CN206111149U - There is pole oil jack and oil recovery mechanism thereof - Google Patents

Abstract

The utility model discloses a there is pole oil jack and oil recovery mechanism thereof, wherein, oil recovery mechanism includes sleeve pipe, oil pipe, sucker rod and installs the oil -well pump in the oil pipe lower part, the sleeve pipe includes outer tube and inner tube, leave the clearance between outer tube and the inner tube, the oil -well pump includes pump barrel, plunger, solid fixed valve seat, is located ball valve and plunger pull rod on the solid fixed valve seat, plunger pull rod and sucker rod fixed connection, on being located the plunger and consolidating the lateral wall between the fixed valve seat, the pump barrel is provided with at least one first check valve, the plunger is connected with the sucker rod, the bottom and the inner tube of pump barrel pass through seal receptacle fixed connection, the top position of inner tube is equipped with the oil -out. The utility model provides a technical scheme, for the world initiates, adopt above -mentioned technical scheme after, can stop the sucker rod completely when upper and lower twitchs, and the wearing and tearing of production between the oil pipe to greatly improve the life of oil pipe and sucker rod, saved the oil well running cost.

Description

Pumping unit with pole and its oil recovery mechanism

Technical field

The utility model is related to petroleum technology field, more specifically, it relates to a kind of pumping unit with pole and its oil recovery Mechanism.

Background technology

Oil is one of important resource of China, and at present, the oil of land on oil well mainly by installing oil pumping Realizing the exploitation to oil, common oil rig is pumping unit with pole to device, and the oil pumper of rod oil pumping device is in work When, crude oil directly by oil pipe output go, sucker rod move up and down when, can and oil pipe friction, and exist in crude oil compared with Many impurity, can cause sucker rod to be worn with oil pipe, if things go on like this, must just change oil pipe or sucker rod, this for Length is typically greater than for the oil pipe of 1.5km and sucker rod, a cost for moving often hundreds of thousands, significantly increases oil well Operation cost.According to incompletely statistics, 14 years Chinese well rod maintenance costs are up to 48,000,000,000, it is seen then that this expenditure is very huge Big.Therefore, how to reduce the abrasion of oil pipe and sucker rod, to improve its service life, become current well maintenance work Middle problem demanding prompt solution.

Utility model content

In view of the shortcomings of the prior art, first purpose of the present utility model is to provide a kind of oil recovery mechanism, is led to The abrasion of over-subtraction little oil pipe and sucker rod, and then extend the service life of oil recovery mechanism, reduce maintenance cost.

For achieving the above object, the utility model provides following technical scheme：

A kind of oil recovery mechanism, including sleeve pipe, oil pipe, sucker rod and the oil well pump installed in oil pipe bottom；Described sleeve pipe Including outer tube and inner tube, between the outer tube and inner tube gap is left；The oil well pump includes pump barrel, plunger, fixed valve base, position Ball valve and plunger pull bar on fixed valve base, the plunger pull bar is fixedly connected with sucker rod；The pump barrel is located at plunger At least one first check valves are provided with side wall between fixed valve base；The plunger is connected with sucker rod；The pump barrel Bottom be fixedly connected by seal receptacle with inner tube；The tip position of said inner tube is provided with oil-out.

By above technical scheme, when sucker rod is in pull-up, ball valve is opened, and crude oil is inhaled in pump barrel, works as original When the liquid level of oil exceedes check valve, it is lentamente flowed between oil pipe and inner tube from check valve；When sucker rod is transferred, valve ball Close, pump barrel is located at the cavity pressure below plunger and raises so that crude oil is rapidly flowed between oil pipe and inner tube；It is so past Multiple, crude oil just can be transported to ground from the oil-out of inner tube.Thus, being just not in crude oil between sucker rod and oil pipe, enter And the degree of wear that sucker rod is caused when with oil pipe phase mutual friction can be reduced.

Preferably, multiple check valves are uniformly distributed along the circumference of pump barrel.

By above technical scheme, it is possible to increase the speed that crude oil flows out from pump barrel, it is to avoid when declining because of plunger, pump barrel is let out Pressure zone it is slow, cause the crude oil velocity of discharge excessively slow, affect rate of oil production.

Preferably, installing hole is offered on the side wall of the pump barrel, outer wall and the installing hole screw thread of the check valve coordinate.

