CN201277164Y

CN201277164Y - Oil-draining lubricator type oil pump

Info

Publication number: CN201277164Y
Application number: CNU2008201497539U
Authority: CN
Inventors: 陈晓华; 何世伟; 徐正国
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-10-16
Filing date: 2008-10-16
Publication date: 2009-07-22
Anticipated expiration: 2018-10-16

Abstract

A lubricator type oil-well pump capable of draining oil is an oil exploitation device in an oilfield oil well, which solves the disadvantages of other technologies. The structure relation thereof is that a plunger pushing cap is connected with plunger threads, a plunger assembly can slid in a pump barrel under the driving of a sucker rod, a body is installed between an oil-well pump lower coupling and a fixed valve assembly, and is connected through threads, a retainer ring is installed on the upper end of the body, a spacer ring and a rubber sealing element are arranged in an inner hole on the upper end of the body in turn, a piston is arranged in an inner hole on the lower end of the body, an O-shaped ring is arranged on the piston, two oil draining holes and two external threaded holes are arranged on the body, a shear pin is installed in the threaded holes to locate the piston into the body, and simultaneously, the piston can seal the oil draining holes and the threaded holes.

Description

But a kind of blowout prevention tubing pump of draining

One, technical field:

The utility model relates to oilfield petroleum production device, but especially a kind of blowout prevention tubing pump of draining.

Two, background technique:

The at present main oil well pump that uses does not have the blowout prevention function, in case when borehole pressure raise, the highly pressurised liquid in the well passed oil well pump and reaches ground, if the ground blowout control equipment is dealt with improperly, rod parting in addition just may cause the accident, in case also can cause crude oil pollution well site even gas blowout accident etc.

Three, summary of the invention:

But the purpose of this utility model provides and can prevent the disconnected blowout prevention tubing pump that takes off a kind of draining that causes that well head is out of control of polished rod, it has solved the shortcoming that other technology exists, the purpose of this utility model is to realize like this, it is to be formed by connecting by pump barrel, plunger, plunger depression cap, ring washer, spacer ring, rubber seal, body, " O " type circle, shear pin, piston and standing valve assembly, the plunger depression cap is connected with plunger screw, and plunger piston assembly can slide in pump barrel under the drive of sucker rod; Body is installed under the oil well pump between the box cupling and standing valve assembly and by being threaded; Upper end at body is equipped with ring washer, in the endoporus of body upper end spacer ring, rubber seal is installed successively; In the endoporus of body lower end piston is installed, " O " type circle is installed on the piston; Two leak oilhole and two outside thread holes are arranged on the body, and shear pin is installed in this tapped hole, and piston is positioned in the body; Piston is also with draining hole and tapped hole sealing simultaneously.

Piston seal draining hole and tapped hole have certain distance between the lower pressing cap of plunger and the Sealing of body during normal the oil pumping; This moment, oily stream can pass through draining piston, Sealing.

Blowout prevention: transfer sucker rod, the entity axle of plunger depression cap 3 front portions inserts in the Sealing endoporus of body upper end, action of gravity lower isolating ring at sucker rod moves down compressive seal, thereby undergauge reaches the blowout prevention effect with the entity shaft sealing of plunger depression cap front portion behind the Sealing pressurized.

Draining: trip out sucker rod and plunger piston assembly, caber in the heavy wool pipe, impact piston 10 is cut off shear pin, and piston moves down, and exposes the draining hole, thus draining.

Meaning of the present utility model is: the machine that 1, can prevent is taken out well and is taken out polished rod sealer and the low problem of rubber gate pressure-bearing under the spray situation; Common polished rod sealer of well head and rubber gate pressure-bearing are lower at present, and general pressure can not surpass 3Mpa, in order to guarantee well head safe, surpass this pressure and must organize kill-job.This technology can be shut down after machine is taken out spray bar pressure and risen, under the well head band pressure situation with the polished rod test; plunger is at the bottom of the pump, and pressurization is more than 0.5 ton, the sealing of oil pipe path; the weak spot polished rod sealer place that the machine of assurance is taken out well is not with pressure, and the normal blowing production of sleeve pipe wing charge of oil mouth.2, can prevent that disconnected the taking off of polished rod from causing that well head is out of control.

Four, description of drawings:

But the structural representation of the blowout prevention tubing pump of a kind of draining of Fig. 1 is among the figure 1, pump barrel 2, plunger 3, plunger depression cap 4, ring washer 5, spacer ring 6, rubber seal 7, body 8, " O " type circle 9, shear pin 10, piston 11, standing valve assembly

Fig. 2 is the mounting point schematic representation of plunger depression cap, among the figure 3, the plunger depression cap

Fig. 3 is a blowout prevention draining partial schematic diagram, 4, ring washer 5, spacer ring 6, rubber seal 7, body 8, " O " type circle 9, shear pin 10, piston 11, standing valve assembly

Five, embodiment:

In Fig. 1, Fig. 2 and Fig. 3, plunger depression cap 3 is threaded with plunger 2, and plunger piston assembly can slide in pump barrel 1 under the drive of sucker rod; Body 7 is installed under the oil well pump between the box cupling and standing valve assembly and by being threaded; In the upper end of body ring washer 4 is installed, in body 7 upper end endoporus, spacer ring 5, rubber seal 6 is installed successively; In the body 7 lower end endoporus piston 10 is installed, " O " type circle 8 is installed on the piston 10; Two leak oilhole and two outside thread holes are arranged on the body 7, and shear pin 9 is installed in this tapped hole, and piston 10 is positioned in the body 7; Piston 10 is also with draining hole and tapped hole sealing simultaneously.

Piston 10 sealing draining hole and tapped holes have certain distance between the lower pressing cap of plunger and the Sealing of body during normal the oil pumping; This moment, oily stream can pass through draining piston, Sealing.

Blowout prevention: transfer sucker rod, the entity axle of plunger depression cap 3 front portions inserts in the Sealing endoporus of body upper end, action of gravity lower isolating ring at sucker rod moves down compressive seal 6, thereby undergauge reaches the blowout prevention effect with the entity shaft sealing of plunger depression cap 3 front portions behind Sealing 6 pressurizeds.

Draining: trip out sucker rod and plunger piston assembly, caber in the heavy wool pipe, impact piston 10 is cut off shear pin 9, and piston 10 moves down, and exposes the draining hole, thus draining.

Claims

But 1, a kind of blowout prevention tubing pump of draining, it is to be formed by connecting by pump barrel (1), plunger (2), plunger depression cap (3), ring washer (4), spacer ring (5), rubber seal (6), body (7), " O " type circle (8), shear pin (9), piston (10) and standing valve assembly (11), it is characterized in that: body (7) is installed under the oil well pump between the box cupling and standing valve assembly (11) and by being threaded; In the upper end of body (7) ring washer (4) is installed, in the endoporus of body (7) upper end, spacer ring (5), rubber seal (6) is installed successively; In the endoporus of body (7) lower end piston (10) is installed, " O " type circle (8) is installed on the piston (10).
But 2, the blowout prevention tubing pump of a kind of draining according to claim 1 is characterized in that: two leak oilhole and two outside thread holes are arranged on the body (7), and shear pin (9) is installed in this tapped hole, and piston (10) is positioned in the body (7); Piston (10) is also with draining hole and tapped hole sealing simultaneously.
But 3, the blowout prevention tubing pump of a kind of draining according to claim 1 is characterized in that: plunger depression cap (3) is threaded with plunger (2), and plunger piston assembly can slide in pump barrel (1) under the drive of sucker rod.