CN111306055A - High-pressure plunger pump hydraulic end valve box - Google Patents
High-pressure plunger pump hydraulic end valve box Download PDFInfo
- Publication number
- CN111306055A CN111306055A CN202010218911.7A CN202010218911A CN111306055A CN 111306055 A CN111306055 A CN 111306055A CN 202010218911 A CN202010218911 A CN 202010218911A CN 111306055 A CN111306055 A CN 111306055A
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- hole
- fracturing fluid
- axis
- valve box
- end cover
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/10—Valves; Arrangement of valves
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
Abstract
The invention discloses a hydraulic end valve box of a high-pressure plunger pump, which is provided with a fracturing fluid suction hole, a fracturing fluid discharge hole, a plunger hole and an end cover sealing hole, wherein the inner cavities of the valve box are communicated, the axis of the fracturing fluid suction hole is coincident with or parallel to the axis of the fracturing fluid discharge hole, the axis of the plunger hole which is vertically distributed with the axis of the fracturing fluid discharge hole is coincident with or parallel to the axis of the end cover sealing hole, and a regular space along the axial direction of the fracturing fluid suction hole or the fracturing fluid discharge hole is arranged in the inner cavity of the valve box. Through the technical scheme, a regular space is introduced into the hydraulic end valve box, the shape and the trend of the intersecting line are changed, the intersecting line is elongated, the effect of effectively reducing stress concentration of the key position is achieved, the stress concentration degree of the key position can be greatly reduced by comparing the finite element analysis results to obtain the optimized structure, and therefore the service life of the valve box can be remarkably prolonged.
Description
Technical Field
The invention relates to the technical field of oil field production equipment, in particular to a hydraulic end valve box of a high-pressure plunger pump.
Background
The fracturing technology is a method for forming cracks in a hydrocarbon-bearing stratum by utilizing the action of liquid pressure, is a conventional yield increasing technology for oil and gas fields, and is widely applied. The main equipment in the fracturing construction is a high-pressure plunger pump which is divided into a power end and a hydraulic end, the power end converts the energy of a diesel engine or a motor into kinetic energy and transmits the kinetic energy to the hydraulic end through a plunger, the main part of the hydraulic end is a valve box, the plunger, various valve body valve seats and sealing fittings, and the high-pressure plunger pump has the functions of sucking liquid and sand grains under normal pressure through the movement of the plunger in the hydraulic end, pressurizing the liquid to required pressure through compressing the liquid and then discharging the valve box to be injected into an oil and gas well. As shown in fig. 1, the five-cylinder hydraulic end valve box of a typical high-pressure plunger pump comprises a fracturing fluid suction hole 1, a fracturing fluid discharge hole 2, a plunger hole 3 and an end cover sealing hole 4. The technical performance of the hydraulic end is directly related to the field construction effect and the operation safety, so that the high-pressure plunger pump, particularly the hydraulic end, has the characteristics of high pressure resistance, fatigue resistance, corrosion resistance, strong abrasion resistance, long service life and the like.
However, the primary approach to unconventional oil and gas development is horizontal well staged fracturing. Along with the unconventional development, the number of high-pressure wells and deep wells in oil and gas exploitation is gradually increased, the pressure borne by the hydraulic end of a high-pressure plunger pump is also increased, the service life of a valve box is greatly influenced due to the harsh high-pressure condition, the valve box is often failed, and the fracturing process efficiency and a series of related costs are seriously influenced.
The hydraulic end valve box is subjected to high frequency, high amplitude periodic pressure, and the common failure belongs to stress corrosion fatigue failure under high stress. In general, the failure positions of the hydraulic end valve box are concentrated at the positions with higher stress concentration in the cavity of the valve box, small surface cracks are generated at the positions, and are gradually expanded under the action of high-frequency high-amplitude fatigue stress until the whole valve box starts to fail or even is punctured. As shown in fig. 2-4, the four locations where valve box intersection line stress concentrations are significant are a first existing stress concentration point 13, a second existing stress concentration point 14, a third existing stress concentration point 23, and a fourth existing stress concentration point 24, respectively.
