CN201991749U

CN201991749U - Spiral fork type screw motor underground supercharger

Info

Publication number: CN201991749U
Application number: CN2010205762441U
Authority: CN
Inventors: 赵军友; 徐依吉; 赵峰; 张振国
Original assignee: China University of Petroleum East China
Current assignee: China University of Petroleum East China
Priority date: 2010-10-18
Filing date: 2010-10-18
Publication date: 2011-09-28
Anticipated expiration: 2020-10-18

Abstract

The utility model provides a spiral fork type screw motor underground supercharger, applied to the field of oil field deep well drilling. The structure is that a screw motor, a drive fork, a driven fork, a compression spring, a cross connecting head, a filter cylinder, a plunger and a plunger cylinder are orderly installed in a sealed outer cylinder from top down. The screw motor drive the drive fork to rotate, the drive fork drives the driven fork, the driven fork is processed with screw threads, and when the screw threads rotate the driven fork moves ahead; when moving downwards for a certain distance, the driven fork is separated from the drive fork, and the spring pushes the driven fork, the plunger and other components to return upwards; therefore, the rotating motion is changed to be reciprocating motion. Because of the up and down reciprocating motion of the plunger, part of slurry in the plunger cylinder is pressurized to an ultrahigh pressure. The drilling speed can be greatly improved due to the ultrahigh pressure slurry provided by the utility model; the designed fork screw mechanism has the advantages of simple structure and high efficiency; a tapered liquid inlet valve is designed in the inner hole on the lower end of the plunger so that the pump volume is reduced.

Description

Spiral fork type screw motor underground booster

Technical field

The utility model relates to a kind of hydraulic booster device, is used for the oil field deep well drilling process, improves bit speed.

Background technique

In present oil drilling industry, will more and more face deep-well, ultradeep well creeps into a difficult problem, lithology becomes increasingly complex, and drilling speed descends thereupon, and cost constantly raises up.And the broken rock of high pressure water jet combine is being an extremely promising technology aspect the raising drilling speed.

In order to improve bit speed, a lot of people all in research how with the drilling fluid supercharging, wherein downhole pressure increasing is at present popular topic.Downhole pressure increasing is exactly the normal pressure with ground, by the nearly drill bit pressurized machine in down-hole the part drilling fluid is increased to ultrahigh pressure.So far successively occurred polytype pressurized machines such as static pressure type pressurized machine, jet-type pressurized machine both at home and abroad the nineties.They all have complicated selector valve system of a cover and more runner, have reduced reliability, have increased difficulty of processing simultaneously.

Summary of the invention

In order to overcome deficiency, the especially deficiency aspect working life and reliability that above-mentioned pressurized machine exists, the utility model provides a kind of spiral fork type screw motor underground booster.

The technical solution of the utility model is: order is installed screw motor, active shift fork, driven shift fork, pressure spring, cross connecting head, cartridge filter, plunger, plunger case, feed liquor valve and liquid discharging valve from top to bottom in an airtight urceolus, plunger is in plunger case, and the upper end is by the sealing of standard v-seal assembly.Screw motor drives initiatively, and shift fork rotates, initiatively shift fork promotes driven shift fork, and be processed with screw thread on the driven shift fork, screw thread rotation will move ahead, behind the descending certain stroke of driven shift fork, break away from the active shift fork, this moment, spring promoted that driven shift fork is up to be returned, and changed into to-and-fro motion thereby realized rotatablely moving.Plunger pumps, and in plunger case part mud is pressurized to ultrahigh pressure, significantly improves bit speed.

The utility model adopts the screw motor source that is used as power, and moment of torsion is big, and radially volume is little.Designed driving and driven shift fork changement, simple in structure, processing, and efficient height easily.The liquid inlet filtrating equipment of being installed prevents that larger particles from entering the pump housing, can reduce the moving element wearing and tearing, avoids spray nozzle clogging.The design of feed liquor valve reduces pump housing volume in plunger inside.

Description of drawings

Accompanying drawing is a structural representation of the present utility model.

Embodiment

Describe structure of the present utility model and mode of execution in detail below in conjunction with accompanying drawing.

