CN211287581U - Two-stage pressurizing system for drilling mud - Google Patents
Two-stage pressurizing system for drilling mud Download PDFInfo
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- CN211287581U CN211287581U CN201922332651.1U CN201922332651U CN211287581U CN 211287581 U CN211287581 U CN 211287581U CN 201922332651 U CN201922332651 U CN 201922332651U CN 211287581 U CN211287581 U CN 211287581U
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Abstract
The utility model discloses a drilling mud two-stage supercharging system, which comprises a centrifugal pump and a piston pump which are connected through a pipeline, wherein the outlet end of the piston pump is connected with the inlet of a high-pressure liquid inlet manifold assembly through a pipeline, and the outlet of the high-pressure liquid inlet manifold assembly is connected with the hydraulic end of a plunger pump; the utility model discloses realize under the prerequisite of not upgrading current 20MPa drilling mud piston pump turbocharging system, use the piston pump to promote drilling mud pressure to 35 MPa's purpose with the drilling mud pressure boost of reusing second grade turbocharging system behind 20MPa to through technology pipeline design, realize the function that one-level turbocharging system or second grade turbocharging system switch.
Description
Technical Field
The utility model relates to a drilling mud pressure boost technical field specifically indicates a drilling mud second grade turbocharging system.
Background
In recent years, the shortage of conventional energy sources has become a bottleneck restricting economic development, and newly increased oil and gas fields are developed from regions with higher difficulty in exploiting deep sea, shale gas and the like. The new drilling machines and new drilling technologies are in the endlessly, and higher requirements are also put on the discharge capacity and pressure of drilling mud.
The drilling mud supercharging system equipped by the conventional drilling machine at present mainly performs primary supercharging on the drilling mud through 1-3 piston pumps, and the drilling mud can only be supercharged to about 20MPa due to the performance limitation of the piston pumps, so that the requirement of a novel drilling machine and a novel drilling process on the pressure of 35MPa of cement slurry cannot be met.
If a novel drilling machine or a novel drilling process is needed, the existing 1-3 piston pumps are required to be integrally replaced by models with better performance, and the equipment upgrading cost is high and is not beneficial to implementation. In addition, the suction pressure of a conventional plunger pump or a conventional piston pump is low, so a low-pressure manifold is generally arranged on a liquid inlet manifold of the conventional plunger pump or the conventional piston pump, but the liquid inlet manifold of the secondary booster pump needs to bear higher liquid inlet pressure (more than 20 MPa), and the common low-pressure liquid inlet manifold cannot meet the requirement.
Disclosure of Invention
An object of the utility model is to overcome the aforesaid not enough, provide a drilling mud second grade turbocharging system to realize under the prerequisite of not upgrading current 20MPa drilling mud piston pump turbocharging system, use the piston pump to promote drilling mud pressure to 35 MPa's purpose with the second grade turbocharging system of reusing behind drilling mud pressure boost to 20MPa, and through the process piping design, realize the function that one-level turbocharging system or second grade turbocharging system switched.
The utility model discloses a solve above-mentioned technical problem, the technical scheme who adopts is: the utility model provides a drilling mud second grade turbocharging system, includes centrifugal pump and piston pump through the tube coupling, the piston pump exit end passes through pipeline and high-pressure inlet manifold assembly access connection, and high-pressure inlet manifold assembly exports and plunger pump hydraulic end connection.
Preferably, the inlet end of the centrifugal pump is connected with the outlet of the slurry pool through a pipeline, and a combined valve is further arranged on the pipeline where the outlet end of the piston pump is located.
Preferably, the pipeline where the outlet end of the combined valve is located is divided into two branches, one branch is sequentially provided with a first shutoff valve and a first one-way valve, the other branch is sequentially provided with a second shutoff valve, a pressure sensor, an overflow valve, a high-pressure liquid inlet manifold assembly, a plunger pump and a second one-way valve, and the two branches are connected with a wellhead after being converged.
Preferably, the overflow valve is also connected with the mud pit through a pressure relief pipeline.
Preferably, high pressure inlet manifold assembly includes the inlet manifold who is connected with plunger pump fluid end, inlet manifold and inlet manifold fixed connection, inlet manifold one side is equipped with the manifold joint, and the opposite side is equipped with pressure balance device, inlet manifold still is equipped with sealing device with the hookup location department of plunger pump fluid end.
Preferably, the pressure balancing device is of an air bag or accumulator construction.
Preferably, inlet manifold upper end is provided with cyclic annular ladder groove, cyclic annular ladder groove bottom surface and plunger pump hydraulic pressure end bottom surface contact, cyclic annular ladder groove side and the inboard contact of plunger pump hydraulic pressure end, sealing device locates on the cyclic annular ladder groove.
