Plug and valve integrated cone valve pump with combined type movable and fixed three cylinders and two spiral centralizers

Patent metadata

Field	Value
Publication number	US-11434702-B2
Application number	US-202117142261-A
Country	US
Kind code	B2
Filing date	Jan 6, 2021
Priority date	Apr 15, 2020
Publication date	Sep 6, 2022
Grant date	Sep 6, 2022

Abstract

The present invention relates to a plug and valve integrated cone valve pump with combined type movable and fixed three cylinders and two spiral centralizers, which is applied to suction working conditions in highly deviated well sections. It comprises three pump cylinders, which are combined type including two fixed cylinders and a dynamic cylinder, two centralizers, which are combined type including a dynamic spiral centralizer and fixed spiral centralizer, a fixed cone valve, a cylinder and plug integrated springing fixed cone valve, a fixed plunger and a movable guide rod cone valve to solve the problems such as stuck pump, eccentric wear between plunger and pump cylinder and valve leakage.

First claim

The invention claimed is:

1. An integral three-cylinder cone valve pump, comprising a three-cylinder body, a spring-loaded stationary cone valve, a stationary plunger body, a guide rod movable cone valve, a dual-movable-and-stationary-spiral-bodies centralizer, and a central rod;
wherein the three-cylinder body comprises an outer stationary pump cylinder, an intermediate movable pump cylinder, and an inner stationary pump cylinder that are coaxially disposed sequentially from outside to inside, wherein the guide rod movable cone valve and the dual-movable-and-stationary-spiral-bodies centralizer are disposed inside a cylinder cavity of the outer stationary pump cylinder sequentially from top to bottom; wherein the intermediate movable pump cylinder is connected to a bottom of the central rod through the guide rod movable cone valve, allowing the guide rod movable cone valve and the dual-movable-and-stationary-spiral-bodies centralizer to reciprocate up and down along with the central rod; wherein the spring-loaded stationary cone valve and the stationary plunger body are disposed inside a cylinder cavity of the intermediate movable pump cylinder sequentially from up to bottom; the spring-loaded stationary cone valve and the stationary plunger body are integrally formed and they are connected together to the inner stationary pump cylinder; wherein the outer stationary pump cylinder and the inner stationary pump cylinder are fixedly connected together at a bottom of a tubing string through a pump cylinder coupling; wherein a base portion of the pump cylinder coupling defines a coupling guide round hole and a desilting annular groove that are positioned radially from inside to outside;
wherein the spring-loaded stationary cone valve comprises a stationary cone valve guide rod, a flow guide centering plate, a stationary cone valve hood, a stationary cone valve spring, and a stationary cone valve body, and a stationary cone valve seat,
wherein outer peripheral surface of the stationary cone valve body comprises a lower spring clamping slot and a stationary valve body sealing surface sequentially from top to bottom, wherein an inner wall of an annular cavity of the stationary cone valve seat comprises a stationary valve seat sealing surface and a stationary valve hole along an axial direction sequentially from top to bottom, wherein the stationary cone valve body and the stationary cone valve seat match with each other and operate in conjunction, wherein a stationary cone valve sealing annular band is formed between the stationary valve body sealing surface and the stationary valve seat sealing surface, wherein a base portion of the stationary cone valve hood defines an upper spring clamping slot, and the stationary cone valve spring is arranged between the upper spring clamping slot and the lower spring clamping slot; wherein the spring-loaded stationary cone valve realizes axial alignment through a stationary cone valve seat cavity of the stationary cone valve hood and the inner stationary pump cylinder;
wherein the stationary cone valve guide rod comprises a stationary rod cover, a stationary rod body, and a stationary rod joint that are disposed along an axial direction sequentially from top to bottom, wherein the stationary rod joint connected the stationary cone valve guide rod and the stationary cone valve body together through a thread, wherein the stationary rod body passes through the flow guide centering plate and the stationary cone valve hood to form a dual valve cylinder moving pair between the flow guide centering plate and the stationary cone valve hood;
