A fluid supply system for a cementing apparatus

Abstract

The utility model relates to oil and gas field cementing equipment technical field provides a kind of liquid supply system of cementing equipment, and cementing equipment includes metering tank, mortar mixing system and plunger pump, the liquid supply system includes circulating pump and perfusion pump, the import of the circulating pump is connected with the first outlet of the mortar mixing system by first circulating manifold, the export of the circulating pump is connected with the import of the mortar mixing system by second circulating manifold, the import of the perfusion pump is connected with the second outlet of the mortar mixing system by first perfusion manifold, the export of the perfusion pump is connected with the import of the plunger pump by second perfusion manifold, first connecting manifold is connected between the first circulating manifold and the first perfusion manifold, second connecting manifold is connected between the second circulating manifold and the second perfusion manifold, first control valve is equipped on the first connecting manifold, second control valve is equipped on the second connecting manifold.

Description

Technical Field

[0001] This utility model relates to the field of oil and gas field cementing equipment technology, specifically to a liquid supply system for cementing equipment. Background Technology

[0002] Traditional cementing equipment requires a separate supply pump in the slurry mixing system. If one pump fails, the entire system must be shut down for maintenance, disrupting normal cementing operations. While existing technologies allow the use of other supply pumps in the mixing system as backups, the interruption of a pump's primary function during a specific task can affect the continuity and reliability of cementing operations. Furthermore, the complex piping connections may compromise supply efficiency and effectiveness. Utility Model Content

[0003] The purpose of this utility model embodiment is to provide a liquid supply system for cementing equipment, so as to at least solve the technical problems existing in the prior art where, when the liquid supply pumps in the mixing system are used as backups for each other, only one function can be achieved, which affects the continuity and reliability of cementing operations, and the complex pipeline connection may affect the liquid supply efficiency and effect.

[0004] To address the aforementioned technical problems, embodiments of this utility model provide a liquid supply system for a cementing equipment. The cementing equipment includes a metering tank, a mixing system, and a plunger pump. The liquid supply system includes a circulation pump and an injection pump. The inlet of the circulation pump is connected to the first outlet of the mixing system via a first circulation manifold, and the outlet of the circulation pump is connected to the inlet of the mixing system via a second circulation manifold. The inlet of the injection pump is connected to the second outlet of the mixing system via a first injection manifold, and the outlet of the injection pump is connected to the inlet of the plunger pump via a second injection manifold. A first connecting manifold connects the first circulation manifold and the first injection manifold, and a second connecting manifold connects the second circulation manifold and the second injection manifold. A first control valve is provided on the first connecting manifold, and a second control valve is provided on the second connecting manifold.

[0005] In some embodiments, the liquid supply system further includes a water supply pump and a jet pump. The inlet of the water supply pump is connected to a first water supply manifold, and the outlet of the water supply pump is connected to the metering tank via a second water supply manifold. The inlet of the jet pump is connected to the outlet of the metering tank via a first jet manifold, and the outlet of the jet pump is connected to the inlet of the mixing system via a second jet manifold. A third connecting manifold is connected between the first water supply manifold and the first jet manifold, and a fourth connecting manifold is connected between the second water supply manifold and the second jet manifold. A third control valve is provided on the third connecting manifold, and a fourth control valve is provided on the fourth connecting manifold.

[0006] In some embodiments, the inlet of the jet pump is also connected to a third jet manifold.

[0007] In some embodiments, a fifth connecting manifold is further connected between the first injection manifold and the first connecting manifold.

[0008] In some embodiments, a third infusion manifold is also connected to the first infusion manifold.

[0009] In some embodiments, a first mass flow meter is provided on the second circulation manifold, and a second mass flow meter is provided on the second infusion manifold. The first mass flow meter is located downstream of the connection between the second circulation manifold and the second connecting manifold, and the second mass flow meter is located downstream of the connection between the second infusion manifold and the second connecting manifold.

[0010] In some embodiments, the second circulation manifold includes a plurality of circulation branches, and the first mass flow meter is disposed on at least one of the circulation branches.

[0011] In some embodiments, the first control valve includes a first sub-control valve and a second sub-control valve, wherein the first sub-control valve is located upstream of the connection between the first connecting manifold and the fifth connecting manifold, and the second sub-control valve is located downstream of the connection between the first connecting manifold and the fifth connecting manifold.

[0012] In some embodiments, each of the circulating branch pipes is provided with a fifth control valve, at least one of the plurality of fifth control valves being a pneumatic butterfly valve and at least another being a manual butterfly valve.

[0013] In some embodiments, the metering tank is equipped with a level gauge.

