阅读说明：本技术 一种新型双螺杆井下输送泵 (Novel double-screw underground delivery pump ) 是由 潘爱军 于 2018-09-03 设计创作，主要内容包括：本发明属于输送电泵领域并公开了一种新型双螺杆井下输送泵；包括泵体,所述泵体内设有主动螺杆和从动螺杆,且所述的主动螺杆和从动螺杆互相啮合,所述泵体的一端固定连接有轴承座,且所述主动螺杆和从动螺杆插设在轴承座内的部分依次套设有轴环和轴套；所述轴承座远离泵体的一端固接有后盖；所述泵体远离轴承座的一端设有前盖,所述主动螺杆和从动螺杆的另一端设置在前盖内,且所述主动螺杆和从动螺杆位于前盖内的部分依次套设有第一旋转齿轮和第二旋转旋齿轮；本发明结构科学合理,使用安全方便,可串联使用,进一步提高了产品的应用范围,有效提高了输送扬程。(The invention belongs to the field of electric conveying pumps and discloses a novel double-screw underground conveying pump; the pump comprises a pump body, wherein a driving screw and a driven screw are arranged in the pump body, the driving screw and the driven screw are meshed with each other, one end of the pump body is fixedly connected with a bearing seat, and a shaft collar and a shaft sleeve are sequentially sleeved on the parts of the driving screw and the driven screw, which are inserted in the bearing seat; a rear cover is fixedly connected to one end of the bearing block, which is far away from the pump body; a front cover is arranged at one end of the pump body, which is far away from the bearing seat, the other ends of the driving screw and the driven screw are arranged in the front cover, and a first rotary gear and a second rotary gear are sequentially sleeved on the parts, which are positioned in the front cover, of the driving screw and the driven screw; the invention has scientific and reasonable structure, safe and convenient use and can be used in series, thereby further improving the application range of products and effectively improving the conveying lift.)

1. A novel double-screw underground conveying pump comprises a pump body (1) and is characterized in that a driving screw (2) and a driven screw (3) which are arranged in parallel are arranged in the pump body (1), the driving screw (2) and the driven screw (3) are meshed with each other, a bearing seat (4) is fixedly connected to one end of the pump body (1), one ends of the driving screw (2) and the driven screw (3) are inserted into the bearing seat (4), a shaft collar (16) and a shaft sleeve (15) are sequentially sleeved on the parts, inserted into the bearing seat (4), of the driving screw (2) and the driven screw (3), and a first oil seal (17) is arranged between the shaft collar (16) and the shaft sleeve (15); a rear cover (5) is fixedly connected to one end, far away from the pump body (1), of the bearing seat (4), the driving screw (2) penetrates through the rear cover (5), a second oil seal (6) is arranged at the position where the driving screw (2) is in contact with the rear cover (5), and an oil inlet is formed in the rear cover (5); a front cover (8) is arranged at one end, far away from the bearing seat (4), of the pump body (1), the other ends of the driving screw (2) and the driven screw (3) are arranged in the front cover (8), and a first rotary gear (9) and a second rotary gear (10) are sequentially sleeved on the parts, located in the front cover (8), of the driving screw (2) and the driven screw (3); the middle parts of the driving screw rod (2) and the driven screw rod (3) are respectively provided with a middle supporting piece (11) for supporting the driving screw rod (2) and the driven screw rod (3) to rotate, and an oil outlet is formed in the front cover (8).

2. The novel twin-screw downhole delivery pump according to claim 1, characterized in that the driving screw (2) passes through the rear cover (5) and extends to the outside of the rear cover (5), and the driving screw (2) is provided with a key (7) at the position outside the rear cover (5).

3. The novel twin-screw downhole delivery pump according to claim 1, characterized in that a first gasket (19) is arranged between the pump body (1) and the bearing seat (4), and the pump body (1) and the bearing seat (4) are connected by a plurality of first screws (12) which are uniformly arranged.

4. The novel twin-screw downhole delivery pump of claim 1, characterized in that a second gasket (18) is arranged between the bearing seat (4) and the rear cover (5), and the bearing seat (4) and the rear cover (5) are connected by a plurality of second screws (13) which are uniformly arranged.