wherein the flow guide centering plate is disposed in a cylinder cavity of the intermediate movable pump cylinder and forms a single plate cylinder moving pair between inner walls of the intermediate movable pump cylinder, wherein a central part of the flow guide centering plate is drilled with a round hole and wherein arched guide holes are provided surrounding the flow guide centering plate and are circumferentially and uniformly distributed;
wherein the stationary cone valve guide rod and the stationary cone valve spring operate in conjunction to facilitate the opening and closing of the stationary cone valve body;
wherein the stationary cone valve body is fixed to and sleeved on the inner stationary pump cylinder, wherein the stationary plunger body comprises a fixed plunger and an anti-wear ring, wherein an outer peripheral surface of the fixed plunger comprises a plunger capturing conical surface and at least one anti-wear groove that are sequentially disposed from top to bottom along an axial direction, wherein the at least one anti-wear groove is inlaid with an anti-wear ring, wherein an annular clearance is defined between the fixed plunger and the intermediate movable ump cylinder, and matching to a layered cylinder surface moving pair;
wherein the guide rod movable cone valve comprises a movable cone valve body, a movable cone valve seat, a movable cone valve cover, and a vale movable cone valve guide rod, wherein an outer peripheral surface of the movable cone valve body comprises movable valve body sealing surface, wherein an inner wall of an annular cavity of the movable cone valve seat comprises a movable valve seat sealing surface and a movable valve hole that are sequentially positioned from top to bottom along an axial direction, wherein a movable cone valve sealing annular band is formed between the movable valve body sealing surface and the movable valve seat sealing surface, wherein the guide rod movable cone valve is disposed inside a movable cone valve seat cavity of the movable cone valve cover, wherein an upper portion of the movable cone valve guide rod is threadedly connected with the movable cone valve cover, and a lower portion of the movable cone valve guide rod passes through the movable cone valve body to form a single valve cylinder moving pair with the movable cone valve body; wherein the guide rod movable cone valve is connected with the intermediate movable pump cylinder through the movable cone valve cover, and wherein the movable cone valve cover comprises a movable valve guide cavity and a movable valve cover hole intercommunicated with each other;
wherein the guide rod movable cone valve is driven to operate and stop operating by a guiding action of the movable cone valve guide rod;
wherein the dual-moveable-and-stationary-spiral-bodies centralizer comprises an upper movable spiral body, a lower stationary spiral body, a upper movable spiral body limiting collar, and a lower movable spiral body centering coupling; wherein the upper movable spiral body is a rotary spiral tooth impeller consisting of an upper spiral tooth body and an upper centering base tube; the lower stationary spiral body is a stationary spiral tooth impeller consisting of a lower spiral tooth body and a lower centering base tube; wherein a tooth pitch of spiral teeth of the upper spiral tooth body gradually decreases from bottom to top along the respective tooth line, and a cross-sectional area of a lower spiral tooth gap between spiral teeth of the lower spiral tooth body gradually decreases from bottom to top along the respective tooth line;
wherein a stable liquid film is disposed between a tooth top surface of the lower spiral tooth body and an inner cylinder wall of the outer stationary pump cylinder; wherein a dynamic pressure liquid film is disposed between the upper movable spiral body and the outer stationary pump cylinder;
wherein a lower end of the of the lower centering base tube of the lower stationary spiral body comprises a centering capturing conical surface which matches with the plunger capturing conical surface of the fixed plunger, realizing quick down-hole docking between the dual-movable-and-stationary-spiral-bodies centralizer and the stationary plunger body; wherein a spiral tooth top surface of the lower spiral tooth b

Assignees

• Univ Qingdao Technology

Inventors

• Liu Xinfu
• Liu Chunhua
• Zhou Chao
• Wu Jianjun
• Gao Peng
• Zhang Shousen

Classifications

• F04B53/10

  Valves; Arrangement of valves · CPC title

• F04B47/02 Primary

  the driving mechanisms being situated at ground level (F04B47/12 takes precedence) · CPC title

• E21B43/126

  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) · CPC title

• F04B53/16

  Casings; Cylinders; Cylinder liners or heads; Fluid connections · CPC title

• E21B34/08

  responsive to flow or pressure of the fluid obtained (E21B34/10 takes precedence) · CPC title