CN218177442U - Piston rubber for drilling pump, piston assembly and hydraulic end for drilling pump - Google Patents
Piston rubber for drilling pump, piston assembly and hydraulic end for drilling pump Download PDFInfo
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- CN218177442U CN218177442U CN202222457928.5U CN202222457928U CN218177442U CN 218177442 U CN218177442 U CN 218177442U CN 202222457928 U CN202222457928 U CN 202222457928U CN 218177442 U CN218177442 U CN 218177442U
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Abstract
The utility model discloses a piston rubber, piston assembly and drilling pump fluid end for drilling pump, this piston rubber include and be annular piston ring, the top of piston ring is equipped with the concave slope of deviation central point and putting the slope, the outside surface of piston ring includes first annular portion and second annular portion from bottom to top in proper order, first annular portion is the face of cylinder, the maximum diameter position in second annular portion hugs closely the work inner chamber face of drilling pump, and the contained angle of the plane or tangent plane that second annular portion located and the work inner chamber face of drilling pump is the acute angle; the reciprocating motion piston rubber solves the problems that the piston rubber is easy to clamp and seriously abraded in the reciprocating motion process of the existing piston rubber, the service life of the piston rubber is prolonged, the influence on drilling operation caused by stopping a pump and replacing the piston rubber and a piston assembly is reduced, the working strength of constructors is also reduced, and meanwhile, the construction cost is reduced.
Description
Technical Field
The utility model relates to a pump body piston technical field especially relates to a piston rubber, piston assembly and drilling pump fluid end for drilling pump.
Background
At present, the drilling operation in oil and gas field exploitation is the basis and the premise of oil and gas exploitation, and a drilling mud pump is used as a key component in drilling equipment and is convenient for a drill bit to drill and discharge rock debris out of a well by pumping high-pressure drilling fluid to the bottom of the well. The mud pump provides power through the power end, drives the piston to carry out high-speed reciprocating linear motion, and then promotes the drilling fluid in the mud pump fluid end valve box to inhale and discharge and realize the pumping. The piston is used as a key part for realizing the pumping function of the slurry pump, the service life of the piston rubber directly influences the construction efficiency in the process of high-speed reciprocating motion, the service life of the existing piston is short in the construction process of the current drilling operation, the existing piston can only work for 100-200 hours generally, and most of the damaged parts of the piston are the parts of the piston rubber, which are in contact with the inner cavity surface of the cylinder sleeve, so that the parts are worn quickly.
As shown in figure 2, when the mud pump works, a power end in the drilling pump drives a piston assembly I to do left-right reciprocating linear motion through a pull rod, a piston rubber is driven by the piston assembly to synchronously move in a working inner cavity surface II, so that the suction and discharge of drilling fluid in a suction end valve box and a discharge end valve box are realized, the traditional piston rubber adopts a single conical surface structure, as shown in figure 1, the structure usually only has one direction to do smooth motion in the using process, and when the structure moves in the opposite direction, the motion is blocked or blocked, so that the piston rubber is abraded.
Therefore, the existing piston rubber obviously has certain defects in use stability, and needs to be further improved.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to provide a piston rubber, piston assembly and drilling pump fluid end for drilling pump, it has solved current piston rubber reciprocating motion in-process and has easily taken place the card and pause, the serious problem of wearing and tearing to overcome the not enough of prior art.
In order to solve the technical problem, the utility model provides a piston rubber for drilling pump, it is including being annular piston ring, the top of piston ring is equipped with the concave slope of inclined to central point, the outside surface of piston ring is by supreme first annular portion and the second annular portion of including in proper order down, first annular portion is the face of cylinder, the work inner chamber face of drilling pump is hugged closely to the maximum diameter position in the second annular portion, just the contained angle that second annular portion located plane or tangent plane and the work inner chamber face of drilling pump is the acute angle.
As an improvement of the present invention, the second annular portion includes a first tapered surface and a second tapered surface, wherein one side of the first tapered surface is connected to the first annular portion, and the other side of the first tapered surface is inclined away from the central position of the piston ring; one side of the second conical surface is connected with the first conical surface, and the other side of the second conical surface is connected with the outer side of the concave inclined surface in the piston ring; the connecting position of the first conical surface and the second conical surface is tightly attached to the working inner cavity surface of the drilling pump, the included angle between the second conical surface and the working inner cavity surface of the drilling pump is an acute angle, and the included angle between the first conical surface and the working inner cavity surface of the drilling pump is an acute angle.