5. A novel twin-screw downhole delivery pump according to claim 1, characterised in that the pump body (1) is connected to the front cover (8) by a number of evenly arranged third screws (14).

6. The new twin-screw downhole delivery pump according to claim 1, characterised in that the driving screw (2) and the driven screw (3) are threaded with a nut (20) by one end of the second rotary helical gear (10).

Technical Field

The invention relates to the technical field of electric conveying pumps, in particular to a novel double-screw underground conveying pump.

Background

In the oil extraction industry, a great number of downhole delivery pumps are currently used, which mainly comprise: a kowtow well type plunger pump, a single-screw pump and a multi-stage centrifugal pump. Under the general condition, the efficiency of the kowtow well type plunger pump is not high due to the reason of idle stroke, and in addition, a part of power is consumed to overcome the resistance of a conveying pipeline, so the operation cost is higher; the stator of the single-screw pump is made of rubber plastic, is easy to damage in the process of mutually meshing and conveying with a metal rotor, the service life is difficult to guarantee, and particularly, the expansion and dead abrasion of the stator can be aggravated in the state of pumping out crude oil in a well; the multistage centrifugal pump is widely applied to the oil extraction in the underground of an oil field at present, is generally driven by an underground submersible motor, has good effect, but has certain limitation on the transportation of materials with high crude oil viscosity, particularly, the mud and sand crude oil easily causes the damage of an impeller, the motor is easily burnt out after the crude oil is emptied, and the like. In conclusion, the application of various oil extraction pumps in the underground oil extraction process of the current oil industry has certain limitations, and the oil extraction operation effect is not ideal. The method aims at the particularity of the oil field downhole operation, and comprises the following steps: the problems of the kowtow well type plunger pump, the single-screw pump and the multi-stage centrifugal pump are how to develop a kind of pump: the technical problems to be solved by the technical personnel in the field when the kowtow well type plunger pump, the single-screw pump and the multistage centrifugal pump are used for overcoming the defects.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides a novel double-screw underground delivery pump.

In order to solve the technical problems, the invention adopts the following technical scheme:

the novel double-screw underground conveying pump comprises a pump body, wherein a driving screw and a driven screw are arranged in the pump body in parallel and are meshed with each other, a bearing seat is fixedly connected to one end of the pump body, one ends of the driving screw and the driven screw are inserted into the bearing seat, a shaft collar and a shaft sleeve are sequentially sleeved on the parts of the driving screw and the driven screw inserted into the bearing seat, and a first oil seal is arranged between the shaft collar and the shaft sleeve; a rear cover is fixedly connected to one end, far away from the pump body, of the bearing seat, the driving screw penetrates through the rear cover, a second oil seal is arranged at the contact part of the driving screw and the rear cover, and an oil inlet is formed in the rear cover; a front cover is arranged at one end of the pump body, which is far away from the bearing seat, the other ends of the driving screw and the driven screw are arranged in the front cover, and a first rotary gear and a second rotary gear are sequentially sleeved on the parts, which are positioned in the front cover, of the driving screw and the driven screw; the middle parts of the driving screw and the driven screw are respectively provided with a middle supporting piece for supporting the driving screw and the driven screw to rotate, and the front cover is provided with an oil outlet.

Preferably, the driving screw penetrates through the rear cover and extends to the outer side of the rear cover, and a key is arranged at the position, located on the outer side of the rear cover, of the driving screw.

Preferably, a first gasket is arranged between the pump body and the bearing seat, and the pump body is connected with the bearing seat through a plurality of first screws which are uniformly arranged.

Preferably, a second gasket is arranged between the bearing seat and the rear cover, and the bearing seat and the rear cover are connected through a plurality of second screws which are uniformly arranged.

Preferably, the pump body is connected with the front cover through a plurality of third screws which are uniformly arranged.

Preferably, nuts are screwed to one ends of the driving screw and the driven screw close to the second rotary gear.