[0014] This utility model provides a liquid supply system for a cementing device. The cementing device includes a metering tank, a mixing system, and a plunger pump. The liquid supply system includes a circulation pump and an injection pump. The inlet of the circulation pump is connected to the first outlet of the mixing system via a first circulation manifold, and the outlet of the circulation pump is connected to the inlet of the mixing system via a second circulation manifold. The inlet of the injection pump is connected to the second outlet of the mixing system via a first injection manifold, and the outlet of the injection pump is connected to the inlet of the plunger pump via a second injection manifold. A first connection is provided between the first circulation manifold and the first injection manifold. The manifold includes a second connecting manifold connecting the second circulation manifold and the second injection manifold. The first connecting manifold is equipped with a first control valve, and the second connecting manifold is equipped with a second control valve. This allows the circulation pump and the injection pump to serve as backups for each other. The backup pump can be used to perform a single function (circulation or injection) or multiple functions (circulation and injection) simultaneously. This effectively reduces the impact of circulation pump or injection pump failure on cementing equipment operations, ensuring continuous and reliable operation of the cementing equipment. Furthermore, the manifold layout is simple and reasonable, and the fluid supply control is convenient and quick, enabling efficient fluid supply and reducing manifold layout costs. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a first structural schematic diagram of the liquid supply system of the cementing equipment according to an embodiment of the present utility model; Figure 2 This is a schematic diagram of the second structure of the liquid supply system of the cementing equipment according to an embodiment of the present utility model; Figure 3 This is a schematic diagram of the third structure of the liquid supply system of the cementing equipment according to an embodiment of the present utility model; Figure 4 This is a schematic diagram of the fourth structure of the liquid supply system of the cementing equipment according to an embodiment of the present utility model; Figure 5 This is a fifth structural schematic diagram of the liquid supply system of the cementing equipment according to an embodiment of the present utility model; Figure 6 This is a sixth structural schematic diagram of the liquid supply system of the cementing equipment according to an embodiment of the present utility model; Figure 7 This is a seventh structural schematic diagram of the liquid supply system of the cementing equipment according to an embodiment of the present utility model; Figure 8 This is the eighth structural schematic diagram of the liquid supply system of the cementing equipment according to an embodiment of the present utility model; Figure 9 This is a ninth structural schematic diagram of the liquid supply system of the cementing equipment according to an embodiment of the present utility model; Figure 10 This is a tenth structural schematic diagram of the liquid supply system of the cementing equipment according to an embodiment of the present utility model; Figure 11 This is the eleventh structural schematic diagram of the liquid supply system of the cementing equipment according to an embodiment of the present utility model; Figure 12 This is a schematic diagram of the twelfth structure of the liquid supply system of the cementing equipment according to an embodiment of the present utility model; Figure 13 This is a thirteenth structural schematic diagram of the liquid supply system of the cementing equipment according to an embodiment of the present utility model; Figure 14 This is a control logic diagram of the fluid supply system of the cementing equipment according to an embodiment of the present invention.

[0017] Figure label: 1-Circulation pump, 11-First circulation manifold, 12-Second circulation manifold, 121-Circulation branch pipe, 2-Injection pump, 21-First injection manifold, 22-Second injection manifold, 23-Third injection manifold, 31-First connecting manifold, 32-Second connecting manifold, 33-Third connecting manifold, 34-Fourth connecting manifold, 35-Fifth connecting manifold, 41-First control valve, 411-First sub-control valve, 412-Second sub-control valve, 42-Second control valve, 43 - Third control valve, 44- Fourth control valve, 451- Pneumatic butterfly valve, 452- Manual butterfly valve, 5- Water supply pump, 51- First water supply manifold, 52- Second water supply manifold, 6- Jet pump, 61- First jet manifold, 62- Second jet manifold, 63- Third jet manifold, 71- First mass flow meter, 72- Second mass flow meter; 10- Metering tank, 20- Mixing system, 201- Mixing tank, 202- Mixer, 203- Agitator, 30- Plunger pump. Detailed Implementation

[0018] Various embodiments and features of this utility model are described herein with reference to the accompanying drawings.

[0019] It should be understood that various modifications can be made to the embodiments described herein. Therefore, the above description should not be considered as limiting, but merely as an example of embodiments. Other modifications within the scope and spirit of this invention will be apparent to those skilled in the art.

[0020] Included in and constitutes the instruction manual The accompanying drawings, in part, illustrate embodiments of the present invention and, together with the general description of the present invention given above and the detailed description of the embodiments given below, serve to explain the principles of the present invention.

[0021] These and other features of the present invention will become apparent from the following description of preferred forms of embodiments given as non-limiting examples, with reference to the accompanying drawings.

