Rotary sucker rod nipple anti-drop device
The utility model relates to a kind of preventing in the oil exploitation well, and rod connector connects the device of screw thread escaping-proof.
Deep well oil pumping will lean on the rod string in the oil pipe to drive pump plunger and move reciprocatingly, with oil by extraction ground, shaft bottom.Lean on spiral marking connection between the cloth rod string fully.For example a bite pump setting depth is the oil well of 1600m, and 200 of spiral marking connection joints will be arranged in the rod string.Generally speaking, sucker rod moves back and forth and can reach 14400 times every day.Because the axial force of bearing the tension and compression alternation on the rod string, be subjected to the influence of the variation of the oil well curvature of space simultaneously, and the acting in conjunction of the factors such as reactive torque of the wire rope of wellhead polish rod polished rod eye, cause sucker rod take place to connect the get loose generation of accident of screw thread, thereby cause oil well to stop production, reduce oil well output, increased the oil well operating cost.
At present the home and abroad is that to prevent that sucker rod from connecting the measure of being taked that screw thread gets loose similar, except strengthening tightening torque, generally is on the bottom and the top of rod string a kind of " sucker rod anti-tripping device " to be installed.Fig. 1 is a sucker rod anti-tripping device structural representation, and 1 is female joint among the figure; The 2nd, gland; The 3rd, steel ball; The 4th, pin; The 5th, male joint.The similar bearing that is subjected to responsive to axial force of this device, imagination cause taking off the reactive torque of taking out and can do relative motion in bearing and disappear.The oil recovery field practice proves, the various trip-proof devices of other of similar this principle of device, and effect is not remarkable, and the dropout accident still constantly takes place.
The purpose of this utility model is that a kind of rotary sucker rod nipple anti-drop device will be provided, and it can prevent effectively that the rod string accident that the connecting joint thread looseness is then thrown off in oil recovery process from taking place.
The purpose of this utility model is achieved in that by an oblique mechanism axially-movable to be transformed into and rotatablely moves, and each journey makes the polished rod low-angle that turns clockwise.Polished rod constantly will tighten with the screw thread on the whole rod string nipple that connects mutually below the polished rod in carrying out axially reciprocating, unnecessary rotating cycle will make the oil pump plunger piston that is bound up on the roofbolt foot in the pump barrel inward turning then discharge, thereby prevent the get loose generation of accident of rod connector.For example, when the helical angle on inclined-plane is the vertical effective height on 60 ° of inclined-planes when being 16mm, each washes bar off will rotate 15 ° of 4 ', when oil pumper adopt per minute 8 towards the time, polished rod per hour will rotate 21.41 and enclose in theory.
The utility model is simple in structure, to existing operation, for example bump pump, survey producing fluid level, measuring indicator diagram etc. and all do not have influence, owing in oil recovery process, tighten each spiral marking connection joint on the rod string automatically, continuously, lentamente, both stopped the generation that gets loose of nipple on the sucker rod, force the deep-well oil pump plunger in pump barrel, to do to rotate lentamente again, thereby reduced the generation of pump plunger eccentric wear phenomenon.
Concrete structure of the present utility model is provided by following example and accompanying drawing thereof.
Fig. 2 is the structural profile schematic diagram according to the rotary sucker rod nipple anti-drop device that the utility model proposes.
Describe details in detail below in conjunction with Fig. 2 according to the concrete device that the utility model proposes.
As seen from Figure 2, the utility model comprises two parts: polished rod bearing support and polished rod whirligig.
The polished rod bearing support comprises clamping nut 1, is made up of taper slips 2, appending disk 3, bearing 4 and the bearing support body 5 of interior anchor tooth.The 6th, wellhead polish rod, the 7th, the polished rod eye wire rope on the oil pumper, the 8th, polished rod eye crossbeam.Taper slips 2 is housed on the polished rod 6, and in the taper hole of the appending disk 3 of packing into,, makes the taper slips, axial load bearing 4 is installed between appending disk 3 and the bearing support body 5 the polished rod locking by tightening the screw thread on the clamping cap 1.Therefore, on bearing 4, rod string can rotate on bearing polished rod 6 with the deadweight of the rod string below the polished rod and the whole load seats of the fluid column weight more than the deep well pump plunger.The polished rod whirligig comprises gland nut 9, taper slips 10, pin sleeve 11, back-moving spring 12, bearing pin 13, screw inclined plane sleeve 14, planar tooth clutch lower wall 15 compositions.The 16th, be fixed on the polished rod seal root box of well head.By tightening gland nut 9, taper slips 10 is contained in the inner cone of pin sleeve 11, make pin sleeve 11 and polished rod 6 be fixed into an integral body.Screw inclined plane sleeve 14 is contained in the outside of pin sleeve 11, and can rotate, and then bearing pin 13 is passed the helicla flute on the screw inclined plane sleeve 14, is fixed on the pin sleeve 11.When the screw inclined plane of bearing pin 13 on the screw inclined plane sleeve 14 during to lower slider, will force pin sleeve 11 to drive polished rods 6 and rotate a low-angle because at this moment tiltedly the planar tooth clutch on the sleeve 14 with the lower wall engagement and can not rotate.
Describe the course of work of rotary sucker rod nipple anti-drop device in detail below in conjunction with Fig. 3, Fig. 4, Fig. 5.
Fig. 3 be on Fig. 2 E to view.Among the figure, the 13rd, bearing pin, the 14th, screw inclined plane sleeve.At this moment, bearing pin 13 is in the spiral fluted top on the screw inclined plane sleeve 14.
Fig. 4 is a polished rod when being positioned at down stroke and finishing, the position view of each component of rotary sucker rod nipple anti-drop device.Among the figure, the 6th, polished rod, the 5th, polished rod bearing support, the 7th, polished rod eye wire rope, the 8th, hanger crossbeam, the 11st, pin sleeve, the 12nd, back-moving spring, the 13rd, bearing pin, the 14th, screw inclined plane sleeve, the 15th, planar tooth clutch lower wall.Polished rod 6 is before down stroke finishes, at first be that screw inclined plane sleeve 14 combines with planar tooth clutch lower wall 15, be to lower slider then in the helicla flute of bearing pin 13 on screw inclined plane sleeve 14, and generation moving polished rod 6 do a low-angle rotation, till bearing pin slides into the spiral fluted bottom for 13 times.At this moment, back-moving spring 12 is in compressive state, and polished rod 6 has been done a low-angle rotation in polished rod bearing support 5, do not reverse so hanger crossbeam 8 and polished rod eye wire rope 7 all can not produce.
Fig. 5 is a polished rod when being positioned at upstroke and finishing, the position view of each component of rotary sucker rod nipple anti-drop device.When polished rod 6 leaves the bottom dead centre of down stroke, oppositely move upward, the planar tooth throw-out-of clutch, polished rod 6 is being with pin sleeve 11 upwards, under the deadweight effect of back-moving spring 12 and screw inclined plane sleeve 14, screw inclined plane sleeve 14 glides on bearing pin 13 and rotates, and makes bearing pin 13 reset to spiral fluted top on the screw inclined plane sleeve 14 again.
Fig. 6 is a polished rod when getting back to down stroke once more, the position view of each component of rotary sucker rod bolted joint anti-drop device.When polished rod moves downward, bearing pin 13 is in the helicla flute upper end on the inclined-plane sleeve 14, and the planar tooth clutch has meshed, and polished rod will make polished rod rotate an angle more again to bottom offset.
Therefore, sucker rod polished rod pumping in oil recovery process will make polished rod constantly slowly rotate.