CN201598985U - Energy-saving anti-corrosion wear-resistant pumping rod - Google Patents

Abstract

The utility model discloses an energy-saving anti-corrosion wear-resistant pumping rod, which consists of a pumping rod body, a pumping rod protecting body and a step sheath. The pumping rod protecting body is made of materials with low friction coefficient, integrally coated outside the pumping rod body and is integrated with the same, the pumping rod body is prevented from contacting with well fluid so as to prevent corroding, simultaneously, local stress wear of an original pumping rod is converted into integral plane stress so as to increase stress area, reduce eccentric wear and lower energy consumption, and a step at the end of the pumping rod body is fixedly provided with the step sheath so as to avoid a pumping rod coupler wearing an oil pipe, thereby being capable of reducing wear to the inner wall of the oil pipe due to the ends of the pumping rod. During usage, a connecting form of the energy-saving anti-corrosion wear-resistant pumping rod is identical to that of a common pumping rod, namely after two energy-saving anti-corrosion wear-resistant pumping rods are abutted and fastened, the step sheath is mounted on the step at the end of the pumping rod body, and then the energy-saving anti-corrosion wear-resistant pumping rods can be sequentially connected to be lowered into wells.

Description

A kind of energy-saving anticorrosive abrasion-proof sucker rod

One, technical field

The utility model relates to a kind of energy-saving anticorrosive abrasion-proof sucker rod, especially a kind of energy-saving anticorrosive abrasion-proof sucker rod of being made up of sucker rod body, sucker rod protective and step sheath.

Two, background technology

Sucker rod is used for the oil field oil recovery process, utilizes it that the reciprocating motion of pumping unit is passed to oil well pump, piston is moved reciprocatingly aspirate, and plays the effect of connection and transferring power.The common sucker rod that uses at present adopts steel to stretch to forge and forms, and in the oil recovery process, with oil pipe mutual friction mutually, causes R a T to damage, and shortens the application life of equipment, influences crude output; The sucker rod body soaks in well liquid and corrosion for a long time, influences application life.

At the sucker rod partial wear phenomenon, the normal at present method that adopts the sucker rod part to set upright is administered, as at disclosed deflection abrasion preventing centralizer on January 28th, 2005, patent No. ZL200420001924.5, occurring the sucker rod wearing and tearing after the installation alleviates, oil pipe wearing and tearing aggravation phenomenon, fluid course reduces after installing simultaneously, draw resistance increases, energy consumption increases, the production fluid amount is affected, and effect is general.According to field investigation: sucker rod erection devices such as slip oil pumping rod centering device, tumbling-type centralizer, nylon centralizer exist all after the use that fluid course reduces, draw resistance increases, energy consumption increases, the affected shortcoming of production fluid amount.

For fear of reducing of fluid course; two protection abrasionproof rod collars of announcing on March 15th, 2006; patent No. ZL2005200020231.5; after the use; fluid course is constant, the rod collar wearing and tearing reduce; but box cupling hardness is greater than oil pipe body hardness, and the oil pipe wearing and tearing increase the weight of, the shortening in application life.

To well corrosion sucker rod, shorten sucker rod problem in application life, it is anticorrosion to adopt the mode of coating such as zinc-plated, Du Chrome to carry out at present, effect better but cost is higher.

Three, summary of the invention

The technical problems to be solved in the utility model is to improve the defective and the deficiency of prior art, provides a kind of energy-saving anticorrosive abrasion-proof sucker rod that can whole set upright.

The technical scheme that the utility model is dealt with problems is a kind of energy-saving anticorrosive abrasion-proof sucker rod, is made up of sucker rod body, sucker rod protective and step sheath.The sucker rod protective adopts different wear-resisting light metals with sucker rod body material or nonmetal manufacturing with step sheath, and friction factor is low, energy consumption is low; Sucker rod protective integral body is wrapped in the sucker rod body exterior and becomes as a whole with it, stop contacting of sucker rod body and well liquid, prevent corrosion, it is stressed to change the local pressure wearing and tearing of former sucker rod into integral planar simultaneously, increase lifting surface area, alleviate eccentric wear; Step sheath adopts movable connection method, is fixed on the step of sucker rod body end, and is easy for installation, can reduce the wearing and tearing of sucker rod end to tube inner wall.