As a further improvement of the present invention, a first transition arc surface is disposed at a connection position of the first tapered surface and the second tapered surface, and the first transition arc surface is respectively in tangential connection with the first tapered surface and the second tapered surface; the first transition cambered surface is tightly attached to the working inner cavity surface of the drilling pump, and the included angle between the upper part of the vertical extension line and the second conical surface is an acute angle and the included angle between the lower part of the vertical extension line and the first conical surface is an acute angle from the vertical extension line where the contact position point of the first transition cambered surface is located.
As an improvement of the utility model, the second conical surface is equipped with the second transition cambered surface with the hookup location on concave inclined plane, second transition cambered surface keeps tangent the connection with second conical surface, concave inclined plane respectively.
As a further improvement of the present invention, the second annular portion includes a first conical surface and a first arc-shaped surface, one side of the first conical surface is connected to the first annular portion, and the other side of the first conical surface is inclined away from the center of the piston ring; first arcwall face one side is tangent with first conical surface and is connected, the opposite side of first arcwall face is tangent with the concave slope and is connected, the work cavity face of drilling pump is hugged closely to first arcwall face contact position point locates the vertical extension line, and the upper portion of vertical extension line is the acute angle with the contained angle of the tangent line of first arcwall face, and the lower part of vertical extension line is the acute angle with the contained angle of first conical surface.
As an improvement of the present invention, the second annular portion includes a first conical surface, a first arc-shaped surface and a second arc-shaped surface, one side of the first conical surface is connected to the first annular portion, and the other side of the first conical surface is inclined away from the center of the piston ring; one side edge of the first arc-shaped surface is tangentially connected with the first conical surface, the first arc-shaped surface is tightly attached to the working inner cavity surface of the drilling pump, and by using a vertical extension line where the contact position point of the first arc-shaped surface is located, the included angle between the upper part of the vertical extension line and the tangent line of the first arc-shaped surface is an acute angle, and the included angle between the lower part of the vertical extension line and the first conical surface is an acute angle; the other side edge of the first arc-shaped surface is tangentially connected with one side edge of the second arc-shaped surface; the other side edge of the second arc-shaped surface is tangentially connected with the concave inclined surface.
As a further improvement of the utility model, the piston rubber is made of polyurethane material, nylon material or rubber material.
In addition the utility model also discloses a piston assembly for the drilling pump, wherein adopted foretell piston rubber in the piston assembly.
Simultaneously the utility model discloses still disclose a drilling pump is with hydraulic end, its including the work inner chamber face that is used for cooperating piston assembly reciprocating motion, wherein adopt foretell piston assembly in the work inner chamber face.
After adopting such design, the utility model discloses at least, following advantage has:
the utility model discloses in improve traditional piston rubber structure, especially optimize the position to the contact of piston rubber and well drilling pump work inner chamber face, design into two adjacent conical surfaces with the original single conical surface of traditional piston rubber, perhaps design into the arcwall face with single conical surface, the contained angle that makes piston rubber and well drilling pump work inner chamber face form remains the acute angle throughout in piston rubber motion process, thereby it is smooth and easy to avoid piston rubber to appear only one direction motion in reciprocating motion process, and opposite direction motion is obstructed or the card is dun, cause the easy wearing and tearing condition of piston rubber, in order to promote the life of piston rubber and piston assembly.
Drawings
The foregoing is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood, the present invention is described in further detail below with reference to the accompanying drawings and the detailed description of the present invention.
Fig. 1 is a schematic structural diagram of a piston rubber for a conventional drilling pump.
Fig. 2 is a schematic view of a mounting structure of a hydraulic end inner piston assembly for a conventional drilling pump.
Fig. 3 is a schematic structural diagram of a piston assembly for a drilling pump according to embodiment 1 of the present invention.
Fig. 4 is a schematic structural diagram of a piston rubber in embodiment 2 of the present invention.
Fig. 5 is a schematic structural view of a piston rubber in embodiment 3 of the present invention.
Fig. 6 is a schematic structural view of a piston rubber in embodiment 4 of the present invention.
Fig. 7 is a schematic structural view of a piston rubber in embodiment 5 of the present invention.
Fig. 8 is a schematic structural view of a piston rubber in embodiment 6 of the present invention.
The reference numbers in the figures are in particular:
i, a piston assembly and II, a working inner cavity surface;
1-piston rubber, 11-first annular part, 12-first conical surface, 13-second conical surface, 14-concave inclined surface, 15-first transition arc surface, 16-second transition arc surface, 17-first arc surface, 18-second arc surface, 2-piston core, 3-pressing plate, 4-snap spring and 5-O-shaped sealing ring.