In order to prolong the service life of the hydraulic end, measures such as changing the material of the hydraulic end, hardening the surface of an inner cavity, self-reinforcing treatment and the like are commonly adopted for the design and the manufacture of the whole valve box, and stress concentration is reduced for the stress concentration part by means of structure optimization, production process optimization and the like. The means comprises the conventional intersecting line chamfering processing adopted for reducing stress concentration of a key area, namely, the intersecting line is naturally formed after the processing of a fracturing fluid suction hole, a fracturing fluid discharge hole, a plunger hole and an end cover sealing hole is finished, and finally the intersecting line is polished by means of manual polishing or special equipment, particularly, a first existing stress concentration point 13, a second existing stress concentration point 14, a third existing stress concentration point 23 and a fourth existing stress concentration point 24 are changed into a chamfering of arc transition through an acute angle to reduce the stress concentration, but as shown in figure 5, a comparison graph of the intersecting line naturally generated during the processing of the valve box and the intersecting line after polishing is shown, wherein 5 is the naturally generated intersecting line, 6 is the processed intersecting line, and the shape and the trend of the intersecting line after manual polishing or special equipment processing which are commonly used at present are not changed, the acute angles of the intersecting lines are blunted to achieve the purpose of reducing stress concentration at the positions of the intersecting lines, that is, it can be known through finite element simulation that after the chamfer radius is increased to a certain degree, the concentrated stress of the first existing stress concentration point 13, the second existing stress concentration point 14, the third existing stress concentration point 23 and the fourth existing stress concentration point 24 will not change obviously.
Accordingly, it would be an urgent problem to one skilled in the art to provide a high pressure plunger pump hydraulic end valve housing having a significantly reduced level of stress concentration at the intersection line.
Disclosure of Invention
In view of this, the invention provides a hydraulic end valve box of a high-pressure plunger pump, which changes the shape and the trend of an intersecting line and achieves the effect of effectively reducing stress concentration at a key position.
In order to achieve the purpose, the invention adopts the following technical scheme:
a high-pressure plunger pump hydraulic end valve box is provided with a fracturing fluid suction hole, a fracturing fluid discharge hole, a plunger hole and an end cover sealing hole, wherein inner cavities of the fracturing fluid suction hole, the fracturing fluid discharge hole, the plunger hole and the end cover sealing hole are communicated, the axis of the fracturing fluid suction hole is coincident with or parallel to the axis of the fracturing fluid discharge hole, the axis of the plunger hole and the axis of the end cover sealing hole, which are vertically distributed, are coincident with or parallel to each other, and a regular space extending along the axis direction of the fracturing fluid suction hole or the axis direction of the fracturing fluid discharge hole is formed in the inner cavity of the valve box.
Further, the regular space is a cylinder or a cone.
By adopting the scheme, the invention has the beneficial effects that:
on the basis of not changing the general spare parts of the fracturing pump fluid end used in the existing oil field, through the statistics of the failure actual data and the failure positions of the valve box, the analysis result of the finite element simulation tool is combined to optimize the structure of the critical positions of the fluid end valve box, which are easy to generate fatigue, stress corrosion and abrasion erosion, the intersecting line is lengthened, the stress concentration degree of the critical positions is effectively reduced, the stress concentration degree of the critical positions can be greatly reduced by comparing the finite element analysis result to obtain the optimized structure, and therefore the service life of the valve box can be obviously prolonged.
A high-pressure plunger pump hydraulic end valve box is provided with a fracturing fluid suction hole, a fracturing fluid discharge hole, a plunger hole and an end cover sealing hole, wherein inner cavities of the fracturing fluid suction hole, the fracturing fluid discharge hole, the plunger hole and the end cover sealing hole are communicated, the axis of the fracturing fluid suction hole is coincident with or parallel to the axis of the fracturing fluid discharge hole, the axis of the plunger hole which is vertically distributed with the axis of the fracturing fluid suction hole is coincident with or parallel to the axis of the end cover sealing hole, and a spherical space which takes the intersection point of any two orthogonal axes in the axis of the fracturing fluid suction hole, the axis of the fracturing fluid discharge hole, the axis of the plunger hole and the axis of the end cover sealing hole as a reference is arranged. A
Furthermore, the fracturing fluid suction hole and the plunger hole, the fracturing fluid discharge hole and the plunger hole, the fracturing fluid suction hole and the end cover sealing hole, and the fracturing fluid discharge hole and the end cover sealing hole are intersected in pairs to form intersecting lines corresponding to the spherical space.
