Progressive synchronous oil recovery method and progressive multistage synchronous oil well pump
A progressive oil well pump technology, applied in variable capacity pump components, pumps, pump components, etc., can solve the problems of long plunger running distance, large well fluid leakage, fast wear, etc., to improve pump efficiency and reduce Effects of leakage volume and shortened stroke distance
Pending Publication Date: 2017-09-29
宋丽梅
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Problems solved by technology
The disadvantage is that the plunger travels too long and wears too fast, and when the plunger is lifted in a long stroke, the matching gap between the plunger and the pump barrel is not easy to control, resulting in a large amount of well fluid leakage and low pump efficiency
Method used
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Embodiment Construction
[0022] A progressive multi-stage synchronous oil recovery method,
[0023] (1) Divide the pump barrel of the whole well into several equal-distance pump barrels with seat seals. Each pump barrel has a built-in single-stage plunger, and each single-stage plunger is connected in series with a sucker rod equipped with a check valve assembly. Suspended by the wellhead oil rope, the single-stage plunger is equipped with a pressure relief valve, which limits the amount of well fluid pumped by the single-stage plunger each time, preventing overloading of the sucker rod and the wellhead oil rope; the check valve assembly and seat seal The body is locked with a locking ring and sealed with a sealing ring;
[0024] (2) When the oil rope at the wellhead is lowered synchronously for the first time to pump the well fluid with each single-stage plunger, the single-stage plunger in the lowest pump barrel at the bottom of the well pumps the well fluid to the penultimate one above it. In the ...
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The invention belongs to an oil recovery method and device and relates to a progressive synchronous oil recovery method and progressive multistage synchronous oil well pump. The method comprises the steps that a full stroke is divided into multiple sections of equal distance, and a single stage plunger in each section of pump cylinder pumps well liquid to a wellhead in a synchronous progressive mode under the traction of an oil pumping rope. A base sealing body and couplings connect multiple single stage pump cylinders A and a downhole device, so that a pump cylinder assembly is formed; a liquid outlet sleeve is connected with a sliding sleeve, and a sealing block with an O-shaped ring arranged inside is limited between the liquid outlet sleeve and the sliding sleeve, so that a sliding plunger A is formed; a protective sleeve and a connection shaft A are arranged at the upper end of a center rod, and a fixing nut A is arranged at the lower end of the center rod; a spring, a pressure relief sleeve and the sliding plunger A are arranged on the center rod in a sleeving mode; a single stage plunger A is formed; a ball head with an anti-wear sleeve arranged inside is arranged on a valve seat and limited by the nut; a valve cover is sleeved with a lock ring and a seal ring; the sealing body is connected with a ball handle, a seal block A and a spring sleeve are arranged in a cavity of the seal body, and the seal body is connected with a nut B, so that a one-way valve assembly is formed; an oil pumping rod sleeved with the one-way valve assembly is connected with two single stage plungers A, so that a multiple stage plunger assembly is formed; the lock ring is locked with the base seal body.
Description
technical field [0001] The invention belongs to an oil recovery method and equipment, in particular to a progressive synchronous oil recovery method and a progressive multistage synchronous oil pump. Background technique [0002] At present, the oil production method of domestic ultra-long-stroke oil pumps mostly adopts the full-stroke oil production method. Under the traction of the flexible oil rope at the wellhead, the plunger of the oil well pump pulls the well fluid from the bottom of the well to the wellhead, and squeezes the well fluid into the industrial pipeline. . The disadvantage is that the plunger travels too long and wears too fast, and the gap between the plunger and the pump barrel is not easy to control during the lifting of the plunger during a long stroke, resulting in a large amount of well fluid leakage and low pump efficiency. Contents of the invention [0003] The purpose of the present invention is to provide a progressive oil recovery method and a...
Claims
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Patent Timeline
Login to View More IPC IPC(8): E21B43/00E21B43/12F04B3/00F04B47/02F04B53/14F04B53/10
CPCE21B43/126F04B3/00F04B47/02F04B53/1002F04B53/14
Inventor 魏薇张振波许瑞王珏赵建军
Owner 宋丽梅