Detailed Description
Examples of embodiments described in the present disclosure are illustrated in the accompanying drawings, where like reference numerals refer to the same or similar parts or parts having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; the two components can be directly connected or indirectly connected through an intermediate medium, or the two components can be communicated with each other. The specific meaning of the above terms in the present invention can be understood in specific cases for those skilled in the art.
Example 1:
referring to fig. 3, in embodiment 1, a piston assembly for a drilling pump is specifically disclosed, and the piston assembly is disposed on a working inner cavity surface of a hydraulic end of the drilling pump, and performs reciprocating motion in the working inner cavity surface through the piston assembly, so that drilling fluid in the hydraulic end of the drilling pump can be sucked and discharged in a suction end valve box and a discharge end valve box, where the piston assembly includes a piston core 2, a pressure plate 3, a piston rubber 1 and a snap spring 4, a through hole is disposed in the middle of the piston core 2, and the through hole is used for connecting a pull rod driving the piston assembly to perform reciprocating motion in the drilling pump, so as to avoid a gap between the pull rod and the piston core 2 and reduce internal pressure of the drilling pump, in this embodiment 1, the through hole is provided with an O-ring seal 5 and is used for sealing the gap between the pull rod and the piston core 2; the longitudinal section of the piston core 2 is of a T-shaped structure, the piston core 2 comprises a small-diameter sleeve joint part and a large-diameter limiting part, the piston rubber 1 adopts an annular plug structure, the piston rubber 1 is sleeved on the sleeve joint part of the piston core 2, the pressing plate 3 is arranged above the piston rubber 1, and the piston rubber 1 can be kept to be tightly attached to the limiting part of the piston core 2 through the pressing plate 3; and still be equipped with the joint groove in the piston core 2 on the portion of cup jointing, 4 gomphosis of jump ring to the joint groove on, can restrict the position of clamp plate 3 through jump ring 4.
In this embodiment 1, the piston assembly is disposed on a working inner cavity surface of the drilling pump, and the piston assembly is pulled by the pull rod to reciprocate on the working inner cavity surface, so that the drilling fluid in the drilling pump is sucked and discharged at the suction end valve box and the discharge end valve box. In order to avoid the obtuse angle formed between the piston rubber 1 and the contact surface on the working inner cavity surface, so that the piston rubber 1 is not easily pushed to cause seizure and abrasion, in this embodiment 1, the piston rubber 1 is improved to keep the acute angle formed between the piston rubber 1 and the contact surface on the working inner cavity surface during the movement process, and due to different properties of the drilling fluid, when the hydraulic end of the drilling pump pumps oil-based mud and water-based mud, the piston rubber 1 can be prepared by respectively using one of a polyurethane material, a nylon material or a rubber material according to the properties of the drilling fluid.
Example 2:
referring to fig. 4, in this embodiment 2, a piston rubber 1 is improved, and a specific improved structure is as follows: the piston rubber 1 comprises an annular piston ring, a concave inclined surface 14 which inclines towards the center is arranged at the top of the piston ring, the outer side surface of the piston ring sequentially comprises a first annular part 11 and a second annular part from bottom to top, the first annular part 11 is a cylindrical surface, and the maximum diameter position in the second annular part is tightly attached to the working inner cavity surface of the drilling pump.
Wherein the second annular part comprises a first conical surface 12 and a second conical surface 13, wherein one side of the first conical surface 12 is connected with the first annular part 11, and the other side of the first conical surface 12 is inclined away from the central position of the piston ring; one side of the second conical surface 13 is connected with the first conical surface 12, and the other side of the second conical surface 13 is connected with the outer side of the concave inclined surface 14 in the piston ring; the connecting position of the first conical surface 12 and the second conical surface 13 is tightly attached to the working inner cavity surface of the drilling pump, the included angle between the second conical surface 13 and the working inner cavity surface of the drilling pump is an acute angle, and the included angle between the first conical surface 12 and the working inner cavity surface of the drilling pump is an acute angle. After adopting above-mentioned structure, the contained angle of the plane that second annular portion was located and the work cavity face of drilling pump can remain throughout for the acute angle in this embodiment 2, and then avoids piston assembly card dun and wearing and tearing.
Example 3:
referring to fig. 5, in the present embodiment 3, a structure of the piston rubber 1 in the embodiment 2 is further improved, and the specific structure is as follows: in the present embodiment 3, the second annular portion of the piston rubber 1 still includes the first tapered surface 12 and the second tapered surface 13. Further, in this embodiment 3, in order to ensure an included angle between the piston rubber 1 and the working inner cavity surface, a first transition arc surface 15 is disposed at a connection position between the first conical surface 12 and the second conical surface 13, and the first transition arc surface 15 is in tangential connection with the first conical surface 12 and the second conical surface 13, respectively; the first transition arc surface 15 is tightly attached to the working inner cavity surface of the drilling pump, and an included angle between the upper part of the vertical extension line and the second taper surface 13 is an acute angle, and an included angle between the lower part of the vertical extension line and the first taper surface 12 is an acute angle. The structure can keep the included angle between the section of the second annular part and the working inner cavity surface of the drilling pump to be an acute angle all the time, and further avoid the piston assembly from being blocked and worn.
