CN2289074Y

CN2289074Y - Oil-well pump device

Info

Publication number: CN2289074Y
Application number: CN 96219471
Authority: CN
Inventors: 赵全堂; 刘成湧; 刘全文
Original assignee: MOLONG GROUP CORP SHANDONG
Current assignee: MOLONG GROUP CORP SHANDONG
Priority date: 1996-10-09
Filing date: 1996-10-09
Publication date: 1998-08-26
Anticipated expiration: 2006-10-09

Abstract

The utility model relates to an oil-well pump device provided with a pump barrel (22), a bottom valve (34), a plunger (32) and a movable valve (33). The utility model is characterized in that the upper end of the pump barrel (22) is provided with internal threads for enlarging the diameter of the pump, a connecting-tripping device and a drip, wherein, the drip is provided with an outer sleeve (6) provided with a hole (8) and connected with the pump barrel (22), and a sliding sleeve (5) is arranged in the outer sleeve. When the sliding sleeve is lifted up, the hole (8) can be communicated, and stored oil in an oil tube can be dripped. The connecting-tripping device is provided with a clamping shaft (11) provided with a slot and connected with a sucker rod (1), a connecting cylinder (21) arranged outside the clamping shaft and connected with the plunger (32), and a lock block (17) in a hole of the connecting cylinder; an upper joint (13) with a slot (16) inside is arranged outside the connecting cylinder. When the lock block (17) is clamped in or not clamped in the slot of the clamping shaft, the connecting cylinder (21) can be connected with or disengaged from the clamping shaft (11), and the plunger can be connected with or disengaged from the pumping rod. The utility model is convenient for the work of oil production.

Description

Oil-well pump device

The utility model relates to pump, particularly relates to being specifically designed to pump or the pumping installations that promotes liquid from depths very.

The oil-producing well in oil field, reduce and can not blowing the time in formation pressure, then need use the oil well pump of pumping unit and down-hole to pump and produce oil, oil well pump has a pump barrel that is connected in the oil pipe bottom, the pump barrel bottom has a bottom valve, has a piston mobile that moving valve is housed in the pump barrel, and piston links to each other with sucker rod, sucker rod is then driven and is moved up and down by pumping unit, thereby piston moves up and down in pump barrel and forms a positive displacement pump and crude oil is promoted to ground.This oil well pump limits because of being subjected to tubing diameter, and the pump footpath is little, oil output is low, simultaneously because of gassiness in the well liquid, contains sand, often cause the accident of pump, as pump barrel and seizure of piston or wearing and tearing, defective valve etc., thereby can not work, then need that pump is proposed oil well this moment and clean or change, and when playing pump, because bottom valve, moving valve can not be opened, and the fluid on the pump in the tubing string can't discharge, all discharge from well head, operation inconvenience and pollution well head have also increased a pump load and a running cost.

The purpose of this utility model provides and a kind ofly can increase the oil well pump diameter under same tubing diameter, and sucker rod can be connected or throw off with pump piston in the down-hole, and can when playing oil pipe the fluid in the oil pipe be let out the oil-well pump device that removes.

Another purpose of the present utility model provides a kind of as above-mentioned purpose, and has additional moving valve to increase the oil-well pump device of the sealing of moving valve.

The purpose of this utility model realizes by following technological scheme, oil-well pump device has the pump barrel that is connected in the oil pipe bottom, the bottom valve of pump barrel bottom, be connected in the piston of sucker rod and the moving valve on the piston in the pump barrel, it is characterized in that pump barrel and piston top also are connected with connecting-and-unconnecting device and oil drainer, the upper end of pump barrel has the internal thread in order to connect;

Said oil drainer comprises the overcoat that is connected between oil pipe and the pump barrel, sliding sleeve in the overcoat, sealing between overcoat and the sliding sleeve, pull bar that is connected with sucker rod and joint in the sliding sleeve have put through hole outward, and there is the stop platform inside, on sliding sleeve, move, expose in the hole, and then the oil in the oil pipe can be let out to the overcoat outside, and the stop platform can not fall sliding sleeve;