By above technical scheme, the fast assembling-disassembling of check valve is capable of achieving.

Preferably, the inwall of the installing hole is provided with recessed shoulder, and on the recessed shoulder sealing ring is provided with.

By above technical scheme, the sealing of check valve and installing hole can be increased.

Preferably, it is coated with lubricant grease on the bar wall of the sucker rod.

By above technical scheme, can further reduce the degree of wear of R a T.

Preferably, it is provided with screen casing below the fixed valve base.

By above technical scheme, sandstone can be effectively prevented from and entered in pump barrel, be resulted in blockage.

Preferably, it is provided between said inner tube and oil pipe plus electric heating cable.

By above technical scheme, appropriate insulation is carried out using the crude oil for adding electric heating cable internally to manage and between oil pipe, Crude oil is avoided to occur to condense and cause the low trouble of oil recovery efficiency.

Preferably, it is provided with from sealed packer in said inner tube.

By above technical scheme, the inwall of outer wall and outer tube from sealed packer is close to, so can avoid crude oil from Gap location between inner and outer tubes rises, and plays the purpose of packing crude oil payzone；Simultaneously, additionally it is possible to liquid and pressure between isolation layer Power, protection outer tube is unaffected, so as to improve the condition of work of outer tube.

Second purpose of the present utility model is to provide a kind of oil pumper, low with long service life, maintenance cost Feature.

For achieving the above object, the utility model provides following technical scheme：

A kind of pumping unit with pole, including the oil recovery mechanism described in oil pumper and such scheme.

Preferably, oil pumper includes frame, walking beam, horse head, connecting rod, crank, reduction box and motor, arranges on horse head There is polished rod eye, the polished rod eye is fixedly connected with the top of sucker rod.

By above technical scheme, when oil pumper works, motor is passed to high speed rotary motion by driving belt The input shaft of reduction box, drives walking beam up and down reciprocatingly to swing, Jin Eryou by the crank of low speed rotation Jing after slowing down by connecting rod The horse head Jing polished rod eyes of beam front end arc-shaped drive rod string up and down reciprocatingly to move along a straight line.

Description of the drawings

Fig. 1 is the overall structure figure of pumping unit with pole；

Fig. 2 is the structure chart of packer；

Fig. 3 is the structure chart of metal reinforcement assembly；

Fig. 4 is the structure chart of seal receptacle；

Fig. 5 is the mounting structure figure of check valve.

Reference：1st, frame；2nd, walking beam；3rd, connecting rod；4th, crank；5th, reduction box；6th, motor；7th, horse head；8th, hanging rope Device；9th, packing box；10th, sleeve pipe, 101, inner tube；1011st, oil-out；1012nd, shallow slot；102nd, outer tube；11st, oil pipe；12nd, pump Pump；121st, pump barrel；1211st, installing hole；1212nd, recessed shoulder；122nd, plunger；123rd, ball valve；124th, fixed valve base；13rd, check valve； 14th, sucker rod；15th, sealing ring；16th, packing element is expanded；17th, spacing ring；171st, stopper slot；172nd, the first storage tank；173rd, spring Storage tank；18th, the first baffle ring；19th, sealing device；191st, graphite packing；192nd, dust ring；193rd, Sealing shield ring；20th, bullet is compressed Spring；201st, spring opening baffle ring；21st, bushing pipe；22nd, bearing ring；221st, pregroove marks；23rd, metal reinforcement assembly；231st, steel Bar；232nd, conical surface pressure ring；24th, packer；25th, plunger pull bar；26th, seal receptacle；261st, the first caulking groove；262nd, the second caulking groove； 263rd, the 3rd caulking groove；27th, electric heating cable is added.

Specific embodiment

With reference to embodiment and accompanying drawing, the utility model is described in further detail, but reality of the present utility model The mode of applying is not limited only to this.

Embodiment 1：

With reference to Fig. 1, one kind oil pumping mechanism, including sleeve pipe 10, oil pipe 11, sucker rod 14 and installed in the bottom of oil pipe 11 Oil well pump 12.

Sleeve pipe 10 includes outer tube 102 and inner tube 101, and gap is left between outer tube 102 and inner tube 101, is provided with inner tube Packer 24, outer wall and the inwall of outer tube 102 of the packer 24 are brought into close contact.

