CN2580105Y

CN2580105Y - Screw fixing type oil pump rod centralizer paraffin scraper

Info

Publication number: CN2580105Y
Application number: CN 02264675
Authority: CN
Inventors: 程佑富
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-09-27
Filing date: 2002-09-27
Publication date: 2003-10-15
Anticipated expiration: 2012-09-27

Abstract

The utility model relates to a screw fixing type centralizing paraffin scraper of a sucker rod, which belongs to the technical field of oil production eccentric wear preventing tools of sucker rod pumps in an oil field. The utility model has the structure that a plurality of helical convex platforms are arranged the cylindrical surface of the outer margin of the centralizing paraffin scraper; flow passing grooves are arranged between the helical convex platforms. The utility model has the advantages that the problem that a centralizer of a pumping oil production device of a sucker rod pump in an oil field can not carry out centralizing operation and paraffin scrape simultaneously is solved, the period of pump inspection in an oil well is extended, well times for maintainability operation are reduced, the eccentric wear between pipes and rods is effectively avoided, the abandonment of pipes and rods is reduced, labor intensity is alleviated for workers, the fluid production rate of an oil well is increased, the oil production cost is reduced, and convenience is offered for manufacture.

Description

The fixed centering paraffin scraper for sucker rod of screw type

Technical field

The utility model relates to the fixed centering paraffin scraper for sucker rod of a kind of screw type, belong to the anti-eccentric wear electrician testing tool technology field of oil field sucker rod pump pump extraction oil.

Background technology:

The following three kinds centralizer of general employing in existing oil field sucker rod pump pump extraction oil equipment: ball, roller type, KSK-58 nylon column formula, loose piece formula nylon centralizer, all also there are some relatively distinct issues in they when beam hanger is played centralizing function: 1) ball, roller type centralizer, by the metal material manufacturing, in use exist load excessive, thereby contact stress is big; Perishable, cause steel ball to come off easily, the card flow string exists rolling wheel centralizer easily to rub pivot pin, problems such as roller, the easy eccentrically worn tubing of ball in addition; 2) KSK-58 nylon column centralizer, though can alleviate the wearing and tearing of rod tube, but can only be installed in the rod collar place, to spacing is can not implement to set upright in the middle of the sucker rod of 8M, the eccentric wear of curved portion is still unresolved, simultaneously steel joint diameter is big, and it is long-pending limited that nylon block is crossed the chute section, and resistance is big, influence reason output; 3) loose piece formula nylon centralizer also can slow down the wearing and tearing of pipe bar, but because this centralizer is formed by two, utilize the lacing wire and the sucker rod of R=0.5 millimeter chimeric, manually be sleeved on during use on the sucker rod, there are two kinds of defectives in this structure again, and the one, gapped between centralizer and the sucker rod contact surface, play on the body of rod easily during oil recovery, formation water can be detained in the gap, and the corrosion sucker rod causes disconnected bar easily; The 2nd, easily come off after the wearing and tearing of centralizer mating face and cause card well fault.Boss on this centralizer outer rim cylinder is the design of straight type simultaneously, is to contact with the oil well pipe inwall, and it is inhomogeneous to set upright the weak effect wearing and tearing.Above-mentioned centralizer does not possess the function of paraffin cutting, for the high oil well of the crude oil content of wax, can only take paraffin removing with chemical method, heat to wash or the underground work paraffin cutting solves the problem of tubing string wax deposition, increased well maintenance well in operation time, cost for oil production is high, labor strength is big, and influences crude output.

Summary of the invention:

The purpose of this utility model is the defective at above-mentioned existence, a kind of centering paraffin scraper of new structure is proposed, technical solution of the present utility model: several helical form boss are arranged on the face of cylinder of centering paraffin scraper outer rim, between helical form boss and the helical form boss chute was arranged.Centering paraffin scraper circumferentially nothing is installed on arbitrary axial location of sucker rod rotationally and with one heart.Compared with prior art, adopt the spiral boss design on the cylinder of centralizer outer rim, make centralizer and oil well pipe inwall become the uniform face of cylinder to contact, effectively avoided rod and tube partial-wear on the one hand, the wax crystal of tubing string inwall can't be formed, played the double effects of not only setting upright rod tube but also paraffin cutting.Centering paraffin scraper and sucker rod are fixed together, and very close to each otherly between the sucker rod can not corrode sucker rod, cause disconnected bar, and fault is caused in the down-hole that also can not come off behind the surface abrasion.Also can not scurry the position during use, and overcurrent concentrated flow road sectional area adds very much not and can produce resistance, do not influence crude output.The position and the quantity of centering paraffin scraper are provided with on demand, have solved curved portion and have set upright the not enough problem of density.Therefore, advantage of the present utility model: the difficult problem that to carry out simultaneously with paraffin cutting set upright that has solved centralizer in the oil field sucker rod pump extraction oil equipment, prolonged the oil well pump detection period, reduced the maintainability well in operation, avoided rod and tube partial-wear effectively, reduced rod tube and scrapped, alleviated working strength of workers, improve the production fluid amount of oil well, reduced cost for oil production, and convenient the manufacturing.

Description of drawings:

Accompanying drawing 1 is a main TV structure schematic diagram of the present utility model.

Accompanying drawing 2 is plan structure schematic diagrames of accompanying drawing 1

Accompanying drawing 3 the utility model user mode schematic diagrames.

Accompanying drawing 4 is plan structure schematic diagrames of accompanying drawing 3.

Among the figure 1 is sucker rod, the 2nd, centering paraffin scraper, the 3rd, spiral boss, the 4th, chute, the 5th, oil well pipe.

The specific embodiment:

Contrast figure, with high molecular abrasion-proof, the disposable shaping of resistant material cast on the position that sucker rod 1 needs, made centralizer 2, four helical form boss are arranged on the cylinder of its outer rim, when oil pumper rotates, pulling sucker rod 1, operation repeatedly up and down in oil well pipe 5, spiral boss 3 is that the face of cylinder contacts with the inwall of oil well pipe 5, at this moment, rubbing surface increases, and wearing and tearing have evenly prevented concentrated wear (eccentric wear) effectively.Owing in the macromolecular material of making centralizer 2, added sliding agent, reduced the friction factor when centralizer 2 moves with respect to oil well pipe 5, frictional force reduces, thereby has more effectively protected sucker rod 1 and oil well pipe 5.Because centralizer 2 casting are fixed on the sucker rod 1, with its no gap, so sucker rod 1 is difficult for the burn into fracture.Four boss 3 on the outer rim cylinder of centralizer 2, cross chute 4 and adopt the screw type design, spiral boss forms the face of cylinder with the tubing string inwall and contacts, the inwall of the boss 3 friction oil well pipes 5 when sucker rod 1 moves up and down repeatedly on the centralizer 2 outer rim cylinders, spiral boss 3 makes wax crystal can't form the purpose that reaches paraffin cutting, simultaneously play the effect of setting upright rod tube again, and the liquid inflow-rate of water turbine of helicla flute 4 is unaffected.

Claims

1, the fixed centering paraffin scraper for sucker rod of screw type is characterized in that having several helical form boss (3) on the face of cylinder of its outer rim, between helical form boss (3) and the helical form boss (3) chute (4) was arranged.