Further, the intersecting line is ground to form an arc chamfer.
By adopting the scheme, the invention has the beneficial effects that:
on the basis of not changing the general spare parts of the fracturing pump fluid end used in the existing oil field, through the valve box failure actual data and failure position statistics, the analysis result of a finite element simulation tool is combined to optimize the structure of the critical position of the valve box at the fluid end, which is easy to generate fatigue, stress corrosion and abrasion erosion, a spherical space is introduced into the valve box at the fluid end, the shape and the trend of an intersecting line are changed, the intersecting line is elongated, the stress concentration degree of the critical position is effectively reduced, the optimized structure can be obtained through the comparison of the finite element analysis result, the stress concentration degree of the critical position can be greatly reduced, and therefore the service life of the valve box can be obviously prolonged.
A high-pressure plunger pump hydraulic end valve box is provided with a fracturing fluid suction hole, a fracturing fluid discharge hole, a plunger hole and an end cover sealing hole, wherein inner cavities of the fracturing fluid suction hole, the fracturing fluid discharge hole, the plunger hole and the end cover sealing hole are communicated, and the axis of the fracturing fluid suction hole is coincident with or parallel to the axis of the fracturing fluid discharge hole and is coincident with or parallel to the axis of the plunger hole and the axis of the end cover sealing hole which are vertically distributed; the fracturing fluid suction hole and the plunger hole, the fracturing fluid discharge hole and the plunger hole, the fracturing fluid suction hole and the end cover sealing hole, and the fracturing fluid discharge hole and the end cover sealing hole are intersected pairwise to form a first intersecting line, and one or more parts of the first intersecting line are cut or polished according to a preset contour to form a straightened second intersecting line.
Furthermore, the preset contour is a line whole formed by combining a straight line segment and two circular arc segments at two ends of the straight line segment.
Further, the preset contour is a line whole formed by combining a plurality of arc segments.
By adopting the scheme, the invention has the beneficial effects that:
the valve box is characterized in that one or more parts of a first intersecting line naturally generated in the valve box machining process are machined and transformed to change the shape and the trend of the first intersecting line so as to play a role in dispersing stress concentration, so that the first intersecting line is straightened, the shape and the trend of the first intersecting line are changed to obtain a second intersecting line, the effects of expanding the bearing pressure area and reducing the stress concentration level are achieved, and the service life of the valve box is prolonged.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a schematic diagram of a hydraulic end of a conventional high-pressure plunger pump;
FIG. 2 is a schematic view of the interior chamber of the fluid end valve housing of FIG. 1;
FIG. 3 is a schematic cross-sectional view of the interior chamber of the fluid end valve housing of FIG. 2;
FIG. 4 is a schematic cross-sectional view of the interior chamber of the fluid end valve housing of FIG. 2;
FIG. 5 is a schematic diagram showing a comparison between the shape of a naturally occurring intersection line (first intersection line) and the shape of a processed intersection line (first intersection line);
FIG. 6 is a schematic view showing an inner chamber of a hydraulic end valve box in embodiment 1 of the present invention;
FIG. 7 is a schematic cross-sectional view of the interior chamber of the fluid end valve housing of FIG. 6 in accordance with the present invention;
FIG. 8 is a schematic cross-sectional view of the interior chamber of the fluid end valve housing of FIG. 6 in accordance with the present invention;
FIG. 9 is a schematic diagram illustrating the comparison of the shape of the intersection line formed in FIG. 6 with a conventional intersection line provided by the present invention;
FIG. 10 is a schematic view showing an inner chamber of a hydraulic end valve box in embodiment 2 of the present invention;
FIG. 11 is a schematic cross-sectional view of the interior chamber of the fluid end manifold of FIG. 10 according to the present invention;
FIG. 12 is a schematic cross-sectional view of the interior chamber of the fluid end manifold of FIG. 10 according to the present invention;
FIG. 13 is a schematic diagram illustrating the comparison of the shape of the intersection line formed in FIG. 10 with a conventional intersection line provided by the present invention;
FIG. 14 is a schematic sectional view of an inner chamber of a hydraulic end valve box in embodiment 3 of the present invention;
FIG. 15 is a schematic illustration of a predetermined profile provided by the present invention;
FIG. 16 is a schematic illustration of a predetermined profile provided by the present invention;
fig. 17 is a schematic diagram of a space structure of an inner cavity of the hydraulic end valve box in fig. 14 according to the present invention.
