Sampler for offshore oil exploitation

Abstract

The utility model belongs to the technical field of oil sampling, and discloses a sampler for offshore oil exploitation, which comprises a sampling mechanism, a sampling mechanism and a control mechanism, the stratified sampling assembly comprises a sampling barrel, three layers of sample cavities are formed in the sampling barrel, three sets of electric valves communicated with the three layers of sample cavities are installed on the outer side of the sampling barrel, and three sets of pumping pipes used for pumping petroleum samples in the sample cavities are arranged on the outer side of the sampling barrel; compared with the prior art, the stratified sampling device has the following beneficial effects that the stratified sampling assembly is designed and is connected with the hanging ring through the mooring rope, so that the sampler can be lowered into a vertical sampling pipeline, when the sampler reaches a first sampling layer, a group of electric valves are opened, and under the action of pressure difference and gravity, a petroleum sample of the layer flows into a corresponding sample cavity to complete collection; the first sampling layer continues to be lowered after collection, and the other two sets of electric valves are opened when the first sampling layer reaches other preset sampling layers, so that stratified sampling of petroleum in different depth layers is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a sampler for offshore oil exploitation belongs to petroleum sampling technical field. BACKGROUND

[0002] In the offshore oil exploitation operation, the vertical sampling pipeline is one of the important infrastructures, which is usually arranged on the offshore oil exploitation platform or the seabed wellhead device, vertically extends to the oil reservoir or the exploitation fluid flow path, and the vertical sampling pipeline provides a relatively stable fluid passage, so that the oil sample is convenient to sample.

[0003] However, the current sampler is difficult to classify and sample the oil at different depths, the offshore oil reservoir often has a vertical layered structure, and the oil at different depths has differences in key physical and chemical properties such as composition, density and viscosity, but the traditional sampling device mostly adopts a single sampling port or a simple one-time sampling mode, only mixed samples can be obtained, and the characteristics of oil at different depths cannot be distinguished, which makes it difficult for oil exploitation enterprises to accurately grasp the real situation inside the oil reservoir, and the exploitation scheme cannot be formulated, which is not conducive to accurate control of oil quality, and the quality of oil at different depths is uneven, mixed samples cannot truly reflect the quality of oil in each layer, which may lead to problems such as difficulty in processing, unstable product quality and the like in subsequent links such as oil refining and transportation.

[0004] In order to solve the above problems, the present application provides a sampler for offshore oil exploitation, UTILITY MODEL CONTENT

[0005] The utility model aims at the deficiency of prior art, provides a sampler for offshore oil exploitation, through design layered sampling assembly, utilize the cable and the ring connection, can put down the sampler to the vertical sampling pipeline, reach the first sampling layer, open a group of electric valve, under the action of pressure difference and gravity, the layer oil sample flows into the corresponding sample chamber and completes the collection, after the first sampling layer collection, continue to put down, reach other preset sampling layer, open another two groups of electric valve, realize the different depth layer oil stratified sampling, solve the problem raised in the above background technology.

[0006] A sampler for offshore oil exploitation, comprising: a sampling mechanism, including a layered sampling assembly and a submerging assembly; the layered sampling assembly comprises a sampling cylinder, three sample cavities are arranged in the sampling cylinder, three groups of electric valves are arranged outside the sampling cylinder and are communicated with the three sample cavities respectively, and three groups of pump suction pipes for sucking oil samples in the sample cavities are arranged outside the sampling cylinder; the submerging assembly comprises a conical weight head, a conical spiral piece for reducing the resistance of descending is arranged above the conical weight head, a detachable limiting outer ring is arranged above the conical spiral piece, and a plurality of universal balls for reducing the friction with the inner wall of the sampling pipeline are arranged outside the limiting outer ring.

[0007] As a preferred embodiment, the electric valves are installed in a downward inclination, and the three groups of pump suction pipes are connected with the three groups of sample cavities respectively.

[0008] As a preferred embodiment, a lifting ring is arranged above the sampling cylinder, and the diameter length of the sampling cylinder at the upper and lower ends is smaller than the diameter length of the middle part.

[0009] As a preferred embodiment, a motor cylinder is arranged below the sampling cylinder, a thread is arranged on the outer wall of the motor cylinder, a screw ring is connected with the thread outside the motor cylinder, and the screw ring is fixedly connected with the limiting outer ring through a plurality of connecting rods.

