Horizontal total mechanism convenient for scale removal and pressure test operation

Abstract

The utility model discloses a horizontal total mechanism convenient for scale removal and pressure test operation, belongs to the field of crude oil gathering and transportation, and relates to a total mechanism for a crude oil gathering and transportation process, which comprises a single-quantity gathering pipe, a well group oil incoming pipeline and a gathering and transportation gathering pipe, the single-quantity gathering pipe and the gathering and transportation gathering pipe are arranged in parallel, the single-quantity gathering pipe is connected with a plurality of pipelines from the main mechanism to the accident tank, and the single-quantity gathering pipe is connected with each pipeline from the main mechanism to the accident tank through a steel wedge gate valve; the well group incoming oil pipeline is connected with the steel wedge-type gate valve and is connected with the check valve through the steel wedge-type gate valve, the check valve is connected with the single-quantity gathering pipe through a main mechanism to accident tank pipeline, the check valve is connected with the steel wedge-type gate valve, and the steel wedge-type gate valve is connected with the gathering gathering pipe; according to the utility model, the problems of complicated flow switching process, low efficiency and high environmental protection risk in the daily oil pipeline scale removal and pressure test work are solved.

Description

Technical Field

[0001] The utility model belongs to the field of crude oil gathering and transportation, in particular to a main manifold of a crude oil gathering and transportation process, and specifically to a horizontal main manifold convenient for scale removal and pressure testing operations. Background Technique

[0002] In recent years, the situation of safety and environmental protection has been severe, and the supervision of the ecological environment has become more stringent. The daily management in the oil and gas production field has become more difficult. In order to reduce the oil transportation risk, operations such as scale removal and clean water pressure testing have become normal.

[0003] Search for the utility model patent of "A Ground Oil Gathering Main Manifold" with the patent number ZL201820316088.1, which includes a base, an oil gathering valve group, and a step platform. The oil gathering valve group and the step platform are both arranged on the base, and the base is arranged on the ground. The pipelines of the oil gathering valve group are fixedly arranged on the base through support members, and the step platform is movable; the pipelines of the oil gathering valve group include an oil inlet pipeline, a single - volume manifold, and a mixed - inlet manifold. There are multiple parallel oil inlet pipelines, the oil inlet pipeline and the mixed - inlet manifold are both horizontally arranged and perpendicular to each other. Multiple oil inlet pipelines are connected in parallel to the mixed - inlet manifold. A pressure - testing gate valve and a mixed - inlet gate valve are successively arranged on the oil inlet pipeline along the fluid flow direction. A pressure - testing monitoring valve and a digital pressure gauge are arranged at the inlet end of the oil inlet pipeline. The oil inlet pipeline and the single - volume manifold are connected through a pipeline perpendicular to the base, and a single - volume gate valve is arranged on this pipeline. Multiple oil inlet pipelines are connected in parallel to the single - volume manifold; however, when this patented technology performs scale removal operations and clean water pressure testing operations, during the process of switching the process, it is necessary to disassemble a tee pipeline, two valves, and a ball - blocking net, with large operation difficulty, cumbersome work process, large workload, low operation efficiency, and relatively high environmental protection risks.

[0004] Therefore, there is an urgent need for a horizontal main manifold convenient for scale removal and pressure testing operations, which can efficiently switch the process, enable the operation to be carried out safely and efficiently, and is used to solve the problems of complicated process switching procedures, low efficiency, and high environmental protection risks in the daily scale removal and pressure testing work of oil pipelines. Content of the Utility Model

[0005] The purpose of the utility model is to provide a horizontal main manifold convenient for scale removal and pressure testing operations, so as to overcome the deficiencies of the prior art that during the process of switching the process, it is necessary to disassemble a tee pipeline, two valves, and a ball - blocking net, with large operation difficulty, cumbersome work process, large workload, low operation efficiency, and relatively high environmental protection risks.

[0006] In order to achieve the above - mentioned purpose, the utility model provides the following technical solutions:

[0007] A horizontal main manifold convenient for scale removal and pressure testing operations includes a single - volume manifold, an oil pipeline coming from a well group, and a gathering and transportation manifold;

[0008] The single - volume manifold and the gathering and transportation manifold are arranged in parallel. A plurality of pipelines from the main manifold to the accident tank are connected to the single - volume manifold, and each single - volume manifold is connected to each pipeline from the main manifold to the accident tank through a steel wedge - type gate valve, which is used to prevent the backflow of the oil pipelines from other well groups in the main manifold due to the pressure drop caused by pipeline leakage during the daily oil - gathering production process, avoiding greater environmental pollution; The oil pipeline of the well group is connected to a steel wedge - type gate valve and is connected to a check valve through the steel wedge - type gate valve. By opening and closing the steel wedge - type gate valve, the liquid flow from the well group to the station process can be cut off or opened, and the process switching for scale removal or hydrostatic pressure test with clean water can be conveniently realized. The check valve is connected to the single - volume manifold through the pipeline from the main manifold to the accident tank, and the check valve is connected to the gathering and transportation manifold.

