CN202645973U

CN202645973U - Protecting device under oil-extracting pump

Info

Publication number: CN202645973U
Application number: CN 201220205823
Authority: CN
Inventors: 马学庆
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-05-10
Filing date: 2012-05-10
Publication date: 2013-01-02
Anticipated expiration: 2022-05-10

Abstract

The utility model relates to a protecting device under an oil-extracting pump. The protecting device comprises an upper connector, a sand-preventing cylinder, an upper outer pipe, six sand-blasting pipes and a central pipe, wherein the central pipe is communicated with a middle connector; an outer diameter of the middle connector is fixedly connected with the lower end of the upper outer pipe; the lower outer diameter of the middle connector is fixedly connected with the outer diameter of a lower connector through a lower outer pipe; a spiral pipe which is communicated with the central pipe is arranged in the lower outer pipe; the spiral pipe comprises cylinder pipes at two ends and a specially shaped pipe in the middle; the cylinder pipes at two ends are respectively in rotating connection with the middle connector and the lower connector through upper and lower bearings; an impeller is fixedly mounted on the cylinder pipe at the upper end; a plurality of outer oil inlets are arranged opposite to the lower outer pipe of the impeller; a plurality of inner oil inlets are arranged on a thick pipe wall on the specially shaped pipe; and plugging blocks are arranged at lower end ports of the cylinder pipes. According to the protecting device under the oil-extracting pump, the multi-level sand-preventing mechanisms, such as the sand-preventing pipe and the spiral pipe, are mounted under the oil-extracting pump and are used for separating oil from sand, so that the sand content of the extracted crude oil is greatly reduced, the pump-plugging accident is effectively prevented, the service life of the pump is prolonged and the oil extraction production efficiency is increased.

Description

Protective gear under the oil well pump

Technical field

The utility model relates to the protective gear under a kind of oil well pump, is mounted in specifically the oil well pump bottom of oil well, for the protection of the additional device of oil well pump.

Background technique

During oilfield exploitation, enter especially middle and advanced stage, or in the marginal well in oil field, the situation of shaking out is even more serious, is directed in use frequent holddown of oil well pump, cause damage of equipment need to or be changed through the often shut-down well maintenance, and impact is produced.The protective gear of various oil well pumps all exists easy holddown phenomenon in actual use, and the protection effect is undesirable, is necessary to improve.

The model utility content

The technical problems to be solved in the utility model provides a kind of holddown accident that more effectively prevents and occurs, and prolongs the oil well pump life-span, protective gear under the oil well pump of enhancing productivity.

Protective gear under the utility model oil well pump comprises the upper connection that is fixedly connected with the oil well pump lower end, and the inside and outside footpath of upper connection bottom is fixedly connected with sand control cylinder, upper exterior tube one end respectively; Between upper exterior tube and sand control cylinder, be provided with at least evenly distributedly 6 blast tubes, the blast tube upper end closed, its lower end bending is communicated with center tube; Side over against the sand control cylinder on blast tube is provided with several spray orifices; The center tube lower end is communicated with the transition joint center, and transition joint top external diameter is fixedly connected with the upper exterior tube lower end; On the upper exterior tube that is positioned at above the transition joint, be provided with evenly distributedly several clearance holes; Transition joint below external diameter is fixedly connected with the lower contact external diameter by lower outer pipe; The volute that is communicated with center tube is housed in lower outer pipe, volute comprises cylindrical tube and the middle special pipe at two ends: special pipe tube wall internal diameter is cylindric, but pipe thickness is inconsistent, it is that circular or oval body is connected as a single entity and consists of greater than two-part of tube wall internal diameter by the diameter of settling along counterclockwise rotation on the diameter direction, and forms the groove along counterclockwise rotation in the joint; The cylindrical tube at two ends is rotationally connected by upper and lower bearing and transition joint and lower contact respectively, also is installed with impeller on the cylindrical tube of upper end; Have oil inlet hole outside several at the lower outer pipe over against impeller, the thick tube wall place on special pipe has oil inlet hole in several; The cylindrical tube lower end mouth is provided with plugging block, is provided with several sand setting holes of sediment outflow downwards in lower contact.

Protective gear under the utility model oil well pump wherein radially is provided with the sand retaining ring that is fixedly connected with its external diameter in the intermediate portion of center tube, and the external diameter of sand retaining ring is fixedly connected with the upper exterior tube inwall, is provided with several through holes at sand retaining ring.

