Negative pressure oil-well pump

An oil well pump and negative pressure technology, which is applied in the field of oil well pump development, can solve the problems of low oil production efficiency, achieve the effects of improving oil production efficiency, reducing uplink load, and improving efficiency

Active Publication Date: 2006-02-08
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Overcome the defects existing in the existing oil w

Method used

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  • Negative pressure oil-well pump

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Embodiment 1: see attached image 3 . The lower fixed valves all adopt the prior art, and are not described in detail. The lower fixed valve includes a lower fixed valve joint (1), a lower fixed valve seat (2), a lower fixed valve ball (3) and a lower fixed valve cover (4). Fix the upper end of the valve and connect the pump barrel (6) with threads. Pump cylinder (6) internal diameter is 80 millimeters, and length is 3500 millimeters. Piston (7) is arranged in the pump cylinder (6), and piston (7) outer diameter is 80 millimeters, and slide fits between piston (7) and pump cylinder (6). Swimming valve (5) is arranged in the piston (7). The upper end of the piston (7) is connected with the plunger (8). The plunger (8) profile is cylindrical, with a diameter of 50 millimeters and a length of 4000 millimeters. The top of the pump barrel (6) is connected to the central pipe (10) by a connecting sleeve (9) with threads at both ends. The lower end of the connecting sle...

Embodiment 2

[0015] Embodiment 2: see attached image 3 . Substantially the same as embodiment 1, the difference is: the annular fixed valve (17) is an annular one-way ball valve. That is, there are 2-6 ball valves distributed on the inner circumference of the ring-shaped fixed all (17). Present embodiment 2 adopts 4 ball valves.

[0016] A brief description of the working process of the negative pressure oil well pump of the present invention is helpful for understanding the present invention.

[0017] See attached figure 2 . During the upstroke, the plunger (8) and the piston (7) move upward simultaneously. The ring-shaped fixed valve (17) is opened under the action of the liquid pressure and the friction of the plunger (8), the channel of the ring-shaped fixed valve (17) is opened, and the liquid between the piston (7) and the ring-shaped fixed valve (17) enters the ring Above the fixed valve (17); at the same time, a negative pressure zone is formed between the piston (7) and th...

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Abstract

The negative pressure oil well pump as one sucker rod pumping equipment consists of fixed valve, traveling valve and pump barrel, and features that the plunger has upper part penetrating the central hole of the annular fixed valve mounted and lower part connected to the piston with inside traveling valve and one negative pressure cavity is formed between the traveling valve and the annular fixed valve. The present invention has the positive effects of double negative pressure area oil pumping resulting in reduced effect of gap ratio on pump efficiency and raised oil pumping efficiency; lowered liquid column pressure the plunger bears and up load of the oil well pump; and increased production pressure difference. The present invention provides improved negative pressure oil well pump structure and introduces double negative pressure area concept for oil well pump.

Description

Technical field [0001] The invention relates to an oil field development oil well pump, in particular to a deep well rod oil well pump used in mechanical oil recovery. Background technique [0002] Use oil pump to extract oil. Rod pump oil extraction is a more commonly used oil extraction method in oilfields at home and abroad. Rod pumps include: rod well pumps, tube well pumps. For example, Chinese Patent Publication No. 1556327 provides a double-cavity oil well pump, in order to separately pump the oil of two oil layers, avoid interference between the two oil layers, and extract oil from each layer respectively. Another example is Chinese patent announcement No. 1018279, which provides a suspended fixed oil well pump, in order to realize oil production in deep wells, and reduce the gravity that the oil well pump bears. Chinese Patent Publication No. 1128929 provides a metal elastic seal oil well pump. These are rod well pumps, each with its own characteristics. Genera...

Claims

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Application Information

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IPC IPC(8): F04B47/02E21B43/00
Inventor 陈新志李培俊张绍鹏谢建勇顾明祥
Owner PETROCHINA CO LTD
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