CN205252657U - Low pressure slurry filter for bore hole pump - Google Patents

Abstract

The utility model discloses a low-pressure mud filter for a drilling pump, which comprises a filter cylinder, a cavity is arranged radially in the filter cylinder, a cylindrical filter core is arranged in the cavity, and one end of the cavity is Sealed and fixed bottom cover, the other end of the cavity is provided with a filter gland; a positioning stud is fixedly installed in the blind hole inside the bottom cover, and the other end of the positioning stud passes through the cartridge filter element in turn and extends out of the filter net Gland; a compression nut is set on the outer end thread of the positioning stud, and a rotating handle is installed on the compression nut; a through hole is radially opened on the wall of the cavity close to the bottom cover, and a sewage drain is installed outside the through hole. gate. The utility model has the advantages of simple structure, reliable operation, good filtering effect and convenient operation.

Description

Low-pressure mud filter for drilling pump

technical field

The utility model belongs to the technical field of oil and gas exploration equipment, and relates to a low-pressure mud filter for a drilling pump.

Background technique

The pipeline connecting the drilling pump and the mud tank or mud pool is called the suction manifold. Since the mud tank or mud pool is open, there are often some large particles in the tank or pool, and these sundries will affect the components of the drilling pump. Therefore, the suction manifold must usually be equipped with a low-pressure mud filter to filter the drilling fluid to prevent large particles of impurities from entering the drilling pump and damaging the equipment. When the mud filter is clogged, it will affect the water supply performance of the drilling pump, and even cause the drilling pump to fail to work normally. In order not to affect the work of the drilling pump, the low-pressure mud filter must be cleaned quickly, which requires the low-pressure mud filter to be fast and easy to clean. specialty.

At present, plate-type low-pressure mud filters are used in oil field work sites. The filter element is a mesh plate structure. The low-pressure mud filter is installed on the suction pipeline of the drilling pump according to the direction of the liquid flow indicator. When working, the drilling fluid flows into the filter cylinder, and the filtered drilling fluid enters the drilling pump, and the particles and debris larger than the mesh are blocked in the large cylinder of the low-pressure mud filter and cannot enter the drilling pump. Large particles and sundries remain in the filter cylinder. When the large particles and sundries accumulate to a certain amount, the suction performance of the drilling pump will be affected. At this time, the mud filter must be cleaned.

The existing cleaning method is to first loosen the compression nut on the filter gland, and then take out the filter element as a whole. At the same time, the liquid flow is inconvenient to clean when washing the sludge at the bottom of the cylinder, which is time-consuming and laborious, and the operation is extremely inconvenient. Since it is manually salvaged, the sundries are mixed with the drilling fluid, making it difficult to clean them up. In addition, due to structural limitations, there is a gap between the filter element and the filter cylinder, resulting in poor sealing effect during mud filtration, which affects the work of the drilling pump.

Utility model content

The purpose of the utility model is to provide a low-pressure mud filter for drilling pumps, which solves the problems in the prior art that the filter device is complicated to disassemble, the filtering effect is not ideal, the cleaning is not thorough, and the work of the drilling pump is easily affected.

The technical solution adopted by the utility model is that a low-pressure mud filter for drilling pumps includes a filter cylinder, and a cavity is arranged radially in the filter cylinder, and a cylindrical filter element is arranged in the cavity. One end of the cavity is a sealed and fixed bottom cover, and the other end of the cavity is provided with a filter gland; a positioning stud is fixedly installed in the blind hole inside the bottom cover, and the other end of the positioning stud passes through the cartridge filter element in turn Extend out the filter net gland; the outer end of the positioning stud is threaded with a compression nut, and a rotating handle is installed on the compression nut; a through hole is radially opened on the wall of the cavity close to the bottom cover, and the through hole There is a sewage gate valve installed outside.

The low-pressure mud filter for drilling pumps of the present utility model is also characterized in that:

An O-ring is provided at the contact position between the cylindrical filter element and the axial hole of the filter screen gland.

The structure of the cartridge filter element is that it includes the filter cartridge of the outer ring and the filter screen inside. There is a central hole in the center of the filter screen to pass through the positioning stud. The wall of the filter cartridge is drilled with evenly distributed fine holes. Two positioning strips are symmetrically arranged on the outer peripheral surface along the diameter, and the positioning strips are fixed on the outer peripheral surface of the filter cartridge in the axial direction, and the two positioning strips are slidingly socketed with the two guide grooves arranged on the inner surface of the cavity.

A handle is fixedly installed on the operating end of the filter cartridge, an inlet is opened in the direction of the filter cartridge toward the mud inlet, and a support block is arranged at the bottom of the filter cartridge.

The beneficial effect of the utility model is that, when the drilling fluid passes through the filter core, particles and sundries larger than the mesh are completely blocked in the filter core by the cylindrical low-pressure mud filter, and the filtering effect is good. When the filter element is blocked and needs to be cleaned, the sundries are lifted out at the same time after the filter element is lifted, which is easy to clean. At the same time, the sludge and impurities deposited at the bottom of the cylinder can be washed and discharged through the gate valve, which solves the problems of poor filtering effect and difficult on-site operation in the prior art.

Description of drawings

Fig. 1 is the axial sectional structure schematic diagram of the utility model;

Fig. 2 is a top view schematic diagram of the utility model;

Fig. 3 is a C-C sectional view in Fig. 1;

Fig. 4 is a schematic view of the filter core structure (front view) in the utility model;

Fig. 5 is a structural schematic view (top view) of the filter element in the present invention.

