CN204804784U - Suspension type oil -well pump - Google Patents

Abstract

The utility model relates to a suspension type oil -well pump is provided with the outer tube of passing a bridge on oil pipe's the outer wall, installs on the outer tube of passing a bridge and is provided with the filling valve, be provided with the pump barrel assembly in oil pipe's the inner wall, the traveling valve is installed to the upper end of pump barrel assembly, and the traveling valve is installed down to the lower extreme of pump barrel assembly, and pump barrel assembly internally mounted has the plunger assembly, the bleeder is installed to oil pipe's lower extreme, and the standing valve is installed to the lower extreme of bleeder. Increased by the outer tube of passing a bridge on the basis of conventional pump, the filling valve dress is on the outer tube of passing a bridge, make weight such as oil column pressure and tail pipe be used in on the outer tube of passing a bridge, thereby the effectual pump barrel assembly of having protected, the load that the pump barrel assembly bore has been reduced, the pump barrel assembly by one end hang be fixed in oil pipe on, avoided bearing and hung the tail pipe, anchoring tail pipe anchor, sit the tensile force that seals the packer production and make the pump barrel take place undergauge or bending deformation, the pump setting depth has been increased, the life of oil -well pump has further been prolonged.

Description

A kind of suspension type oil well pump

Technical field

The utility model belongs to oil pump device field, particularly relates to a kind of suspension type oil well pump.

Background technology

At present, the selection of oil pump plunger piston and pump barrel process of surface treatment and material significantly can change the application life of oil well pump.Plunger and pump barrel are friction pairs, there are some researches show, whether plunger and the friction factor size between pump barrel surfacing and sand grains also can affect sand grains and can be stuck in plunger and pump barrel gap.Pump barrel is in long motion process.Can bear hang tail pipe, grappling tail pipe anchor, set packer produce tensile force and make pump barrel generation undergauge or flexural deformation, affect application life.

Utility model content

The utility model provides the suspension type oil well pump that a kind of structure is simple, easy to install, increase work efficiency for solving in known technology the technical problem that exists.

The technical scheme that the utility model is taked for the technical problem existed in solution known technology is:

This suspension type oil well pump comprises: gap bridge outer tube, assembly for plunger, pump barrel assembly, bleeder, standing valve, oil pipe, upward-traveling valves, lower travelling valve, inlet valve;

The outer wall of oil pipe is provided with gap bridge outer tube, gap bridge outer tube is provided with and is provided with inlet valve; Be provided with pump barrel assembly in the inwall of oil pipe, the upper end of pump barrel assembly is provided with upward-traveling valves, and the lower end of pump barrel assembly is provided with lower travelling valve, and pump barrel assembly inside is provided with assembly for plunger; The lower end of oil pipe is provided with bleeder, and the lower end of bleeder is provided with standing valve.

The utility model can also adopt following technical measures:

Described gap bridge outer tube is fixed on the outer wall of oil pipe in a hanging manner.

During upstroke, assembly for plunger promotes from extreme lower position, because the fluid pressure on oil pipe top is high, upward-traveling valves and lower travelling valve are closed, assembly for plunger is up, under the effect of pressure reduction, inlet valve is opened, and down-hole pressure orders about stratum liquid and is drawn in pump barrel assembly by inlet valve; During down stroke, oil liquid pressure orders about upward-traveling valves and lower travelling valve is opened, and fluid is from entering in oil pipe by assembly for plunger endoporus, and back and forth movement like this, well liquid is constantly transported to ground

The advantage that the utility model has and good effect are: this suspension type oil well pump is applicable to the operation of the oil well of hanging tool under pump, the oil well of hole condition complexity, deep-well, little Wells.The basis of conventional pumps adds a gap bridge outer tube; inlet valve is contained on gap bridge outer tube; the weight such as oil column pressure and tail pipe are made to act on gap bridge outer tube; thus effectively protect pump barrel assembly; decrease the load that pump barrel assembly bears; pump barrel assembly hangs by one end and is fixed on oil pipe; avoid bear hang tail pipe, grappling tail pipe anchor, set packer produce tensile force and make pump barrel generation undergauge or flexural deformation; increase pump setting depth, extend the application life of oil well pump further.