Preferably, the sealing device comprises a first sealing groove arranged on the side part of the annular stepped groove, and a first supporting ring and a first sealing ring are arranged in the first sealing groove.
Preferably, the sealing device comprises a second sealing groove arranged at the bottom of the annular stepped groove, and a second support ring and a second sealing ring are arranged in the second sealing groove.
Preferably, the inlet manifold and the inlet main pipe are welded through a groove.
The utility model has the advantages that:
the utility model discloses can keep on the unchangeable basis of present piston pump supercharging system configuration, the small-size rig uses the present piston pump configuration can satisfy the requirement of new-type drilling technology, realizes under the prerequisite that does not upgrade present 20MPa drilling mud piston pump supercharging system, uses the piston pump to use the secondary supercharging system to promote the purpose of drilling mud pressure to 35MPa after the drilling mud is pressurized to 20 MPa; when the novel drilling machine is replaced, the overall upgrade of the configuration of the piston pump is not needed, so that the equipment acquisition cost is reduced; and the function of switching the primary pressurizing system or the secondary pressurizing system is realized through the design of a process pipeline.
The high-pressure liquid inlet manifold assembly in the utility model can bear higher suction pressure, and the high-pressure suction working condition of the secondary supercharging device is satisfied; the utility model has reliable connection with the hydraulic end of the plunger pump and convenient disassembly; the pressure balancing device is arranged in the pipeline, so that the stability of the suction pressure of the plunger pump is ensured.
Drawings
FIG. 1 is a schematic diagram of a two-stage drilling mud pressurization system;
FIG. 2 is a schematic diagram of the high pressure inlet manifold assembly of FIG. 1;
FIG. 3 is a schematic diagram of one of the structures of the hydraulic end of the booster pump connected with the inlet manifold;
FIG. 4 is an enlarged schematic view of region A in FIG. 3;
FIG. 5 is a schematic diagram of an alternative configuration of the connection of the hydraulic end of the booster pump to the inlet manifold;
FIG. 6 is an enlarged schematic view of region B in FIG. 5;
in the figure, a centrifugal pump 1, a piston pump 2, a high-pressure liquid inlet manifold assembly 3, a liquid inlet manifold 3.1, an annular stepped groove 3.1.1, a liquid inlet header pipe 3.2, a manifold joint 3.3, a pressure balancing device 3.4, a sealing device 3.5, a first sealing groove 3.5.1, a first supporting ring 3.5.2, a first sealing ring 3.5.3, a second sealing groove 3.5.4, a second supporting ring 3.5.5, a second sealing ring 3.5.6, a plunger pump 4, a slurry tank 5, a combined valve 6, a first shut-off valve 7, a first one-way valve 8, a second shut-off valve 9, a pressure sensor 10, a pressure sensor 11, a second one-way valve 12, a wellhead 13 and an overflow valve 14 are arranged.
Detailed Description
The invention is described in further detail below with reference to the figures and the embodiments.
As shown in fig. 1 to 6, a drilling mud two-stage supercharging system comprises a centrifugal pump 1 and a piston pump 2 which are connected through a pipeline, wherein an outlet end of the piston pump 2 is connected with an inlet of a high-pressure inlet manifold assembly 3 through a pipeline, and an outlet of the high-pressure inlet manifold assembly 3 is connected with a hydraulic end of a plunger pump 4.
Preferably, the inlet end of the centrifugal pump 1 is connected with the outlet of the mud pit 5 through a pipeline, and a combined valve 6 is further arranged on the pipeline where the outlet end of the piston pump 2 is located. The on-off of the whole pipeline can be controlled by the combined valve 6.
Preferably, the pipeline at the outlet end of the combined valve 6 is divided into two branches, one branch is sequentially provided with a first shut-off valve 7 and a first one-way valve 8, the other branch is sequentially provided with a second shut-off valve 9, a pressure sensor 10, an overflow valve 11, a high-pressure liquid inlet manifold assembly 3, a plunger pump 4 and a second one-way valve 12, and the two branches are connected with a wellhead 13 after being converged. When only one-stage pressurization is needed, the second shutoff valve 9 is closed, the first shutoff valve 7 is opened, and the drilling mud enters the wellhead 13 through the first shutoff valve 7 and the first one-way valve 8; while the drilling mud is prevented from flowing into the plunger pump 4 by the second non return valve 12 provided.
Preferably, the overflow valve 11 is also connected to the mud pit 5 via a pressure relief line 14. In this embodiment, it may be set that the overflow valve 11 does not operate when the drilling mud pressure is less than 24MPa, and that the overflow valve 11 opens when the drilling mud pressure reaches or exceeds 24MPa, and that the drilling mud returns to the mud pit 5 through the pressure relief line 14.