With reference to Fig. 2, Fig. 3, packer 24 includes self-expanding packing element 16 and two spacing rings 17.Said inner tube 101 can be axial Movably it is located in the inside of self-expanding packing element 16.Each spacing ring 17 is respectively sleeved at the outside of inner tube 101, and fixes respectively The two ends of self-expanding packing element 16 are connected to, the inside of each spacing ring 17 is provided with normal temperature can make spacing ring 17 and inner tube 101 It is relatively fixed, but the first baffle ring 18 of spacing ring 17 and the Relative Floating of inner tube 101 can be made when it rises to high temperature values, it is described interior Dynamic sealing device 19 is provided between pipe 101 and spacing ring 17.

Wherein, self-expanding packing element 16 can be made using meeting oily self-expanding rubber or meeting water self-expanding rubber.

" high temperature values " in the present embodiment are referred to can be made the deformation of the first baffle ring 184 and then spacing ring 173 is departed from internally The temperature value that pipe 1011 is fixed, it is typically at (90-300 DEG C).

In normal temperature original state, two spacing rings 17 are connected to inner tube with being relatively fixed due to the effect of the first baffle ring 18 Also it is relatively-stationary between self-expanding packing element 16 and inner tube 101 now on 101.Then, packer 24 is gone into the well, self-expanding glue Cylinder 16 absorb hydrocarbons or water carry out self-expanding and carry out it is setting, when starting to inject steam or touch high temperature fluid, Downhole temperature is gradually increasing, and after temperature rises to high temperature values, the first baffle ring 18 deforms so that the glue of spacing ring 17 is to inner tube 101 Fixation, i.e., now spacing ring 17 can be with the body Relative Floating of oil pipe 11, and self-expanding packing element 16 is with spacing ring 17 and inner tube 101 also can Relative Floating, therefore inner tube 101 will not produce on self-expanding packing element 16 by thermogenetic dilatation and be affected so that The setting effect of packer 24 is good.Wherein, when dynamic sealing device 19 can ensure that inner tube 101 is floated relative to self-expanding packing element 16, Packer 24 still has good sealing.

The inside of each spacing ring 17 is provided with stopper slot 171, and the outside of said inner tube 101 is provided with shallow slot 1012, Under normal temperature state, the outboard end of first baffle ring 18 is contained in stopper slot 171, and medial extremity is contained in shallow slot 1012. That is, in normal temperature, because the first baffle ring 18 is fastened in stopper slot 171 and shallow slot 1012 so that spacing ring 17 and inner tube 101 are relatively fixed, but when the first baffle ring 18 meets high-temperature expansion, and the expansion rate of the first baffle ring 18 may be generally higher than inner tube 101 expansion rate, so that the medial extremity of the first baffle ring 18 can depart from the shallow slot 1012 of inner tube 101, so that inner tube 101 can phase For spacing ring 17 fluctuates, now, the material of the first baffle ring 18 is generally metal material, for example, marmem (SMA), can be further Fe-Mn-Si marmems.Depending on the material of first baffle ring of depth visual 18 of shallow slot 1012, Generally 2-4mm.

Wherein, it is the characteristics of marmem：In its higher transition temperature point processing part, part meeting " is remembered " The oneself state during temperature, part may be deformed to required shape in normal temperature after machining, when system work, surrounding When temperature reaches the transition temperature of marmem, part restPoses automatically.That is, the first baffle ring 18 is adding Man-hour, temperature must rise to more than transition temperature, so that it " remembers " original shape, after machining, at normal temperatures by first The external diameter of baffle ring 18 suitably reduces, so that first baffle ring 18 in assembling of packer 24 can be entered in inner tube 101.Herein, make " high temperature values " of the deformation of the first baffle ring 18 are referred to its " transition temperature ".

Additionally, the first baffle ring of limit opening 18 also can be plastic material, it may be stuck at normal temperatures stopper slot 171 and shallow slot In 1012, inner tube 101 is set to be relatively fixed with spacing ring 17, but first baffle ring 18 occurs when running into high temperature and is softened or melted Situation, so can also make inner tube 101 and the Relative Floating of spacing ring 17.Wherein, the plastic material of the first baffle ring 18 may depend on The downhole temperature of different wells, furthermore, the material of first baffle ring 18 for example can be nylon, when it reaches 170 DEG C of temperature Situation about being softened or melted occurs, but in normal temperature with enough intensity and hardness, to support the axial direction of inner tube 101 Power.

