CN2445093Y - Petroleum pumping packer - Google Patents

Abstract

The utility model discloses a petroleum pumping packer, which is composed of a frame support, steel wires, a locking cup and a rubber body. The shape of the whole pumping packer is in the shape of a cone; service wear segments of the steel wire and the rubber body are provided with the degree of taper of 5'-20', and the optimum range is 10'-15'. In addition, front deformation segments of the steel wire and the rubber body are provided with the degree of 15DEG-17DEG. The utility model has favorable corrosion resistance and abrasive resistance, which is suitable for the technology of complicated chemical components in crude oil, and can normally work for the travel of 10 myriameters or so under the working condition of under the pressure intensity of 30 megapascals and the running speed of 200m/min; the petroleum pumping packer reaches or exceeds the technical index of similar imported products, and can be completely used as the import substitution product to spread and use.

Description

The oil pumping packer

The utility model relates to a kind of oil pumping packer, and the oil recovery that is used for oil mining oil pumping just or low yield low pressure oil well is produced, and belongs to oil recovery Swab Technology field.

Pumping packer (claiming the valve swab again) is generally used in China oil field, but is almost imported product, and price is higher.The domestic product of once developing, under the condition of work of 30 MPa pressure, speed of service 200m/min, its anti-wear performance is low, application life short; In addition, chemical composition is comparatively complicated in the crude oil, and home products is in corrosion such as acidproof, alkaline-resisting, anti-sulfide, and is obviously not enough.According to oil well reflection, home products application life all below 1 myriametre, lacks economy, so home products is not used in the oil field substantially.

At above-mentioned situation, the purpose of this utility model is to develop that a kind of abrasion-proof corrosion-proof performance is strong, the oil pumping packer of long service life, with import substitutes.

The technical scheme that realizes above-mentioned purpose is, the utlity model has the skeleton that constitutes by skeletal support, steel wire and locking cup, skeleton is embedded in the swab rubber bodies, whole pumping packer external form is the garden taper, and the service wear section of its steel wire and rubber bodies service wear section external form have 5 '-20 ' certain tapering.To the part time job state analysis, and set up mechanical model by repeatedly, promptly when pumping packer moved upward, internal pressure increases expanded with the tube wall sealing swab, forms negative pressure of vacuum in oil pick-up tube, reaches the oil pumping effect.In this process, swab should be enough to sealed tube wall when expanding, as it is too small to expand, and can not seal, and just can't reach the oil pumping effect; But can not excess enthalpy, otherwise can cause frictional force to strengthen, increase wearing and tearing, influence product application life.Therefore, this product must be controlled swell increment in certain scope, reaches its instructions for use.Thus, defectiveness on the existing product structure, when work, the stress deformation form is bad, and it is excessive promptly to expand, and the maximum position that expands is incorrect, make the wearing and tearing increase or may wear to the position that should not wear and tear, as the main wearing part of existing product up, make its this part rubber cause intensity difference because of wearing and tearing, this is to produce one of reason that comes off or ftracture.From product structure, the greatest wear position should by force analysis, find that the top bent angle of product skeleton is very important at the product middle part, and the size of angle directly has influence on steel wire flexural deformation, and the diastrophic form of steel wire has determined the position of swab wearing and tearing.Calculate and field experiment through theoretical modeling repeatedly, when drawing skeleton and assembling, the service wear section of steel wire should have certain taper, promptly should have 5 '-20 ' the inclination tapering, the service wear section external form after the rubber bodies moulding also should have 5 '-20 ' tapering simultaneously.The goods stress deformation form that can be greatly improved like this improves wear resistence, prolongs and uses the working time.

The best range of taper of the service wear section of above-mentioned steel wire and rubber bodies is 10 '-15 '.The tapering of this scope, the application life that can obviously improve goods.