Protective gear under the utility model oil well pump; wherein below the sand retaining ring of through hole, be provided with unidirectional baffle plate; unidirectional baffle plate is hinge below sand retaining ring on one side, and following and draught spring one end of its another side is flexibly connected, the oblique lower and center tube flexible connection of the draught spring the other end.

Protective gear under the utility model oil well pump, wherein the diameter of spray orifice and interior oil inlet hole is 2mm～3mm.

Protective gear under the utility model oil well pump, wherein the sand setting hole is 8, evenly distributes all around.

Protective gear carries out oil-sand separation by the multistage sand control such as sand-proof pipe and volute mechanism is installed under the utility model oil well pump under oil well pump; sand content in the crude oil that pumping gets on is reduced greatly; certainly prevent also that the foreign material that fall from ground and the crystalline solid the crude oil etc. from entering in the pump; prevent that more effectively the holddown accident from occuring; reduce and stop the well servicing time; prolong the oil well pump life-span, improve the manufacturing efficiency of recovering the oil.

Description of drawings

Fig. 1 is protective gear structural profile schematic diagram (special pipe does not cut open among the figure) under the utility model oil well pump;

Fig. 2 is the A-A generalized section of Fig. 1;

Fig. 3 is the B-B generalized section of Fig. 1.

Embodiment

By Fig. 1, Fig. 2 as seen, protective gear comprises the upper connection 1 that is fixedly connected with the oil well pump lower end under the utility model oil well pump, and the inside and outside footpath of upper connection 1 bottom is fixedly connected with sand control cylinder 2, upper exterior tube 3 one ends respectively; Between upper exterior tube 3 and sand control cylinder 2, be provided with at least evenly distributedly 6 blast tubes 4, blast tube 4 upper end closeds, its lower end bending is communicated with center tube 5; Side over against sand control cylinder 2 on blast tube 4 is provided with the spray orifice 6 that several diameters are 3mm, and center tube 5 lower ends are communicated with transition joint 12 centers, and transition joint 12 top external diameters are fixedly connected with upper exterior tube 3 lower ends; On the upper exterior tube 3 that is positioned at above the transition joint 12, be provided with evenly distributedly several clearance holes 11; Transition joint 12 below external diameters are fixedly connected with lower contact 23 external diameters by lower outer pipe 17; The volute that is communicated with center tube 5 is housed in lower outer pipe 17, and volute comprises cylindrical tube 14 and the middle special pipe 18 at two ends; Special pipe 18 tube wall internal diameters are cylindric, but pipe thickness is inconsistent, it is to be connected as a single entity greater than the oval body of two-part of tube wall internal diameter by the diameter of settling along counterclockwise rotation on the diameter direction to consist of, these two-part also can be circular bodys, maybe can make hollow tube wall, to alleviate whole volute weight, it is rotated flexibly; And also form the groove 19 along counterclockwise rotation in the joint, be convenient to sediment outflow, see Fig. 3; The cylindrical tube 14 at two ends respectively by upper and lower bearing 13,22 and transition joint 12 and lower contact 23 be rotationally connected, on the cylindrical tube 14 of upper end, also be installed with impeller 16; Have oil inlet hole 15 outside several at the lower outer pipe 17 over against impeller 16, the thick tube wall place on special pipe 18 has oil inlet hole 20 in several; Cylindrical tube 14 lower end mouth are provided with plugging block 24, are provided with several sand setting holes 21 of sediment outflow downwards in lower contact 23.During use, lower contact 23 fixedly is communicated with sand sediment pipe, makes the sandstone in the lower outer pipe 18 be deposited to the oil well bottom.

Wherein, radially be provided with the sand retaining ring 8 that is fixedly connected with its external diameter in the intermediate portion of center tube 5, the external diameter of sand retaining ring 8 is fixedly connected with upper exterior tube 3 inwalls, be provided with several through holes 7 at sand retaining ring 8, below the sand retaining ring 8 of through hole 7, be provided with unidirectional baffle plate 9, unidirectional baffle plate 9 is hinge below sand retaining ring 8 on one side, and following and draught spring 10 1 ends of its another side are flexibly connected, oblique lower and center tube 5 flexible connections of draught spring 10 the other ends.