The utility model has the following advantages compared with the prior art:

1, energy consumption is low: smooth surface, liquid flowing resistance is little and friction factor is low, and energy consumption is reduced;

2, anticorrosion: the sucker rod body separates with well liquid, prevents corrosion;

3, wear-resistant: as to adopt whole force way and high-abrasive material manufacturing, the wearing and tearing that alleviate R a T;

4, lever strength height:, strengthened the integrally stretching intensity and the yield strength of the body of rod with sucker rod protective and sucker rod bulk junction integrator.

Four, description of drawings

Fig. 1 is the structural representation of first kind of embodiment of a kind of energy-saving anticorrosive abrasion-proof sucker rod of the utility model;

Fig. 2 is the structural representation of Fig. 1 sucker rod protective;

Fig. 3 is the horizontal local amplification view of Fig. 2;

Fig. 4 is the structural representation of Fig. 1 step sheath;

Fig. 5 is the lateral view of Fig. 4 step sheath;

Fig. 6 is the vertical view of Fig. 4 step sheath;

Fig. 7 is the front view of Fig. 4 sheath 2-1;

Fig. 8 is the lateral view of Fig. 7;

Fig. 9 is the vertical view of Fig. 7;

Figure 10 is the front view of Fig. 4 sheath 2-2;

Figure 11 is the lateral view of Figure 10;

Figure 12 is the vertical view of Figure 10;

Figure 13 is the structural representation of second kind of embodiment of a kind of energy-saving anticorrosive abrasion-proof sucker rod of the utility model;

Figure 14 is the structural representation of Figure 13 sucker rod protective;

Figure 15 is the horizontal local amplification profile of Figure 14.

Five, the specific embodiment

Referring to Fig. 1 to Figure 12, a kind of energy-saving anticorrosive abrasion-proof sucker rod is made up of sucker rod body 1, sucker rod protective 3 and step sheath 2.Sucker rod protective 3 is light metal or nonmetals; outside for having the spiral fluted cylinder; the cylinder external diameter is more than or equal to the step of sucker rod body 1 end; inner combine with sucker rod body 1, as a whole by technologies such as squeeze note, bonding, injection moulding, extrusion molding, winding or sprayings with 1 one-tenth of sucker rod body.Step sheath 2 adopts flexible connection with the step of sucker rod body 1 end, and step sheath 2 comprises sheath 2-1, sheath 2-2 and steady pin 2-3; Sheath 2-1 is outside to be that the cylinder of 1/4-1/2 (figure is 1/4 cylinder), an inner lateral edges have steady pin 2-3 and sheath 2-2 to flexibly connect, and opposite side has outstanding bayonet socket 2-1-1; Sheath 2-2 outside is the cylinder of 1/2-3/4 (figure is 3/4 cylinder); cooperating with sheath 2-1 becomes a hollow circular cylinder; its external diameter is more than or equal to the external diameter of sucker rod protective 3; sheath 2-2 internal construction identical with sucker rod end step shape (figure is square); so that it is stuck on the step; sheath 2-2 side is embedded with the strip hole clipping 2-2-1 of indent, during installation the bayonet socket 2-1-1 on the sheath 2-1 is snapped in.

Provide the structural representation of another kind of energy-saving anticorrosive abrasion-proof sucker rod referring to Figure 13 to Figure 15, wherein the sucker rod protective 3, the outside is the cylinder of segmentation, the cylinder external diameter of segmentation is more than or equal to the step of sucker rod body 1 end, inside combines with sucker rod body 1, and molten as a whole in sucker rod body 1; Step sheath 2 is identical with first kind of embodiment.

