CN201031791Y

CN201031791Y - Equal-diameter strong start and stop oil-well pump

Info

Publication number: CN201031791Y
Application number: CNU2007200120193U
Authority: CN
Inventors: 周毅; 庞琦波
Original assignee: Panjin Liaoyou Chenyu Group Co Ltd Guangda Petroleum Machine Factory
Current assignee: Panjin Liaoyou Chenyu Group Co Ltd Guangda Petroleum Machine Factory
Priority date: 2007-05-10
Filing date: 2007-05-10
Publication date: 2008-03-05
Anticipated expiration: 2017-05-10

Abstract

An isometric forced on-and-off defueling pump used in oilfield mechanical oil extraction includes a protection cap, a pump barrel hoop, a pump barrel, a piston assembly consisting of an upper delivery valve cover, a spring, a spring base, a valve ball, a valve base, a valve base retaining ring, a piston body, a lower flow valve cover and a lower floating valve base connector, as well as a fixed valve assembly consisting of a fixed valve cover, a spring, a spring base, a fixed valve ball, a fixed valve base and a fixed valve base connector. The protection cap, the pump barrel hoop and the fixed valve assembly are connected by screw thread; the piston assembly is arranged in the pump barrel; the pump barrel hoop is connected with the screw thread of the pump barrel; the piston spring, the piston spring base and the valve ball are arranged in the upper delivery valve cover; the valve base is pressed and sealed by the valve cover and the valve base retaining ring; the valve base retaining ring and the lower flow valve cover are arranged in the piston body; the piston body is connected with the lower floating valve base connector by screw thread; the spring, the spring base and the fixed valve ball are arranged in the fixed valve cover. The utility model solves the problem of the prior technology such as the closure lag of valve ball and floating valve ball, which is applied in the oilfield mechanical oil extraction.

Description

Isometrical strong keying oil well pump

Technical field:

The utility model relates to the isometrical strong keying oil well pump that a kind of oil field machinery oil is used.

Background technique:

The oil well pump that oil field machinery oil is commonly used is common oil well pump at present, at the bottom of this pump generally is placed on pumping unit bottom and connects the back lower going-into-well with sucker rod, the subject matter that common oil well pump exists is that valve ball drifts about in valve bonnet and influences the valve ball rate of descent, pump efficiency is low, valve ball can not directedly move, in thick oil horizontal well, inclined shaft, can not normally use, influence oil recovery amount.

The model utility content:

The utility model purpose is to provide a kind of isometrical strong keying oil well pump, solved the valve ball that exists in the prior art and drifted about in valve bonnet and influence the valve ball rate of descent, pump efficiency is low, and valve ball can not directedly move, in thick oil horizontal well, inclined shaft, can not normally use, influence the problem of oil recovery amount.

The technological scheme that its technical problem that solves the utility model adopts is: isometrical strong keying oil well pump is made up of helmet, pump barrel box cupling, pump barrel, plunger piston assembly, standing valve assembly; Plunger piston assembly: go up oil-release valve cover, piston spring, piston spring seat, valve ball, valve seat, valve seat back-up ring, plunger body, current downflow valve bonnet, lower travelling valve seated connection head composition; The standing valve assembly: standing valve cover, spring, spring seat, fixed valve ball, fixed valve base, fixed valve base joint are formed; Helmet is connected with standing valve assembly tapered thread with pump barrel box cupling, pump barrel box cupling, and plunger piston assembly is packed in the pump barrel, and the pump barrel box cupling is connected with the pump barrel cylindrical thread; In plunger piston assembly: pack into piston spring in the piston spring seat and it is packed into and go up in oil-release valve cover, valve ball is packed in the valve seat, valve seat uses oil-release valve cover and the valve seat back-up ring compresses sealing, and valve seat back-up ring and current downflow valve bonnet are put into plunger body, and plunger body is threaded with the current downflow valve base joint; In the standing valve assembly: pack into spring seat and fixed valve ball of spring together put into standing valve cover, and fixed valve base is squeezed in the standing valve cover with the fixed valve base joint.During plunger piston assembly work, in last oil-release valve cover, place return spring and use the valve ball valve to close rapidly; Last oil-release valve cover and lower travelling valve cover all adopt the streamlined oil discharge passage more than three or three, and guiding rib is arranged all, then reduced the drift of valve ball, it also can normally be used in inclined shaft, horizontal well has avoided common oil well pump valve ball in inclined shaft, horizontal well to be not closed completely the problem that pump efficiency is low; The plunger body total length all adopts same size, and the top employing is strike-off and washed away structure, and sand grains can not be entered between pump barrel and the plunger, can prevent the sand card and pull; Because the plunger body total length is isometrical, the corresponding seal section that prolonged has improved the crude oil leakage that sealability between plunger and the pump barrel has reduced plunger upper part; Plunger successfully enters in the pump barrel when being provided with one section guiding surface going into the well on lower travelling valve seated connection head; The standing valve assembly has reduced the drift of fixed valve ball owing to be provided with guiding rib and spring positive closing, and it also can normally be used in inclined shaft, horizontal well.