The preceding deformation section tapering of above-mentioned steel wire and rubber bodies is 15 °-17 °, and optimum range is 16 °-16.5 °.The preceding deformation section of steel wire and rubber bodies keeps big and be that the angle of above-mentioned scope tilts, and when in its pressurized when crooked, can make steel wire and rubber bodies service wear section keep a kind of desirable deformation form, thus the abrasive resistance of raising workpiece.

Above-mentioned skeleton surface adopts blasting craft to make the sand grains rough surface, to improve the bonding surface area between rubber and metallic framework, makes rubber and Bond Strength greater than rubber body intensity.

Another design feature of the utility model is that rubber adopts the hydrogenation nitrile rubber to make, to improve the wear-resisting anti-rotten power of goods.

The utility model goods are through oilfield test and on probation, and its performance indications all meet or exceed similar imported product, obtain trier's appreciation, can be used as the import substitution product fully.The utlity model has:

1, acid and alkali resistance and sulfide corrosion are applicable to the technology of complex chemical composition in the crude oil;

2, wear-resisting, at 30 MPa pressure, under the condition of work of speed of service 200m/min, about energy operate as normal stroke 10 myriametres, nothing is come unstuck.Similar U.S. imported product application life is only about 8 myriametres.

Further specify the utility model structure below in conjunction with Figure of description.

Fig. 1 is the utility model product structure schematic diagram.

Fig. 2 is that the A of Fig. 1 is to view.

Fig. 3 is a skeleton structure diagram.

Fig. 4 is that the B of Fig. 3 is to view.

The utility model oil pumping packer, have by skeletal support 1, steel wire 2 and locking cup 3 skeletons that constitute (seeing Fig. 3-4), skeletal support is a global formation spare, and steel wire is 30 (radical can be determined on a case-by-case basis), steel wire is inserted on the skeletal support in the corresponding jack, and opens locking by the locking cup is outer; The skeleton surface adopts blasting craft to make the sand grains rough surface, skeleton is embedded in the swab rubber bodies 4 (seeing Fig. 1-2), rubber bodies is selected import hydrogenation nitrile rubber for use, strictness was refined glue (each cure time 20-25 minute by technological process, 170 ° of temperature) make (rubber mainly seals, and steel wire is strengthened its abrasion resistance).Whole pumping packer external form is the garden taper slightly, the service wear section 5 of its steel wire, the service wear section 6 of rubber bodies have 5 '-20 ' tapering, optimum range is 10 '-15 '; The angle of the preceding deformation section 7 of steel wire and the preceding deformation section 8 of rubber bodies is 15 °-17 °, and best range of taper is 16 °-16.5 °; Back deformation section 9 angles of steel wire are 19 °-22 °, and optimum range is 20.5 °-21.5 °.By contrast, the product relevant work of similar import wearing and tearing Duan Weiyuan cylindricality, preceding deformation section tapering is 14 °-15 °, the deformation section angle is about 19 ° behind the steel wire.

Claims (6)

1, a kind of oil pumping packer, has the skeleton that constitutes by skeletal support (1), steel wire (2) and locking cup (3), skeleton is embedded in the swab rubber bodies (4), it is characterized in that the pumping packer external form is the garden taper, the service wear section of its steel wire and rubber bodies (5,6) has 5 '-20 ' tapering.

2, oil pumping packer according to claim 1, the work that it is characterized in that steel wire and rubber bodies rub the best range of taper of wearing and tearing section be 10 '-15 '.

3, oil pumping packer according to claim 1, it is characterized in that steel wire and rubber bodies before deformation section (7,8) have 15 °-17 ° angle, best tapering is 16 °-16.5 °.

4, oil pumping packer according to claim 1, back deformation section (9) angle that it is characterized in that steel wire is 19 °-22 °, the best angle scope is 20.5 °-21.5 °.

5, as oil pumping packer as described in the claim 1-4, it is characterized in that skeleton has the sandblast rough surface.

6,, it is characterized in that rubber bodies adopts the hydrogenation nitrile rubber to make as oil pumping packer as described in the claim 5.

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