Said connecting-and-unconnecting device comprises the pull bar box cupling that links to each other with piston pulling rod on the piston, the extend neck of box cupling upper end, 2-4 square hole arranged on the extend neck, the square lock dog of thickness greater than extend neck thickness arranged in the hole, the inner spring that slidably bushing is arranged in the extend neck and bushing is made progress, the outer spring that between overcoat and extend neck, slidably upper connection is arranged and upper connection is made progress, the groove that can hold lock dog is arranged in the upper connection, vertical oil groove is arranged so that fluid upwards flows outward, also has the axis that is connected in said pull bar, the axis bottom can be stretched in the extend neck, and the groove that can hold lock dog is arranged on the axis external diameter, carries on axis, when lock dog reaches the groove place of upper connection, the lock dog internal diameter increases and extend neck and axis is unclamped, and axis can propose, when axis stretches into extend neck, and it is descending to push away the relative upper connection of extend neck, then lock dog enters in the groove of axis, thereby extend neck and axis are linked together, thereby reaches sucker rod and piston disengagement or purpose of connecting.

On piston top upper travelling valve can be housed, it is connected with connecting-and-unconnecting device, upper travelling valve comprises the trip valve seat that is fixed in the piston upper end, the piston pulling rod that passes trip valve seat center and link to each other with the piston pulling rod box cupling, ball is read in the trip of being fixed in the piston pulling rod lower end, when sucker rod descending, the piston pulling rod box cupling leans against piston top and makes descent of piston, when sucker rod up, the trip valve ball be sitting in the trip valve seat on and make piston stroking upward, increased moving valve, reduced leakage, and the sand grains in the sealing surface can be extruded or squeeze broken, improved the reliability of sealing.

For easy for installation, overcoat can be divided into the number joint and link together then.

Oil-well pump device of the present utility model because pump barrel adopts internal thread to connect, can make pump directly strengthen, has connecting-and-unconnecting device, can make sucker rod be connected or throw off in the down-hole easily, reduce the pump number of times with piston, very convenient to the oil well operation, and has an oil drainer, when playing pump, can avoid well head greasy dirt and befouling environment, and have this oil-well pump device of upper travelling valve, then also increase sealing, increased output.

Below, in conjunction with the accompanying drawings and embodiments, oil-well pump device of the present utility model is described in detail.

Fig. 1 is the structural drawing of first kind of scheme of the utility model oil-well pump device;

Fig. 2 is the structural drawing of second kind of scheme of the utility model oil-well pump device.

As Fig. 1, this oil-well pump device has the pump barrel 22 of oil pipe 3 bottoms, and bottom valve 34 is arranged at the pump barrel bottom, and the piston 32 that is connected in the sucker rod bottom is arranged in the pump barrel 22, and valve 33 is arranged on the piston, and pump barrel 22 and piston 32 tops also are connected with connecting-and-unconnecting device and oil drainer.

Said oil drainer comprises an overcoat 6, and it is connected between oil pipe 3 and the pump barrel 22, it can with the pump barrel direct connection, also can be as figure, box cupling 10 and pipe nipple 14 by connecting-and-unconnecting device link with pump barrel, and pump barrel 22 links to each other with overcoat 6 or pipe nipple 14 with internal thread, so can increase the internal diameter of pump barrel.Through hole 8 is arranged on the overcoat 6, have slidably sliding sleeve 5 in the overcoat, sealing 7 is arranged between overcoat and the sliding sleeve, on overcoat 6 or the box cupling 10 the stop platform is arranged, make the sliding sleeve can landing, have pull bar 4 in the sliding sleeve, its upper end has joint 2 to link to each other with sucker rod 1, the lower end then with take off parallel operation and link to each other.

