CN2133666Y

CN2133666Y - Sucker rod with oil pumping function

Info

Publication number: CN2133666Y
Application number: CN 92204774
Authority: CN
Inventors: 马学山; 郭士忠; 裴旭军
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-03-21
Filing date: 1992-03-21
Publication date: 1993-05-19
Anticipated expiration: 2002-03-21

Abstract

The utility model provides a pumping rod with an oil pumping function, which is an oil extraction device used for exploiting underground crude oil in a well in oil industry. The utility model is connected between general oil pumping rods or at the lowest ends of the general oil pumping rods in series to be matched with a foot valve or a tapping valve on a mine mouth. The pumping rod with an oil pumping function can replace a down-hole pump to pump oil (oil can be pumped only by using the pumping rod of the utility model without using a pump). Pumping efficiency can be improved and tapping amount can be increased by adding the pumping rod of the utility model on the pump when the down-hole pump is ineffective or has low efficiency. Thereby, the utility model can be used as an auxiliary pumping device of the down-hole pump. The pumping rod of the utility model also has the characteristics of simple construction, easy manufacture and low cost. Thus, the pumping rod with an oil pumping function is a novel oil extraction device in the well.

Description

Sucker rod with oil pumping function

The utility model is to belong to oil recovery device in a kind of well that is used for recovery of subterranean crude oil in the petroleum industry.

At present, the sucker rod pumping amount accounts for more than 85% of mechanical oil recovery amount in the petroleum industry.Traditional sucker rod pumping, its sucker rod is just as the transmission of power and the setting element of pump.With sucker rod ground oil pumping machinery is linked up with down-hole reciprocating pump plunger, make the plunger of pump realize the oil pumping function with machinery reciprocating motion on the landing ground.Sucker rod of the present utility model promptly is the transmitting element of power, and itself also has the function of oil well pump and centralizer.

Sucker-rod pumping technology must be pump down to target zone position, shaft bottom, and following pump, inspection pump, construction are taken a lot of work, time-consuming, effort.The processing technology of pump is strict, and manufacturing cost is higher.When pump surpasses 2000 meters deeply,, influence pump efficiency and improve because lifting liquid is annotated the serious and sucker rod elastic deformation of high leakage.

The utility model is low at the deep well pump pump efficiency, following pump and inspection pump construction cost height, take a lot of work, time-consuming, the effort contradiction designed sucker rod with oil pumping function.Be serially connected between the conventional sucker rod this patent device is a plurality of, use, just can improve pump efficiency, the increase lifting rate as exhausting-aid device.

With this patent combination of devices, be connected on conventional sucker rod bottom, add " exhausting-aid device " combination, cooperate bottom valve or ground tapping valve to use, can use as the down-hole deep well pump, realize only just can pumping with the sucker rod that this patent provides without deep well pump.Can reduce the oil pumping cost, increase lifting rate.

The utility model sucker rod has following feature:

Sucker rod with oil pumping function is that centralizer is fixed on the sucker rod, centralizer and elasticity activity valve gap is combined together be combined into one with oil pipe and be equivalent to the pump barrel piston of reciprocating pump, mechanism's combination of tapping valve.Because the external diameter of centralizer is slightly less than pipe aperture, centralizer is combined into not isometrical concentric Cylinder with sucker rod.Be lowered in the oil pipe, sucker rod is set upright in the oil pipe center.Centralizer is the round ring shape, has through hole on its cross section, and the upper surface is a smooth flat, and movable valve gap covers also can be up and down on the upper surface.The beam hanger two ends are processed as sucker rod standard screw thread, cooperate with the rod collar screw thread, and tight with the tight nut back of the body of the back of the body, prevent to thread off.With being lowered in the oil pipe after this utility model sucker rod and the combination of conventional sucker rod, form oil production equipment in the novel well.

