CN201486495U

CN201486495U - Screw pump anchor

Info

Publication number: CN201486495U
Application number: CN200920191048XU
Authority: CN
Inventors: 徐伟国; 张春雷
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-08-04
Filing date: 2009-08-04
Publication date: 2010-05-26
Anticipated expiration: 2019-08-04

Abstract

A screw pump anchor comprises a clamp sleeve, slip teeth, a center tube, a centering block and an anti-rotating device. The center tube is connected with a conical joint, a body and a lower joint, the centering block is provided with a centering spring, a sleeve with a positioning pin is engaged with a track groove on the center pipe, the anti-rotating device consists of a radial anchoring mechanism and an axial anchoring mechanism, the axial anchoring mechanism is engaged with the slip teeth via the conical joint, the radial anchoring mechanism is engaged with the center tube and a sleeve tube via anti-rotating teeth which are horizontally arranged and uniformly distributed on the body engaged with the centering block, the radial anchoring mechanism and the centering spring are distributed at an interval, a cross section of the engagement position of the center tube is in the shape of a cam, and a through hole is arranged at the center of the cam. The screw pump anchor adds an anti-rotating function, a right-angle anchoring bonding force and pumping rod torque force combination generated by the screw pump anchor leads axial and radial anchoring functions to be more stable, not only effectively stops overlapped vibration during operation of the pump but has double safety functions of upper and lower slip setting, thereby fundamentally eliminating and stopping major incidents caused by pump trip, tube trip, rotation and counter rotation, increasing economical efficiency and bringing convenience for construction and operation.

Description

Anchoring device of screw pump

Technical field

The utility model relates to the special equipment in a kind of oil exploration and extraction industry, and particularly a kind of being used in fixed the anchoring device of screw pump that a whole set of oil rig uses in the sleeve pipe.

Background technology

The anchor that existing job site is used, much still adopt the one-way slip compression, the degree of crook that causes oil pipe is serious, therefore cause oil pipe radially eccentric wear seriously vibrate aggravation, anchor and not firm, the dropout phenomenon often produces, the maintenance pump detection and workover is frequent, also can't satisfy the needs that big displacement screw pump recovers the oil, need stator tube simultaneously in the down-hole screw pump oil production process, to prevent the same commentaries on classics of screw pump running duration of work stator tube with anchor standing screw pump, the counter-rotating of stator tube during termination of pumping, if stator tube will cause stator tube thread off to cause the fall accident of well of oil pipe with oil pipe with commentaries on classics, pump just can't carry out oil producing operation, thereby causes great economic loss.

The patent No. 200720014657.9 " pull-type anchoring device of screw pump ", this patent only central tube are provided with two commutation rail grooves, and uniform three slips of cylindrical prevent casing deformation, and make set accurately, deblocking is convenient.

Number of patent application 200610042384.9 " oil production subsurface screw pump anchoring device " only improves the annexation between slips, slips holder, cone, interior pipe, makes the oil pipe can be crooked, reduces the factor that causes oil pipe, sucker rod wearing and tearing.

Above-mentioned two patents all do not have anti-rotation structure and the function that prevents that effectively the screw pump stator tube from rotating.

Summary of the invention

Technical problem to be solved in the utility model is: a kind of anchoring device of screw pump is provided, the operate as normal and the grappling function that can guarantee screw pump are firm, fundamentally eliminate a series of production accidents such as pump takes off, pipe takes off, commentaries on classics together, counter-rotating, prolong the production service cycle of pump, can also satisfy the requirement that big displacement screw pump recovers the oil simultaneously.

The technical scheme that the utility model addresses the above problem employing is: anchoring device of screw pump, comprise central tube and with the tapered joint head, body, lower contact connects, described body upper end is connected with cutting ferrule, between central tube and cutting ferrule, use pull-out piece spring screw, stage clip connects slip insert, the cover of described body lower end fixed band shop bolt, and shop bolt cooperates with rail groove on the central tube, described body middle part fixed band is set upright the wiper block of spring, also include anti-rotation device, described anti-rotation device is by radially anchor mechanism and axial anchor mechanism constitute, described axial anchor mechanism is cooperated with slip insert by the tapered joint head, described radially anchor mechanism by with body that wiper block cooperates on uniform horizontal direction anti-rotation tooth and the central tube installed, sleeve pipe cooperates, and with to set upright spring spaced apart, the cross section of described central tube cooperation place is the middle cam-shaped that through hole is arranged.

The length of the cam-shaped of described central tube cooperation place is 2～2.5 times of body length, and central tube upper and lower end cross section is circular.