In the figure: 1-a fracturing fluid suction port, 2-a fracturing fluid discharge port, 3-a plunger port, 4-an end cap seal port, 5-a naturally occurring intersection line, 6-a finished intersection line, 13-a first existing stress concentration point, 14-a second existing stress concentration point, 23-a third existing stress concentration point, 24-a fourth existing stress concentration point, 131-a first stress concentration point, 141-a second stress concentration point, 231-a third stress concentration point, 241-a fourth stress concentration point, 132-a first stress concentration point, 142-a second stress concentration point, 232-a third stress concentration point, 242-a fourth stress concentration point, 5A-a first intersection line, 6A-a finished first intersection line, 13A-an existing stress concentration point, 133A-stress concentration point.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1:
as shown in fig. 6, the embodiment of the invention discloses a hydraulic end valve box of a high-pressure plunger pump, which is provided with a fracturing fluid suction hole 1, a fracturing fluid discharge hole 2, a plunger hole 3 and an end cover sealing hole 4, wherein the inner cavities of the valve box are communicated, the axis of the fracturing fluid suction hole 1 is coincident with or parallel to the axis of the fracturing fluid discharge hole 2, the axis of the plunger hole 3 vertically distributed with the axis of the end cover sealing hole 4 is coincident with or parallel to the axis, and a regular space extending along the axial direction of the fracturing fluid suction hole 1 or the axial direction of the fracturing fluid discharge hole 2 is arranged in the inner cavity of the valve box. Through the technical scheme, on the basis of not changing the general spare parts of the hydraulic end of the fracturing pump used in the existing oil field, the actual data of the failure of the valve box and the statistics of the failure position are carried out, the analysis result of a finite element simulation tool is combined to optimize the structure of the critical position of the hydraulic end valve box, which is easy to generate fatigue, stress corrosion and abrasion erosion, a regular space is introduced into the hydraulic end valve box, the shape and the trend of the intersecting line are changed, the intersecting line is elongated, the effect of effectively reducing the stress concentration of the critical position is achieved, the stress concentration degree of the critical position can be greatly reduced by comparing the finite element analysis result to obtain the optimized structure, and therefore the service life of the valve box can be obviously prolonged.
Specifically, the regular space is a cylinder or a cone.
Specifically, the fracturing fluid suction hole 1 and the plunger hole 3, the fracturing fluid discharge hole 2 and the plunger hole 3, the fracturing fluid suction hole 1 and the end cover sealing hole 4, and the fracturing fluid discharge hole 2 and the end cover sealing hole 4 are intersected two by two to form intersecting lines corresponding to regular spaces.
Specifically, the intersecting line is ground to form a circular arc chamfer.
As shown in fig. 7, the positions of the third stress concentration point 231 and the fourth stress concentration point 241 are greatly changed compared with the positions of the third existing stress concentration point 23 and the fourth existing stress concentration point 24, the intersecting line processed according to the scheme of the present embodiment is elongated, and the stress concentration at the key position is effectively reduced.
As shown in fig. 8, the positions of the first stress concentration point 131 and the second stress concentration point 141 are greatly changed compared with the positions of the first existing stress concentration point 13 and the second existing stress concentration point 14, the intersecting line processed according to the scheme of the embodiment is elongated, and the stress concentration at the key position is effectively reduced.
As shown in fig. 9, the left side in the drawing is the shape and the trend of the intersecting line in the cavity of the conventional valve box, and the right side is the shape and the trend of the intersecting line after the solution of the present embodiment is adopted.
