CN106337805A

CN106337805A - Full-bore hollow-core rotor screw pump

Info

Publication number: CN106337805A
Application number: CN201610945599.5A
Authority: CN
Inventors: 王国良
Original assignee: Individual
Current assignee: Individual
Priority date: 2016-11-02
Filing date: 2016-11-02
Publication date: 2017-01-18

Abstract

The invention discloses a full-bore hollow-core rotor screw pump which comprises a stator, a rotor and a positioning short section arranged at the bottom end of the stator. The stator, the rotor and the positioning short section are all of cylinder structures; the wall thickness of the side wall of the stator ranges from 8 mm to 8.7 mm, and the outer diameter of the stator is fit with the inner diameter of a shaft; spiral grooves with the width ranging from 276 mm to 298 mm are machined in the inner wall of the stator; the rotor comprises a metal cylinder sleeved with the inner side of the stator and a runner lining wrapping the outer wall of the metal cylinder, and the thickness of the runner lining ranges from 5 mm to 30 mm; a spiral protrusions capable of achieving coupling fit with the spiral grooves in the inner wall of the stator is are machined on the outer wall of the rotor, an annulus space with the volumnvolume ranging from 25 mL to 55 mL is formed between each spiral groove and the matched spiral protrusion; and the wall thickness of the side wall of the metal cylinder of the rotor ranges from 20 mm to 22 mm, and the inner diameter of the metal cylinder of the rotor ranges from 50 mm to 69 mm. The full-bore hollow-core rotor screw pump is an integrated screw pump system and completion pipe string capable of testing the pressure, achieving liquid drainage exploiting, and meanwhile acheivingachieving cross-pump heating.

Description

Full-bore air-core armature screw pump

Technical field

The present invention relates to winning apparatus and the Technology field such as viscous crude, high solidifying oil and combustible ice, particularly to a kind of complete Latus rectum air-core armature screw pump and.

Background technology

At present, screw pump is heavy crude producing, the high main technique means coagulating oily, marine low temperature oil layer, particularly at deep-sea During combustible ice exploitation, for saving the time, need the process pipe string with screw pump, can carry out testing, sample, press etc. and applying Work.And common carry out this technique, can only be first to descend test string to be tested, then under enter screw pump mining completion tubular column, And in recovery process, when needing test, sampling pressure, then need to propose screw pump mining completion tubular column, thereafter again Under enter screw pump mining completion tubular column, waste time and energy, tedious process, cost is high.Need exploitation one kind can test for this Pressure, can carry out discharge opeing exploitation again, can get over the screw pump of mining completion tubular column of integration and the process of pump heating simultaneously again.

Content of the invention

It is an object of the invention to provide one kind need not repeatedly remove test string i.e. can achieve perforation, test, sampling, Pressure, acidifying, the full-bore air-core armature screw pump of note row, heating and mining.

For this reason, technical solution of the present invention is as follows:

A kind of full-bore air-core armature screw pump, including stator, rotor and orientation spool；Described stator, described rotor and Described orientation spool is tube structure；Wherein:

The side wall wall thickness of described stator is 8～8.7mm, the internal diameter of external diameter and pit shaft is adapted；Inwall in described stator On be machined with the helical groove that width is 276～298mm；

Described rotor includes the metal cylinder being sleeved on inside described stator and overlay on described metal cylinder outer wall Thickness degree is the rubber bushing of 5～30mm；Described rotor outer wall is machined with and the helical groove on described stator inner wall It is capable of the helical raised of coupling cooperation, and each circle helical groove and the formation annular space between helical raised that cooperates Spatial content is between 25～55ml；The internal diameter of described rotor is 50～69mm, side wall wall thickness is 20～22mm；

Described orientation spool is arranged on described stator bottom, and the internal diameter of described orientation spool is less than the outer of described rotor Footpath, makes described rotor be limited on the upper surface of described orientation spool and ensure that all testing tools pass through described rotor simultaneously Transfer to down-hole with the inner chamber of described orientation spool.Specifically, that is, it is allowed to the inner chamber of stator and spacing short circuit can be smoothly By test when all of instrument, and can reach test string connection make integration, reach saving the testing time obtain effect.