Description of drawings:

Accompanying drawing, expression has the sucker rod structure of oil pumping function.It carries on the back tight nut 2 by sucker rod 1, centralizer 3, and movable valve gap 4 is formed.Sucker rod 1 is not isometrical concentric Cylinder.The major diameter Cylinder is processed with male thread, and standard universal sucker rod male thread is processed at two ends.Centralizer 3 usefulness metals or nonmetal erosion resistant material are made, and the cross section has the garden ring cylinder of through hole.The upper surface is a smooth flat.The lower surface is for reducing the resistance fillet.Its external diameter is slightly less than tubing diameter, and internal diameter has internal thread to cooperate with sucker rod 1 big external screw thread, is tightened on the sucker rod 1.Movable valve gap 4 is made for having elastomeric material, and its lower surface is a smooth flat, is enclosed within on centralizer 3 upper surfaces of sucker rod 1.Cover when sucker rod is up on the centralizer upper surface, two smooth flat form sealing.

Embodiment: after oil pipe cleans up, check that oil pipe has or not distortion, do not have distortion and can be lowered to the sucker rod combination that is connected to the utility model sucker rod.1) " exhausting-aid device " as down-hole pump uses.Low or need not examine pump when losing efficacy when the down-hole pump pump efficiency, the part sucker rod is proposed, several groups of these utility model sucker rods are connected between the conventional sucker rod below the well fluid level, can increase the lifting rate of original inefficacy pump.2) use as alternative down-hole pump.Pump is not descended in the shaft bottom, and several groups of these utility model sucker rods are serially connected in conventional sucker rod bottom.Add " exhausting-aid device " on top, cooperate down-hole bottom valve or well head tapping valve, just can realize not having the down-hole pump oil pumping.And lifting rate is big; Can also make speciality stroke oil well pump and use (because of no pump barrel, length of stroke no longer are subjected to the pump barrel length restriction).

Action principle: the starting oil pumper, when sucker rod is up,, seal through hole and oil pipe annular gap because the fluid column action of gravity is enclosed on centralizer 3 upper surfaces moving valve 4 distendings and seat, oil can not be fallen.Compression valve covers space liquid makes its pressure rising back down the well head tapping valve, and oil is lifted to ground, finishes the discharge opeing process.When sucker rod was descending, bottom valve or well head tapping valve were closed, and moving valve covers the space and increases, and pressure reduces, and made oil by through hole on the centralizer, valve gap and sucker rod, and the gap between the oil pipe enters the space on the valve gap, finishes the imbibition process.When sucker rod is up again, begin a new discharge opeing process again.

Claims

1, is used for recovering the oil in the well, sucker rod with oil pumping function it is characterized in that being fixed with on the sucker rod (1) have centralizer, the centralizer (3) of swabs, three kinds of functions of movable valve seat, cooperation activity valve gap (4) action can realize aspirating the discharge opeing function when pumping in oil pipe.

2, according to the said sucker rod with oil pumping function of claim 1, its feature also is and can independent or a plurality of combinations be serially connected between the conventional sucker rod, as the exhausting-aid device use of down-hole pump.

3, according to the said sucker rod with oil pumping function of claim 1, many groups are connected in series combination, are connected on conventional sucker rod bottom, with top " exhausting-aid device " combination, cooperate bottom valve or the coordination of well head tapping valve again, can do the down-hole and not have pump oil pumping application.The function of alternative downhole pump.

4, make for the tool elastomeric material according to the said movable valve gap of claim 1 (4), obturating cup that can be movable, when sucker rod was up, head of liquid was enclosed on centralizer (3) upper surface valve gap distending seat, blocks the annular gap of through hole and centralizer and oil pipe.

5, have a swabs according to claim 1 is said, the centralizer (3) of centralizer, three kinds of functions of movable valve seat is to make of the metal of erosion resistant or nonmetals, is fixed on the sucker rod (1), and the cross section has the concentric Cylinder of through hole.Its diameter is slightly less than pipe aperture.Upper surface and movable valve gap lower surface form sealing.

6, connect with conventional rod collar according to said sucker rod (1) two ends of claim 1, also tighten, prevent to thread off with the tight nut of the back of the body (2) with oil pumping function.