CN201078204Y

CN201078204Y - Antipollution well-washing device

Info

Publication number: CN201078204Y
Application number: CNU2007200940737U
Authority: CN
Inventors: 李颖; 邓延波; 刘福林
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-07-13
Filing date: 2007-07-13
Publication date: 2008-06-25
Anticipated expiration: 2017-07-13

Abstract

The utility model discloses an anti-pollution flushing device. A sliding check valve part (3) is sleeved in the superior part of a main body part (2), and a clamp spring (1) is arranged between the superior part of the sliding check valve part (3) and the internal wall of the main body part (2). A shear pin (4) is positioned between the inferior part of the sliding check valve part (3) and the main body part (2). An upper rubber cylinder base part (6), a rubber cylinder part (7), a cone (8), a spider (9) and a spider seat (10) are orderly sleeved outside the main body part (2) of the sliding check valve part (3). A locking piece (5), which is inserted in a slot of the upper rubber cylinder base part (6), is positioned on the main body part (2) at the inferior part of the shear pin. An air chamber (A) is formed between the upper rubber cylinder base part (6) and the main body part (2). The inferior part of the spider seat (10) is buckled on the main body part (2). A releasing shear pin (11) is arranged between the spider seat (10) and the main body part (2), and a bottom check valve (12) is mounted at the end lap of an internal pipe of the main body part (2). By the utility model, the oil layer can be prevented from being polluted by the entered flushing fluid during the back flushing process.

Description

Anti-pollution well washing apparatus

Technical field

The utility model relates to a kind of oil field well instrument, particularly a kind of anti-pollution well washing apparatus.

Background technology

Well-flushing is one of the most frequently used wax removal viscosity reduction measure of oil well, paraffin-troubled well is washed by heat, can heat and melted paraffin gradually, flushing fluid is taken the paraffin of fusing out of pit shaft, increased tubing string oil stream lifting passage with under wax deposition, producing to compare, reduce fluid in the lifting process along the journey hydraulic loss, improve oil well pump volumetric efficiency and system effectiveness; Heavy oil wells often causes the pump accident of suppressing when excessive opening pump or viscosity of thickened oil, can improve temperature in wellbore and the liquid level that resumes production by hot clean-up well, thereby reduce viscosity of crude, oil well is started under underload and works; Before the oil well maintenance, often come the greasy dirt of wash oil tubing string inside and outside wall and sucker rod external surface, reduce the ground pollution that workover treatment brings, reduce the workload that sucker rod and oil pipe ground are cleaned simultaneously, improved operating efficiency greatly by hot clean-up well; When well maintenance with certain blowing ability, well-flushing not only plays cleaning action, also plays the effect of kill-job, has prevented that pipe back from causing the well kick that borehole pressure produces, the generation of gas blowout accident because of the pit shaft deficit, especially offshore platform well, well-flushing are the construction operations that must finish before the maintenance.

Well-flushing divides two kinds of positive well-flushing and anti-flushing wells, be subjected to the restriction of flow string own characteristic, what most producing wells adopted is anti-flushing well, just flushing fluid injects from the oil jacket annular space, go out well head (sucker rod pumping is to return out from the ring-like sky that sucker rod and oil pipe are formed) from the tubing string internal return that produces oil, crossing the hollow rod well-flushing is a kind of new technology, can prevent the pollution of flushing fluid to oil reservoir, but condition is to adopt hollow sucker rod oil production, and be equipped with corresponding aid, and the well-flushing discharge capacity is subjected to the restriction of hollow rod internal diameter.Therefore the anti-flushing well technology generally is used for the construction operation of oil well.

The oil field development middle and later periods, although rely on water filling (or other chemicals) to keep stratum energy,

In the washing well process, flushing fluid still can enter the low pressure layer and cause the pollution of oil reservoir; For the bigger oil reservoir of deficit, a lot of flushing fluids enter the stratum and can reduce well-flushing efficient greatly, when causing oil layer pollution, after oil well puts into production, need several days could be with the flushing fluid emptying, rate when greatly reducing the production of oil well, therefore anti-pollution washing technology has great importance to the High-efficient Production exploitation in oil field.

Summary of the invention

The purpose of this utility model provides a kind of anti-pollution well washing apparatus, and this anti-pollution well washing apparatus can prevent that flushing fluid from entering oil reservoir and causing oil layer pollution in the anti-flushing well process.

The utility model is by jump ring, main part, ball-and-seat part slidably, shear pin, lock dog, last glue tube base part, the packing element part, cone, slips, slip spider, the deblocking shear pin, end ball-and-seat is formed, slidably ball-and-seat partly is enclosed within the top of main part, slidably be embedded jump ring between the inwall of the top of ball-and-seat part and main part, slidably between the bottom of ball-and-seat part and the main part shear pin is set, the sheathed successively outward glue tube base part that goes up of the main part of ball-and-seat part bottom slidably, the packing element part, cone, slips, slip spider, the main part of bottom, shear pin position is provided with lock dog, this lock dog is embedded in the groove of glue tube base part, be formed with air chamber between last glue tube base part and the main part, the bottom button retaining of slip spider is on main part, the deblocking shear pin is set between slip spider and the main part, and the bottom of pipe is provided with end ball-and-seat in the main part.