[0010] As a preferred embodiment, a driving motor is arranged in the motor cylinder, a transmission shaft is arranged below the motor cylinder, and the transmission shaft is detachably connected with the power shaft of the driving motor.

[0011] As a preferred embodiment, a conical block is arranged below the transmission shaft, the conical spiral piece is arranged outside the conical block, and the conical weight head is fixedly connected with the conical block.

[0012] As a preferred embodiment, a sealing box is arranged on one side of the sampling cylinder, a controller is arranged in the sealing box, and the controller is electrically connected with the electric valves and the driving motor.

[0013] Beneficial effects:

[0014] 1、By designing the layered sampling assembly, the whole sampler can be lowered into the vertical sampling pipeline by connecting the cable with the ring, when reaching the first sampling layer, open the corresponding group of electric valves, at this time, under the joint action of pressure difference and gravity, the oil sample of the layer will flow into the corresponding sample chamber through the opened electric valve, completing the sampling of the oil sample of the layer, after completing the sampling of the first sampling layer, continue to lower, when lowering to other preset sampling layers, open the other two groups of electric valves, in this way, the oil samples of different depth layers will enter the corresponding sample chambers respectively, thereby realizing the layered sampling operation of the oil of different depth layers, in the sampling process, if it is necessary to obtain the sample in time, the pump suction pipe is quickly connected with the suction pump, the pump suction pipe will be lowered into the sampling pipeline synchronously with the sampler, when the sample enters the corresponding sample chamber smoothly, the suction pump is started, the suction pump will quickly extract the sample through the pump suction pipe to meet the demand of timely analyzing the sample, the flexible design improves the efficiency and adaptability of the sampling work.

[0015] 2、By designing the diving assembly, when the sampler is lowered in the sampling pipeline, the difference of the viscosity of oil at different depths will form resistance, causing the lowering to be blocked, affecting the sampling efficiency, then when lowering, the driving motor drives the conical spiral piece and the conical counterweight head to rotate synchronously, the conical spiral piece disturbs the oil in the rotating process, promoting it to form a state conducive to flow, effectively reducing the diving resistance; the conical structure is more convenient for rotating into viscous oil, reducing resistance, at the same time, the universal ball outside the limiting outer ring contacts with the inner wall of the sampling pipeline, not only plays a supporting and guiding role, but also greatly reduces friction, limits the position of the sampler, ensures that it is stably lowered along the vertical direction, and guarantees the smooth progress of the sampling work. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a whole structure schematic view of the sampler for offshore oil exploitation of the utility model;

[0017] Figure 2 It is a structure schematic view of another view angle of the sampler for offshore oil exploitation of the utility model;

[0018] Figure 3 It is a structure schematic view of the bottom view angle of the sampler for offshore oil exploitation of the utility model;

[0019] Figure 4 It is a structure schematic view of the section of the sampler for offshore oil exploitation of the utility model;

[0020] Figure 5 It is Figure 4 A enlarged structure schematic view of the A part.

[0021] In the figure, 1, layered sampling assembly; 11, sampling cylinder; 12, lifting ring; 13, pump suction pipe; 14, sealed box; 15, electric valve; 16, sample chamber; 2, submerging assembly; 21, conical weight head; 22, conical spiral fin; 23, conical block; 24, limiting outer ring; 25, universal ball; 26, connecting rod; 27, coil; 28, motor cylinder; 29, driving motor; 210, transmission shaft. DETAILED DESCRIPTION

[0022] 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.

[0023] Please refer to Figures 1-5 As shown in the figure, a sampler for offshore oil exploitation, comprising: a sampling mechanism, comprising a layered sampling assembly 1 and a submerging assembly 2; the layered sampling assembly 1 comprises a sampling cylinder 11, three layers of sample chambers 16 are arranged in the sampling cylinder 11, three groups of electric valves 15 are installed on the outer side of the sampling cylinder 11 and are in communication with the three layers of sample chambers 16 respectively, and three groups of pump suction pipes 13 for sucking oil samples in the sample chambers 16 are arranged on the outer side of the sampling cylinder 11; the submerging assembly 2 comprises a conical weight head 21, a conical spiral fin 22 is arranged above the conical weight head 21 and can rotate to reduce the resistance of descending, a detachable limiting outer ring 24 is arranged above the conical spiral fin 22, and a plurality of universal balls 25 are arranged on the outer side of the limiting outer ring 24 and are in contact with the inner wall of the sampling pipeline to reduce the friction.