Example 4:
referring to fig. 6, in this embodiment 4, a structure of the piston rubber 1 in embodiment 2 is further improved, and the specific improved structure is as follows: in this embodiment 4, the second annular portion of the piston rubber 1 still includes a first tapered surface 12 and a second tapered surface 13, a second transition arc surface 16 is disposed at a connection position of the second tapered surface 13 and the concave inclined surface 14, and the second transition arc surface 16 is in tangential connection with the second tapered surface 13 and the concave inclined surface 14, respectively; one side of the second conical surface 13 is connected with the first conical surface 12, and the other side of the second conical surface 13 is connected with the outer side of the concave inclined surface 14 in the piston ring; the connecting position of the first conical surface 12 and the second conical surface 13 is tightly attached to the working inner cavity surface of the drilling pump, the included angle between the second conical surface 13 and the working inner cavity surface of the drilling pump is an acute angle, and the included angle between the first conical surface 12 and the working inner cavity surface of the drilling pump is an acute angle.
Example 5:
referring to fig. 7, in this embodiment 5, another structure is adopted for the piston rubber 1, specifically: the piston rubber 1 comprises an annular piston ring, a concave inclined surface 14 inclined towards the center is arranged at the top of the piston ring, the outer side surface of the piston ring sequentially comprises a first annular part 11 and a second annular part from bottom to top, the first annular part 11 is a cylindrical surface, and the maximum diameter position in the second annular part is tightly attached to the working inner cavity surface of the drilling pump.
In this embodiment 5, the second annular portion includes a first conical surface 12 and a first arc-shaped surface 17, one side of the first conical surface 12 is connected to the first annular portion 11, and the other side of the first conical surface 12 is inclined away from the center of the piston ring; one side edge of the first arc-shaped surface 17 is tangentially connected with the first conical surface 12, the other side edge of the first arc-shaped surface 17 is tangentially connected with the concave inclined surface 14, the first arc-shaped surface 17 is tightly attached to the working inner cavity surface of the drilling pump, and a contact position point of the first arc-shaped surface 17 is located on a vertical extension line, the upper portion of the vertical extension line and the tangent line of the first arc-shaped surface 17 form an acute angle, and the lower portion of the vertical extension line and the included angle of the first conical surface 12 form an acute angle. The structure can also keep the included angle between the section of the second annular part and the working inner cavity surface of the drilling pump to be always an acute angle.
Example 6:
referring to fig. 8, in this embodiment 6, a structure is further disclosed for the piston rubber 1, specifically: the piston rubber 1 comprises an annular piston ring, a concave inclined surface 14 which inclines towards the center is arranged at the top of the piston ring, the outer side surface of the piston ring sequentially comprises a first annular part 11 and a second annular part from bottom to top, the first annular part 11 is a cylindrical surface, and the maximum diameter position in the second annular part is tightly attached to the working inner cavity surface of the drilling pump.
In addition, in this embodiment 6, the second annular portion includes a first tapered surface 12, a first arc surface 17 and a second arc surface 18, one side of the first tapered surface 12 is connected to the first annular portion 11, and the other side of the first tapered surface 12 is inclined away from the center of the piston ring; one side edge of the first arc-shaped surface 17 is tangentially connected with the first conical surface 12, the first arc-shaped surface 17 is tightly attached to the working inner cavity surface of the drilling pump, and by using a vertical extension line where the contact position point of the first arc-shaped surface 17 is located, the included angle between the upper part of the vertical extension line and the tangent line of the first arc-shaped surface 17 is an acute angle, and the included angle between the lower part of the vertical extension line and the first conical surface 12 is an acute angle; the other side edge of the first arc-shaped surface 17 is tangentially connected with one side edge of the second arc-shaped surface 18; the other side of the second arc-shaped surface 18 is tangentially connected with the concave inclined surface 14. The structure can keep the included angle between the section where the second annular part is located and the working inner cavity surface of the drilling pump to be an acute angle all the time, avoid the piston assembly from being jammed and worn, reduce the hardness of the upper end part of the piston rubber 1 and be more beneficial to the installation of the piston rubber 1.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention in any way, and it is intended that the present invention cover modifications, equivalents and modifications by those skilled in the art, which are included in the technical spirit of the present invention.