Preferably, as shown in fig. 2, high pressure inlet manifold assembly 3 includes inlet manifold 3.1 with 4 fluid ends of plunger pump are connected, inlet manifold 3.1 and inlet manifold 3.2 fixed connection, inlet manifold 3.2 one side is equipped with manifold joint 3.3, and the opposite side is equipped with pressure balance device 3.4, inlet manifold 3.1 still is equipped with sealing device 3.5 with the hookup location department of 4 fluid ends of plunger pump.
Preferably, the pressure equalizing device 3.4 is of air-bag or accumulator construction. The pressure balancing device 3.4 can suppress flow and pressure fluctuation in the manifold, thereby ensuring the stability of the working condition of the hydraulic end of the plunger pump 4. The air bag or the energy accumulator can well stabilize the pressure and compensate the pressure, and belongs to common parts in the field of petroleum machinery.
Preferably, as shown in fig. 3, inlet manifold 3.1 upper end is provided with cyclic annular ladder groove 3.1.1, cyclic annular ladder groove 3.1.1 bottom surface and 4 hydraulic pressure of plunger pump end bottom surface contacts, cyclic annular ladder groove 3.1.1 side contacts with 4 hydraulic pressure of plunger pump end inboard, sealing device 3.5 is located on cyclic annular ladder groove 3.1.1. The design of the annular stepped groove 3.1.1 is beneficial to matching and sealing the liquid inlet manifold 3.1 and the hydraulic end of the plunger pump 4, and the sealing device 3.5 can be realized by adopting various sealing modes;
as shown in fig. 3 and 4, the first sealing manner between the inlet manifold 3.1 and the hydraulic end of the plunger pump 4 is as follows: sealing device 3.5 is including setting up in the first sealed slot 3.5.1 of cyclic annular ladder groove 3.1.1 lateral part, be equipped with first supporting ring 3.5.2 and first sealing washer 3.5.3 in first sealed slot 3.5.1.
As shown in fig. 5 and 6, the second sealing manner between the inlet manifold 3.1 and the hydraulic end of the plunger pump 4 is: the sealing device 3.5 comprises a second sealing groove 3.5.4 arranged at the bottom of the annular stepped groove 3.1.1, and a second support ring 3.5.5 and a second sealing ring 3.5.6 are arranged in the second sealing groove 3.5.4.
The two sealing modes can ensure effective high-pressure sealing between the liquid inlet manifold 3.1 and the hydraulic end of the plunger pump 4, and a plurality of sealing devices 3.5 can be added when necessary to achieve better sealing effect.
In addition, in the embodiment, the liquid inlet manifold 3.1 and the liquid inlet header pipe 3.2 are made of high-pressure manifold materials, can bear the high pressure of more than 20MPa, and ensure the stable connection and reliable sealing of the liquid inlet manifold and the liquid inlet header pipe through structural design and a manufacturing process; the connection mode includes but is not limited to flange connection, union connection, welding and the like, and the integral penetration of the two can also be ensured through integral forging or casting process.
As shown in fig. 3, the inlet manifold 3.1 and the inlet header 3.2 are welded by a groove. This connection is simple and effective.
The working principle of the embodiment is as follows:
1) a primary pressurization process: opening the combined valve 6, closing the second shut-off valve 9, opening the first shut-off valve 7, starting the centrifugal pump 1 to pump out the drilling mud in the mud pit and send the drilling mud into the piston pump 2, wherein the liquid pressure of the drilling mud before the drilling mud is sent into the piston pump 2 is 0.1MPa, the liquid pressure reached after the drilling mud is pressurized once by the piston pump 2 is 20MPa, and then the drilling mud enters the wellhead 13 through the first shut-off valve 7 and the first one-way valve 8; while the drilling mud is prevented from flowing into the plunger pump 4 by the second non return valve 12 provided.
2) And (3) secondary pressurization process: opening the combined valve 6, opening the second shut-off valve 9, closing the first shut-off valve 7, starting the centrifugal pump 1 to pump out the drilling mud in the mud pit and send the drilling mud into the piston pump 2, wherein the liquid pressure of the drilling mud before being sent into the piston pump 2 is 0.1MPa, the liquid pressure reached after the primary pressurization of the piston pump 2 is 20MPa, then the drilling mud passes through the second shut-off valve 9, the overflow valve 11 and the high-pressure liquid inlet manifold assembly 3 and enters the plunger pump 4, the liquid pressure of the drilling mud before being sent into the plunger pump 4 is 20MPa, the liquid pressure reached after the secondary pressurization of the plunger pump 4 is 35MPa, and then the drilling mud enters the wellhead 13; while the drilling mud can be prevented from flowing back to the front of the first shut-off valve 7 by the arranged first one-way valve 8; in addition, the pressure sensor 10 can sense the pressure of the drilling mud before the drilling mud is sent into the plunger pump 4 in real time, when the pressure of the drilling mud reaches or exceeds 24MPa, the overflow valve 11 is opened, and the drilling mud returns to the mud pit 5 through the pressure relief pipeline 14.