Accompanying drawing explanation

Fig. 1 is the structural representation of a kind of suspension type oil well pump that the utility model embodiment provides;

In figure: 1, gap bridge outer tube; 2, assembly for plunger; 3, pump barrel assembly; 4, bleeder; 5, standing valve; 6, oil pipe; 7, upward-traveling valves; 8, lower travelling valve; 9, inlet valve.

Detailed description of the invention

For summary of the invention of the present utility model, Characteristic can be understood further, hereby exemplify following examples, and coordinating accompanying drawing to be described in detail as follows: the module used by the utility model or unit all belong to known module or unit, when buying module or unit, are provided with software.There is not the innovation of software or method in the utility model.

Refer to shown in Fig. 1: this suspension type oil well pump comprises: gap bridge outer tube 1, assembly for plunger 2, pump barrel assembly 3, bleeder 4, standing valve 5, oil pipe 6, upward-traveling valves 7, lower travelling valve 8, inlet valve 9;

The outer wall of oil pipe 6 is provided with gap bridge outer tube 1, gap bridge outer tube 1 is provided with and is provided with inlet valve 9; Be provided with pump barrel assembly 3 in the inwall of oil pipe 6, the upper end of pump barrel assembly 3 is provided with upward-traveling valves 7, and the lower end of pump barrel assembly 3 is provided with lower travelling valve 8, and pump barrel assembly 3 inside is provided with assembly for plunger 2; The lower end of oil pipe 6 is provided with bleeder 4, and the lower end of bleeder 4 is provided with standing valve 5.

The utility model can also adopt following technical measures:

Described gap bridge outer tube 1 is fixed on the outer wall of oil pipe 6 in a hanging manner.

During upstroke, assembly for plunger 2 promotes from extreme lower position, because the fluid pressure on oil pipe 6 top is high, upward-traveling valves 7 and lower travelling valve 8 are closed, assembly for plunger 2 is up, under the effect of pressure reduction, make inlet valve 9 open, down-hole pressure orders about stratum liquid and is drawn in pump barrel assembly 3 by inlet valve 9; During down stroke, oil liquid pressure orders about upward-traveling valves 7 and lower travelling valve 8 is opened, and fluid is from entering in oil pipe 6 by assembly for plunger 2 endoporus, and back and forth movement like this, well liquid is constantly transported to ground

The advantage that the utility model has and good effect are: this suspension type oil well pump is applicable to the operation of the oil well of hanging tool under pump, the oil well of hole condition complexity, deep-well, little Wells.The basis of conventional pumps adds a gap bridge outer tube; inlet valve is contained on gap bridge outer tube; the weight such as oil column pressure and tail pipe are made to act on gap bridge outer tube; thus effectively protect pump barrel assembly; decrease the load that pump barrel assembly bears; pump barrel assembly hangs by one end and is fixed on oil pipe; avoid bear hang tail pipe, grappling tail pipe anchor, set packer produce tensile force and make pump barrel generation undergauge or flexural deformation; increase pump setting depth, extend the application life of oil well pump further.

The above is only to preferred embodiment of the present utility model, not any pro forma restriction is done to the utility model, every according to technical spirit of the present utility model to any simple modification made for any of the above embodiments, equivalent variations and modification, all belong in the scope of technical solutions of the utility model.

Claims (2)

1. a suspension type oil well pump, is characterized in that, this suspension type oil well pump comprises: gap bridge outer tube, assembly for plunger, pump barrel assembly, bleeder, standing valve, oil pipe, upward-traveling valves, lower travelling valve, inlet valve;

The outer wall of oil pipe is provided with gap bridge outer tube, gap bridge outer tube is provided with and is provided with inlet valve; Be provided with pump barrel assembly in the inwall of oil pipe, the upper end of pump barrel assembly is provided with upward-traveling valves, and the lower end of pump barrel assembly is provided with lower travelling valve, and pump barrel assembly inside is provided with assembly for plunger; The lower end of oil pipe is provided with bleeder, and the lower end of bleeder is provided with standing valve.

2. suspension type oil well pump as claimed in claim 1, it is characterized in that, described gap bridge outer tube is fixed on the outer wall of oil pipe in a hanging manner.