CN116411866A - A large-volume batch mixer for well cementing operations - Google Patents

Abstract

The invention discloses a general batch mixing vehicle for well cementation operation, which comprises a frame and a batch mixing system fixedly connected in the middle of the top of the frame, wherein a power system, a slurry mixing system, a manifold system and a control system are also arranged on the top of the frame, and the front side and the rear side of the frame are fixedly connected with supporting leg cylinders; the invention relates to the technical field of well cementation operation equipment, in particular to a batch mixing system comprising a batch mixing pump, a filling pump, a batch mixing tank and a batch mixing stirrer fixedly connected with the top of the batch mixing tank. The general batch mixing vehicle for well cementation operation has the advantages that the batch mixing manifold and the filling manifold can be replaced, so that when the filling centrifugal pump or the batch mixing centrifugal pump cannot normally operate, the alternative scheme is provided for enabling the batch mixing vehicle to continue operation, the risk of miswork is reduced, the continuous batch mixing operation of general cement slurry can be realized by the whole vehicle, the development concept of 'small well site large operation' is met, the transportation is convenient and fast, the operation is reliable, and the requirement of high-difficulty well cementation operation is met.

Description

A large-volume batch mixer for well cementing operations

technical field

The invention relates to the technical field of cementing operation equipment, in particular to a large-volume batch mixing vehicle used for well cementing operations.

Background technique

With the increasing demand for cementing equipment supporting capabilities in the oilfield service industry, the collaborative operation technology of multiple cementing equipment with large displacement and high pressure has gradually emerged. This technology requires a higher density of cement slurry, and the cement slurry is mixed in batches continuously The equipment came into being. Compared with the traditional cementing truck, the batch mixing operation is more uniform and stable. The density fluctuation of the prepared cement slurry is less, which can meet the strict precision requirements and is more conducive to improving the cementing quality.

Looking at major well sites in China, conventional batch mixer trucks are usually used for batch mixing. The maximum mixing capacity is 2.3m ³ /min. Based on factors such as the quality of cement ash and the speed of ash removal, it is necessary to mix a large amount of cement slurry with a density that meets the standard. The time of more than 10 minutes cannot meet the continuous operation requirements of large displacement of cement slurry.

With more and more difficult operations such as large cement slurry volume and large displacement construction in shale gas development, the demand for uniform cement slurry density and high-quality slurry entering the well in batches is becoming more and more obvious. Therefore, the well site usually needs to arrange multiple units. Batch mixing equipment works together to meet the demand for cement slurry. This operation method has problems such as occupying well site space and wasting operating costs.

Contents of the invention

Aiming at the deficiencies of the prior art, the present invention provides a large-volume batch mixing vehicle for well cementing operations, which solves the problem that with the improvement of operation requirements, the well site usually needs to arrange multiple batch mixing equipment to work together to meet the requirements of cement slurry. This method of operation leads to the problems of occupying well site space and wasting operating costs.

In order to achieve the above object, the present invention is achieved through the following technical solutions: a large-scale batch mixing vehicle used for cementing operations, including a vehicle frame and a batch mixing system fixedly connected in the middle of the top of the vehicle frame, and the top of the vehicle frame is also installed It has a power system, a slurry mixing system, a manifold system and a control system, and the front and rear sides of the frame are fixedly connected with outrigger cylinders;

The batch mixing system includes a batch mixing pump, a filling pump, a batch mixing tank and a batch mixing agitator fixedly connected to the top thereof, and the feed port of the batch mixing pump is connected to the second outlet of the mixing slurry system through a feeding batch mixing pipe , the discharge port of the batch mixing pump is connected to the inlet of the batch mixing tank through the discharge batch mixing pipe, and the middle of the discharge batch mixing pipe is connected with the discharge port of the perfusion pump through the discharge perfusion pipe, and There are two output pipes connected in the middle of the discharge perfusion pipe, and the feed port of the perfusion pump is connected with the outlet of the batch mixing tank through the feed perfusion pipe;

A butterfly valve 8# is installed on the end of the batch mixing pipe near the batch mixing pump, and a butterfly valve 9# is installed on the batch mixing pipe after the discharge filling pipe, and a butterfly valve 9# is installed on the batch mixing pipe. Butterfly valve 2# and butterfly valve 5# are respectively installed at the front and back of the output pipe, and butterfly valve 3# and butterfly valve 4# are respectively installed on the two output pipes, and butterfly valve 10# and butterfly valve 10# are respectively installed on the two ends of the feed filling pipe 1#, butterfly valve 11# and butterfly valve 7# are respectively installed at both ends of the feed batch mixing pipe, and the feed filling pipe is located between butterfly valve 10# and butterfly valve 1# and the feeding batch mixing pipe is located The position between butterfly valve 11# and butterfly valve 7# is connected through a transfer pipe, and butterfly valve 6# is installed on the transfer pipe.

