CN200952463Y - Hanging immersed thickened oil pump - Google Patents

Abstract

The utility model discloses a hanging immersion-type high-viscosity oil pump which belongs to oil exploration equipment in petroleum mechanical exploration field. The pump consists primarily of an upper plunger, a joint, a lower plunger, an oil outlet joint, an upper pump cylinder assembly, a spherical center-adjusting assembly, an oil inlet valve, and an oil outlet valve. The hanging immersion-type high-viscosity oil pump in the utility model omits connecting-tripping device and oil drainer, is convenient for immersing and lifting, can drain oil automatically, can be connected with a weight bar to improve applicability to viscous oil exploration, and is favorable for well-site environment protection.

Description

Hang the immersion thick oil pump

Technical field

The utility model belongs to petroleum industry machine instruction statement mining oil production equipment, refers more particularly to a kind of tubular type thick oil pump that is applicable to thickened oil recovery.

Background technique

At present, the most frequently used rod pumping pump of thickened oil recovery has two types, one class is a hydraulic pressure feedback suction pump series, as long stroke hydraulic feedback oil well pump (ZL02228867.8) and hydraulic pressure feedback suction pump (ZL89201356.7), another kind of is immersion suction pump series, as immersion suction pump (ZL90210980.4) and plunger suspending weight formula oil well pump (ZL00256652.4), this suction pump of two types all is to adopt the pump barrel and the plunger of two kinds of different-diameters to be connected in series, the annular chamber suction crude oil that utilizes big or small pump barrel to form equally all has the hydraulic pressure feedback force and acts on and help plunger descending on the small plunger cross section.The structural feature of long stroke hydraulic feedback oil well pump and hydraulic pressure feedback suction pump is that big pump is last; little pump is down; do not need to join connecting-and-unconnecting device; following pump operation is convenient; and draining automatically when playing the pump operation; pump chamber was by the inner chamber oil-feed of long-plunger or center tube when deficiency was upstroke; runner is little and grow; the oil-feed resistance is big, and when stroke is longer or oil when thicker, it is poor the pump full level to occur; up load is big; the phenomenon that pump efficiency is low, and hydraulic pressure feedback suction pump also exists pump length long, the deficiency of difficult realization long stroke; The characteristics of immersion suction pump and plunger suspending weight formula oil well pump are that little pump is last, big pump is following, and pump chamber is by the inner chamber oil-feed of pump short column plug down during down stroke, and runner is lacked greatly, the oil-feed resistance is little, but plunger assembly can not be deviate from pump barrel, must cooperate connecting-and-unconnecting device to use, following pump operation is complicated, the rate of fault height, direct draining when playing the pump operation, this causes the application of immersion suction pump to be restricted.

Summary of the invention

The purpose of this utility model provides a kind of pump barrel assembly, upper and lower plunger etc. gone up all can propose oil well with rod string, does not need to use connecting-and-unconnecting device, and direct draining when playing pump can connect weighted lever under the pump, be more suitable for the suspension immersion suction pump of thickened oil recovery.

The purpose of this utility model is achieved in that a kind of suspension immersion thick oil pump, comprise upper plug 2, joint 18, lower plunger 19, lower plunger joint 20, upper plug 2 tops are provided with delivery connection 1, last pump barrel assembly 7 mass activities are socketed on the periphery of upper plug 2, upper plug 2 bottoms are connected with outlet valve 32 by upper plug joint 9, and outlet valve 32 bottoms are provided with spherical aligning assembly 14, and spherical aligning assembly 14 bottoms connect oiling valve 33, lower plunger 19, lower plunger joint 20 successively; Following pump barrel 13 two ends connect the pump barrel box cupling and connect 8, and the upper end connects extension nipple 6, tubing coupling 5 more successively, supports skin Kong bowl joint 4, becomes the pump steady job tube that snapping head 3 is formed.Last pump barrel assembly 7 by leather cup axle 21, leather cup 22, leather cup seat ring 23, leather cup pressure cap 24, leather cup in leather cup axle 21 outsides support box cupling 25 and on pump barrel 26 and last pump barrel joint 27 form.Leather cup 22 adopts nonmetallic material to make, and outside dimension adopts interference fit.Spherical aligning assembly 14 between upper plug 2 and the lower plunger 19 adopts the form of sphere and cone match, constitutes turning joint.The lower end of pump can connect weighted lever.Outlet valve 32 by oil-release valve cover 10, with go out the delivery valve seat 12 that valve oil cover 10 matches, and the fuel-displaced valve balls in the delivery valve seat 12 11 are formed.Oiling valve 33 is by oil-feed valve bonnet 15, the oil-feed valve seat 17 that matches with oil-feed valve bonnet 15, and the oil-feed valve balls in the oil-feed valve seat 17 16 are formed.