The new beneficial effect of this practicality is, this pump structure is simple, and the pump efficiency height has gas-tight sand control card effect, applied widelyly can be used for horizontal well, inclined shaft, contains sand gas well, thick oil well etc.

Description of drawings:

Fig. 1 is the utility model overall structure schematic representation.Fig. 2 is the utility model plunger piston assembly schematic representation.Fig. 3 is the utility model standing valve assembly schematic representation.

Among the figure, 1, helmet, 2, the pump barrel box cupling, 3, pump barrel, 4, plunger piston assembly: 4.1, go up oil-release valve cover, 4.2, piston spring, 4.3, the piston spring seat, 4.4, valve ball, 4.5, valve seat, 4.6, the valve seat back-up ring, 4.7, plunger body, 4.8, the current downflow valve bonnet, 4.9, lower travelling valve seated connection head, 5, standing valve assembly: 5.1, standing valve cover, 5.2, spring, 5.3, spring seat, 5.4, fixed valve ball, 5.5, fixed valve base, 5.6, the fixed valve base joint.

Embodiment:

In Fig. 1, isometrical strong keying oil well pump by helmet 1, pump barrel box cupling 2, pump barrel 3, plunger piston assembly 4, standing valve assembly 5, form, helmet 1 is connected with standing valve assembly 5 tapered threads with pump barrel box cupling 2, pump barrel box cupling 2, plunger piston assembly 4 is packed in the pump barrel 3, and pump barrel box cupling 2 is connected with pump barrel 3 cylindrical threads;

In Fig. 2, in plunger piston assembly 4: pack into piston spring 4.2 in the piston spring seat 4.3 and it is packed into and go up in oil-release valve cover 4.1, valve ball 4.4 is packed in the valve seat 4.5, valve seat 4.5 uses oil-release valve cover 4.1 and valve seat back-up ring 4.6 compresses sealing, valve seat back-up ring 4.6 and current downflow valve bonnet 4.8 are put into plunger body 4.7, and plunger body 4.7 is threaded with current downflow valve base joint 4.9.

In Fig. 3, in standing valve assembly 5, pack into spring seat 5.3 and fixed valve ball 5.4 of spring 5.2 together put into standing valve cover 5.1, fixed valve base 5.5 usefulness fixed valve base joints 5.6 are squeezed in the standing valve cover 5.1.

Claims

1. isometrical strong keying oil well pump is by helmet (1), pump barrel box cupling (2), pump barrel (3), plunger piston assembly (4): go up oil-release valve cover (4.1) piston spring (4.2), piston spring seat (4.3) valve ball (4.4), valve seat (4.5), valve seat back-up ring (4.6), plunger body (4.7), current downflow valve bonnet (4.8), lower travelling valve seated connection head (4.9); Standing valve assembly (5): standing valve cover (5.1), spring (5.2), spring seat (5.3), fixed valve ball (5.4), fixed valve base (5.5), fixed valve base joint (5.6) are formed, it is characterized in that: helmet (1) is connected with standing valve assembly (5) tapered thread with pump barrel box cupling (2), pump barrel box cupling (2), plunger piston assembly (4) is packed in the pump barrel (3), and pump barrel box cupling (2) is connected with pump barrel (3) cylindrical thread; In the plunger piston assembly (4): pack into piston spring (4.2) in the piston spring seat (4.3) and it is packed into and go up in oil-release valve cover (4.1), valve ball (4.4) is packed in the valve seat (4.5), valve seat (4.5) uses oil-release valve cover (4.1) and valve seat back-up ring (4.6) compresses sealing, valve seat back-up ring (4.6) and current downflow valve bonnet (4.8) are put into plunger body (4.7), and plunger body (4.7) is threaded with current downflow valve base joint (4.9); In standing valve assembly (5), pack into spring seat (5.3) and fixed valve ball (5.4) of spring (5.2) together put into standing valve cover (5.1), fixed valve base (5.5) is squeezed in the standing valve cover (5.1) with fixed valve base joint (5.6).