The external surface of described anti-rotation tooth has the sawtooth of prismatic, a surface relative with sawtooth is complementary for arc and central tube cam face, interposition is equipped with rectangular opening, axially tightly be embedded with bar strip at rectangular opening, also respectively be evenly equipped with two springs on the anti-rotation tooth upper/lower terminal periphery, one end of spring is connected on the bar strip, the other end of spring is also installed pressing plate on the anti-rotation tooth, with bridge screw pressing plate is fixed on the body, the anti-rotation dentifrice water is flat, uniform, be slidingly mounted in body periphery and the corresponding breach of wiper block.

The rail groove of described central tube external surface is by going into the well rail groove and set rail groove and form.

Compared with prior art, advantage of the present utility model is: this anchor is to utilize the cooperation of tapered joint head and slip insert to carry out nature seat card and constitute axial grappling, therefore can not push oil pipe and cause the tubing bending phenomenon serious, thus make oil pipe radially eccentric wear reduce antihunt action in addition to greatest extent.This anchor has also increased the anti-rotation tooth of being installed by the cam structure of central tube and level and has cooperated the radially grappling of making up with sleeve pipe in addition, radially, axially the auxilliary mutually grappling chain that meets at right angles of grappling has constituted anti-rotation device, increased anti-rotating function, the right angle grappling chain of its generation is made a concerted effort and the torsion combination of sucker rod makes axial, radially grappling function is more firm, not only the superpositing vibration between pump operation is effectively contained, on also having, following dual seat card safety effect, therefore fundamentally eliminate, stoped because of pump and taken off, pipe takes off, with changeing, the major accident of reversing and causing, prolonged application life, reduced inspection pump maintenance activity, improved the working efficiency of screw pump, economic benefit also can satisfy the requirement that big displacement screw pump recovers the oil.

Description of drawings

Fig. 1, structural representation of the present utility model.

The A-A view of Fig. 2, Fig. 1.

The B-B view of Fig. 3, Fig. 1.

The C-C view of Fig. 4, Fig. 1.

The expanded view of Fig. 5, central tube rail groove.

The specific embodiment

Below in conjunction with accompanying drawing embodiment of the present utility model is further described.

Body 10 has the ladder of through hole cylindrical for middle, is assemblied in to be the pedestal structure of anchor on the central tube 17.

2～3 uniform rail grooves 16 (by the size decision of anchor) are arranged on the external diameter surface of central tube 17.

Rail groove 16 again by the rail groove 16-1 that goes into the well, set rail groove 16-2 and form, as shown in Figure 5.

The cross section at central tube 17 two ends is the middle circle that through hole is arranged, and the mid portion cross section is the three limit cam-shaped that through hole is arranged, and the length of cam-shaped central tube is 2～2.5 times of body 10 length, as Fig. 1, shown in Figure 3.

The facing 5 that locating ring is arranged in the middle of the top of body 10 connects with internal and external screw thread, 17 of facing 5 and central tubes are inserted in the lower end of slip insert 8, the slip insert upper end is unsettled, the lower end is seated on the locating ring of facing 5, the rip tooth is arranged on the external surface of slip insert, also in facing 5 upper ends with stage clip 7, pull-out piece spring screw 6 is connected each slip insert 8 on the facing and facing 5 connects into integral body.

Band is installed at the middle part of body 10 sets upright the wiper block 3 of three uniform vertical bar shapeds of spring 4, as shown in Figure 1.

Set upright the spring 4 except that uniform three on the outer body of wiper block 3, also at interval, uniform, be horizontally installed with three anti-rotation teeth 12, and set upright spring 4 uniform being installed on upper and lower 4 different aspects of wiper block.

Identical prismatic sawtooth is arranged on the external surface of three uniform anti-rotation teeth 12, relative with a sawtooth surface is complementary for arc and with the cam face of central tube 17, anti-rotation tooth interposition is equipped with a rectangular opening, axially tightly be embedded with bar strip 12-1 at rectangular opening, on the anti-rotation tooth, also respectively be evenly equipped with two springs 11 on the body 10 of two end peripheries down, one end of spring 11 is fixed on the bar strip 12-1, pressing plate 13 also is installed on the other end of spring 11, with bridge screw 14 pressing plate 13 is fixed on and is used for fixing spring 11 on the body 10, anti-rotation tooth 12 levels, uniform, be slidingly mounted in body 10 peripheries and the corresponding breach of wiper block.