Connecting-and-unconnecting device comprises that aforesaid upper end links to each other with overcoat 6, lower end and pump letter 22 box cuplings that link to each other 10 and pipe nipple 14, have in it and be connected with piston pulling rod 28 and at the piston pulling rod box cupling 26 on piston pulling rod top, piston pulling rod 28 links to each other with the link 27 that is connected in piston 32 tops, porose on the link 27, be interlinked to the outside in making, box cupling 26 tops are connected with lower contact 25, lower contact 25 tops then are connected with (as using screw thread and pin 24) extend neck 21, the cloth in garden week has a 2-4 hole on the extend neck, be placed with lock dog 17 in the hole, hole and lock dog are preferably square, lock dog can not be rotated, the thickness of lock dog 17 is greater than the wall thickness of extend neck, the extend neck upper end can be connected with stop collar 12 (as using screw thread and stop pin 15), so that install, have bushing 19 and inner spring 20 that limit dais is slidably arranged in the extend neck, the elastic force of spring 20 makes bushing 19 upwards, between pipe nipple 14 and the extend neck 21 slidably upper connection 13 is arranged, there is outer spring 18 the upper connection below, its elastic force makes upper connection upwards, on the upper connection cylindrical longitudinal groove is arranged so that oily stream passes through, on the interior circle circular groove 16 wide with lock dog arranged, lock dog 17 can enter in this groove and make the internal surface of lock dog equal with the internal surface of extend neck 21, the axis 11 that also comprises the connecting-and-unconnecting device of the lower end that is connected in pull bar 4, the diameter of axis bottom equates with the internal diameter that connects letter 21 and can stretch in the extend neck, the end has the tapering part of guiding, the axis outside has the circular groove wide with lock dog, when lock dog enters this groove, then the outside of lock dog 17 is equal with the external diameter of extend neck 21, axis 11 outsides have frustum to be abutted against mutually with the interior frustum of stop collar 12 (or extend neck), and stop collar 12 (or extend neck) is outer to have platform to be abutted against mutually with the interior platform of upper connection 13.When axis 11 outer steps lean on mutually with the upper end of stop collar 12, when the step in the upper connection 13 also leans on mutually with the outer step of stop collar 12, the hole coordination of the lock dog 17 on groove on the axis 11 and the extend neck 21 and below the groove 16 of upper connection 13 (position as shown in Figure 1), this moment axis 11 with connect simple 21 and be connected.

The working principle of connecting-and-unconnecting device is as follows:

During assembling, axle 11 is not installed earlier, with pump barrel 22, bottom valve 34, piston 32, other parts of oil drainer overcoat and connecting-and-unconnecting device all install, in the assembling,, make groove 16 arrive the hole on the extend necks 21 and the position of lock dog 17 with upper connection 13 compression outer springs 18 (or on push away extend neck 21), bushing 19 is simultaneously exercised lock dog 17 on relatively and is entered in the groove 16 under inner spring 20 effects, the last again enforcement limit dais of bushing leans on mutually with the step of extend neck 21 and lock dog 17 can not deviate to the center, the pump barrel of can pumping like this, piston, connecting-and-unconnecting device (not being with axis 11), oil drainer (not being with sliding sleeve 5) is together down to the down-hole.

Axis 11 then, pull bar 4, sliding sleeve 5 is together gone into the well with sucker rod 1, the inclined-plane of axis 11 ends at first contacts the end face of bushing 19 and makes it to move down, when the groove of axis 11 arrives lock dog 17 places, in the upper end of stop collar 12 frustum just in time with the frustum rank closing mutually on axis 11 tops, the power of upper connection 13 outer springs 18 is upwards moved and lock dog 17 is pressed in the groove of axis 11, upper connection 13 is up again, step in it is abutted against mutually with the outer step of stop collar 12 (or extend neck), then lock dog 17 has moved to the below of groove 16 and can not eject (as shown in Figure 1) again, and extend neck 21 is locked mutually with axis 11, finish the work that the down-hole engages, make sucker rod descending again, sliding sleeve 5 is pushed up extremely hole 8 closing positions with joint 2.

When need are thrown off, on carry sucker rod 1, rising to certain position, upper connection 13 is hindered by the step in overcoat 6 or the box cupling 10, carry sucker rod in the continuation, outer spring 18 is compressed and extend neck 21 and upper connection 13 generation axial displacements, when lock dog 17 reaches the position of groove 16, lock dog 17 inner round top rades are stretched in the groove 16 by the thrust of axis 11, thereby axis 11 and extend neck 21 are no longer locked, simultaneously inner spring 20 makes bushing 19 move and lock dog can not be moved inward with axis one is the same, thereby finish and break away from action, on again, to carry, axis 11 upper ends make to be moved on the sliding sleeve 5 of oil drainer and blind hole 8 no longer, oil in the oil pipe can be released, carry on again and can continue to propose sucker rod.