[0022] It should also be understood that, although it has been referred to as one Some specific examples have been described to illustrate the present invention, but those skilled in the art will be able to determine many other equivalent forms of the present invention that have the features as described in the claims and are therefore all within the scope of protection defined herein.

[0023] The above and other aspects, features and advantages of the present invention will become more apparent when taken in conjunction with the accompanying drawings and in view of the following detailed description.

[0024] Specific embodiments of the present invention will now be described with reference to the accompanying drawings; however, it should be understood that the claimed embodiments are merely examples of the present invention, which may be implemented in various ways. Well-known and / or repeated functions and structures have not been described in detail to avoid unnecessary or redundant details that could obscure the present invention. Therefore, the specific structural and functional details claimed herein are not intended to be limiting, but merely to serve as the basis and representative basis for the claims to teach those skilled in the art to use the present invention in a variety of substantially any suitable detailed structures.

[0025] This specification may use the phrases “in one embodiment,” “in another embodiment,” “in yet another embodiment,” or “in other embodiments,” all of which may refer to one or more of the same or different embodiments according to the present invention.

[0026] Figures 1 to 13 A schematic diagram of the fluid supply system of the cementing equipment according to an embodiment of the present invention is shown. Figure 14 A control logic diagram of the fluid supply system of the cementing equipment according to an embodiment of this utility model is shown. Figures 1 to 14As shown in the figure, an embodiment of the present invention provides a liquid supply system for a cementing equipment. The cementing equipment includes a metering tank 10, a mixing system 20, and a plunger pump 30. The liquid supply system includes a circulation pump 1 and an injection pump 2. The inlet of the circulation pump 1 is connected to the first outlet of the mixing system 20 through a first circulation manifold 11, and the outlet of the circulation pump 1 is connected to the inlet of the mixing system 20 through a second circulation manifold 12. The inlet of the injection pump 2 is connected to the second outlet of the mixing system 20 through a first injection manifold 21, and the outlet of the injection pump 2 is connected to the inlet of the plunger pump 30 through a second injection manifold 22. A first connecting manifold 31 is connected between the first circulation manifold 11 and the first injection manifold 21, and a second connecting manifold 32 is connected between the second circulation manifold 12 and the second injection manifold 22. A first control valve 41 is provided on the first connecting manifold 31, and a second control valve 42 is provided on the second connecting manifold 32.

[0027] like Figure 2 As shown, the circulating pump 1 forms a circulation loop with the mixing system 20 through the first circulation manifold 11 and the second circulation manifold 12. It is mainly used for the circulation of cement slurry during the mixing process. The circulating pump 1 can return the cement slurry after mixing in the mixing system 20 to the mixing system 20 through the circulation manifold.

[0028] like Figure 1 , Figure 9 and Figure 14 As shown, the slurry mixing system 20 includes a slurry mixing tank 201, a mixer 202, and an agitator 203. The mixer 202 is used for premixing the cement slurry. The inlet of the mixer 202 is connected to the outlet of the metering tank 10, which supplies water to the mixer 202. A water valve is installed on the water supply manifold connecting the metering tank 10 and the inlet of the mixer 202. The inlet of the mixer 202 is also connected to an ash supply manifold, which is equipped with an ash valve. After the clean water and dry ash are initially mixed in the mixer 202, they are sent into the slurry mixing tank 201 for slurry mixing. The mixer 202 can be installed on the slurry mixing tank 201, for example, on the top side of the slurry mixing tank 201, to facilitate the use of gravity to transport the premixed cement slurry in the mixer 202 into the slurry mixing tank 201. The agitator 203 is installed in the slurry mixing tank 201 to mix the cement slurry evenly. The mixer 202 is preferably a high-energy mixer. The circulating pump 1 returns the cement slurry after mixing in the mixing tank 201 to the mixer 202 through the circulating manifold, and then back to the mixing tank 201, thus realizing the circulation of cement slurry.

[0029] like Figure 3 As shown, the injection pump 2 and injection manifold are mainly used to inject the mixed cement slurry into the plunger pump 30. The injection pump 2 draws cement slurry from the mixing system 20 and injects it into the plunger pump 30.

[0030] The plunger pump 30 can be like Figure 1 The image shown can be one, or it can be multiple. For example, as shown... Figures 2 to 13 As shown, two plunger pumps 30 can be installed, including a first plunger pump (D-side plunger pump) and a second plunger pump (P-side plunger pump), respectively installed on the driver and auxiliary sides of the electric cementing truck to meet different operational needs. The metering tank 10 can be equipped with multiple metering chambers (e.g., chamber D and chamber P) to meet liquid supply and storage requirements. The two metering chambers can be connected to the two plunger pumps 30 respectively, allowing the liquid in the two metering chambers to flow to either plunger pump, satisfying the liquid supply needs of different plunger pumps.