[0024] Please refer to Figures 1-4 As shown in the figure, the electric valve 15 is installed downwardly inclined, and the three groups of pump suction pipes 13 are connected with the interiors of the three groups of sample chambers 16 respectively.

[0025] Please refer to Figure 1 , Figure 2 and Figure 4 As shown in the figure, the lifting ring 12 is installed above the sampling cylinder 11, and the diameters of the upper and lower ends of the sampling cylinder 11 are both smaller than the diameter of the middle part.

[0026] Please refer to Figure 1 , Figure 2 , Figure 4 and Figure 5As shown, the motor barrel 28 is installed below the sampling cylinder 11, and the outer wall of the motor barrel 28 is provided with threads, and the motor barrel 28 is threadedly connected with a spiral 27 outside, and the spiral 27 is fixedly connected with the limiting outer ring 24 through a plurality of connecting rods 26, according to different diameters of the pipeline, the limiting outer ring 24 with a diameter suitable for the pipeline can be selected, and the limiting outer ring 24 can be quickly disassembled through the threaded connection of the spiral 27, and after the lower part is disassembled, the limiting outer ring 24 can be replaced.

[0027] As shown in Figures 1-5 As shown, the motor barrel 28 is installed below the sampling cylinder 11, and the outer wall of the motor barrel 28 is provided with threads, and the motor barrel 28 is threadedly connected with a spiral 27 outside, and the spiral 27 is fixedly connected with the limiting outer ring 24 through a plurality of connecting rods 26, according to different diameters of the pipeline, the limiting outer ring 24 with a diameter suitable for the pipeline can be selected, and the limiting outer ring 24 can be quickly disassembled through the threaded connection of the spiral 27, and after the lower part is disassembled, the limiting outer ring 24 can be replaced.

[0028] As shown in Figure 1 、 Figure 2 and Figure 4 As shown, the motor barrel 28 is installed below the sampling cylinder 11, and the outer wall of the motor barrel 28 is provided with threads, and the motor barrel 28 is threadedly connected with a spiral 27 outside, and the spiral 27 is fixedly connected with the limiting outer ring 24 through a plurality of connecting rods 26, according to different diameters of the pipeline, the limiting outer ring 24 with a diameter suitable for the pipeline can be selected, and the limiting outer ring 24 can be quickly disassembled through the threaded connection of the spiral 27, and after the lower part is disassembled, the limiting outer ring 24 can be replaced.

[0029] As shown in Figures 1-2 As shown, the motor barrel 28 is installed below the sampling cylinder 11, and the outer wall of the motor barrel 28 is provided with threads, and the motor barrel 28 is threadedly connected with a spiral 27 outside, and the spiral 27 is fixedly connected with the limiting outer ring 24 through a plurality of connecting rods 26, according to different diameters of the pipeline, the limiting outer ring 24 with a diameter suitable for the pipeline can be selected, and the limiting outer ring 24 can be quickly disassembled through the threaded connection of the spiral 27, and after the lower part is disassembled, the limiting outer ring 24 can be replaced.

[0030] In use, the working principle of the utility model is as follows:

[0031] In the sampling operation of offshore oil exploitation, the sampling cylinder 11 is connected to the ring 12 above the cable, the sampling device is put into the vertical sampling pipeline, the universal ball 25 outside the limiting outer ring 24 is in contact with the inner wall of the sampling pipeline, not only plays a supporting role, but also can effectively reduce the friction, and ensures that the sampling device is stably lowered in the vertical direction, under the driving of gravity, the conical counterweight head 21 drives the whole sampling device to descend in the pipeline, due to the difference in viscosity of oil at different depths, resistance is formed, which causes the lowering to be blocked, the operator can transmit a control signal to the controller, and starts the driving motor 29, the power shaft 210 of the driving motor 29 rotates, and then the conical spiral piece 22 outside the conical block 23 below the driving shaft 210 starts to rotate synchronously with the conical counterweight head 21, the conical spiral piece 22 produces disturbance to the surrounding oil during rotation, promotes the oil to form a more favorable flowing state, and at the same time, the unique conical spiral design facilitates the rotation into the oil, and effectively reduces the resistance suffered by the sampling device when diving.