The novel double-screw underground delivery pump provided by the invention has the beneficial effects that:

(1) the double-screw underground delivery pump extends the axial force from the middle high-pressure area to the low-pressure areas at the two ends within the designed pressure range, is basically balanced and cannot generate axial runout;

(2) according to the double-screw underground conveying pump, aiming at the axial system radial force and the twisting force of a strong and continuous screw high-pressure area, the middle supporting piece is arranged between the driving screw and the driven screw so as to improve the connection firmness, one ends of the driving screw and the driven screw are fixed in the bearing block through the shaft sleeve and the shaft collar, the other ends of the driving screw and the driven screw are fixed in the front cover through the first rotating gear and the second rotating gear, and the effects of balancing partial radial force and partial screw axial system twisting force of the high-pressure area of the conveying pump are achieved, so that the double-screw underground conveying pump can operate in a high-pressure environment, and the service life of a product;

(3) the invention has scientific and reasonable structure, safe and convenient use and can be used in series, thereby further improving the application range of products and effectively improving the conveying lift.

Drawings

The invention will be further described in detail with reference to examples of embodiments shown in the drawings to which, however, the invention is not restricted.

FIG. 1 is a schematic diagram of a front view of the system of the present invention;

FIG. 2 is a left side view of the system of the present invention.

In the figure: the pump body 1, the driving screw rod 2, the driven screw rod 3, the bearing seat 4, the rear cover 5, the second oil seal 6, the key 7, the front cover 8, the first rotating gear 9, the second rotating gear 10, the intermediate support 11, the first screw 12, the second screw 13, the third screw 14, the shaft sleeve 15, the shaft collar 16, the first oil seal 17, the second gasket 18, the first gasket 19 and the nut 20.

Detailed Description

The technical solutions in the embodiments of the present invention are clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.

Referring to the attached drawings 1-2, the novel double-screw underground conveying pump comprises a pump body 1, wherein a driving screw 2 and a driven screw 3 which are arranged in parallel are arranged in the pump body 1, the driving screw 2 and the driven screw 3 are mutually meshed, one end of the pump body 1 is fixedly connected with a bearing seat 4, one ends of the driving screw 2 and the driven screw 3 are inserted into the bearing seat 4, a shaft collar 16 and a shaft sleeve 15 are sequentially sleeved on the parts of the driving screw 2 and the driven screw 3 inserted into the bearing seat 4, and a first oil seal 17 is arranged between the shaft collar 16 and the shaft sleeve 15; a rear cover 5 is fixedly connected to one end, far away from the pump body 1, of the bearing seat 4, the driving screw 2 penetrates through the rear cover 5, a second oil seal 6 is arranged at the contact part of the driving screw 2 and the rear cover 5, and an oil inlet is formed in the rear cover 5; a front cover 8 is arranged at one end of the pump body 1, which is far away from the bearing seat 4, the other ends of the driving screw rod 2 and the driven screw rod 3 are arranged in the front cover 8, and a first rotary gear 9 and a second rotary gear 10 are sequentially sleeved on the parts, which are positioned in the front cover 8, of the driving screw rod 2 and the driven screw rod 3; the middle parts of the driving screw rod 2 and the driven screw rod 3 are respectively provided with a middle supporting piece 11 for supporting the driving screw rod 2 and the driven screw rod 3 to rotate, and an oil outlet is formed in the front cover 8.

The driving screw 2 penetrates through the rear cover 5 and extends to the outer side of the rear cover 5, and a key 7 is arranged at the position, located on the outer side of the rear cover 5, of the driving screw 2; a first gasket 19 is arranged between the pump body 1 and the bearing seat 4, and the pump body 1 is connected with the bearing seat 4 through four first screws 12 which are uniformly arranged; a second gasket 18 is arranged between the bearing seat 4 and the rear cover 5, and the bearing seat 4 is connected with the rear cover 5 through four second screws 13 which are uniformly arranged; the pump body 1 is connected with the front cover 8 through four third screws 14 which are uniformly arranged; and nuts 20 are screwed at one ends of the driving screw rod 2 and the driven screw rod 3 close to the second rotary gear 10.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.