[0031] When the cementing equipment is working normally, the circulation pump 1 undertakes the secondary circulation function of the mud in the mixing system 20, and the injection pump 2 undertakes the cement slurry injection work from the mixing system 20 to the plunger pump 30.

[0032] like Figure 4 As shown, when the grouting pump 2 malfunctions, the first control valve 41 on the first connecting manifold 31 opens, and the second control valve 42 on the second connecting manifold 32 opens. The cement slurry flowing out from the second outlet of the grouting system 20 enters the circulation pump 1 after passing through a part of the first grouting manifold 21, the first connecting manifold 31, and the first circulation manifold 11. The cement slurry flowing out from the circulation pump 1 enters the plunger pump 30 after passing through a part of the second circulation manifold 12, the second connecting manifold 32, and the second grouting manifold 22, thus realizing the grouting function of the circulation pump 1.

[0033] like Figure 5 As shown, when the circulating pump 1 malfunctions, the first control valve 41 on the first connecting manifold 31 opens, and the second control valve 42 on the second connecting manifold 32 opens. Cement slurry flowing from the first outlet of the mixing system 20 can enter the grouting pump 2 via the first circulating manifold 11, the first connecting manifold 31, and the first grouting manifold 21. Cement slurry flowing from the outlet of the grouting pump 2 enters the inlet of the mixing system 20 via the second grouting manifold 22, the second connecting manifold 32, and the second circulating manifold 12, thus realizing the circulation function of the grouting pump 2. Figure 6 As shown, when the circulating pump 1 simultaneously circulates and injects cement slurry, the first control valve 41 on the first connecting manifold 31 is opened, the second control valve 42 on the second connecting manifold 32 is opened, and the control valve V16 on the first circulating manifold 11 is closed. The cement slurry in the mixing system 20 flows out from the second outlet and then enters the circulating pump 1 through the first injection manifold 21, the first connecting manifold 31, and the first circulating manifold 11. The circulating pump 1 delivers a portion of the cement slurry to the inlet of the mixing system 20 through the second circulating manifold 12 and delivers the other portion of the cement slurry to the plunger pump 30 through the second connecting manifold 32 and the second injection manifold 22.

[0034] like Figure 7 As shown, when the injection pump 2 performs cement slurry injection and circulation simultaneously, the cement slurry in the mixing system 20 flows out from the second outlet and is then transported to the injection pump 2 via the first injection manifold 21. The injection pump 2 transports a portion of the cement slurry through a section of the second injection manifold 22, the second connecting manifold 32, and the second circulation manifold 12 to the inlet of the mixing system 20, and injects another portion of the cement slurry into the plunger pump 30 through the second injection manifold 22.

[0035] Understandably, in some operating conditions, since the plunger pump 30 needs to be injected with clean water, when the circulating pump 1 is simultaneously circulating and injecting cement slurry, or when the injection pump 2 is simultaneously injecting and circulating cement slurry, the cement slurry flows out from the second outlet of the mixing system 20 so that external clean water can be pumped to the plunger pump 30 through the injection manifold 3.

[0036] As can be seen from the above, when both the circulation pump 1 and the injection pump 2 are working normally, the first control valve 41 on the first connecting manifold 31 is closed, and the second control valve 42 on the second connecting manifold 32 is closed. When either the circulation pump 1 or the injection pump 2 malfunctions, the first control valve 41 on the first connecting manifold 31 and the second control valve 42 on the second connecting manifold 32 are opened, allowing the other pump to handle both cement slurry circulation and injection, thus enabling the circulation pump 1 and the injection pump 2 to serve as backups for each other.

[0037] In this embodiment, only a first connecting manifold 31 needs to be installed between the inlet manifold of the circulation pump 1 and the inlet manifold of the injection pump 2, and a second connecting manifold 32 needs to be installed between the outlet manifold of the circulation pump 1 and the outlet manifold of the injection pump 2. Corresponding control valves are installed on the first connecting manifold 31 and the second connecting manifold 32. This allows the circulation pump 1 and the injection pump 2 to serve as backups for each other. The injection pump 2 can simultaneously have the function of the circulation pump 1, and the circulation pump 1 can simultaneously have the function of the injection pump 2. At the same time, only one mud pump can be used to undertake both cement slurry circulation and injection work, ensuring continuous and reliable operation of the cementing operation.