[0009] Further, the steel wedge - type gate valve at the left end of the single - volume manifold is connected to a pipeline from the main manifold to the accident tank, which is used for the emergency liquid inlet to the accident tank process. The right end of the single - volume manifold is connected to a steel wedge - type gate valve, and a purging control valve is connected to the steel wedge - type gate valve, which is used for the single - well single - volume and in - station pipeline purging process.

[0010] Further, a purging mechanism is arranged on one side of the gathering and transportation manifold, and a steel wedge - type gate valve is arranged on the other side, and the side connected to the pig - receiving device; The other side of the pig - receiving device is connected to the outlet of the main manifold provided with a steel wedge - type gate valve; A bypass pipeline is arranged between the gathering and transportation manifold and the outlet of the main manifold, and pig - receiving operation of the pipeline is carried out by using the bypass process.

[0011] Further, a chemical - adding pipeline is fixedly connected to the gathering and transportation manifold, and a chemical - adding device is connected to the chemical - adding pipeline, which is used for adding chemicals to the liquid gathered by the main manifold in the station to prevent the gathering and transportation pipeline from scaling and corrosion.

[0012] Further, an internal - thread gate valve is fixedly connected to the single - volume manifold, and a pressure gauge is installed on the internal - thread gate valve. Installing the pressure gauge is used to monitor the gathering and transportation pressure.

[0013] Further, flange covers are arranged at both ends of the single - volume manifold, and the flange covers are used for blind - plugging the single - volume manifold to facilitate the cleaning of the single - volume manifold.

[0014] Further, sampling valves are arranged on the oil pipelines of the well group.

[0015] Further, the check valve is connected to the single - volume manifold and the gathering and transportation manifold respectively through a tee.

[0016] Further, a steel wedge - type gate valve is connected to the single - volume manifold, and the steel wedge - type gate valve is connected to the pipeline from the main manifold to the single - volume meter.

[0017] Further, the single - volume manifold and the internal - thread gate valve are connected through a welded stub.

[0018] Compared with the prior art, the utility model has the following beneficial technical effects:

[0019] The utility model provides a horizontal master manifold that facilitates descaling and pressure testing operations. By installing a check valve and a steel wedge gate valve at the front end (oil inlet) of the master manifold, when connecting a cement truck at the well site for the clear water pressure testing operation of the oil outlet pipeline, by controlling the steel wedge gate valves of each well group pipeline, removing the check valve, and installing a flange cover on the corresponding steel wedge gate valve, it is possible to reduce the oil and gas overflow during the process of disassembling the tee for pressure relief in the master manifold process; when connecting a cement truck at the well site for the descaling operation of the oil outlet pipeline, by controlling the steel wedge gate valves of each well group pipeline, removing the check valve, connecting a tanker through a union to the corresponding steel wedge gate valve, and opening the steel wedge gate valve during the operation, the scale carried by the descaling ball in the oil outlet pipeline can be entered into the tanker; the utility model solves the problems that during the descaling operation and the clear water pressure testing operation, when switching the process, it is necessary to disassemble a tee pipeline, two valves, and a ball retaining net, with large operation difficulty, cumbersome work process, large workload, low operation efficiency, and relatively high environmental protection risk. It can quickly switch the process, simplify the work process, reduce the workload of employees, improve the work efficiency, and reduce the safety and environmental protection risk. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall horizontal master manifold that facilitates descaling and pressure testing operations in an embodiment of the utility model.

[0021] In the figure, 1, single volume manifold; 2, pipeline from the master manifold to the accident tank; 3, check valve; 4, steel wedge gate valve; 5, sampling valve; 6, oil pipeline from the well group; 7, chemical addition pipeline; 8, chemical addition device; 9, pipeline from the master manifold to the single volume meter; 10, outlet of the master manifold; 11, pig receiver; 12, gathering and transportation manifold; 13, purge control valve; 14, flange cover; 15, internal thread gate valve; 16, pressure gauge. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the utility model. Obviously, the described embodiments are only a 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 of ordinary skill in the art without creative efforts shall fall within the protection scope of the utility model.

[0023] It should be noted that the terms "first", "second", etc. in the description, claims and above-mentioned drawings of the present utility model are used to distinguish similar objects, and do not necessarily describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present utility model described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0024] The present utility model provides a horizontal main unit convenient for scale removal and pressure testing operations, which can solve the problems of complicated process switching, low efficiency and high environmental protection risk in the daily scale removal and pressure testing work of oil pipelines.