Example 2:
as shown in fig. 10, the embodiment of the invention discloses a hydraulic end valve box of a high-pressure plunger pump, which is provided with a fracturing fluid suction hole 1, a fracturing fluid discharge hole 2, a plunger hole 3 and an end cover sealing hole 4, wherein the inner cavities of the valve box are communicated, the axis of the fracturing fluid suction hole 1 is coincident with or parallel to the axis of the fracturing fluid discharge hole 2, the axis of the plunger hole 3 vertically distributed with the fracturing fluid suction hole is coincident with or parallel to the axis of the end cover sealing hole 4, and a spherical space which takes the intersection point of any two orthogonal axes of the axis of the fracturing fluid suction hole 1, the axis of the fracturing fluid discharge hole 2, the axis of the plunger hole 3 and the axis of the end cover sealing hole 4 as a reference is arranged in the inner. Through the technical scheme, on the basis of not changing the general spare parts of the hydraulic end of the fracturing pump used in the existing oil field, the failure actual data and failure position statistics of the valve box are carried out, the analysis result of a finite element simulation tool is combined to optimize the structure of the critical position of the hydraulic end valve box, which is easy to fatigue, stress corrosion and abrasion erosion, a spherical space is introduced into the hydraulic end valve box, the shape and the trend of the intersecting line are changed, the intersecting line is elongated, the effect of effectively reducing stress concentration of the critical position is achieved, the stress concentration degree of the critical position can be greatly reduced by comparing the optimized structure through the finite element analysis result, and therefore the service life of the valve box can be obviously prolonged.
Specifically, the fracturing fluid suction hole 1 and the plunger hole 3, the fracturing fluid discharge hole 2 and the plunger hole 3, the fracturing fluid suction hole 1 and the end cover seal hole 4, and the fracturing fluid discharge hole 2 and the end cover seal hole 4 are intersected in pairs to form intersecting lines corresponding to spherical spaces.
Specifically, the intersecting line is ground to form a circular arc chamfer.
As shown in fig. 11, the positions of the third stress concentration point 232 and the fourth stress concentration point 242 are greatly changed compared with the positions of the third existing stress concentration point 23 and the fourth existing stress concentration point 24, the intersecting line processed according to the scheme of the present embodiment is elongated, and the stress concentration at the key position is effectively reduced.
As shown in fig. 12, the positions of the first stress concentration point 132 and the second stress concentration point 142 are greatly changed compared with the positions of the first existing stress concentration point 13 and the second existing stress concentration point 14, the intersecting line processed according to the scheme of the present embodiment is elongated, and the stress concentration at the key position is effectively reduced.
As shown in fig. 13, the left side in the drawing is the shape and the trend of the intersecting line in the cavity of the conventional valve box, and the right side is the shape and the trend of the intersecting line after the solution of the present embodiment is adopted.
Example 3:
as shown in fig. 1-4 and 14, the embodiment of the invention discloses a hydraulic end valve box of a high-pressure plunger pump, which is provided with a fracturing fluid suction hole 1, a fracturing fluid discharge hole 2, a plunger hole 3 and an end cover sealing hole 4, wherein the inner cavities of the fracturing fluid suction hole 1 are communicated with each other, the axis of the fracturing fluid suction hole 1 is coincident with or parallel to the axis of the fracturing fluid discharge hole 2, and the axis of the plunger hole 3 and the axis of the end cover sealing hole 4 which are vertically distributed are coincident with or parallel to each other; the fracturing fluid suction hole 1 and the plunger hole 3, the fracturing fluid discharge hole 2 and the plunger hole 3, the fracturing fluid suction hole 1 and the end cover sealing hole 4, and the fracturing fluid discharge hole 2 and the end cover sealing hole 4 are intersected pairwise to form a first intersecting line 5A, and one or more parts of the first intersecting line 5A are cut or polished according to a preset contour to form a straightened second intersecting line. Through above-mentioned technical scheme, with valve box processing in the natural generation first looks transversal 5A's one or several department process the transformation and change its shape and move towards in order to play the effect that dispersed stress concentrates to straighten first looks transversal 5A, change first looks transversal 5A's shape and move towards and obtain the second transversal, realized enlarging the bearing pressure area, reduced stress concentration horizontally effect, improved valve box's life.
As shown in fig. 15, specifically, the predetermined profile is a line entirety formed by combining a straight line segment and two circular arc segments at two ends of the straight line segment.