In the figure, 1. Filter cylinder, 2. Filter element, 3. Compression nut, 4. O-ring, 5. Positioning stud, 8. Filter gland, 10. Filter cartridge, 11. Sewage gate valve, 12 .Positioning bar, 13. Handle, 14. Import port, 15. Support block.

detailed description

The utility model will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

Referring to Fig. 1, Fig. 2, Fig. 3, the structure of the present utility model is that it includes a filter cylinder 1 which is docked front and back with the suction pipeline of the drilling pump, and a cavity is radially arranged in the filter cylinder 1, and the cavity A cylindrical filter element 2 is arranged inside, one end of the cavity is a sealed and fixed bottom cover, the other end of the cavity is provided with a filter gland 8, and a positioning stud 5 is fixedly installed in the blind hole inside the bottom cover, The other end of the positioning stud 5 passes through the cylindrical filter element 2 in turn and then extends out of the filter gland 8 (the positioning stud 5 and the filter gland 8 are in smooth contact), and the axis between the cylindrical filter element 2 and the filter gland 8 An O-ring 4 is provided at the contact position of the hole; a compression nut 3 is set on the outer thread of the positioning stud 5, and a rotating handle is installed on the compression nut 3, and the filter gland 8 can be tightly closed by rotating the compression nut 3 And compress the cylindrical filter element 2; a through hole is radially opened on the wall of the cavity close to the bottom cover, and a sewage gate valve 11 is installed outside the through hole.

Referring to Fig. 4 and Fig. 5, the structure of the cartridge filter element 2 is that the filter cartridge 10 including the outer ring and the filter screen inside are provided with a central hole in the axis of the filter screen for passing through the positioning stud 5, and the wall of the filter cartridge 10 is There are evenly distributed pores on the top, and two positioning strips 12 are symmetrically arranged on the outer peripheral surface of the filter cartridge 10 along the diameter. The two guide grooves on the surface correspond to sliding sleeves; a handle 13 is fixedly installed on the operating end of the filter cartridge 10 (two handles 13 in the embodiment of Figure 5), and the direction of the filter cartridge 10 toward the mud inlet (incoming liquid direction) ) has an inlet 14, and a support block 15 is provided at the bottom end of the filter cartridge 10.

The body and the bottom of the filter cartridge 10 are drilled with fine holes for filtering.

The utility model installs the low-pressure mud filter on the suction pipeline of the drilling pump according to the direction of the inlet and outlet, which can completely block and store the large particles of impurities in the cartridge filter element 2, and play a role of dressing when cleaning. The difference from the existing plate-type low-pressure mud filter is that: the structure of the filter element 2 is improved; the sewage gate valve 11 used for cleaning is added.

The working principle of the present utility model is,

1) During operation, the drilling fluid flows into the filter cylinder 1 through the inlet 14, and after passing through the filter cylinder 10, the filtered drilling fluid enters the drilling pump, while large particles and debris remain in the cartridge filter element 2. When large particles and debris accumulate to a certain amount, the suction performance of the drilling pump will be affected, and the filter cylinder 1 must be cleaned at this time. First unscrew the compression nut 3 on the filter gland 8, then take out the cartridge filter element 2 and the sundries left in it as a whole, pour out the large particles and sundries and clean all parts of the filter cartridge 10; Impurities and sludge deposited at the bottom of the cavity of the filter cylinder 1 can be washed and discharged through the sewage gate valve 11.

2) The cleaned filter cartridge 10 is reinstalled in the filter cartridge 1 according to the following steps:

Orient the inlet 14 towards the mud inlet side, align the two positioning strips 12 in the guide grooves on the inner surface of the cavity, and sit on the bottom cover of the cavity, install the O-ring 4 and the filter Gland 8 and compression nut 3, and tighten the compression nut 3 to get final product.

The low-pressure mud filter structure of the utility model adopts a cylindrical filter element and a sewage gate valve structure, which has a simple structure, a long service life, and a good filtering effect; the disassembly speed is fast, the cleaning and replacement of the filter element is convenient, and the cleaning is simple and thorough; the drilling site is easy to operate, Greatly reduce the labor intensity of workers.

Claims (4)

1. a drilling pump low pressure slurry filter, it is characterized in that: comprise filtration barrel body (1), in filtration barrel body (1), be disposed radially a cavity, in this cavity, be provided with a cylindrical filter cartridge (2), this cavity one end is the fixing bottom of sealing, and this cavity other end is provided with screen pack gland (8); In the blind hole of bottom inner side, be installed with a positioning stud (5), positioning stud (5) other end stretches out screen pack gland (8) through after cylindrical filter cartridge (2) successively; In positioning stud (5) outer end, thread bush is equipped with clamp nut (3), and clamp nut is provided with rotating handles on (3); Radially have a through hole at this cavity near the wall of bottom, through hole is provided with a blowoff gate valve (11) outward.

2. drilling pump according to claim 1 low pressure slurry filter, is characterized in that: described cylindrical filter cartridge (2) is provided with O RunddichtringO (4) with screen pack gland (8) axle center hole contact position.

3. drilling pump according to claim 1 low pressure slurry filter, it is characterized in that: the structure of described cylindrical filter cartridge (2) is, comprise filter cylinder (10) and the inner screen pack of outer ring, have centre bore in screen pack axle center for passing positioning stud (5), on filter cylinder (10) wall, be drilled with uniform pore, filter cylinder (10) outer surface is provided with two positioning strips (12) along diameter symmetry, positioning strip (12) is fixed on filter cylinder (10) outer surface vertically, two positioning strips (12) and two corresponding being slidably socketed of guide groove that are arranged on cavity inner surface.

4. drilling pump according to claim 3 low pressure slurry filter, it is characterized in that: the operating side of described filter cylinder (10) is installed with handle (13), have introducing port (14) at filter cylinder (10) towards the direction of mud entrance, be provided with back-up block (15) in filter cylinder (10) bottom.