The He of the first storage tank 172 is being disposed with inside each described spacing ring 17 near one end of self-expanding packing element 16 Spring mounting groove 173, the first storage tank 172 is located at one end of spring mounting groove 173, and the radius of the first storage tank 172 is more than The radius of spring mounting groove 173, being internally provided with for each the first storage tank 172 can be reduced when temperature rises to a predetermined temperature To depart from the spring opening baffle ring 201 that the card of the first storage tank 172 sets, the compression spring 20 is set in the outside of inner tube 101 simultaneously Inside spring mounting groove 173, and one end contact of compression spring 20 is on the end face of spring opening baffle ring 201, the other end Contact in spring mounting groove 173, using marmem made, for example, Fe-Mn-Si by the spring opening baffle ring 201 Marmem.

In the present embodiment, spring opening baffle ring 201 is adding man-hour, and temperature must rise to its transition temperature, after machining, The external diameter of spring opening baffle ring 201 is suitably expanded in normal temperature state so that packer 24 assembling when, spring opening baffle ring 201 outboard end can be entered in the first storage tank 172 of spacing ring 17.Under normal temperature original state, marmem manufacture Spring opening baffle ring 201 there is enough intensity and hardness, and be embedded in the first storage tank 172 so that spring opening keeps off Ring 201 can bear axial force very big after the pretension of compression spring 20, and now, the axial force of compression spring 20 is only applied to spring On opening baffle ring 201, do not act on self-expanding packing element 16.After packer 24 is gone into the well, downhole temperature gradually rises, when When it rises to the transition temperature of spring opening baffle ring 201, spring opening baffle ring 201 reduces the card for departing from the first storage tank 172 If also just losing the support to compression spring 20, the axial force of compression spring 20 then can be applied on self-expanding packing element 16, made certainly The shoulder of expansion packing element 16 is strengthened, and further improves the reliability under the sealability and high temperature of self-expanding packing element 16, from And the setting effect of stable self-expanding packing element 16, to ensure the validity of the long term seal in high temperature environments of packer 24.

Packer 24 also includes bushing pipe 21, and the two ends of self-expanding packing element 16 are respectively in connection with having bearing ring 22, self-expanding packing element 16 are bound together outside bushing pipe 21 with bearing ring 22, and the two ends of bushing pipe 21 are in exposed parts, and the exposed parts of bushing pipe 21 are plugged Enter in the spring mounting groove 173, now by welding bushing pipe 21 can be made to be fixed with spacing ring 17, the compression spring 20 are set in outside bushing pipe 21, and the bearing ring 22 connects the spring opening baffle ring 201.When spring opening baffle ring 201 reduces And when losing the support to compression spring 20, compression spring 20 can be made by bearing ring 22 to the imposed load of self-expanding packing element 16 The shoulder uniform force of self-expanding packing element 16, and its intensity and hardness strengthened.

Additionally, the packer 24 also includes the metal reinforcement assembly 23 of annular, the metal reinforcement assembly 23 main body is embedded in the inner end portion of the self-expanding packing element 16, and the other end connects the bearing ring 22, and the metal is strengthened Bar assembly 23 is bonded in outside the bushing pipe 21.Specifically, metal reinforcement assembly 23 includes multiple steel bars 231, Duo Gegang Bar 231 has conical surface pressure ring 232 uniformly around cylindrical, one end of multiple steel bars 231 is formed, and the bearing ring 22 is provided with Pregroove marks 221 with taper, the conical surface pressure ring 232 of multiple steel bars 231 is inserted in the pregroove marks 221 of the bearing ring 22.Enter one For step, the pregroove marks 221 being relatively large in diameter of bearing ring 22 be it is tapered, it is identical with the taper in the outside of conical surface pressure ring 232.Will Conical surface pressure ring 232 is pressed into the pregroove marks 221 of bearing ring 22, because the effect steel bar 231 of frictional force will be by wedging.The present embodiment The conical surface pressure ring 232 of multiple steel bars 231 is arranged in pregroove marks 221, it is ensured that arrange equal between metal reinforcement assembly 23 Cloth and closely.Be embedded with endless metal stiffener assembly 23 in the shoulder of self-expanding packing element 16, to expand it is setting after self-expanding glue Cylinder 16 plays a part of reinforcing and supports.