Preferably, the slurry mixing system includes a large-volume high-energy mixer fixedly connected to the top of the slurry-mixing tank and its top. The primary slurry mixing port of the mixer is connected with a jet pump through a water injection pipe, and the water inlet of the jet pump is connected with a water inlet pipe, and a flow meter, a filter and a butterfly valve are installed on the water inlet pipe.

Preferably, the first outlet of the mixing tank is connected to a circulation pump through an input circulation pipe, and the output port of the circulation pump is connected to the secondary mixing port of a large-volume high-energy mixer through an output circulation pipe, and the input circulation pipe is connected to the Butterfly valves are installed on the output circulation pipes.

Preferably, a detection pipeline is connected between the top of the mixing tank and the output circulation pipe, and a butterfly valve and a density meter are installed on the detection pipeline.

Preferably, the top of the batch mixing tank is also fixedly connected with an ash lowering funnel and an external water supply manifold.

Preferably, the control system is composed of a controller, a touch screen, an analog input and output module and control software, and the manifold system includes all pipelines.

Beneficial effect

The invention provides a large-volume batch mixing vehicle for well cementing operations. Compared with the prior art, it has the following beneficial effects:

1. Arrange large-scale high-energy mixers to fundamentally solve the problem of insufficient mixing capacity of existing batch mixing equipment.

2. The circulating centrifugal pump in the secondary mixing manifold is dedicated to complete the circulation of the cement slurry in the mixing tank. Ensure that the cement slurry in the mixing tank is more fully circulated, which is conducive to the mixing effect of the cement slurry; and then complete the more sufficient mixing in the large-capacity batch mixing tank, which can ensure the uniform and stable density of the formed slurry.

3. The batch mixing manifold and the filling manifold can be replaced by each other, which can ensure that when the filling centrifugal pump or the batch mixing centrifugal pump cannot operate normally, there is an alternative plan to enable the batch mixing truck to continue to work and reduce the risk of delay .

4. The whole vehicle can realize the continuous batch mixing operation of a large amount of cement slurry, which is in line with the development concept of "small well site, large operation", convenient transportation, reliable operation, and meets the needs of difficult cementing operations.

5. The single large-capacity batch mixing tank is adopted, the cement slurry stays longer and the mixing is more sufficient. Compared with the conventional batch mixing truck, there is no need to switch the batch mixing tank repeatedly, which simplifies the operation and streamlines the structure.

6. The whole vehicle can also realize the mud mixing function of ordinary cementing trucks, and the cement slurry can be pumped to the downstream equipment through the batch mixing pump by controlling the pneumatic butterfly valve through the operation console and making the batch mixing system not work.

Description of drawings

Fig. 1 is the front view of overall structure of the present invention;

Fig. 2 is a process flow diagram of the present invention;

Fig. 3 is a structural schematic diagram of a batch mixing tank of the present invention.

In the figure: 1. Power system; 2. Mixing system; 21. Mixing tank; 22. Large volume high-energy mixer; 23. Jet pump; 24. Flow meter; 25. Filter; 26. Circulation pump; 27. Density meter; 3. Manifold system; 4. Batch mixing system; 41. Batch mixing pump; 42. Filling pump; 43. Batch mixing tank; 44. Batch mixing agitator; 45. Ash hopper; 46. External water supply pipe sink; 5. outrigger cylinder; 6. frame; 7. control system.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Please refer to Figures 1-3, the present invention provides a technical solution: a large-scale batch mixing vehicle for well cementing operations, including a vehicle frame 6 and a batch mixing system 4 fixedly connected in the middle of the top, characterized in that: The top of frame 6 is also equipped with power system 1, slurry mixing system 2, manifold system 3 and control system 7, manifold system 3 includes all pipelines; control system 7 is controlled by controller, touch screen, analog input and output modules and The system is composed of software. The system controls the ratio of water intake and ash intake by collecting the density of cement slurry, the flow rate of clean water and the level of cement slurry, so as to control the density of cement slurry;

The power system 1 can be driven by an electric motor or a diesel engine. When the motor is used to drive, the well site needs to provide electricity, and the motor used must meet the explosion-proof level requirements of the well site; when the diesel engine is used to drive, the power of the diesel engine can be appropriately reduced, and the power source of some actuators can be distributed to the chassis of the car body engine.

The front and rear sides of the vehicle frame 6 are fixedly connected with outrigger oil cylinders 5. When preparing for batch mixing operations, the two groups of outrigger oil cylinders 5 in the front and rear of the vehicle frame 6 need to be filled with liquid, and the outrigger oil cylinders 5 and the vehicle frame 6 To share the overweight load when the mud tank is full; when the batch mixer is in the process of moving and not working, the outrigger cylinder 5 needs to be retracted.