Claims (9)
1. The piston rubber for the drilling pump is characterized by comprising an annular piston ring, wherein a concave inclined surface inclined towards the center is arranged at the top of the piston ring, the outer side surface of the piston ring sequentially comprises a first annular part and a second annular part from bottom to top, the first annular part is a cylindrical surface, the largest diameter position in the second annular part is tightly attached to the working inner cavity surface of the drilling pump, and the included angle between the plane or tangent plane where the second annular part is located and the working inner cavity surface of the drilling pump is an acute angle.
2. The piston rubber according to claim 1, wherein the second annular portion comprises a first tapered surface and a second tapered surface, wherein one side of the first tapered surface is connected with the first annular portion, and the other side of the first tapered surface is inclined away from the center of the piston ring; one side of the second conical surface is connected with the first conical surface, and the other side of the second conical surface is connected with the outer side of the concave inclined surface in the piston ring; the connecting position of the first conical surface and the second conical surface is tightly attached to the working inner cavity surface of the drilling pump, the included angle between the second conical surface and the working inner cavity surface of the drilling pump is an acute angle, and the included angle between the first conical surface and the working inner cavity surface of the drilling pump is an acute angle.
3. The piston rubber according to claim 2, wherein a first transition arc surface is arranged at a connecting position of the first conical surface and the second conical surface, and the first transition arc surface is in tangential connection with the first conical surface and the second conical surface respectively; the first transition cambered surface is tightly attached to the working inner cavity surface of the drilling pump, and the included angle between the upper part of the vertical extension line and the second conical surface is an acute angle and the included angle between the lower part of the vertical extension line and the first conical surface is an acute angle from the vertical extension line where the contact position point of the first transition cambered surface is located.
4. The piston rubber according to claim 2 or 3, wherein a second transition arc surface is arranged at the connecting position of the second conical surface and the concave inclined surface, and the second transition arc surface is in tangential connection with the second conical surface and the concave inclined surface respectively.
5. The piston rubber according to claim 1, wherein the second annular part comprises a first conical surface and a first arc-shaped surface, one side of the first conical surface is connected with the first annular part, and the other side of the first conical surface is inclined away from the center of the piston ring; first arcwall face one side is tangent with first conical surface and is connected, the opposite side of first arcwall face is tangent with the concave slope and is connected, the work cavity face of drilling pump is hugged closely to first arcwall face contact position point locates the vertical extension line, and the upper portion of vertical extension line is the acute angle with the contained angle of the tangent line of first arcwall face, and the lower part of vertical extension line is the acute angle with the contained angle of first conical surface.
6. The piston rubber according to claim 1, wherein the second annular part comprises a first conical surface, a first arc-shaped surface and a second arc-shaped surface, one side of the first conical surface is connected with the first annular part, and the other side of the first conical surface is inclined back to the center of the piston ring; one side edge of the first arc-shaped surface is tangentially connected with the first conical surface, the first arc-shaped surface is tightly attached to the working inner cavity surface of the drilling pump, and by using a vertical extension line where the contact position point of the first arc-shaped surface is located, the included angle between the upper part of the vertical extension line and the tangent line of the first arc-shaped surface is an acute angle, and the included angle between the lower part of the vertical extension line and the first conical surface is an acute angle; the other side edge of the first arc-shaped surface is tangentially connected with one side edge of the second arc-shaped surface; the other side edge of the second arc-shaped surface is tangentially connected with the concave inclined surface.
7. The piston rubber according to claim 1, wherein the piston rubber is made of a polyurethane material, a nylon material or a rubber material.
8. A piston assembly for a drilling pump, wherein a piston rubber according to any one of claims 1 to 7 is used in the piston assembly.
9. A fluid end for a drilling pump comprising a working interior cavity surface for engaging reciprocation of a piston assembly, wherein the working interior cavity surface employs a piston assembly as claimed in claim 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222457928.5U CN218177442U (en) | 2022-09-16 | 2022-09-16 | Piston rubber for drilling pump, piston assembly and hydraulic end for drilling pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222457928.5U CN218177442U (en) | 2022-09-16 | 2022-09-16 | Piston rubber for drilling pump, piston assembly and hydraulic end for drilling pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218177442U true CN218177442U (en) | 2022-12-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222457928.5U Active CN218177442U (en) | 2022-09-16 | 2022-09-16 | Piston rubber for drilling pump, piston assembly and hydraulic end for drilling pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218177442U (en) |
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- 2022-09-16 CN CN202222457928.5U patent/CN218177442U/en active Active
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