# US 11,112,000 B2 · Lubricating system and pumping unit with lubricating system

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- Number: US 11,112,000 B2
- Document ID: US11112000B2
- Status: Granted
- Kind: B2
- Application number: 16/424,510
- Filed: 2019-05-29
- Published: 2020-05-21
- Granted: 2021-09-07
- Earliest claimed: 2018-05-30
- Assignees: Forland Services LLC
- Applicants: Forland Services LLC
- Inventors: Delin Chen
- Web page: https://patentgrep.com/patent/US11112000B2

## CPC

- F16H 57/0457: {Splash lubrication}
- F16H 57/0467: {Elements of gearings to be lubricated, cooled or heated}
- E21B 43/126: {Adaptations of down-hole pump systems powered by drives outside the borehole, e.g. by a rotary or oscillating drive (powered by fluid E21B43/129)}
- F16H 57/0404: {Lubricant filters}
- F16H 57/0427: {on rotary parts, e.g. using baffles for collecting lubricant by centrifugal force}
- F16H 57/05: of chains
- F16H: GEARING
- E21B: EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS

## Abstract

Provided are a lubricating system and a pumping unit including the lubricating system. In addition to the lubricating system, the pumping unit further includes a rack, a transmission wheel located in the rack, and a transmission conveying device cooperated with the transmission wheel. The lubricating system includes an oil pool and a roller lubrication device. A bottom of the transmission wheel is impregnated in the oil pool. The roller lubrication device is in rolling contact with the transmission conveying device. An oil return device is disposed above the oil pool and configured to collect splashing oil driven by the transmission conveying device. After the splashing oil is cleaned twice, the splashing oil flows back into the oil pool.

## Claims

### Claim 1

A lubricating system for a pumping unit, the pumping unit comprising a rack, a balancing device, a transmission wheel, and a transmission conveying device cooperated with the transmission wheel, the lubricating system comprising: an oil pool and a roller lubrication device, a bottom of the transmission wheel being impregnated in the oil pool, the roller lubrication device being in rolling contact with the transmission conveying device, wherein the lubricating system further comprises an oil return device disposed above the oil pool, wherein the oil return device is configured to collect splashing oil driven by the transmission conveying device, so as to clean the splashing oil and then allow the splashing oil to flow back into the oil pool;
wherein the oil return device is an oil spill filter device, and the splashing oil flows back into the oil pool after exceeding a set liquid level;
the lubricating system further comprise a splash collection system, the splash collection system being disposed on an upstream of an oil passage of the oil spill filter device and configured to guide the splashing oil to the oil spill filter device;
the splash collection system is a guiding device for guiding the splashing oil to the oil spill filter device;
the guiding device is a guiding plate for a top of the rack and/or a guiding plate for a top of the balance device.

### Claim 2 (depends on 1)

The lubricating system as claimed in claim 1, wherein the oil spill filter device allows the splashing oil to flow back into the oil pool after a first cleaning manner and a second cleaning manner.

### Claim 3 (depends on 2)

The lubricating system as claimed in claim 2, wherein the first cleaning manner is a precipitation manner, and the second cleaning manner is a filtration manner.

### Claim 4 (depends on 2)

The lubricating system as claimed in claim 2, wherein the oil spill filter device comprises a first cleaning device and a second cleaning device, the second cleaning device being disposed above the first cleaning device.

### Claim 5 (depends on 4)

The lubricating system as claimed in claim 4, wherein the first cleaning device is a precipitation box.

### Claim 6 (depends on 4)

The lubricating system as claimed in claim 4, wherein the second cleaning device is a filter screen.

### Claim 7 (depends on 5)

The lubricating system as claimed in claim 5, wherein the oil spill filter device further comprises a housing, the precipitation box being disposed at a bottom of the housing detachably.

### Claim 8 (depends on 5)

The lubricating system as claimed in claim 5, wherein the precipitation box comprises a box body, a magnet for attracting impurities, and a lifting device disposed at a top of the box body.

### Claim 9 (depends on 7)

The lubricating system as claimed in claim 7, wherein the second cleaning device is a filter screen, the filter screen being disposed on a side wall section of the housing, the side wall section of the housing being a bell mouth flared from top to bottom.

### Claim 10 (depends on 9)

The lubricating system as claimed in claim 9, wherein the housing comprises a first section and a second section arranged sequentially from top to bottom, the first section being a section that constricts gradually from top to bottom, the second section being a flared side wall section, and the flared side wall section being a bell mouth.

### Claim 11 (depends on 10)

The lubricating system as claimed in claim 10, wherein the housing further comprises a third section and a fourth section, the fourth section being a section carrying the precipitation box, and the third section being a transition portion of the second section and the fourth section.

### Claim 12 (depends on 6)

The lubricating system as claimed in claim 6, wherein the filter screen is a copper filter screen.

### Claim 13 (depends on 1)

The lubricating system as claimed in claim 1, wherein the roller lubrication device comprises a plurality of roller lubrication components disposed sequentially.

### Claim 14 (depends on 1)

A pumping unit, comprising the rack, a drive system for supplying power to the pumping unit, a control system for controlling the drive system, a speed reducer mounted on the rack, a transmission system fixed on the rack, and a pumping rod hanging load, wherein the pumping unit further comprises the lubricating system as claimed in claim 1.

### Claim 15 (depends on 2)

A pumping unit, comprising the rack, a drive system for supplying power to the pumping unit, a control system for controlling the drive system, a speed reducer mounted on the rack, a transmission system fixed on the rack, and a pumping rod hanging load, wherein the pumping unit further comprises the lubricating system as claimed in claim 2.