The batch mixing system 4 includes a batch mixing pump 41, a filling pump 42, a batch mixing tank 43 and a batch mixing agitator 44 fixedly connected to the top thereof, and the top of the batch mixing tank 43 is also fixedly connected with an ash lowering funnel 45 and an external water supply manifold 46 In view of the stringent requirements on cement slurry density under difficult cementing conditions, when the cement slurry density in the batch mixing tank 43 is different from the required density, cement can be added to the batch mixing tank 43 through the ash lowering funnel 45 ash or add clean water through the external water supply manifold 46 to adjust the cement slurry density in the batch mixing tank 43, so as to mix the cement slurry with ideal density to complete the cementing operation. The feed port of the batch mixing pump 41 passes through the batch mixing The pipe is connected to the second outlet of the mixing system 2, and the discharge port of the batch mixing pump 41 is connected to the inlet of the batch mixing tank 43 through the discharge batch mixing pipe. The room is connected by the discharge filling pipe, and the middle of the discharge filling pipe is connected with two output pipes, and the feed port of the filling pump 42 is connected with the outlet of the batch mixing tank 43 through the feed filling pipe;

The batch mixing pump 41 pumps and discharges the mixed mud in the mixing tank 21 into the batch mixing tank 43, and the batch mixing agitator 44 performs more sufficient stirring and mixing, so that the formed mud density is uniform and stable, reaching high difficulty solid According to the well operation requirements, it is finally extracted and pumped to the downstream equipment through the injection pump 42 to prepare for the cementing operation.

Butterfly valve 8# is installed on the end of the discharge batch mixing pipe close to the batch mixing pump 41, butterfly valve 9# is installed on the discharge batch mixing pipe behind the discharge filling pipe, and the discharge batch mixing pipe is located at the front and rear positions of the output pipe respectively Butterfly valve 2# and butterfly valve 5# are installed, and butterfly valve 3# and butterfly valve 4# are installed on the two output pipes respectively, and butterfly valve 10# and butterfly valve 1# are respectively installed on the two ends of the feed filling pipe, feed batch mixing Butterfly valve 11# and butterfly valve 7# are installed at both ends of the pipe respectively, the feeding filling pipe is located between butterfly valve 10# and butterfly valve 1#, and the feeding batch mixing pipe is located between butterfly valve 11# and butterfly valve 7# It is connected through a transfer pipe, and butterfly valve 6# is installed on the transfer pipe.

When the filling pump 42 cannot operate normally, the batch mixing tank 43 can be filled with normal slurry first, then the mixing operation is stopped, and the butterfly valves 10#, 6# and 7# are opened, and the batch mixing tank 43 is operated by the batch mixing pump 41 The cement slurry in the tank is output to the downstream equipment through butterfly valve 5#, 3# or 5#, 4#; when the batch mixing pump 41 cannot operate normally, open the butterfly valve 11#, 6# and 1#, and the cement slurry in the mixing tank 21 It can be transported to the batch mixing tank 43 through the action of the filling pump 42 through the butterfly valves 2#, 5# and 9#. When the batch mixing tank 43 is full, stop the slurry mixing operation, and then restore the butterfly valve to the normal mode for filling operation. Although mud mixing and batch mixing operations cannot be carried out at the same time, this alternative mode can still ensure that the batch mixing truck can complete the cementing operation, reducing the risk of work delay due to equipment failure.

This batch mixing truck also has the function of ordinary cementing operation. The cement slurry can be directly output from the second output port of the mixing tank 21 to the downstream equipment to complete the cementing operation: by opening butterfly valves 11# and 7#, the batch mixing pump Under the action of 41, through butterfly valve 8# and 5#, it is output from the output port of butterfly valve 3# or 4#. Under this working condition, the batch mixing system does not need to work. This working mode is suitable for solid well environment.

The slurry mixing system 2 includes a slurry mixing tank 21 and a large-volume high-energy mixer 22 fixedly connected to the top thereof. The slurry mixing port is connected to a jet pump 23 through a water injection pipe, and the water inlet of the jet pump 23 is connected to a water inlet pipe, and a flow meter 24, a filter 25 and a butterfly valve are installed on the water inlet pipe, and the first outlet of the slurry mixing tank 21 passes through the input circulation. The pipe is connected with a circulation pump 26, and the output port of the circulation pump 26 is connected to the secondary mixing port of the large-volume high-energy mixer 22 through the output circulation pipe, and butterfly valves are installed on the input circulation pipe and the output circulation pipe, and the mixing tank 21 A detection pipeline is connected between the top and the output circulation pipe, and a butterfly valve and a density meter 27 are installed on the detection pipeline.