[0025] Refer to Figure 1 , a horizontal main unit convenient for scale removal and pressure testing operations, comprising a single-volume manifold 1, a well group incoming oil pipeline 6 and a gathering manifold 12;

[0026] The single-volume manifold 1 and the gathering manifold 12 are arranged in parallel. A plurality of main unit to accident tank pipelines 2 are connected to the single-volume manifold 1, and each main unit to accident tank pipeline 2 is connected to the single-volume manifold 1 through a steel wedge gate valve 4; the well group incoming oil pipeline 6 is connected to the steel wedge gate valve 4 and is connected to a check valve 3 through the steel wedge gate valve 4, which is used to prevent the reverse flow of the incoming oil pipelines 6 of other well groups of the main unit due to the pressure drop caused by pipeline leakage in the daily oil gathering production process, so as to avoid causing greater environmental pollution; the check valve 3 is connected to the main unit to accident tank pipeline 2 and is connected to the steel wedge gate valve 4 through the main unit to accident tank pipeline 2. The steel wedge gate valve 4 is connected to the single-volume manifold 1, the check valve 3 is flange-connected to the steel wedge gate valve 4 and the steel wedge gate valve 4 is flange-connected to the gathering manifold 12; and the single-volume manifold 1 is flange-connected to the steel wedge gate valve 4 for single-well single-volume and in-station pipeline flushing processes, and the steel wedge gate valve 4 is flange-connected to the main unit to accident tank pipeline 2.

[0027] The left end of the single - volume manifold 1 is connected to a steel wedge - type gate valve 4 and a main - line - to - accident - tank pipeline 2, which is used for emergencies in the station. By closing the steel wedge - type gate valve 4 of the gathering and transportation manifold 12 and opening the steel wedge - type gate valve 4 of the single - volume manifold 1 and the main - line - to - accident - tank pipeline 2, the incoming fluid from all well groups can be diverted through process switching. The right end of the single - volume manifold 1 is connected to a steel wedge - type gate valve 4, and a purging control valve 13 is connected to the steel wedge - type gate valve 4, which is used for single - well single - volume and in - station purging process. Close the steel wedge - type gate valve 4 of all the well - group incoming - oil pipelines 6 connected to the single - volume manifold 1, open the steel wedge - type gate valve 4 connected to the main - line - to - accident - tank pipeline 2, and connect the pipeline of the cement truck to the purging control valve 13 to scale - remove and purge the single - volume manifold 1. A purging mechanism is arranged on one side of the gathering and transportation manifold 12, and on the other side, there is a steel wedge - type gate valve 4 and it is connected to one side of the pig - receiving device 11. The other side of the pig - receiving device 11 is connected to the main - line outlet 10 with a steel wedge - type gate valve 4 arranged. A bypass pipeline is arranged between the gathering and transportation manifold 12 and the main - line outlet 10, and pipeline pig - receiving operation can be carried out by controlling the steel wedge - type gate valves on both sides. The gathering and transportation manifold 12 is also fixedly connected to a chemical - addition pipeline 7, and the chemical - addition pipeline 7 is connected to a chemical - addition device 8. The chemical - addition pipeline 7 is welded to the gathering and transportation manifold 12 and the chemical - addition device 8, which is used for adding chemicals to the incoming fluid gathered by the main - line in the station to prevent the gathering and transportation pipelines from scaling and corrosion.

[0028] An internal - thread gate valve 15 is connected to the single - volume manifold 1 through a welded stub, and a pressure gauge 16 is installed on the internal - thread gate valve 15. Installing the pressure gauge 16 is used to monitor the gathering and transportation pressure. Flange covers 14 are arranged at both ends of the single - volume manifold 1. The flange covers 14 are used for blind - plugging the single - volume manifold 1, which is convenient for cleaning during cleaning operations. Sampling valves 5 are arranged on all the well - group incoming - oil pipelines 6. The check valve 3 is connected to the single - volume manifold 1 and the gathering and transportation manifold 12 respectively through a tee, which is used for switching the process to conduct gathering or single - well - group fluid volume. The single - volume manifold 1 is connected to a steel wedge - type gate valve 4, and the steel wedge - type gate valve 4 is connected to the main - line - to - single - volume - meter pipeline 9, which is used for single - volume measurement. By closing the steel wedge - type gate valve 4 on the gathering and transportation manifold 12 and opening the steel wedge - type gate valve 4 connecting the single - volume manifold 1 and the main - line - to - single - volume - meter pipeline 9, the incoming fluid from all well groups can be diverted and the incoming fluid of the well groups can be metered through process switching.