Operating principle of the present utility model and process are:

Set:

This anti-pollution well washing apparatus is installed under the pump, when being used for reciprocating pump, remove original pump standing valve, transfer in the process of dead space at pump, oil pump plunger piston can bump against slidably ball-and-seat part, cut off shear pin, under the effect that is arranged on the jump ring on the main part, slidably ball-and-seat partly is fixed on the main part; Simultaneously, because of moving down of the part of ball-and-seat slidably, last glue tube base partly loses the location, compression packing element part, and under the effect of compression packing element part, cone enters slips, and slips is expanded and is anchored on the sleeve pipe.General well-flushing liquid level will raise, and hydrostatic active force can be big more, and air chamber is more little, and the packing element part sets fully, seals up the tubing and casing annular space.

Well-flushing:

During well-flushing, flushing fluid by be arranged on main part and slidably the passage of ball-and-seat part enter slidably between the ball-and-seat part and end ball-and-seat, under the sealing of end ball-and-seat, open the slidably ball-and-seat of ball-and-seat part; Flushing fluid enters pump and flow string and does not enter the stratum, reaches the purpose of anti-pollution well-flushing.

Deblocking:

The upper lifting pipe post is cut off the deblocking shear pin, and slips and slip spider move down, anti-pollution well washing apparatus deblocking.

The utility model has the advantages that: in the process of anti-flushing well, can prevent that flushing fluid from entering oil reservoir and causing oil layer pollution.

Description of drawings

Fig. 1 is the cross-sectional schematic of the utility model embodiment.

Schematic diagram when Fig. 2 is in the well-flushing state for the utility model embodiment.

The specific embodiment

See also shown in Figure 1, the utility model embodiment is by jump ring 1, main part 2, slidably the ball-and-seat part 3, shear pin 4, lock dog 5, last glue tube base part 6, packing element part 7, cone 8, slips 9, slip spider 10, deblocking shear pin 11, end ball-and-seat 12 is formed, slidably ball-and-seat part 3 is enclosed within the top of main part 2, slidably be embedded jump ring 1 between the inwall of the top of ball-and-seat part 3 and main part 2, slidably between the bottom of ball-and-seat part 3 and the main part 2 shear pin 4 is set, outer sheathed successively glue tube base parts 6 that go up of the main part 2 of ball-and-seat part 3 bottoms slidably, packing element part 7, cone 8, slips 9, slip spider 10, the main part 2 of bottom, shear pin 4 position is provided with lock dog 5, this lock dog 5 is embedded in the groove of glue tube base part 6, be formed with air chamber A between last glue tube base part 6 and the main part 2, the bottom button retaining of slip spider 10 is on main part 2, between slip spider 10 and the main part 2 deblocking shear pin 11 is set, the bottom of pipe is provided with end ball-and-seat 12 in the main part 2, in this embodiment, slidably ball-and-seat part 3 and the end ball-and-seat 12 controls member of closing is a valve ball.

See also shown in Figure 2ly, the operating principle and the process of present embodiment are:

Set:

This anti-pollution well washing apparatus is installed under the pump, when being used for reciprocating pump, remove original pump standing valve, transfer in the process of dead space at pump, oil pump plunger piston can bump against slidably ball-and-seat part 3, cut off shear pin 4, under the effect that is arranged on the jump ring 1 on the main part 2, slidably ball-and-seat part 3 is fixed on the main part 2; Simultaneously, cause is moving down of ball-and-seat part 3 slidably, and last glue tube base part 6 loses the location, compression packing element part 7, under the effect of compression packing element part 7, cone 8 enters slips 9, and slips 9 is expanded and is anchored on the sleeve pipe, and general well-flushing liquid level will raise, hydrostatic active force can be big more, A is more little for air chamber, and packing element part 7 sets fully, seals up the tubing and casing annular space.

Well-flushing:

During well-flushing, flushing fluid by be arranged on main part 2 and slidably the passage of ball-and-seat part 3 enter slidably between the ball-and-seat part 3 and end ball-and-seat 12, under the sealing of end ball-and-seat 12, open the slidably ball-and-seat of ball-and-seat part 3; Flushing fluid enters pump and flow string and does not enter the stratum, reaches the purpose of anti-pollution well-flushing.

Deblocking:

The upper lifting pipe post is cut off deblocking shear pin 11, and slips 9 moves down anti-pollution well washing apparatus deblocking with slip spider 10.

Claims

1. anti-pollution well washing apparatus, it includes jump ring (1), main part (2), shear pin (4), lock dog (5), goes up glue tube base part (6), packing element partly (7), cone (8), slips (9), slip spider (10), deblocking shear pin (11), end ball-and-seat (12), it is characterized in that: also have slidably ball-and-seat part (3), this slidably ball-and-seat part (3) be enclosed within the top of main part (2), last glue tube base partly is formed with air chamber (A) between (6) and the main part (2).

2. a kind of anti-pollution well washing apparatus according to claim 1 is characterized in that: the member that described slidably ball-and-seat part (3) and end ball-and-seat (12) control are closed is a valve ball.