[0038] The cementing equipment fluid supply system provided in this embodiment of the utility model comprises a cementing equipment including a metering tank 10, a mixing system 20, and a plunger pump 30. The fluid supply system includes a circulation pump 1 (C3) and an injection pump 2 (C4). The inlet of the circulation pump 1 is connected to the first outlet of the mixing system 20 through a first circulation manifold 11, and the outlet of the circulation pump 1 is connected to the inlet of the mixing system 20 through a second circulation manifold 12. The inlet of the injection pump 2 is connected to the second outlet of the mixing system 20 through a first injection manifold 21, and the outlet of the injection pump 2 is connected to the inlet of the plunger pump 30 through a second injection manifold 22. The first circulation manifold 11 and the first injection manifold 21 are connected to each other. A first connecting manifold 31 connects the second circulation manifold 12 and the second injection manifold 22. A second connecting manifold 32 connects the second circulation manifold 12 and the second injection manifold 22. The first connecting manifold 31 is equipped with a first control valve 41, and the second connecting manifold 32 is equipped with a second control valve 42. This allows the circulation pump 1 and the injection pump 2 to serve as backups for each other. The backup pump can be used to achieve a single function (circulation or injection) or multiple functions (circulation and injection) simultaneously. This effectively reduces the impact of failure of the circulation pump 1 or the injection pump 2 on the cementing equipment operation, ensuring the continuous and reliable operation of the cementing equipment. Furthermore, the manifold layout is simple and reasonable, and the fluid supply control is convenient and quick, enabling efficient fluid supply and reducing the cost of manifold layout.

[0039] In some embodiments, such as Figure 3 As shown, a third injection manifold 23 is also connected to the first injection manifold 21.

[0040] Liquid (e.g., clean water) from an external water storage device can be drawn into the injection pump 2 through the third injection manifold 23, and then injected into the plunger pump 30.

[0041] In some embodiments, the liquid supply system further includes a water supply pump 5 (C1) and a jet pump 6 (C2). The inlet of the water supply pump 5 is connected to a first water supply manifold 51, and the outlet of the water supply pump 5 is connected to the metering tank 10 through a second water supply manifold 52. The inlet of the jet pump 6 is connected to the outlet of the metering tank 10 through a first jet manifold 61, and the outlet of the jet pump 6 is connected to the inlet of the mixing tank 20 through a second jet manifold 62. A third connecting manifold 33 is connected between the first water supply manifold 51 and the first jet manifold 61, and a fourth connecting manifold 34 is connected between the second water supply manifold 52 and the second jet manifold 62. A third control valve 43 is provided on the third connecting manifold 33, and a fourth control valve 44 is provided on the fourth connecting manifold 34.

[0042] Specifically, such as Figure 8As shown, the first water supply manifold 51 is connected between the inlet of the metering tank 10 and the water storage device (not shown in the figure). The water supply pump 5 and the water supply manifold are mainly used to supply water to the metering tank 10. The water supply pump 5 can transport clean water in the external water storage device to the metering tank 10 through the water supply manifold.

[0043] like Figure 9 As shown, the jet pump 6 and the jet manifold are mainly used to provide high-pressure clean water to the mixing system 20. The jet pump 6 can draw clean water from the metering tank 10 through the first jet manifold 61 and deliver it to the mixing system 20 through the second jet manifold 62.

[0044] When the cementing equipment is operating normally, water pump 5 supplies water to metering tank 10, and jet pump 6 supplies water to mixing system 20. At this time, the third control valve 43 on the third connecting manifold 33 is closed, and the fourth control valve 44 on the fourth connecting manifold 34 is closed.

[0045] like Figure 10 As shown, when the jet pump 3 malfunctions, the third control valve 43 on the third connecting manifold 33 opens, and the fourth control valve 44 on the fourth connecting manifold 34 opens. Clean water in the metering tank can be transported to the water supply pump 5 via the first jet manifold 61 and the third connecting manifold 33. The water supply pump 5 then transports clean water to the mixing system 20 via a section of the second water supply manifold 52, the fourth connecting manifold 34, and the second jet manifold, thus realizing the jetting function of the water supply pump 5. Simultaneously, the water supply pump 5 can also draw clean water from the outside through the first water supply manifold 51, and then transport it to the mixing system 20 via a section of the second water supply manifold 52, the fourth connecting manifold 34, and the second jet manifold, similarly realizing the jetting function of the water supply pump 5. The water supply pump 5 can both supply water to the metering tank 10 and draw water from the metering tank 10 to supply water to the mixing system 20, ensuring a reliable water supply to both the metering tank 10 and the mixing system 20.