Suspension immersion thick oil pump provided by the utility model need not joined connecting-and-unconnecting device, need not join oil drainer; not only descend pump, to play the pump operation simple and convenient, and draining automatically can connect weighted lever under the pump; better be applicable to the exploitation of viscous crude, help the well site environmental protection.

Description of drawings

Below in conjunction with the drawings and specific embodiments the utility model is described in further detail.

Fig. 1 is a structural representation of the present utility model.

Fig. 2 is a pump barrel modular construction schematic representation on the utility model.

Fig. 3 is the spherical aligning modular construction of a utility model schematic representation.

Embodiment

In the utility model, supporting leather cup joint 4 is parts cylindraceous, respectively there is the step conical surface at the endoporus two ends, two ends have male thread, by the upper end certain position of scyewed joint at following pump barrel 13, with extension nipple water, following pump barrel 13 parts such as grade are formed the steady job tube, last pump barrel is not to be fixed by threaded connection on following pump barrel, but form pump barrel assembly 7 with the leather cup device, movable is enclosed within on the upper plug 2, when going into the well work, goes up by pump the pump barrel assembly with rod string servant pit shaft, in leather cup supported joint 4, the outer step male cone (strobilus masculinus) on leather cup axle 21 tops is fitted to form with supporting leather cup axle 21 top inner conical surfaces and is hung fixing seal by the leather cup device card.When the needs pump detection and workover, on carry rod string and can propose the steady job tube going up pump barrel assembly 7 and upper and lower plunger 2, the 19 grades part of moving about, play on the ground.The lower end of lower plunger 19 is connected with a lower plunger joint 20, and the lower end of lower plunger joint 20 has box thread, can connect the weighted lever of certain-length under the pump during well operations herein, and to overcome the viscous crude resistance descending smoothly for pulling rod string and plunger during the pump down stroke.

Leather cup axle 21 in the last pump barrel assembly 7 is drums of a hollow, one or both ends band male thread is buckled, wedge slot of the outstanding and downward formation in garden outside the top, wedge slot top also has a step conical surface, leather cup is the non-metal workpiece of garden ring-type, the tab-like wedgewise in top, outer garden and angle, garden, lower end surface are excessive, external diameter is bigger slightly than the internal diameter of supporting leather cup joint 4, one or more leather cups are enclosed within on the little outer garden of leather cup axle 21, compressed by leather cup seat ring 23, leather cup pressure-pad 24, the leather cup upper end is stuck in the wedge slot of leather cup axle 21.Connect leather cup axle 21 and last pump barrel 26 by leather cup supporting box cupling 25, leather cup axle 21 can be connected in the top or the bottom of pump barrel, also can respectively connect a leather cup axle 21 at the upper and lower end of last pump barrel.Fuel inlet fitting 28 two ends in the spherical aligning assembly 14 have male thread, open 4 uniform skewed slots and endoporus conducting on the face of outer garden, one end connects oil-release valve cover 10 and compresses delivery valve seat 12, the other end connects aligning box cupling 29, aligning box cupling 29 is cylindric parts, and an end endoporus shrinks and forms a step conical surface.Movable bulb 30 1 ends are a spheroid, the other end is from the extended round shank of bulb, pommel has male thread, the pommel of movable bulb 30 passes from aligning box cupling 29 endoporus, spheroid hangs on the cone step, pommel scyewed joint aligning joint 31, the scyewed joint oil-feed valve bonnet 15 of aligning joint 31 the other ends.The spheroid of movable bulb 30 and aligning box cupling 29 leave the gap between radially, also leave certain interval between the end face of aligning box cupling 29 and aligning joint 31, to guarantee that the aligning assembly has bigger regulation range, aligning bulb 31 adopts the form that articulates of the sphere and the conical surface to make the bearing capacity of aligning assembly bigger with aligning box cupling 29.