In the upper cylinder 15 of a sealing, top is equipped with screw motor 1, and motor and active shift fork 2 are by screwed connection, and rotation together; Initiatively shift fork promotes driven shift fork 3 and rotates, and is processed with screw thread on the top major part cylindrical body of driven shift fork, and threads turn will down be moved, pressure spring 4, and promote cartridge filter 7, plunger 8 is descending together, thereby part mud is pressurized to ultrahigh pressure; Behind the descending stroke of driven shift fork, break away from the active shift fork, under the promotion of spring 4, move on the parts such as driven shift fork and plunger, form vacuum in the plunger case, feed liquor valve 11 is opened, and in part mud suction cylinder, finishes a circulation.

The upper end of active shift fork 2 is made cylindrical, and its endoporus is processed with screw thread, and with being threaded on the revolution body, vertical plane is made in the front of shift fork 2, promotes the vertical plane of driven shift fork, and the slope is made in the back, increases its intensity; The shift fork shape is made in the upper end of driven shift fork 3, combines with the active shift fork, and the centre is hollow great circle column, and the outer surface of cylinder is processed with screw thread, screws with the internal thread of cylindrical shell 15, therefore can move up and down.Be processed with key on the big disk of cross connecting head 6, cooperate, stop crosshead and rotate with lower member with keyway on the cylindrical shell; Be processed with screw thread on the cylinder of two terminal circle up and down of cross connecting head, the upper end screw thread is connected with driven shift fork by attaching nut 5, and the lower end screw thread is connected with cartridge filter 7.Cartridge filter is hollow cylindric, is processed with a plurality of feed liquor cylinder apertures on the cylindrical shell, and barrel outer surface is equipped with filter screen, does not have large particle in the liquid that guarantees to suck, and plays the effect of the protection pump housing; This filtrating equipment is because design in the passage of main liquid stream, is subjected to the flushing of liquid stream, so have the self-cleaning function.Plunger 8 is a hollow cylindrical, and the upper end is processed with screw thread, is connected with internal thread on the cartridge filter 7, and there are packing ring of loosening 14 and locking nut 13 in the joint; Plunger is installed in the cylinder body 10, and V-seal ring member 9 sealings of standard are adopted on top; The plunger lower end has macropore, the inner taper feed liquor valve 11 of installing, and when plunger was up, the feed liquor valve was opened, and liquid discharging valve 12 is opened when descending.

Claims

1. spiral fork type screw motor underground booster that is used for the supercharging of oil drilling mud, it is characterized in that: in an airtight urceolus (15), order is installed with screw motor (1) from top to bottom, active shift fork (2), driven shift fork (3), pressure spring (4), cross connecting head (6), cartridge filter (7), plunger (8), plunger case (10), feed liquor valve (11) and liquid discharging valve (12); Plunger is in plunger case, and the upper end is by the sealing of standard v-seal assembly.

2. underground booster according to claim 1, it is characterized in that: initiatively the upper end of shift fork (2) is made cylindrical, its endoporus is processed with screw thread, with being threaded on the revolution body (1), vertical plane is made in the front of shift fork (2), promote the vertical plane of driven shift fork, the slope is made in the back; The shift fork shape is made in the upper end of driven shift fork (3), combines with the active shift fork, and the centre is hollow great circle column, and the outer surface of cylinder is processed with screw thread, screws with the internal thread of cylindrical shell (15).

3. underground booster according to claim 1 is characterized in that: be processed with key on the big disk of cross connecting head (6), cooperate with keyway on the cylindrical shell (15); Be processed with screw thread on the cylinder of two terminal circle up and down of cross connecting head, the upper end screw thread is connected with driven shift fork (3) by attaching nut (5), and the lower end screw thread is connected with cartridge filter (7).

4. underground booster according to claim 1 is characterized in that: cartridge filter (7) is processed with a plurality of feed liquor cylinder apertures for hollow cylindric on the cylindrical shell, barrel outer surface is equipped with filter screen.

5. underground booster according to claim 1 is characterized in that: plunger (8) is a hollow cylindrical, and the upper end is processed with screw thread, is connected with internal thread on the cartridge filter (7), and there are packing ring of loosening (14) and locking nut (13) in the joint; The plunger lower end has macropore, the inner taper feed liquor valve (11) of installing.