[0046] like Figure 11 As shown, when the water supply pump 5 fails, the third control valve 43 on the third connecting manifold 33 opens, and the fourth control valve 44 on the fourth connecting manifold 34 opens. The jet pump 6 can draw clean water from the outside through a part of the first water supply manifold 51, the third connecting manifold 33 and a part of the first jet manifold 51, and then deliver it to the metering tank 10 through a part of the second jet manifold 52, the fourth connecting manifold 34 and a part of the second water supply manifold 52, thus realizing the water supply function of the jet pump 6.

[0047] In some embodiments, the inlet of the jet pump 6 is also connected to a third jet manifold 63. The jet pump 6 can draw clean water from an external water storage device and deliver it to the mixing system 20 through the second jet manifold 62.

[0048] like Figure 9 As shown, when the jet pump 6 is working normally, it can draw clean water from the outside to supply liquid to the mixing tank 20. Figure 11 As shown, when the water supply pump 5 fails, due to the long length of the first water supply manifold 51, the third connecting manifold 33, and the first jet manifold 61, the jet pump 6 drawing clean water from the first water supply manifold 51 may affect the pumping effect. In this case, the third control valve 43 can be closed, allowing external clean water to be drawn in through the third jet manifold 63 and delivered to the metering tank 10 through the second jet manifold 62, the fourth connecting manifold, and the second water supply manifold 51, thus supplying water to the metering tank 10. As can be seen from the above, by setting the third connecting manifold 33 and the fourth connecting manifold 34, and installing corresponding control valves on the third connecting manifold 33 and the fourth connecting manifold 34, this utility model can achieve mutual backup for the water supply pump 5 and the jet pump 6. The water supply pump 5 can simultaneously function as the jet pump 6, and the jet pump 6 can simultaneously function as the water supply pump 5.

[0049] In practice, the operating status of each liquid supply pump (including water supply pump 5 and jet pump 6) can be detected by sensors installed on each pump, and corresponding control can be implemented based on the operating status. For example, if jet pump 6 is detected idling while supplying water to the mixing system 20, it indicates a possible malfunction. Jet pump 6 stops operating, and the third and fourth connecting manifolds 33 and 34 are connected, allowing water supply pump 5 to supply water to the mixing system 20, ensuring its normal operation. During the operation of the mixing system 20, maintenance personnel can repair jet pump 6. After repair, the connection between the third and fourth connecting manifolds 33 and 34 is broken, and jet pump 6 resumes operation to supply water to the mixing system 20. In other words, the backup liquid supply pump is typically used in emergencies. When the original liquid supply pump returns to normal operation, it is used as the main working pump to deliver liquid.

[0050] It is understandable that water supply pump 5 and jet pump 6 are clean water pumps. When water supply pump 5 or jet pump 6 fails, external liquid supply pumps can be used to ensure reliable operation of cementing operations. Circulation pump 1 and injection pump 2 are mud pumps and cannot be supplied in a timely manner. Therefore, in specific implementation, circulation pump 1 and injection pump 2 are prioritized to be mutually redundant through manifold arrangement. Water supply pump 5 and jet pump 6 can be mutually redundant or not.

[0051] In some embodiments, a fifth connecting manifold 35 is further connected between the first injection manifold 61 and the first connecting manifold 32.

[0052] During cementing operations, after cement slurry is injected into the casing at the wellhead, displacement fluid is needed to replace the cement slurry in the annulus between the casing and the wellbore. In existing technology, a connecting manifold and valves are usually installed between the plunger pump 30 and the metering tank 10, allowing the plunger pump 30 to directly draw displacement fluid from the metering tank 10 and inject it into the casing. However, due to the weak self-priming capability of the plunger pump 30, the displacement operation is ineffective and inefficient.

[0053] like Figure 12 As shown, in this embodiment, a fifth connecting manifold 35 is also connected between the first injection manifold 61 and the first connecting manifold 32. The circulating pump 1 can draw displacement liquid from the metering tank 10 and deliver the displacement liquid to the plunger pump 30, thereby improving the displacement efficiency and displacement quality.

[0054] Similarly, such as Figure 13 As shown, in this embodiment, a fifth connecting manifold 35 is also connected between the first injection manifold 61 and the first injection manifold 21. The injection pump 2 can draw displacement liquid from the metering tank 10 and deliver the displacement liquid to the plunger pump 30, thereby improving the displacement efficiency and displacement quality.

[0055] In some embodiments, the second circulation manifold 12 is provided with a first mass flow meter 71, and the second infusion manifold 22 is provided with a second mass flow meter 72. The first mass flow meter 71 is located downstream of the connection between the second circulation manifold 12 and the second connecting manifold 32, and the second mass flow meter 72 is located downstream of the connection between the second infusion manifold 22 and the second connecting manifold 32.