Working principle of the present utility model is as follows:

Under the pump during well operations, the same with conventional oil well pump earlier with pump steady job tube with precalculated position under the tubing string lower going-into-well, the part of again pump being moved about is lowered in the oil pipe with rod string, during to predetermined depth, pump moves about and partly enters in the pump steady job tube, roofbolt continues to be lowered to, bump pump during to delivery connection 1 lower end surface contact leather cup axle 21 upper-end surfaces, utilize the weight of rod string leather cup 22 all to be pressed in the endoporus of supporting leather cup joint 4, the step male cone (strobilus masculinus) on leather cup axle 21 tops is fitted with supporting leather cup joint 4 top inner conical surfaces, the clamping force that last pump barrel assembly 7 just relies on the interference fit between leather cup 22 and the supporting leather cup joint 4 to form is fixed in the steady job tube of pump, and oil pipe and annular pump chamber also are sealed simultaneously.At this moment, upper and lower plunger 2,19 can be in upper and lower pump barrel operation up and down reciprocatingly, spherical aligning assembly 14 can compensate between the upper and lower pump barrel and upper and lower post 2,19 plugs between nonconcentricity, make the plunger operation more freely, prevent eccentric wear, reduce resistance.When playing well operations, goes up by pump the shadoof post, the lower end surface that makes upper plug joint 9 upper-end surfaces bump go up pump barrel joint 27, leather cup 22 deviates to support leather cup joint 4, last pump barrel assembly 7 deblockings, along with carrying in the rod string continuation, the whole part of moving about is suggested working barrel, and the pump chamber of steady job tube is communicated with the shaft bottom, the automatic draining of pump prevents to pollute the well site.

Pump oil pumping principle is to utilize the Volume Changes suction crude oil of the annular space of upper and lower pump diameter difference formation, when pump during at down stroke, the annular pump cavity volume increases pressure and reduces, outlet valve 32 cuts out, oiling valve 33 is opened, and crude oil enters annular pump chamber under the effect of submergence pressure and the descending inertial force of plunger.Because big pump is in the bottom, and pump is in the down stroke oil-feed, so the oil-feed resistance is very little, during down stroke, the outlet valve 32 on pump top cuts out, and liquid load just acts on the cross section of upper plug 2 in the oil pipe, form downward hydraulic pressure feedback force, overcome the viscous crude resistance and help plunger descending.

Can connect weighted lever under the pump, weighted lever pulling rod string and last lower plunger 2,19 are descending, and rod string, valve rod, plunger only are subjected to pulling force, are not stressed, and have reduced sucker rod and valve rod bending deflection, thereby have reduced the descending resistance of roofbolt.The crude oil of annular pump chamber is discharged in the oil pipe by outlet valve 32 when the pump up stroke, prolongs tubing string and rises to ground, and going round and beginning again so just gives rise to ground with crude oil.

Claims (7)

1, a kind of suspension immersion thick oil pump, comprise upper plug (2), joint (18), lower plunger (19), lower plunger joint (20), upper plug (2) top is provided with delivery connection (1), it is characterized in that: go up pump barrel assembly (7) mass activity and be socketed on the periphery of upper plug (2), upper plug (2) bottom is connected with outlet valve (32) by upper plug joint (9), fuel-displaced ball valve (32) bottom is provided with spherical aligning assembly (14), and spherical aligning assembly (14) bottom connects oiling valve (33), lower plunger (19), lower plunger joint (20) successively; Following pump barrel (13) two ends connect the pump barrel box cupling and connect (8), and the upper end connects extension nipple (6), tubing coupling (5) more successively, supports skin Kong bowl joint (4), becomes the pump steady job tube that snapping head (3) is formed.

2, suspension immersion thick oil pump according to claim 1 is characterized in that: last pump barrel assembly (7) supports box cupling (25) and last pump barrel (26) and last pump barrel joint (27) by leather cup axle (21), the leather cup (22) in leather cup axle (21) outside, leather cup seat ring (23), leather cup pressure cap (24), leather cup and forms.

3, suspension immersion thick oil pump according to claim 2 is characterized in that: leather cup (22) adopts nonmetallic material to make, and outside dimension adopts interference fit.

4, suspension immersion thick oil pump according to claim 1 and 2 is characterized in that: the spherical aligning assembly (14) between upper plug (2) and the lower plunger (19) adopts the form of sphere and cone match, constitutes turning joint.

5, suspension immersion thick oil pump according to claim 1 and 2, it is characterized in that: the lower end of pump can connect weighted lever.

6, suspension immersion thick oil pump according to claim 1 and 2, it is characterized in that: outlet valve (32) by oil-release valve cover (10), with go out the delivery valve seat (12) that valve oil cover (10) matches, and the fuel-displaced valve ball (11) in the delivery valve seat (12) is formed.

7, suspension immersion thick oil pump according to claim 1 and 2, it is characterized in that: oiling valve (33) is by oil-feed valve bonnet (15), the oil-feed valve seat (17) that matches with oil-feed valve bonnet (15), and the oil-feed valve ball (16) in the oil-feed valve seat (17) is formed.

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