Dynamic sealing device 19 includes graphite packing 191 and Sealing shield ring 193, and Sealing shield ring 193 is arranged on graphite packing 191 One end, Sealing shield ring 193 can be fixed to graphite packing 191.Additionally, dynamic sealing device 19 also includes dust ring 192, prevent Konisphere 192 is arranged on one end of graphite packing 191.Dynamic sealing device 19 can avoid high temperature and high pressure steam or other downhole fluids Altered packer 24.

Assembling process is as follows：High temperature resistant binder is coated in the outer surface of bushing pipe 21, by self-expanding packing element 16, metal is strengthened Bar assembly 23 and bearing ring 22 are bound together, are molded, vulcanizing on bushing pipe 21, work in-process, and bonding, molding can be with sulfuration Synchronously complete in vulcanizer.Then compression spring 20 is put in the spring mounting groove 173 of spacing ring 17, then spring opening Baffle ring 201 is arranged in the first storage tank 172, and compression spring 20 is in compressive state after installing.Compression spring 20 will be installed Bushing pipe 21 is inserted in the spacing ring 17 of spring opening baffle ring 201, the exposed parts for making bushing pipe 21 are inserted in spring mounting groove 173, Bushing pipe 21 is fixed together with spacing ring 17 by welding.Then, graphite packing 191 and dust ring 192 are arranged on In the corresponding groove of spacing ring 17, and it is fixed using Sealing shield ring 193.First baffle ring 18 is arranged on into the spacing of spacing ring 17 In groove 171, then inner tube 101 is passed through into spacing ring 17 from middle, make the first baffle ring 18 enter the corresponding shallow slot 1012 of inner tube 101 It is interior, it is ensured that inner tube 101 is fixed relative to spacing ring 17 and bushing pipe 21.

With reference to Fig. 1, oil well pump 12 includes pump barrel 121, plunger 122, fixed valve base 124, the valve on fixed valve base 124 Ball and plunger pull bar 25；Plunger 122 is connected with sucker rod 14；The bottom of pump barrel 121 is sealed by seal receptacle 26 with inner tube 101 Connection.In addition, being provided with screen casing 16 in the lower section of fixed valve base 124, screen casing 16 is fixed on seal receptacle 26.

With reference to Fig. 4, the upper surface of seal receptacle 26 is respectively arranged with the first caulking groove 261 fixed for inner tube 101 and pump barrel 121 Second caulking groove 262, and the lower surface of seal receptacle 26 are provided with the 3rd caulking groove 263 installed for screen casing 16.Wherein, inner tube 101 and screen casing 16 can welding or mode connects for screw by way of fix, pump barrel 121 can be to be directly inserted in the second caulking groove 262 It is interior, in order to increase sealing, can be in the setting seal of the second caulking groove 262（Not shown in figure）.

With reference to Fig. 5, pump barrel 121 is located on the side wall between plunger 122 and fixed valve base 124 and offers at least one installation Hole 1211, as needed, can open up multiple, and the circumference along pump barrel 121 is uniformly distributed.Meanwhile, in each installing hole 1211 Inside it is threadedly coupled a check valve 13.In addition, the inwall in installing hole 1211 is provided with recessed shoulder 1212, arrange on recessed shoulder 1212 There is sealing ring 15, thus, when check valve 13 is installed, the sealing of check valve 13 and installing hole 1211 can be increased.

The oil recovery principle of the present embodiment is：

The post of sucker rod 14 pulls up plunger 122, now, the lower pump chamber increase below plunger 122, pressure drop in pump Low, the ball valve 123 on fixed valve base 124 is descended thereon under differential pressure action and opened, in crude oil suction pump barrel 121（Plunger 122 with it is solid Determine the part between valve seat 124）.When sucker rod 14 declines, then plunger 122 declines under deadweight so that the pressure in pump barrel 121 Raise so that ball valve 123 is closed, at the same time, crude oil then directly by check valve 13 is flowed into inner tube 101 and pump barrel 121（Or Oil pipe 11）Between, if inner tube 101 and pump barrel 121（Or oil pipe 11）Between existed full of crude oil, then crude oil can be from inner tube Top exit between 101 and oil pipe 11 flows out.