As not playing oil pipe, sucker rod has only been proposed, again during lower sucker rod, available joint 2 with sliding sleeve 5 push up to desired location can blind hole 8.

Fig. 2 shows second kind of scheme of oil-well pump device of the present utility model, sand etc. is poorly sealed closely to be leaked thereby influences the oil pumping amount because of containing for fear of moving valve 33, can have upper travelling valve on the piston 32, it comprises the trip valve seat 29 that is fixed in piston 32 tops with link 27, link to each other with piston pulling rod box cupling 26 and pass the piston pulling rod 28 at trip valve seat 29 centers, be fixed in the trip valve ball 31 of piston pulling rod 28 lower ends, distance between trip valve ball 31 and the piston pulling rod box cupling 26 is greater than the distance of trip valve seat 29 lower end surfaces and link 27 upper-end surfaces, when sucker rod is descending, the lower end surface of box cupling 26 pushes away link 27 upper-end surfaces, makes piston 32 descending, and upper travelling valve 31 is opened simultaneously, when sucker rod 1 up, trip valve ball 31 is sitting on the trip valve seat 29, and makes piston 32 up, the upper travelling valve sealing, and play the effect that increases a moving valve, because upper lifting force is bigger, be enough to extrude or squeeze broken with squeezing sand grains in sealing surface, improved the reliability of sealing, reduce the leakage rate of moving valve, improved pump efficiency.

Oil-well pump device of the present utility model owing to have connecting-and-unconnecting device, can make sucker rod be connected or throw off in the down-hole with pump piston, thereby can not play piston, and only play sucker rod, simplified a pump, well-flushing, sand washing operation greatly, pump barrel links with internal thread and overcoat simultaneously, and internal diameter is increased, thereby has increased the working diameter of pump, has oil drainer, can make to deposit in the oil pipe to receive to leak into well head, purify the well head working environment, also have upper travelling valve, reduce the leakage of pump, improved output.

Claims

1, a kind of oil-well pump device, has the pump barrel (22) that is connected in the oil pipe bottom, the bottom valve of pump barrel bottom (34), be connected in the piston (32) of sucker rod (1) and the moving valve (33) on the piston in the pump barrel, it is characterized in that pump barrel (22) and piston (32) top also are connected with connecting-and-unconnecting device and oil drainer, the upper end of pump barrel has the internal thread in order to connect;

Said oil drainer comprises the overcoat (6) that is connected between oil pipe (3) and the pump barrel (22), sliding sleeve (5) in the overcoat, the sealing between overcoat and the sliding sleeve (7), pull bar (4) that is connected with sucker rod (1) and joint (2) in the sliding sleeve, put through hole (8) outward, there is the stop platform inside;

Said connecting-and-unconnecting device comprises the piston pulling rod box cupling (26) that links to each other with piston pulling rod (28) on the piston, the extend neck (21) of box cupling (26) upper end, 2-4 square hole arranged on the extend neck, the square lock dog (17) of thickness greater than extend neck thickness arranged in the hole, the inner spring (20) that slidably bushing (19) is arranged in the extend neck and bushing is made progress, the outer spring (18) that slidably upper connection (13) is arranged between overcoat (6) and extend neck (21) and upper connection is made progress, the groove (16) that can hold lock dog (17) is arranged in the upper connection (13), oil groove is longitudinally arranged outward, also have the axis (11) in the stretched into extend neck that is connected in said pull bar (4), the groove that can hold lock dog (17) is arranged on the axis external diameter.

2, oil-well pump device as claimed in claim 1, it is characterized in that under said overcoat (6), also being connected with the pipe nipple (14) that box cupling (10) is connected with internal thread with pump barrel (22), said stop platform is arranged in the box cupling (10), said upper connection (13) is arranged in the pipe nipple (14).

3, oil-well pump device as claimed in claim 1 or 2, it is characterized in that between piston (32) and connecting-and-unconnecting device (23), also having upper travelling valve, it comprises the trip valve seat (29) that is fixed in piston (32) upper end, pass the piston pulling rod (28) of swimming the valve seat center and linking to each other, be fixed in the trip valve ball (31) of piston pulling rod lower end with piston pulling rod box cupling (26).