DE1056075B - Device on conical roller chisels to protect against the ingress of flushing water into the roller and ball bearings - Google Patents

Description

GERMAN

In deep drilling technology, especially when drilling for crude oil, m the whole world after the conventional Rotaryverfahreti and recently also with the newly developed turbine drills so-called Conical roller chisel used.

Alk these cone roller chisels suffer from the serious disadvantage that the bearing becomes unusable in a relatively short time and has to be replaced due to the penetration of the rinsing water mixed with the smallest earthy parts into the roller and ball bearings of the roller cone. Like a sandblasting blower, the rinsing water mixed with the smallest earthy parts has an emery effect ¹ , which makes the best quality roller and ball bearings temporarily unusable. In deep drilling technology, especially after oil, this process is technically and time-wise one of the greatest evils.

The technical task to eliminate this deficiency is therefore: roller and ball bearings of the To keep the roll cage free from the ingress of rinsing water.

The further explanations are based on the exemplary embodiments shown in the figures;

Fig. 1 shows part of a conical roller bit,

Fig. 2 and 3 details on an enlarged scale.

The cone roller chisel has three or more shoulders a, in which an existing axis b is attached, around which the roller cone c rotates with an internal roller and ball bearing. In Fig. 1 only one shoulder with axis and roller cone is shown.

In shoulder α and in axis b a water guide channel or water guide pipe d is already cast when the shoulder α and axis b are made.

The space e between the surfaces of the shoulder α and the rotating roller cone c is about 3 mm. The axis b is exposed between these two surfaces, it is exposed to the dirty washing water, and the washing water can penetrate between the surfaces to the roller and ball bearings in the roller cone c.

In this exposed part of the axis b , four, five or six radially extending holes / to the water duct d are drilled from the outer axis wall, depending on the diameter of the axis b to be used, which accommodate hard metal round nozzles or slot nozzles of about 2 mm in diameter.

Depending on the shape of the nozzle hole, the nozzles inject a flat or conical water wall g against the device in the space e through the water duct d with a high pressure effect. Conical roller chisels

to protect against penetration

of rinse water into the rollers »

and ball bearings

Applicant:

Albert C. June,

Bad Elisen (Ndsa.), Friedrichstr. 25th

Albert C. Juni, Bad Elisen (Ndsa.),
has been named as the inventor

urgent soiled rinse water and thereby keep the exposed critical part of the axis 5 in the space e free from the soiled rinse water.

This shielding water wall g comes about because the pressurized water coming from above has a higher pressure effect at the entry point h of the water duct d at the starting point of the nozzle holes f than at the entry point h. By means of special nozzles (e.g. according to Laval) this higher pressure effect is promoted compared to the general water pressure.

If, for special constructions, the exposed part of the axis b is to be made longer and the space e is increased as a result, several rows of radially extending holes can be arranged one behind the other, depending on the technical possibilities (see Fig. 2 and 3). With this arrangement there is an additional possibility, the critical one

4-5 to protect the entry point of axis b to roller and ball bearing i from the dirty rinsing water. The lowest row of holes k is drilled at an angle, and a pointed cone / is inserted into the lowest part of the water duct d and a short screen m tapering towards the outer edge is attached around the axis b. This gives the shielding water wall g the parabolic shape n. The surface of the shoulder α to the roller cone c is constructed in the shape of a bell in this case. The bell-shaped

909 508/69 '

Claims (2)

The surface of the shoulder α is led down so far at the edge that the distance to the roller cone c, as usual, is only about 3 mm, so that no larger pieces of soil with the rinsing water can penetrate into the space e. This protective arrangement 'can be used with all conical roller bits used in deep drilling technology. The main progress is that these conical roller bits only have to be replaced by the protective arrangement after a considerably longer period of time than before. If the replacement now averages around 60 hours, then the newly achieved efficiency should now be around 10O1 hours, probably even higher. Theoretically, an increase in performance of at least 60% should initially be assumed. The decisive high drilling costs in deep drilling technology are caused by the constant replacement of the conical roller bits. The drilling process is considerably shortened in terms of time due to a significant increase in the performance of the conical roller chisel, which can be used for a longer period of time, which in turn results in substantial material savings. PATENT KITCHEN: 1. Device on conical chisels to protect against the ingress of flushing water into the roller and ball bearings, characterized in that a water duct in the chisel shoulder (ß) and in the axis (b) of the rollers (c) is provided, which is in the exposed part (e) the barrel axis (b) between the chisel shoulder (α) and the back of the roller from the water duct (d) of the barrel axis Q)) has radially extending holes (/) with spray nozzles. 2. Device according to claim 1, characterized in that that with a large distance between the exposed part of the barrel axis between the chisel shoulder and roll back several rows of holes arranged one behind the other with spray nozzles for Water duct of the barrel axis are arranged, the bottom row of holes running obliquely and is provided with a short water guide screen placed around the barrel axis, and in the end of the water duct of the barrel axis a pointed cone is used, the shoulder surface is bell-shaped opposite the roller cone back. 1 sheet of drawings © 909 503/69