As shown in fig. 16, specifically, the predetermined contour is a line entirety formed by combining a plurality of circular arc segments.
As shown in fig. 17, specifically, the existing stress concentration point 13A of the first intersection line 5A is cut or polished according to a predetermined profile to obtain a second intersection line and a stress concentration point 133A, and the straight line segment of the predetermined profile in fig. 6 or the middle circular arc segment of the predetermined profile in fig. 7 can straighten the first intersection line 5A, thereby expanding the pressure bearing area, reducing the effect of stress concentration level, and improving the service life of the valve box.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (8)
1. A high-pressure plunger pump hydraulic end valve box is provided with a fracturing fluid suction hole, a fracturing fluid discharge hole, a plunger hole and an end cover sealing hole, wherein the inner cavities of the valve box are communicated, the axis of the fracturing fluid suction hole is coincident with or parallel to the axis of the fracturing fluid discharge hole, and the axis of the plunger hole which is vertically distributed with the axis of the fracturing fluid suction hole is coincident with or parallel to the axis of the end cover sealing hole.
2. The high pressure plunger pump hydraulic end valve box of claim 1, wherein the regular space is a cylinder or a cone.
3. A high-pressure plunger pump hydraulic end valve box is provided with a fracturing fluid suction hole, a fracturing fluid discharge hole, a plunger hole and an end cover sealing hole, wherein the inner cavities of the valve box are communicated, the axis of the fracturing fluid suction hole is coincident with or parallel to the axis of the fracturing fluid discharge hole, and the axis of the plunger hole and the axis of the end cover sealing hole, which are vertically distributed, are coincident with or parallel to each other.
4. The hydraulic end valve box of the high-pressure plunger pump according to any one of claims 1 to 3, wherein the fracturing fluid suction hole and the plunger hole, the fracturing fluid discharge hole and the plunger hole, the fracturing fluid suction hole and the end cover sealing hole, and the fracturing fluid discharge hole and the end cover sealing hole intersect with each other two by two to form intersecting lines corresponding to the regular spaces.
5. The high pressure plunger pump hydraulic end valve box of claim 4, wherein the intersection line is ground to form a rounded chamfer.
6. A high-pressure plunger pump hydraulic end valve box is provided with a fracturing fluid suction hole, a fracturing fluid discharge hole, a plunger hole and an end cover sealing hole, wherein inner cavities of the fracturing fluid suction hole, the fracturing fluid discharge hole, the plunger hole and the end cover sealing hole are communicated, and the axis of the fracturing fluid suction hole is coincident with or parallel to the axis of the fracturing fluid discharge hole and is coincident with or parallel to the axis of the plunger hole and the axis of the end cover sealing hole which are vertically distributed; the fracturing fluid suction hole and the plunger hole, the fracturing fluid discharge hole and the plunger hole, the fracturing fluid suction hole and the end cover sealing hole, and the fracturing fluid discharge hole and the end cover sealing hole are intersected pairwise to form a first intersecting line, and the fracturing fluid suction hole and the end cover sealing hole are characterized in that one or more parts of the first intersecting line are cut or polished according to a preset contour to form a straightened second intersecting line.
7. The hydraulic end valve box of the high-pressure plunger pump according to claim 6, wherein the predetermined contour is a line integral body formed by combining a straight line segment and two circular arc segments at two ends of the straight line segment.
8. The high pressure plunger pump hydraulic end valve box according to claim 6, wherein the predetermined contour is a line integral body formed by combining a plurality of circular arc sections.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010218911.7A CN111306055A (en) | 2020-03-25 | 2020-03-25 | High-pressure plunger pump hydraulic end valve box |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010218911.7A CN111306055A (en) | 2020-03-25 | 2020-03-25 | High-pressure plunger pump hydraulic end valve box |
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| CN111306055A true CN111306055A (en) | 2020-06-19 |
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|---|---|---|---|
| CN202010218911.7A Pending CN111306055A (en) | 2020-03-25 | 2020-03-25 | High-pressure plunger pump hydraulic end valve box |
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| CN (1) | CN111306055A (en) |
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2020
- 2020-03-25 CN CN202010218911.7A patent/CN111306055A/en active Pending
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