[0029] The working process of this device:

[0030] During the clean water pressure test operation of connecting the cement truck to the oil pipeline at the well site, the well group oil pipeline 6 is connected to the steel wedge gate valve 4 through a flange, and the switch of the steel wedge gate valve 6 is used to open or cut off the well group liquid and the station process. By closing the steel wedge gate valve 4 connected to the well group oil pipeline 6, closing the steel wedge gate valve 4 connected to the single volume manifold 1, closing the steel wedge gate valve 4 connected to the flange of the gathering and transportation manifold 12, removing the single flow valve 3, and adding a blind plate to the steel wedge gate valve 4, the oil and gas overflow in the process of disassembling the three-way pressure relief in the main machine process can be reduced.

[0031] At the well site, a cement truck is connected to clean the oil pipeline. The well group oil pipeline 6 is connected to the steel wedge gate valve 4 through a flange. The switch of the steel wedge gate valve 4 is used to open or cut off the well group liquid and the station process. The steel wedge gate valve 4 connected to the well group oil pipeline 6 is closed, and the steel wedge gate valve 4 connected to the single volume manifold 1 is closed. The steel wedge gate valve 4 connected to the flange of the gathering and transportation manifold 12 is closed, and the single flow valve 3 is removed to reduce the oil and gas spillage in the process of disassembling the three-way pressure relief in the main flow. The steel wedge gate valve 4 is connected to the tank truck through a union. During the operation, the steel wedge gate valve 4 is opened to let the scale brought by the cleaning ball in the oil pipeline enter the tank truck.

[0032] The above description is only a preferred embodiment of the prior art type of fixing and installation of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A horizontal main switch for convenient cleaning and pressure testing, characterized in that: It comprises a single-volume manifold (1), a well group oil pipeline (6) and a gathering and transportation manifold (12); The single-volume manifold (1) and the gathering and transportation manifold (12) are arranged in parallel. The single-volume manifold (1) is connected to a plurality of main engine-to-accident tank pipelines (2), and the single-volume manifold (1) is connected to each main engine-to-accident tank pipeline (2) through a steel wedge gate valve (4); the well group oil pipeline (6) is connected to the steel wedge gate valve (4), and is connected to the check valve (3) through the steel wedge gate valve (4); the check valve (3) is connected to the single-volume manifold (1) through the main engine-to-accident tank pipeline (2), the check valve (3) is connected to the steel wedge gate valve (4), and the steel wedge gate valve (4) is connected to the gathering and transportation manifold (12).

2. A horizontal main switch for convenient cleaning and pressure testing according to claim 1, characterized in that: The left end of the single-volume manifold (1) is connected to a steel wedge-type gate valve (4) and a main engine to accident tank pipeline (2); the right end of the single-volume manifold (1) is connected to a steel wedge-type gate valve (4), and a purge control valve (13) is connected to the steel wedge-type gate valve (4).

3. A horizontal main switch for convenient cleaning and pressure testing according to claim 1, characterized in that: A purge mechanism is provided on one side of the gathering and transporting confluence pipe (12), and a steel wedge-type gate valve (4) is provided on the other side, and is connected to one side of a ball collecting device (11); the other side of the ball collecting device (11) is connected to a main machine outlet (10) provided with a steel wedge-type gate valve (4); a bypass pipeline is provided between the gathering and transporting confluence pipe (12) and the main machine outlet (10).

4. A horizontal main switch for convenient cleaning and pressure testing according to claim 3, characterized in that: The gathering and transporting conduit (12) is also fixedly connected to a dosing pipeline (7), and the dosing pipeline (7) is connected to a dosing device (8).

5. A horizontal main switch for convenient cleaning and pressure testing according to claim 2, characterized in that: An internally threaded gate valve (15) is fixedly connected to the single-volume manifold (1), and a pressure gauge (16) is installed on the internally threaded gate valve (15).

6. A horizontal main switch for convenient cleaning and pressure testing according to claim 1, characterized in that: Flange covers (14) are provided at both ends of the single-volume manifold (1).

7. A horizontal main switch for convenient cleaning and pressure testing according to claim 1, characterized in that: The oil pipelines (6) of the well groups are all provided with sampling valves (5).

8. A horizontal main switch for convenient cleaning and pressure testing according to claim 1, characterized in that: The check valve (3) is respectively connected to the single-volume manifold (1) and the gathering and transport manifold (12) through three-way connections.

9. A horizontal main switch for convenient cleaning and pressure testing according to claim 1, characterized in that: The single-meter manifold (1) is connected to a steel wedge-type gate valve (4), and the steel wedge-type gate valve (4) is connected from the main machine to the single-meter pipeline (9).

10. A horizontal main switch for convenient cleaning and pressure testing according to claim 5, characterized in that: The single-volume manifold (1) and the internally threaded gate valve (15) are short-circuited and connected by welding.

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