The above embodiments are merely preferred technical solutions of the present invention, and should not be considered as limitations of the present invention, and the features in the embodiments and the examples in the present application may be arbitrarily combined with each other without conflict. The protection scope of the present invention shall be defined by the claims and the technical solutions described in the claims, including the technical features of the equivalent alternatives as the protection scope. Namely, equivalent alterations and modifications within the scope of the invention are also within the scope of the invention.
Claims (10)
1. A drilling mud two-stage supercharging system comprises a centrifugal pump (1) and a piston pump (2) which are connected through a pipeline, and is characterized in that: the outlet end of the piston pump (2) is connected with the inlet of the high-pressure liquid inlet manifold assembly (3) through a pipeline, and the outlet of the high-pressure liquid inlet manifold assembly (3) is connected with the hydraulic end of the plunger pump (4).
2. The drilling mud two-stage supercharging system of claim 1, wherein: the inlet end of the centrifugal pump (1) is connected with the outlet of the mud pit (5) through a pipeline, and a combined valve (6) is further arranged on the pipeline where the outlet end of the piston pump (2) is located.
3. The drilling mud two-stage supercharging system of claim 2, wherein: the pipeline where the outlet end of the combined valve (6) is located is divided into two branches, one branch is sequentially provided with a first shut-off valve (7) and a first one-way valve (8), the other branch is sequentially provided with a second shut-off valve (9), a pressure sensor (10), an overflow valve (11), a high-pressure liquid inlet manifold assembly (3), a plunger pump (4) and a second one-way valve (12), and the two branches are connected with a wellhead (13) after being converged.
4. A drilling mud two-stage supercharging system according to claim 3, wherein: the overflow valve (11) is also connected with the mud pit (5) through a pressure relief pipeline (14).
5. The drilling mud two-stage supercharging system of claim 1, wherein: high pressure inlet manifold assembly (3) include inlet manifold (3.1) be connected with plunger pump (4) fluid end, inlet manifold (3.1) and inlet manifold (3.2) fixed connection, inlet manifold (3.2) one side is equipped with manifold joint (3.3), and the opposite side is equipped with pressure balance device (3.4), inlet manifold (3.1) still are equipped with sealing device (3.5) with the hookup location department of plunger pump (4) fluid end.
6. The drilling mud two-stage boosting system of claim 5, wherein: the pressure balancing device (3.4) is of an air bag or accumulator structure.
7. The drilling mud two-stage boosting system of claim 5, wherein: inlet manifold (3.1) upper end is provided with cyclic annular ladder groove (3.1.1), contact of cyclic annular ladder groove (3.1.1) bottom surface and plunger pump (4) hydraulic pressure end bottom surface, the inboard contact of cyclic annular ladder groove (3.1.1) side and plunger pump (4) hydraulic pressure end, sealing device (3.5) are located on cyclic annular ladder groove (3.1.1).
8. The drilling mud two-stage supercharging system of claim 7, wherein: sealing device (3.5) are including setting up in first sealed slot (3.5.1) of cyclic annular ladder groove (3.1.1) lateral part, be equipped with first supporting ring (3.5.2) and first sealing washer (3.5.3) in first sealed slot (3.5.1).
9. The drilling mud two-stage supercharging system of claim 7, wherein: sealing device (3.5) is including setting up in second sealed trench (3.5.4) of cyclic annular ladder groove (3.1.1) bottom, be equipped with second support ring (3.5.5) and second sealing washer (3.5.6) in second sealed trench (3.5.4).
10. The drilling mud two-stage boosting system of claim 5, wherein: and the liquid inlet manifold (3.1) and the liquid inlet header pipe (3.2) are welded through grooves.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922332651.1U CN211287581U (en) | 2019-12-23 | 2019-12-23 | Two-stage pressurizing system for drilling mud |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922332651.1U CN211287581U (en) | 2019-12-23 | 2019-12-23 | Two-stage pressurizing system for drilling mud |
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| CN211287581U true CN211287581U (en) | 2020-08-18 |
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| CN201922332651.1U Active CN211287581U (en) | 2019-12-23 | 2019-12-23 | Two-stage pressurizing system for drilling mud |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022156262A1 (en) * | 2021-01-21 | 2022-07-28 | 烟台杰瑞石油装备技术有限公司 | Low-pressure liquid intake manifold and fracturing device |
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2019
- 2019-12-23 CN CN201922332651.1U patent/CN211287581U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022156262A1 (en) * | 2021-01-21 | 2022-07-28 | 烟台杰瑞石油装备技术有限公司 | Low-pressure liquid intake manifold and fracturing device |
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