Large-particle temporary plugging agent pumping device

Abstract

The utility model discloses a large-particle temporary plugging agent pumping device. Relates to the technical field of oilfield fracturing pumps. A separation sleeve is arranged on the upper portion of the inner conical ring face of the pumping-out channel and located on a stepped hole of the central pumping-out channel, the box body is connected with an outlet seat on the upper portion of the pumping-out channel through a bolt and a sealing ring, an inner hole of the outlet seat extends downwards to form a guide sleeve, the guide sleeve is in clearance fit with the valve head, and an overflowing hole A is formed in the pipe wall of the guide sleeve. The pump-out one-way valve has the advantages that the separation sleeve is arranged on the pump-out one-way valve at the fluid end of the fracturing pump, before the valve head and the box body are closed, the separation blade of the separation sleeve makes contact with the outer circle of the valve head firstly, and large-particle temporary plugging agents on the upper portion of the separation blade are separated in the upper space of the valve head; at the moment, the valve head and the box body are not in contact sealing, high-pressure liquid at the pump outlet highly flows back in a gap between the separation blade and the valve head, and the large-particle temporary plugging agent at the lower part of the separation blade is flushed into the box body, so that the large-particle temporary plugging agent is prevented from being clamped in a one-way valve at the pump outlet.

Description

Technical Field

[0001] This utility model relates to the field of oilfield fracturing pump technology, and in particular to a pumping device for large-particle temporary plugging agents. Background Technology

[0002] Solid large-particle temporary plugging agents are typically injected in the field using a pre-fluid-carrying pump. Conventional mixing tanks are used for mixing before pumping. The hydraulic end of the fracturing pump consists of a pumping check valve and a suction check valve. When pumping large-particle temporary plugging agents, if the large particles get stuck in the sealing surfaces of the inlet and outlet check valves, it will cause suction or pumping failure, resulting in the fracturing pump running dry. Utility Model Content

[0003] To address the problem of pump jamming and inoperability when delivering large-particle temporary plugging agents in fracturing pumps, this invention provides a pumping device for large-particle temporary plugging agents, using the pump discharge check valve of a fracturing pump as an example to illustrate the solution.

[0004] The technical solution provided by this utility model is: a pumping device for large-particle temporary plugging agent, including a housing of the hydraulic end of a fracturing pump, a valve head installed in the pumping channel of the housing, the valve head being cylindrical, the lower part of the outer circle of the valve head being an outer conical annular surface structure, an inner conical annular surface machined in the lower part of the pumping channel at the valve head, the inner conical annular surface and the outer conical annular surface having the same taper, the valve head resting on the inner conical annular surface sealingly connecting to the housing, a partition sleeve provided in the upper part of the pumping channel at the inner conical annular surface, a stepped hole machined in the upper part of the pumping channel at the inner conical annular surface, the partition sleeve resting on the stepped hole of the central pumping channel, the partition sleeve and the stepped hole transition fit, the housing being connected to the outlet seat in the upper part of the pumping channel by bolts and sealing rings, a guide sleeve extending downward from the inner hole of the outlet seat, the guide sleeve and the valve head being clearance fit, and an overflow hole A being opened on the tube wall of the guide sleeve;

[0005] The upper section of the separator sleeve is inclined plane A, and the upper section of the inner hole of the separator sleeve is inclined plane B. Inclined planes A and B intersect to form an acute-angled separator blade. The separator blade of the separator sleeve is clearance-fitted with the valve head.

[0006] The pump outlet channel is threaded to a support seat at the lower part of the inner conical annular surface. The support seat is equipped with a positioning post, and a compression spring is sleeved on the outside of the positioning post. The other end of the compression spring is located at the lower part of the valve head. The support seat has a through-hole B that runs vertically through it.

[0007] The beneficial effects of this utility model are as follows: A separator sleeve is installed on the pump outlet check valve at the hydraulic end of the fracturing pump. When the valve head descends, before the valve head closes with the housing, the separator blade of the separator sleeve first contacts the outer circle of the valve head. The large particles of temporary plugging agent above the separator blade are separated in the space above the valve head. Since there is a gap between the separator blade and the valve head, there is no contact seal between the valve head and the housing at this time. The high-pressure liquid at the pump outlet flows back in the gap between the separator blade and the valve head. The large particles of temporary plugging agent below the separator blade are flushed into the housing, thereby preventing the large particles of temporary plugging agent from getting stuck in the check valve at the pump outlet. Attached Figure Description

[0008] Appendix Figure 1 This is a schematic diagram of the structure of this utility model;

[0009] Appendix Figure 2 This is a schematic diagram of the structure of the separator sleeve in this utility model;

[0010] Appendix Figure 3 This is a schematic diagram of the structure of the valve head descending through the separator sleeve in this utility model;

[0011] Appendix Figure 4 This is a schematic diagram of the structure of the valve head and the housing when closed in this utility model.