At the bottom of body 10 screw thread and uniform check pin 2 fixed covers 1, the male end at wiper block 3 two ends tightly is embedded in respectively in facing 5, cover 1 the upper and lower female end and is fixed into one, overlapping three uniform on 1 shop bolts 15 and the rail groove 16 on central tube 17 external diameter surfaces is slidingly matched, the upper end of central tube 17 is threaded with tapered joint head 9, the lower end is threaded with lower contact 18 upper ends, and the lower end of lower contact 18 is connected (figure does not draw) with the oil pipe tail end.

Shop bolt 15 is in the D point position of rail groove 16 centres when beginning to go into the well, as shown in Figure 5, constantly put into the down-hole along with anchoring device of screw pump, shop bolt 15 constantly moves up as for the top dead centre E place of the rail groove 16-1 that goes into the well, with anchor down when the planned well deep-seated is put, (tubing string is whole oil pipe to the upper lifting pipe post again, joint, the abbreviation that downhole tool links together), shop bolt changes voluntarily to setting rail groove, transfer tubing string again, shop bolt 15 slides into the F place that sets rail groove 16-2 voluntarily, at this moment tapered joint head 9 cooperates nature to sit card with slip insert 8, axially grappling is finished, and axially grappling has antihunt action, absorb vibration source and impel deciding of pump, rotor running working environment is greatly improved.

Then under the external force effect of ground, the tubing string clockwise direction is rotated 60 °, at this moment the cam surface on the central tube 17 also rotates in rotary course, cam will be ejected the breach of anti-rotation tooth from body 10 to sleeve pipe 19 inwalls, the torsion that screw pump produces in operation process also acts on stator tube makes it also want clockwise direction to rotate, at this moment head on the rotation that sleeve pipe 19 inwalls have just stoped stator tube all the time by the three uniform anti-rotation teeth 12 that stretch out, and born radially grappling by the anti-rotation tooth, by the tapered joint head, slip insert is born the auxilliary mutually form right angle grappling chain of axial grappling, reach the purpose of anti-rotation at last, play the firm effect of grappling, make screw pump energy operate as normal.

If in the time of will examining pump or active well operation, as long as direct upper lifting pipe post, shop bolt 15 slides to the D point voluntarily down, at this moment the anti-rotation tooth is given up the throne under the effect of rail groove and spring 11 and is got back in the breach on the body, different sleeve pipe 19 contacts, at this moment just can successfully trip out whole tubing string from the down-hole to ground, it is simple, easy to operate to construct.

Claims

1. anchoring device of screw pump, comprise central tube (17) and with tapered joint head (9), body (10), lower contact (18) connects, described body (10) upper end is connected with cutting ferrule (5), between central tube (17) and cutting ferrule (5), use pull-out piece spring screw (6), stage clip (7) connects slip insert (8), the cover (1) of described body (10) lower end fixed band shop bolt (15), and shop bolt (15) cooperates with rail groove (16) on the central tube (17), described body middle part fixed band is set upright the wiper block (3) of spring (4), it is characterized in that also including anti-rotation device, described anti-rotation device is by radially anchor mechanism and axial anchor mechanism constitute, described axial anchor mechanism is cooperated with slip insert (8) by tapered joint head (9), described radially anchor mechanism is gone up the anti-rotation tooth (12) and central tube (17) that uniform horizontal direction is installed by the body (10) that cooperates with wiper block (3), sleeve pipe (19) cooperates, and with to set upright spring (4) spaced apart, the cross section of described central tube (17) cooperation place is the middle cam-shaped that through hole is arranged.

2. anchoring device of screw pump according to claim 1, the length that it is characterized in that the cam-shaped of described central tube (17) cooperation place are 2～2.5 times of body (10) length, and central tube (17) upper and lower end cross section is circular.

3. anchoring device of screw pump according to claim 1, the external surface that it is characterized in that described anti-rotation tooth (12) has the sawtooth of prismatic, a surface relative with sawtooth is complementary for arc and central tube (17) cam face, interposition is equipped with rectangular opening, axially tightly be embedded with bar strip (12-1) at rectangular opening, on the anti-rotation tooth (12), also respectively be evenly equipped with two springs (11) on two end peripheries down, one end of spring (11) is connected on the bar strip (12-1), the other end of spring is also installed pressing plate (13) on anti-rotation tooth (12), pressing plate (13) is fixed on the body (10) anti-rotation tooth (12) level with bridge screw (14), uniform, be slidingly mounted in body (10) periphery and the corresponding breach of wiper block (3).

4. anchoring device of screw pump according to claim 1, the rail groove (16) that it is characterized in that described central tube (17) external surface are by the rail groove of going into the well (16-1) and set rail groove (16-2) and form.