[0032] When the sampler reaches the predetermined sampling depth, the lowering position can be accurately judged according to the length of the cable lowering, when reaching the first sampling layer, the operator sends a control signal to the controller again, opens a corresponding group of electric valves 15, at this time, under the synergistic effect of pressure difference and gravity, the oil sample of the layer flows into the corresponding sample chamber 16 through the opened electric valve 15, and the collection of the oil sample of the layer is completed, after the sample collection of the first sampling layer is completed, the sampler continues to steadily lower, when lowering to other depth sampling layers, open the other two groups of electric valves 15 according to the same operation mode, and the oil samples of different depth layers will enter the corresponding sample chambers 16 respectively, so as to realize the stratified sampling operation of the oil of different depth layers;

[0033] During the whole lowering process of the sampler, the pump suction pipe 13 is deep into the pipeline with the sampler, if the sample needs to be obtained in time due to special circumstances, the operator connects the pump suction pipe 13 with the suction pump, the suction pump will start working immediately, and the oil sample in the sample chamber 16 is quickly pumped to the oil platform through the pump suction pipe 13, so as to realize rapid sampling.

[0034] It is obvious for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and can be realized in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-limiting, the scope of the present application is defined by the appended claims rather than the above description, therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application. Any reference signs in the claims should not be regarded as limiting the claims involved.

[0035] In addition, it should be understood that although the present application is described in the specification in terms of embodiments, not every embodiment contains only one independent technical solution, and the description manner of the specification is only for the sake of clarity, those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be properly combined to form other embodiments which can be understood by those skilled in the art.

Claims

1. A sampler for use in offshore oil production, characterised in that, The utility model relates to a kind of sampling mechanism, including stratified sampling assembly (1) and submergence assembly (2); Stratified sampling assembly (1) includes sampling cylinder (11), three layers of sample cavities (16) are provided in the sampling cylinder (11), three groups of electric valves (15) are installed on the outside of the sampling cylinder (11) respectively and communicate with three layers of sample cavities (16), and three groups of pump suction pipes (13) for sucking petroleum sample in sample cavity (16) are provided on the outside of the sampling cylinder (11); Submergence assembly (2) includes conical weight head (21), rotatable conical spiral blade (22) for reducing descent resistance is provided above the conical weight head (21), detachable limiting outer ring (24) is provided above the conical spiral blade (22), and a plurality of universal balls (25) for reducing friction with the inner wall of sampling pipeline are provided on the outside of the limiting outer ring (24). The electric valve (15) is installed downwardly inclined, and three groups of pump suction pipes (13) are respectively connected with the inside of three groups of sample cavities (16).

2. A sampler for use in offshore oil production as claimed in claim 1 wherein: Lifting ring (12) is installed above the sampling cylinder (11), and the diameter length of the upper and lower ends of the sampling cylinder (11) is less than the diameter length of the middle.

3. A sampler for use in offshore oil production as claimed in claim 2, characterised in that: Motor cylinder (28) is installed below the sampling cylinder (11), and the outer wall of the motor cylinder (28) is provided with threads, the motor cylinder (28) is connected with coil (27) outside threads, and the coil (27) is fixedly connected with limiting outer ring (24) by a plurality of connecting rods (26).

4. A sampler for use in offshore oil production as claimed in claim 3 wherein: Driving motor (29) is installed in the motor cylinder (28), transmission shaft (210) is provided below the motor cylinder (28), and the power shaft of the driving motor (29) is detachably connected with the transmission shaft (210).

5. A sampler for use in offshore oil production as claimed in claim 4 wherein: Conical block (23) is installed below the transmission shaft (210), and conical spiral blade (22) is installed outside the conical block (23), and conical weight head (21) is fixedly connected with the conical block (23).

6. A sampler for use in offshore oil production as claimed in claim 5 wherein: Sealing box (14) is installed on one side of the sampling cylinder (11), and controller is installed in the sealing box (14), and the controller is electrically connected with electric valve (15) and driving motor (29).

7. A sampler for use in offshore oil production as claimed in claim 6 wherein: ​

Images