During the utility model work, be connected by installing under upper connection 1 and the oil well pump, its outer oil inlet hole 15 is aimed at oil reservoir as far as possible, crude oil through the pump pumping enters in the lower outer pipe 17 from this hole, crude oil impacts impeller 16 and drives the volute rotation, sand grains greater than 3mm separates through rotating, simultaneously under the own wt effect, sink down into the shaft bottom through sand setting hole 21 and sand sediment pipe, enter from interior oil inlet hole 20 through the pump pumping and upwards take away in the volute and contain crude oil less than the 3mm sand grains, spray from the spray orifice 6 of blast tube 4 through center tube 5, because the diameter of spray orifice 6 is 2～3mm, and the slit of sand control cylinder 2 wide be 0.2～0.5mm, so the sand grains deadweight sinking via through holes 7 that stops screening through sand control cylinder 2 is from clearance hole 11 rows.Being deposited on sandstone in the volute can open plugging block 24 it is drained into the shaft bottom.Sand control cylinder 2 is existing product, is commonly called as screen casing.

Crude oil upwards promotes through sand control cylinder 2, thereby the crude oil sand content that enters oil well pump greatly reduces, and the holddown phenomenon achieves a solution.

Claims

1. protective gear under the oil well pump is characterized in that comprising the upper connection (1) that is fixedly connected with the oil well pump lower end, and the inside and outside footpath of described upper connection (1) bottom is fixedly connected with sand control cylinder (2), upper exterior tube (3) one ends respectively; Between described upper exterior tube (3) and sand control cylinder (2), be provided with at least evenly distributedly 6 blast tubes (4), described blast tube (4) upper end closed, its lower end bending is communicated with center tube (5); Be provided with several spray orifices (6) in the upper side over against described sand control cylinder (2) of described blast tube (4); Described center tube (5) lower end is communicated with transition joint (12) center, and described transition joint (12) top external diameter is fixedly connected with described upper exterior tube (3) lower end; On the described upper exterior tube (3) that is positioned at described transition joint (12) top, be provided with evenly distributedly several clearance holes (11); Described transition joint (12) below external diameter is fixedly connected with lower contact (23) external diameter by lower outer pipe (17); The volute that is communicated with described center tube (5) is housed in described lower outer pipe (17), and described volute comprises cylindrical tube (14) and the middle special pipe (18) at two ends; Described special pipe (18) tube wall internal diameter is cylindric, but pipe thickness is inconsistent, it is that circular or oval body is connected as a single entity and consists of greater than two-part of tube wall internal diameter by the diameter of settling along counterclockwise rotation on the diameter direction, and forms the groove (19) along counterclockwise rotation in the joint; The described cylindrical tube (14) at two ends is rotationally connected by upper and lower bearing (13,22) and described transition joint (12) and lower contact (23) respectively, also is installed with impeller (16) on the described cylindrical tube (14) of upper end; Have oil inlet hole outside several (15) at the lower outer pipe (17) over against described impeller (16), the thick tube wall place on described special pipe (18) has oil inlet hole in several (20); Described cylindrical tube (14) lower end mouth is provided with plugging block (24), is provided with several sand setting holes (21) of sediment outflow downwards in described lower contact (23).

2. protective gear under the oil well pump according to claim 1; it is characterized in that radially being provided with in the intermediate portion of described center tube (5) sand retaining ring (8) that is fixedly connected with its external diameter; the external diameter of described sand retaining ring (8) is fixedly connected with described upper exterior tube (3) inwall, is provided with several through holes (7) at described sand retaining ring (8).

3. protective gear under the oil well pump according to claim 1 and 2; it is characterized in that being provided with unidirectional baffle plate (9) in the below over against the described sand retaining ring (8) of described through hole (7); described unidirectional baffle plate (9) is hinge below described sand retaining ring (8) on one side; following and draught spring (10) one ends of its another side are flexibly connected, oblique lower and described center tube (5) flexible connection of described draught spring (10) the other end.

4. protective gear under the oil well pump according to claim 3 is characterized in that the diameter of described spray orifice (6) and interior oil inlet hole (20) is 2mm～3mm.

5. protective gear under the oil well pump according to claim 4 is characterized in that described sand setting hole (21) is 8, evenly distributes all around.