In addition, the degree of wear in order to further reduce sucker rod 14 and oil pipe 11, applies on the bar wall of sucker rod 14 It is covered with lubricant grease.In coating, lubricant grease is coated on into the top of sucker rod 14, if environment temperature is relatively low, can be first right Lubricant grease is heated so as to can be flowed, then lubricant grease can flow downward under deadweight along sucker rod 14, until will Whole sucker rod 14 is coated.Consequently, it is possible to sucker rod 14 move up and down, due to the presence of lubricant grease, itself and oil pipe 11 it Between frictional force can be reduced, and then, abrasion also can be less.

Embodiment 2：

With reference to Fig. 1, a kind of pumping unit with pole, including ground driving equipment is the oil recovery in oil pumper, and embodiment 1 Mechanism.

Oil pumper adopts beam type, and it includes frame 1, walking beam 2, horse head 7, connecting rod 3, crank 4, reduction box 5 and electronic Machine 6.The top of inner tube 101 is provided with packing box 9, plays a part of sealing, and sucker rod passes through packing box 9, and solid with polished rod eye 8 Fixed connection.When oil pumper works, high speed rotary motion is passed to motor 6 input shaft of reduction box 5, Jing by driving belt Walking beam 2 is driven up and down reciprocatingly to swing by connecting rod 3 by the crank 4 of low speed rotation after deceleration, and then the front end arc-shaped of walking beam 2 7 Jing polished rod eyes of horse head 8 drive the post of sucker rod 14 up and down reciprocatingly to move along a straight line.

With reference to Fig. 1, Fig. 4, it is provided between inner tube 101 and oil pipe 11 plus electric heating cable 27, plus electric heating cable 27 passes through packing Box 9, and be connected with controller.

Claims (10)

1. a kind of oil recovery mechanism, is characterized in that, including sleeve pipe (10), oil pipe (11), sucker rod (14) and installed in oil pipe (11) oil well pump (12) of bottom；It is characterized in that, described sleeve pipe (10) includes outer tube (102) and inner tube (101), the outer tube (102) gap is left and inner tube (101) between；The oil well pump (12) includes pump barrel (121), plunger (122), fixed valve base (124), the ball valve on fixed valve base (124)（123）And plunger pull bar（25）, the plunger pull bar（25）With sucker rod （14）It is fixedly connected；The pump barrel (121) is provided with least on the side wall between plunger (122) and fixed valve base (124) One the first check valve (13)；The plunger (122) is connected with sucker rod (14)；The bottom of the pump barrel (121) and inner tube (101) by seal receptacle（26）It is fixedly connected；Said inner tube（101）Tip position be provided with oil-out（1011）.

2. oil recovery mechanism according to claim 1, is characterized in that, multiple check valves (13) are along the circumferential equal of pump barrel (121) Even distribution.

3. oil recovery mechanism according to claim 2, is characterized in that, on the side wall of the pump barrel (121) installing hole is offered (1211), the outer wall of the check valve (13) coordinates with installing hole (1211) screw thread.

4. oil recovery mechanism according to claim 3, is characterized in that, the inwall of the installing hole (1211) is provided with recessed shoulder (1212), it is provided with sealing ring (15) on the recessed shoulder (1212).

5. oil recovery mechanism according to claim 1, is characterized in that, on the bar wall of the sucker rod (14) lubricating oil is coated with Fat.

6. oil recovery mechanism according to claim 1, is characterized in that, below the fixed valve base (124) screen casing is provided with （16）.

7. oil recovery mechanism according to claim 1, is characterized in that, said inner tube（101）With oil pipe（11）Between be provided with Plus electric heating cable（27）.

8. oil recovery mechanism according to claim 1, is characterized in that, said inner tube（101）On be provided with packer（24）.

9. a kind of pumping unit with pole, is characterized in that, including oil pumper and the arbitrary described oil recovery mechanism of claim 1-8.

10. pumping unit with pole according to claim 9, is characterized in that, oil pumper includes frame (1), walking beam (2), donkey Head (7), connecting rod (3), crank (4), reduction box (5) and motor (6), are provided with polished rod eye (8) on horse head (7), described outstanding Rope device (8) is fixedly connected with the top of sucker rod (14).