CN202596630U

CN202596630U - Sand-settling assembly for screw drilling tool

Info

Publication number: CN202596630U
Application number: CN 201220101483
Authority: CN
Inventors: 王玉刚; 刘海明
Original assignee: YANCHENG DONGRONG PETROLEUM MACHINERY PLANT
Current assignee: YANCHENG DONGRONG PETROLEUM MACHINERY PLANT
Priority date: 2012-03-19
Filing date: 2012-03-19
Publication date: 2012-12-12
Anticipated expiration: 2022-03-19

Abstract

The utility model discloses a sand-settling assembly for a screw drilling tool. The sand-settling assembly can prevent falling deposit from blocking a motor of the screw drilling tool effectively, and comprises a sand-settling outer pipe, an upper joint arranged at the upper end of the sand-settling outer pipe, a lower joint arranged at the lower end of the sand-settling outer pipe and a sand-settling inner pipe arranged inside the sand-settling outer pipe, wherein the lower end of the sand-settling inner pipe is connected with the lower joint, and a single-flow valve is sleeved at the upper end of the sand-settling inner pipe; a plurality of elliptical holes are formed in the single-flow valve; a plurality of inner elliptical holes which are matched with the elliptical holes are formed in the sand-settling inner pipe; a spring base is arranged on the sand-settling inner pipe at the lower end of the single-flow valve; and a spring is sleeved on the sand-settling inner pipe between the single-flow valve and the spring base. When being installed on the screw drilling tool for use, the sand-settling assembly is capable of preventing the falling deposit from blocking the motor effectively and thus prolonging the service life of the screw drilling tool, and guarantees stable work, improves working efficiency and reduces working cost.

Description

Helicoid hydraulic motor sand setting assembly

Technical field

The utility model relates to a kind of oilfield downhole operation that is applied to and bores the helicoid hydraulic motor sand setting assembly that prevents the foul obstruction in the milling operation construction.

Background technology

In the process of oil well operation, need bore the mill mine water bod, crystallizable mineral and carry out sleeve pipe with helicoid hydraulic motor often except that constructions such as trowel used for plasterings, owing to the restriction of field condition and surrounding environment, often can not guarantee down the cleaning of well casing bar.Simultaneously, owing to control cost, aging aborning pipe bar repeatedly reuses; Deposition junks such as the cement after the interior brill of iron rust, dirty skin, dead oil and the well on above ground portion earth, sand grains, the pipe bar wall is broken, reservoir sand are fallen the screw drilling tool motor place through bypass valve and the inner sedimentation of drilling rod after termination of pumping; These sediment piles form in motor top to stop up and make workover fluid can not get into motor, and motor can not be worked, and cause the construction failure; Thereby need proposition down-hole helicoid hydraulic motor to change; And block the back motor and repair difficulty on ground, even can not repair, increased the oilfield downhole operation workover cost greatly.

Summary of the invention

The utility model technical problem to be solved is: a kind of helicoid hydraulic motor sand setting assembly that junk stops up motor that can effectively prevent to precipitate is provided.

In order to solve the problems of the technologies described above, the technical scheme that the utility model adopts is: helicoid hydraulic motor sand setting assembly comprises: the sand setting outer tube; Be arranged on the top connection of sand setting outer tube upper end; Be arranged on the lower contact of sand setting outer tube lower end and be arranged on pipe in the inner sand setting of sand setting outer tube, the lower end of pipe is connected with lower contact in the sand setting, and the upper end of in sand setting, managing is arranged with ball-and-seat; On ball-and-seat, offer some elliptical apertures; Pipe is provided with some interior elliptical apertures that match with elliptical aperture in sand setting, and pipe is provided with spring base in the sand setting of ball-and-seat lower end, is arranged with spring on the pipe in the sand setting between ball-and-seat and spring base.

In order to solve the problems of the technologies described above better, the further technical scheme that the utility model adopts is: on described ball-and-seat, offer 2 elliptical apertures.

The utility model has the advantages that: above-mentioned helicoid hydraulic motor sand setting assembly is contained in when using on the helicoid hydraulic motor, can effectively prevents to precipitate junk and stop up motor, prolonged the application life of helicoid hydraulic motor, operation is steady, has improved operating efficiency, has reduced operating cost.