During use, identical with common sucker rod connected mode, be about to the energy-saving anticorrosive abrasion-proof sucker rod butt joint, fastening after, again step sheath 2 is installed on the step of sucker rod body 1 end, connect successively then and go into the well.

Certainly, sucker rod protective 3 can adopt other fixed form in sucker rod body 1, as cast molding, bonding, squeeze note, spraying, extrusion molding, injection moulding, rotational moulding, winding or other engineering plastics processing technology.Sucker rod protective 3 outer cross-sectional shape can be circle, ellipse, band spiral fluted circle, gear shape or other shape.Step sheath 2 and the connected mode of sucker rod body 1 end step are not limited to the movable connection method of bearing pin and bayonet socket, also can adopt other movable connection method, as snap-in connection, turn round that cassette connects, split-type connects, circlip type connects or hinge connects.The material of sucker rod protective 3 and step sheath 2 can adopt the metal different with sucker rod body 1 material, nonmetal or composite material manufacturing, as various alloys, rubber, plastics, composite material or other synthetic materials.The external surface of sucker rod body 1 can have coating, also can not have coating or only at two ends coating is arranged.Sucker rod body 1 can be solid, also can be hollow.Can supportingly use with sucker rod protective 3 and step sheath 2 that sucker rod body 1 becomes one, also can use the sucker rod protective 3 that becomes one with sucker rod body 1 separately.Sucker rod protective 3 can integral body be wrapped in outside the sucker rod body 1, also can fragmented packets be rolled in outside the sucker rod body 1, and sucker rod protective 3 outer cross-sectional shape of segmentation parcel can be circle, ellipse, band spiral fluted circle, gear shape or other shape.Above-described conversion only is a preferred implementation of the present utility model.Should be pointed out that for the person of ordinary skill of the art under the prerequisite that does not break away from the utility model principle, can also make some distortion and improvement, these also are considered as belonging to protection domain of the present utility model.

Claims (5)

1. energy-saving anticorrosive abrasion-proof sucker rod; form by sucker rod body (1), sucker rod protective (3) and step sheath (2); it is characterized in that: sucker rod protective (3) and step sheath (2) adopt light metal or the nonmetal manufacturing with sucker rod body (1) unlike material; sucker rod protective (3) integral body is wrapped in sucker rod body (1) outside and becomes as a whole with it; step sheath (2) adopts movable connection method, is fixed on the step of sucker rod body (1) end.

2. according to the described a kind of energy-saving anticorrosive abrasion-proof sucker rod of claim 1; it is characterized in that: described sucker rod protective (3); outside the cylinder external diameter is more than or equal to the step of sucker rod body (1) end in order to have the spiral fluted cylinder, and inside combines with sucker rod body (1).

3. according to the described a kind of energy-saving anticorrosive abrasion-proof sucker rod of claim 1; it is characterized in that: described sucker rod protective (3); the outside is the cylinder of segmentation, and the cylinder external diameter of segmentation is more than or equal to the step of sucker rod body (1) end, and inside combines with sucker rod body (1).

4. according to the described a kind of energy-saving anticorrosive abrasion-proof sucker rod of claim 1, it is characterized in that: described step sheath (2), comprise sheath (2-1), sheath (2-2) and steady pin (2-3), sheath (2-1) outside is the cylinder of 1/4-1/2, an inner lateral edges has the steady pin (2-3) that is connected with sheath (2-2), and opposite side has outstanding bayonet socket (2-1-1).

5. according to claim 1 or 4 described a kind of energy-saving anticorrosive abrasion-proof sucker rods, it is characterized in that: the sheath (2-2) of described step sheath (2), the outside is the cylinder of 1/2-3/4, internal construction is identical with sucker rod body (1) end step shape, and side is embedded with the strip hole clipping (2-2-1) of indent.

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