sampling work. The bottom end of the lowermost connecting rod 6 in the lifting rod is inserted into the lifting rod fixer 5. The lifting rod fixer 5 is provided with an internal thread which cooperates with the external thread of the bottom end of the connecting rod 6. In the sampling work, the thread of the bottom end of the lowermost connecting rod 6 of the lifting rod is inserted into the lifting rod fixer 5 to complete the installation, thereby simplifying the structure of the device and improving the working efficiency of the device.

[0026] In combination with Figs. 1 to 3 The working steps of the fixed-point sampling device during sampling will be described in detail as follows:

[0027] Step one, select the appropriate number of connecting rods according to the distance of the sampling position, and select the appropriate length of the cable;

[0028] Step two, connect and fix one end of the cable to the upper pull ring in the switch structure, and install the connecting rods on the lifting rod fixer to form the lifting rod. At this time, first fix the bottom end of a connecting rod into the thread in the lifting rod fixer, and then connect the remaining connecting rods one by one from bottom to top on the already fixed connecting rod, and connect the connecting rods to form the lifting rod through the thread.

[0029] Step three, hold the lifting rod and the cable by hand, and gradually extend the bottle body into the lowering position in the storage tank. In this process, the liquid in the storage tank will exert a buoyant force on the bottle body and the lifting rod, and the liquid will also contact and impact the bottle body when flowing. Since the lifting rod has sufficient strength, the position of the bottle body is fixed during lowering to avoid swinging of the bottle body in the liquid.

[0030] Step four, pull up the cable, open the bottle plug. At this time, the cable drives the upper pull ring in the switch structure to move up, and drives the lower pull ring to pull up the bottle plug through the connecting rod. The bottle plug moves up and leaves the bottle opening to open the bottle.

[0031] Step five, lower the cable, reseal the bottle. At this time, the bottle plug is only affected by its own gravity due to the loss of upward pulling force, and gradually falls down. The bottle plug falls back to the bottle opening to reseal the bottle due to the cooperation of the guide hole in the pull ring frame and the connecting rod.

[0032] Step six, after recycling the device by pulling up the lifting rod, disassembling the connecting rod and the cable, and taking out the liquid in the bottle, the sampling is completed.

[0033] Finally, it should be pointed out that the above is only the preferred embodiment of the present application and is not intended to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or make equivalent replacements to some technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A spot sampling device, characterized by, The utility model relates to a bottle body (1) and lifting rod, the bottle body (1) top end is open, is equipped with the bottle plug (2) at the opening of bottle body (1), the bottle plug (2) size is matched with the opening of bottle body (1), the sidewall of bottle body (1) is equipped with lifting rod fixer (5), lifting rod fixer (5) is connected with the bottom end of lifting rod, and the top end of lifting rod extends upwards, the top end of bottle plug (2) is equipped with switch structure control bottle plug (2) switch, and the switch structure top is equipped with the cable that extends upwards and connects cable and bottle plug (2). The lifting rod is composed of a plurality of connecting rods (6) connected head to tail, the inner wall of the top end of connecting rod (6) is provided with internal thread, the bottom end is provided with external thread, and the internal thread of the top end of connecting rod (6) is matched with the external thread of the bottom end of connecting rod (6).

2. The spot sampling device of claim 1, wherein, The lifting rod fixer (5) is cylindrical, and the sidewall is fixedly connected with the outer wall of bottle body (1).

3. The spot sampling device of claim 2, wherein, The bottom end of the lowermost connecting rod (6) in the lifting rod is inserted into the lifting rod fixer (5), the lifting rod fixer (5) is provided with internal thread and matched with the external thread of the bottom end of connecting rod (6).

4. The spot sampling device of claim 3, wherein, The switch structure includes a pull ring (4) and a pull ring holder (3), the bottom end of pull ring (4) is connected with bottle plug (2), and the top end is connected with a cable extending to the well mouth, the pull ring holder (3) is U-shaped and located directly above bottle plug (2), and the two ends of the U-shaped pull ring holder (3) are connected to the outer wall of bottle body (1).

5. The spot sampling device of claim 4, wherein, The pull ring (4) has two, and the two pull rings (4) are arranged in a straight line up and down, the pull ring (4) located above is connected to the cable, and the pull ring (4) located below is connected with bottle plug (2), a vertical and hard connecting rod is arranged between the two pull rings (4), and the upper and lower ends of the connecting rod are connected to the two pull rings (4) located above and below respectively.

6. The spot sampling device of claim 5, wherein, The top end of the pull ring holder (3) is provided with a guide hole penetrating up and down, the connecting rod is inserted into the guide hole, and the diameter of the pull ring (4) is greater than the guide hole.

7. The spot sampling device of claim 6, wherein, ​

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