The bearing supports hydraulic downhole motor

 

The invention relates to the field of drilling equipment, namely, bearings bearings hydraulic downhole motors. The bearing supports hydraulic downhole motor includes a housing cylindrical support surfaces. The body is made detachable in the form of two outer casing having a cavity, and has an internal one-piece clip having a support ledge, and the liners-sectors. Assembly of the inner and outer ring form two annular cavity in which is placed the liners sector, preferably three in each cavity. Liners-sector is made of antifriction cast iron or carbon-ceramic alloys based on aluminum oxide, and clips are made of stainless steel. The support ledge of the inner cage is opposite the connector of the two outer clips. The technical result is to obtain a simple and reliable design angular contact ball bearing high wear resistance, with the ability to work with anomalous high temperatures, low coefficient of friction of the rubbing surfaces. 3 C.p. f-crystals, 1 Il.

The invention relates to the field of drilling equipment, specifically to the bearings using bearing, made of two bushings - steel hardened rubber and steel, one of which is clamped in the housing, and the other on the shaft. The rubber sleeve has an annular channel with ribs, through which the entire flow of washing fluid (z Shumova, I. Sobkin. Reference turbodrills. M.: Nedra, 1968).

A disadvantage of the known construction is that the rubber bushing is difficult to place in close radial clearance, an annular channel narrow it turns out, there is a pressure drop, under which the sludge is embedded in rubber and wears a steel sleeve.

The closest in technical essence and the achieved result to the proposed technical solution is the thrust bearing is a sliding bearing hydraulic downhole motor (hereinafter HDM), comprising a housing of cylindrical shape with the support surfaces. The housing has a groove for filling tires and rubber lining (see THE GOST 4671-76 type.2 S. 2 “Parts rubber and rubber feet HDM”).

The drawbacks of the prototype is a low resistance when drilling oil wells when working on the water or clay mortar with the addition of oil at temperatures up to 110With the complexity of manufacturing, the value is the summer residence of the invention is to develop a simple and reliable design of bearing bearing hydraulic downhole motor, at the same time perceiving the axial and radial loads, high wear resistance, with the possibility of working at higher abnormal (>110(C) with a lower coefficient debate of the rubbing surfaces (0,05-0,16).

The problem is solved using the characteristics listed in the first paragraph of the claims in common with the prototype, such as bearing supports hydraulic downhole motor, comprising a housing of cylindrical shape with a support surface, and a distinctive essential features such as the casing is made detachable in the form of two outer casing having a cavity and has an internal, one-piece clip having a support ledge, and the liners-sectors of antifriction material with the Assembly of the inner and outer ring form two annular cavity in which is placed the liners sector.

These conditions give the following technical result.

The embodiment of the casing of the two outer clips detachable facilitates its Assembly and disassembly, as well as mounting in the housing. The presence of cavities in the outer ring and one-piece inner race allows us to rationally place in the construction of liners sector. Execution liners from ant the morning of the shroud allows us to perceive and to redistribute the load between the bearing elements.

Usage type of material is reflected in paragraph 2 of the claims, namely, liners made of antifriction cast iron or carbon-ceramic alloys based on aluminum oxide, and clips from stainless steel.

The design of the inner cage is reflected in paragraph 3 of the claims, namely the supporting ledge of the inner cage is opposite the connector of the two outer clips.

The preferred quantity of sacks is reflected in paragraph 4 of the claims, namely in each cavity of the outer casing preferably placed in three of the liner sector.

The invention is illustrated in the drawing.

The bearing consists of a outer 1 and inner 2 clips, which placed six pie liners 3 of antifriction material. The inner ferrule 2 whole, has two support surfaces 4 for axial loads and the two surfaces 5 for radial loads. The inner cage is mounted on the spindle shaft (not shown) and is fastened by a compressing force on the end surfaces of the tightness of the threaded connection and thus rotates with the shaft of the spindle. Outer ring 1, detachable, and is the recipient of the radial load. Outer ring 1 is mounted in the spindle body (not shown) due to the tightness of the thread compression but furnacemen surfaces and fixed but against the casing. Assembly of the inner 2 and outer 1 clip form two annular cavities, which are placed in the sector liners 3 of 3 pieces in each cavity or 6 pieces in one bearing. In the drawing: D is the diameter of the bearing body; d is the diameter of the bearing on the spindle shaft of HDM.

The bearing operates in the following way. Outer spring 1 is mounted stationary in the housing of the spindle HDM, and the inner ring 2 is fixed on the shaft of the spindle HDM.

Clip the outer 1 and inner 2 Assembly form a cavity in which is placed liners-sector 3.

Weight on bit (not shown) is transmitted through the inner ring 2 of the spindle shaft HDM on liners 3 the outer ring 1 through the friction surfaces 4, 6, fixedly mounted in the case: radial load on the shaft is transmitted to the housing 1 via the inner ring 2 on the liners 3 through the friction surface 5, 7.

The wear resistance of the bearings of this design, depending on the material of the liners-sectors, according to calculations and conducted tests of 300 hours or more. Due to its univariant the bearing design greatly simplifies the design of the spindle HDM in General, improves maintainability.

Claims

1. The bearing supports hydraulic downhole motor, comprising a housing of cylindrical shape with a support surface, wherein the body is made detachable in the form of two outer casing having a cavity, and has an internal one-piece clip having a support ledge, and the liners-sectors of antifriction material with the Assembly of the inner and outer ring form two annular cavity in which is placed the liners sector.

2. Bearing on p. 1, characterized in that the inserts are made of antifriction cast iron or carbon-ceramic alloys based on aluminum oxide, and clips are made of stainless steel.

3. Bearing on p. 1, characterized in that the supporting ledge of the inner cage is opposite the connector of the two outer clips.

4. The bearing under item 1 or 2, characterized in that each cavity of the outer casing preferably placed in three of the liner sector.

 

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