[0056] The first mass flow meter 71 is used to detect the density and mass of cement slurry in the circulation manifold; the second mass flow meter 72 is used to detect the density and mass of cement slurry in the injection manifold. The detection result of the second mass flow meter 72 can be fed back to the mixing system 20 to control the water valve and ash valve of the mixing system 20 to perform corresponding actions, adjusting the cement slurry in the mixing system 20 to a suitable cement slurry density value.

[0057] The second mass flow meter 72 can also measure the flow velocity in the injection manifold, and then control the rotation speed of the injection pump 2 based on the measured flow velocity to ensure the stability of density measurement using the second mass flow meter 72.

[0058] In some embodiments, the second circulation manifold 12 includes a plurality of circulation branches 121, allowing cement slurry to flow into the mixing system 20 for circulation through the multiple circulation branches 121. A first mass flow meter 71 is installed on at least one of the circulation branches 121. For example, in this embodiment, two circulation branches 121 are provided, one of which is equipped with a first mass flow meter 71 for monitoring the density and flow rate of the slurry within the circulation manifold.

[0059] In some embodiments, the first control valve 41 includes a first sub-control valve 411 and a second sub-control valve 412. The first sub-control valve 411 is located upstream of the connection between the first connecting manifold 31 and the fifth connecting manifold 35, and the second sub-control valve 412 is located downstream of the connection between the first connecting manifold 31 and the fifth connecting manifold 35.

[0060] like Figure 12 and Figure 13 As shown, by setting the first sub-control valve 411 and the second sub-control valve 412, the manifolds that are fed into the plunger pump 30 by the circulation pump 1 and the injection pump 2 can be precisely controlled.

[0061] In some embodiments, each of the circulating branch pipes 121 is provided with a fifth control valve, at least one of the plurality of fifth control valves being a pneumatic butterfly valve 451 and at least another being a manual butterfly valve 452.

[0062] The first control valve 41, the second control valve 42, the third control valve 43, and the fourth control valve 44 mentioned above are preferably pneumatic butterfly valves. Using different butterfly valves for the control valves installed on the circulation branch pipe 121 allows for both automatic and manual control, facilitating emergency braking, etc.

[0063] In some embodiments, the metering tank 10 is provided with a level gauge, and the controller is configured to control the rotation speed of the water supply pump 5 and / or the jet pump 6 based on the level information detected by the level gauge.

[0064] In practice, the speed of the jet pump 6 and the water supply pump 5 can be adjusted according to the liquid level in the metering tank 10. When the liquid level is high, the speed is reduced to reduce the water intake; when the liquid level is low, the speed is increased to increase the water intake, so that the liquid level in the metering tank 10 is kept at a reasonable value, so that the metering tank 10 does not overflow or become empty.

[0065] The control of circulating pump 1, priming pump 2, water supply pump 5, jet pump 6, and plunger pump 30 can be either variable frequency control or power frequency control. For example... Figure 14 As shown, the circulating pump 1, priming pump 2, water supply pump 5, jet pump 6, and plunger pump 30 can all be driven by motors. The controller is connected to the frequency converter, the frequency converter is connected to the motor, and the motor is connected to the corresponding pump to realize the frequency conversion control of the pump.

[0066] For example, when the circulating pump 1 and / or the injection pump 2 are controlled by frequency conversion, the rotation speed of the circulating pump 1 and / or the injection pump 2 can be controlled according to the displacement of the plunger pump 30, so as to achieve the purpose of controlling the circulating pump 1 and / or the injection pump 2 according to the displacement required by the plunger pump 30.

[0067] When using frequency conversion control, the speeds of the jet pump 6 and the water supply pump 5 can be adjusted according to the different water requirements in the mixing tank 201, thereby cooperating with the water valve to achieve precise control of the water requirements for mixing.

[0068] It is understood that in this embodiment, a first connecting manifold 31 connects the first circulation manifold 11 to the first injection manifold 21, and a second connecting manifold 32 connects the second circulation manifold 12 to the second injection manifold 22; a third connecting manifold 33 connects the first water supply manifold 51 to the first jet manifold 61, and a fourth connecting manifold 34 connects the second water supply manifold 52 to the second jet manifold 62. The circulation pump 1, injection pump 2, water supply pump 5, and jet pump 6 can each have only one pump inlet and one pump outlet, thus reducing the number of manifolds (different manifolds can share pipe sections) and lowering the cost of manifold layout. In specific implementations, the circulation pump 1, injection pump 2, water supply pump 5, and jet pump 6 can also have multiple pump inlets and outlets, and the first connecting manifold 31, second connecting manifold 32, third connecting manifold 33, and fourth connecting manifold 34 can also be directly connected to their respective pump inlets and outlets, enabling different pumps to serve as backups for each other.