Description of drawings

Fig. 1 is the sectional structure sketch map of the utility model helicoid hydraulic motor sand setting assembly.

Among the figure: 1, sand setting outer tube, 2, top connection, 3, lower contact, 4, pipe in the sand setting, 5, ball-and-seat, 6, elliptical aperture, 7, interior elliptical aperture, 8, spring base, 9, spring, 10, toroidal cavity.

The specific embodiment

Describe the particular content of the utility model in detail below in conjunction with accompanying drawing and specific embodiment.

As shown in Figure 1, helicoid hydraulic motor sand setting assembly comprises: sand setting outer tube 1; Be arranged on the top connection 2 of sand setting outer tube 1 upper end; Pipe 4 in the lower contact 3 that the is arranged on sand setting outer tube 1 lower end sand setting inner with being arranged on sand setting outer tube 1, the lower end of pipe 4 is connected with lower contact 3 in the sand setting, in sand setting, manages 4 upper end and is arranged with ball-and-seat 5; On ball-and-seat 5, offer some elliptical apertures 6; In the present embodiment, on described ball-and-seat 5, be provided with 2 elliptical apertures 6 altogether, the number of elliptical aperture 6 can be provided with arbitrarily as required in actual application.Pipe 4 is provided with some interior elliptical apertures 7 that match with elliptical aperture 6 in sand setting, and pipe 4 is provided with spring base 8 in the sand setting of ball-and-seat 5 lower ends, is arranged with spring 9 on the pipe 4 in the sand setting between ball-and-seat 5 and spring base 8.

During use, through lower contact 3 above-mentioned helicoid hydraulic motor sand setting assembly is connected with the by-pass valve of screwdrill of upper end and the motor on helicoid hydraulic motor top, lower end, behind the turn on pump of ground; Liquid is pushed the resistance compression spring 9 that ball-and-seat 5 overcomes spring 9 open; Make in 2 elliptical apertures 6 and the sand setting on the ball-and-seat 5 that 2 interior elliptical apertures overlap on the pipe 4, form passage, manage 4 in the elliptical aperture passage entering sand setting of liquid through 4 coincidences after and carry out downwards again; Enter into the motor assembly of helicoid hydraulic motor, make motor assembly work.

When the workover fluid that contains foul was flowed through above-mentioned helicoid hydraulic motor sand setting assembly, foul can be deposited in the sand setting in the toroidal cavity 10 between the pipe 4 and sand setting outer tube 1, guarantees that assembly is not blocked, efficiently solves the problem of deposition junk obstruction motor.After the termination of pumping; Spring 9 promotes ball-and-seats 5 and makes in 4 elliptical apertures 6 and the sand setting on the ball-and-seat 5 that 4 interior elliptical apertures separate on the pipe 4, makes the passage disconnection to force liquid not flow; Liquid is in bypass valve gets into helicoid hydraulic motor in the sleeve pipe that can prevent to cause owing to the borehole pressure imbalance; And through of the collection of sand setting assembly, guaranteed the unimpeded of workover fluid, caused an inoperable difficult problem thereby efficiently solve to form to stop up behind the foul entering screw drilling tool motor in the sleeve pipe to foul.

Claims

1. helicoid hydraulic motor sand setting assembly; It is characterized in that: comprising: sand setting outer tube (1); Be arranged on the top connection (2) of sand setting outer tube (1) upper end; Be arranged on the lower contact (3) of sand setting outer tube (1) lower end and be arranged on pipe (4) in the inner sand setting of sand setting outer tube (1), the lower end of pipe (4) is connected with lower contact (3) in the sand setting, and the upper end of pipe (4) is arranged with ball-and-seat (5) in sand setting; On ball-and-seat (5), offer some elliptical apertures (6); Pipe (4) is provided with some interior elliptical apertures (7) that match with elliptical aperture (6) in sand setting, and pipe (4) is provided with spring base (8) in the sand setting of ball-and-seat (5) lower end, is arranged with spring (9) on the pipe (4) in the sand setting between ball-and-seat (5) and spring base (8).

2. according to the described helicoid hydraulic motor sand setting of claim 1 assembly, it is characterized in that: on described ball-and-seat (5), offer two elliptical apertures (6).