[0012] In the diagram, 1-box body, 2-pump outlet channel, 3-valve head, 4-outlet seat, 5-inner conical annular surface, 6-outer conical annular surface, 7-separator sleeve, 8-guide sleeve, 9-flow hole A, 10-support seat, 11-flow hole B, 12-positioning post, 13-step hole, 14-compression spring, 15-inclined surface A, 16-inclined surface B, 17-separator blade. Detailed Implementation

[0013] like Figures 1-4 As shown, the large particle temporary plugging agent pumping device includes a housing 1 at the hydraulic end of a fracturing pump. A valve head 3 is installed in the pump outlet channel 2 of the housing 1. The valve head 3 is cylindrical, and the lower part of the outer circle of the valve head 3 has an outer conical annular surface 6 structure. An inner conical annular surface 5 is machined on the lower part of the pump outlet channel 2 at the valve head 3. The inner conical annular surface 5 and the outer conical annular surface 6 have the same taper. The valve head 3 rests on the inner conical annular surface 5 and seals the housing 1. A partition sleeve 7 is provided on the upper part of the inner conical annular surface 5 of the pump outlet channel 2. A stepped hole 13 is machined on the upper part of the inner conical annular surface 5 of the pump outlet channel 2. The partition sleeve 7 rests on the stepped hole 13 of the pump outlet channel 2 and transitionally fits with the stepped hole 13. The housing 1 is connected to the outlet seat 4 on the upper part of the pump outlet channel 2 by bolts and sealing rings. A guide sleeve 8 extends downward from the inner hole of the outlet seat 4. The guide sleeve 8 is clearance-fitted with the valve head 3. An overflow hole A9 is opened on the pipe wall of the guide sleeve 8.

[0014] The upper section of the separator sleeve 7 is an inclined plane A15, and the upper section of the inner hole of the separator sleeve 7 is an inclined plane B16. The inclined planes A15 and B16 intersect to form an acute-angled separator blade 17. The separator blade 17 of the separator sleeve 7 is clearance-fitted with the valve head 3.

[0015] A separator sleeve 7 is installed on the pump outlet check valve at the hydraulic end of the fracturing pump. Before the valve head 3 and the housing 1 are closed, the valve head 3 descends, and the separator blade 17 of the separator sleeve 7 first contacts the outer circle of the valve head 3. The large particles of temporary plugging agent above the separator blade 17 are separated in the upper space of the valve head 3. Since there is a gap between the separator blade 17 and the valve head 3, there is no contact seal between the valve head 3 and the housing 1 at this time. The high-pressure liquid at the pump outlet flows back at the height of the gap between the separator blade 17 and the valve head 3, and the large particles of temporary plugging agent below the separator blade 17 are flushed into the housing 1, thereby preventing the large particles of temporary plugging agent from getting stuck in the check valve at the pump outlet.

[0016] A support seat 10 is threadedly connected to the lower part of the inner conical annular surface 5 of the pump outlet channel 2. A positioning post 12 is provided on the support seat 10, and a compression spring 14 is sleeved on the outside of the positioning post 12. The other end of the compression spring 14 is located at the lower part of the valve head 3. A through-hole B11 is opened on the support seat 10. The compression spring 14 can reduce the contact time and speed between the valve head 3 and the housing 1, increase the time for large-particle temporary plugging agent to flow out of the sealing annular surface, and at the same time increase the service life of the valve head 3.

Claims

1. A large particle bridging agent pumping device comprising a housing (1) of a fracturing pump fluid end, characterized in that: The valve head (3) is installed in the pump-out channel (2) of the box (1), and the valve head (3) is cylindrical, the lower part of the outer circle of the valve head (3) is in the structure of the outer conical annular surface (6), the pump-out channel (2) is processed with the inner conical annular surface (5) at the lower part of the valve head (3), the inner conical annular surface (5) and the outer conical annular surface (6) have the same taper, the valve head (3) is sealed and connected with the box (1) by falling on the inner conical annular surface (5), the pump-out channel (2) is provided with the separation sleeve (7) on the upper part of the inner conical annular surface (5), the pump-out channel (2) is processed with the stepped hole (13) on the upper part of the inner conical annular surface (5), the separation sleeve (7) falls on the stepped hole (13) of the pump-out channel (2), the separation sleeve (7) is in transition fit with the stepped hole (13), the box (1) is connected with the outlet seat (4) through bolts and sealing rings on the upper part of the pump-out channel (2), the inner hole of the outlet seat (4) extends downwardly by a guide sleeve (8), the guide sleeve (8) is in clearance fit with the valve head (3), and the pipe wall of the guide sleeve (8) is provided with the overflow hole A (9); The upper end section of the separation sleeve (7) is the inclined surface A (15), the upper end section of the inner hole of the separation sleeve (7) is the inclined surface B (16), the inclined surface A (15) and the inclined surface B (16) intersect to form an acute separation blade (17), and the separation blade (17) of the separation sleeve (7) is in clearance fit with the valve head (3).

2. The large particle bridging agent pumping apparatus of claim 1, wherein: The pump-out channel (2) is threadedly connected with a support seat (10) at the lower part of the inner conical annular surface (5), the support seat (10) is provided with the positioning column (12), the positioning column (12) is sleeved with the compression spring (14) on the outer side, the other top of the compression spring (14) abuts against the lower part of the valve head (3), and the support seat (10) is provided with the overflow hole B (11) penetrating through the upper and lower parts.

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