[0069] The above description is merely a preferred embodiment of this utility model and an explanation of the techniques used. Those skilled in the art should understand that the scope of disclosure in this utility model is not limited to the specific combination of the above-described technical features, but should also cover other technical solutions formed by any combination of the above-described technical features or their equivalents without departing from the above-described concept. For example, technical solutions formed by substituting the above-described features with (but not limited to) technical features with similar functions disclosed in this utility model.

[0070] Furthermore, although the operations are described in a specific order, this should not be construed as requiring these operations to be performed in the specific order shown or in a sequential order. Multitasking and parallel processing may be advantageous in certain environments. Similarly, while several specific implementation details are included in the above discussion, these should not be construed as limiting the scope of this invention. Certain features described in the context of individual embodiments may also be implemented in combination in a single embodiment. Conversely, various features described in the context of a single embodiment may also be implemented individually or in any suitable sub-combination in multiple embodiments.

[0071] Although the subject matter has been described using language specific to structural features and / or methodological logic, it should be understood that the subject matter defined in the appended claims is not necessarily limited to the specific features or actions described above. Rather, the specific features and actions described above are merely illustrative examples of implementing the claims.

Claims

1. A liquid supply system for cementing equipment, characterized in that, The cementing equipment includes a metering tank, a mixing system, and a plunger pump. The fluid supply system includes a circulation pump and an injection pump. The inlet of the circulation pump is connected to the first outlet of the mixing system through a first circulation manifold, and the outlet of the circulation pump is connected to the inlet of the mixing system through a second circulation manifold. The inlet of the injection pump is connected to the second outlet of the mixing system through a first injection manifold, and the outlet of the injection pump is connected to the inlet of the plunger pump through a second injection manifold. A first connecting manifold connects the first circulation manifold and the first injection manifold, and a second connecting manifold connects the second circulation manifold and the second injection manifold. A first control valve is provided on the first connecting manifold, and a second control valve is provided on the second connecting manifold.

2. The liquid supply system of the cementing equipment according to claim 1, characterized in that, The liquid supply system also includes a water supply pump and a jet pump. The inlet of the water supply pump is connected to a first water supply manifold, and the outlet of the water supply pump is connected to the metering tank through a second water supply manifold. The inlet of the jet pump is connected to the outlet of the metering tank through a first jet manifold, and the outlet of the jet pump is connected to the inlet of the mixing system through a second jet manifold. A third connecting manifold is connected between the first water supply manifold and the first jet manifold, and a fourth connecting manifold is connected between the second water supply manifold and the second jet manifold. A third control valve is provided on the third connecting manifold, and a fourth control valve is provided on the fourth connecting manifold.

3. The fluid supply system of the cementing equipment according to claim 2, characterized in that, The inlet of the jet pump is also connected to a third jet manifold.

4. The liquid supply system of the cementing equipment according to claim 2, characterized in that, A fifth connecting manifold is also connected between the first injection manifold and the first connecting manifold.

5. The fluid supply system for the cementing equipment according to claim 1, characterized in that, A third injection manifold is also connected to the first injection manifold.

6. The fluid supply system of the cementing equipment according to claim 1, characterized in that, The second circulation manifold is equipped with a first mass flow meter, and the second injection manifold is equipped with a second mass flow meter. The first mass flow meter is located downstream of the connection between the second circulation manifold and the second connecting manifold, and the second mass flow meter is located downstream of the connection between the second injection manifold and the second connecting manifold.

7. The fluid supply system for the cementing equipment according to claim 6, characterized in that, The second circulation manifold includes multiple circulation branches, and the first mass flow meter is installed on at least one of the circulation branches.

8. The fluid supply system of the cementing equipment according to claim 4, characterized in that, The first control valve includes a first sub-control valve and a second sub-control valve. The first sub-control valve is located upstream of the connection between the first connecting manifold and the fifth connecting manifold, and the second sub-control valve is located downstream of the connection between the first connecting manifold and the fifth connecting manifold.

9. The fluid supply system of the cementing equipment according to claim 7, characterized in that, Each of the circulating branch pipes is provided with a fifth control valve, at least one of the plurality of fifth control valves being a pneumatic butterfly valve and at least another being a manual butterfly valve.

10. The fluid supply system of the cementing equipment according to claim 2, characterized in that, The metering tank is equipped with a level gauge.

Images