The ash inlet pipe adds cement ash into the large-volume high-energy mixer 22, and at the same time, the jet pump 23 pumps the water into the large-volume high-energy mixer 22, and after preliminary mixing with the cement ash, it falls into the mixing tank 21, and the circulation pump 26 passes through The input circulation pipe extracts the mud in the mixing tank 21, and then discharges it back into the large-volume high-energy mixer 22 through the output circulation pipe for secondary mud mixing, so that the cement slurry is more fully mixed.

At the same time, the content not described in detail in this manual belongs to the prior art known to those skilled in the art, and the model parameters of each electrical appliance are not specifically limited, and conventional equipment can be used.

It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is a relationship between these entities or operations. There is no such actual relationship or order between them. Furthermore, the term "comprises", "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article, or apparatus comprising a set of elements includes not only those elements, but also includes elements not expressly listed. other elements of or also include elements inherent in such a process, method, article, or device.

Although the embodiments of the present invention have been shown and described, those skilled in the art can understand that various changes, modifications and substitutions can be made to these embodiments without departing from the principle and spirit of the present invention. and modifications, the scope of the invention is defined by the appended claims and their equivalents.

Claims (6)

1. A large-scale batch mixing vehicle for well cementing operations, comprising a vehicle frame 6 and a batch mixing system 4 fixedly connected in the middle of the top thereof, characterized in that: the top of the vehicle frame 6 is also equipped with a power system 1, Mixing system 2, manifold system 3 and control system 7, the front and rear sides of the vehicle frame 6 are fixedly connected with outrigger cylinders 5; The batch mixing system 4 includes a batch mixing pump 41, an infusion pump 42, a batch mixing tank 43 and a batch mixing agitator 44 fixedly connected to the top thereof, and the feed port of the batch mixing pump 41 is connected to the mixing tube through the feeding batch mixing pipe. The second outlet of the slurry system 2 is connected, and the discharge port of the batch mixing pump 41 is connected with the inlet of the batch mixing tank 43 through the discharge batch mixing pipe, and the middle of the discharge batch mixing pipe is connected to the discharge port of the filling pump 42 They are connected by a discharge filling pipe, and the middle of the discharge filling pipe is connected with two output pipes, and the feed port of the filling pump 42 is connected with the outlet of the batch mixing tank 43 through the feed filling pipe; A butterfly valve 8# is installed on the end of the batch mixing pipe near the batch mixing pump 41, and a butterfly valve 9# is installed on the batch mixing pipe after the discharge filling pipe, and a valve 9# is installed on the batch mixing pipe. Butterfly valve 2# and butterfly valve 5# are respectively installed at the front and back of the output pipe, and butterfly valve 3# and butterfly valve 4# are respectively installed on the two output pipes, and butterfly valve 10# and butterfly valve 10# are respectively installed on the two ends of the feed filling pipe. Butterfly valve 1#, butterfly valve 11# and butterfly valve 7# are respectively installed on the two ends of the batch mixing pipe of the feed, and the feeding filling pipe is located between the butterfly valve 10# and the butterfly valve 1# and the feeding batch mixing pipe The position between butterfly valve 11# and butterfly valve 7# is connected through a transfer pipe, and butterfly valve 6# is installed on the transfer pipe. 2. A large-volume batch mixing truck for cementing operations according to claim 1, characterized in that: the mud mixing system 2 includes a mud mixing tank 21 and a large-volume high-energy mixer 22 fixedly connected to the top thereof The ash inlet of the large volume high-energy mixer 22 is connected with an ash inlet pipe at the primary slurry mixing port, and the primary slurry mixing port of the large volume high-energy mixer 22 is connected with a jet pump 23 through a water injection pipe, and the jet pump 23 The water inlet is connected with a water inlet pipe, and a flow meter 24, a filter 25 and a butterfly valve are installed on the water inlet pipe. 3. A large-volume batch mixing vehicle for cementing operations according to claim 2, characterized in that: the first outlet of the mixing tank 21 is connected with a circulation pump 26 through an input circulation pipe, and the circulation The output port of the pump 26 is connected to the secondary mixing port of the large-volume high-energy mixer 22 through the output circulation pipe, and butterfly valves are installed on both the input circulation pipe and the output circulation pipe. 4. A large-volume batch mixing vehicle for cementing operations according to claim 1, characterized in that: a detection pipeline is connected between the top of the mixing tank 21 and the output circulation pipe, and the detection pipe Butterfly valve and density meter 27 are installed on the road. 5 . The large-volume batch mixing truck for well cementing operations according to claim 1 , characterized in that: the top of the batch mixing tank 43 is also fixedly connected with an ash lowering funnel 45 and an external water supply manifold 46 . 6. A large-volume batch mixing vehicle for cementing operations according to claim 1, characterized in that: the control system 7 is composed of a controller, a touch screen, an analog input and output module and control software, and the Manifold system 3 includes all piping.

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