By improving to classic screw pump, the packing element effective drift diameter of this full-bore air-core armature screw pump will adapt to By sampler, piezometer, coiled tubing, cross the testing tools such as pump heating system instrument.It is straight that the structure of rotor increases its rotation It is also contemplated that the heating cable of air-core armature passes through outside footpath and diameter of section.Spacing short circuit be limit rotor by and survey can be made Trial work tool and heating system are passed through.

Wherein, described stator is made using silica gel；Rotor is made using n80 steel or p110 steel；Orientation spool adopts n80 steel Make.

Described two ends of rotor is separately installed with conductive plug and electrically conductive socket, and described conductive plug and described electrically conductive socket Between by be arranged on described rotor internal cavity energising cable formed electrical connection.

Specifically, described conductive plug includes conductive plug and includes the first copper rod and be arranged on the first copper rod top surface thin copper Rod；Described electrically conductive socket includes the second copper rod；Cave inward from described second copper rod bottom surface and offer one and described thin copper bar chi Very little adaptable axial socket, offers one from described thin copper bar top and described thin copper bar top is divided into the axially deep of two lobes Groove, is provided with a waveform reed in described axial deep trouth, after making described thin copper bar insert described axial socket, described thin copper bar The two-flap type structure on top expands outwardly under the elastic force effect of reed, remains contact condition with axial socket inwall；? Employing polyethersulfone ketone system between 2～3mm for a layer thickness is covered with the outer wall of described first copper rod and described second copper rod The insulating barrier becoming.

Described stator top and bottom are threaded with top connection and lower contact respectively；Described top connection is used for and oil pipe spiral shell Stricture of vagina connects；Described lower contact is used for being connected with drill rod thread.

Described lower contact is tube structure, and its upper inside wall caves inward and is formed with ring-shaped step；Described orientation spool top End is provided with the annular flange flange cooperating with described ring-shaped step, so that described orientation spool is sleeved on inside described lower contact and limit On described ring-shaped step；At described orientation spool annular flange flange, external diameter is more than described stator outer diameter, makes described lower contact set Dress simultaneously threaded be fixed on described stator bottom and make orientation spool be fixed on described stator bottom simultaneously.

Compared with prior art, this full-bore air-core armature screw pump can test pressure, can carry out discharge opeing exploitation again, with When can get over the screw pump system of integration and the completion tubular column that pump heats again.

Brief description

Fig. 1 is the structural representation of the full-bore air-core armature screw pump of the present invention；

Fig. 2 is the structural representation of the orientation spool of full-bore air-core armature screw pump of the present invention；

Fig. 3 is the structural representation of the conductive plug of full-bore air-core armature screw pump of the present invention；

Fig. 4 is the structural representation of the electrically conductive socket of full-bore air-core armature screw pump of the present invention；

Fig. 5 (a) is full-bore air-core armature screw pump and other working rotor pipe string of being assembled into of parts of the present invention Top half structural representation；

Fig. 5 (b) is the rotor of full-bore air-core armature screw pump and other working rotor of being assembled into of parts of the present invention The latter half structural representation of pipe string.

Specific embodiment

Below in conjunction with the accompanying drawings and specific embodiment the present invention is described further, but following embodiment is absolutely not to this Bright have any restriction.

In order to realize more pump heating and running string need not repeatedly lift and can complete test pressure, can enter again Row discharge opeing is exploited, and therefore devises the full-bore air-core armature screw pump with special construction.

Embodiment 1

Be illustrated in figure 1 a kind of be applied to internal diameter be more than in the pit shaft of 114.3mm carry out testing, the full-bore of discharge opeing operation Air-core armature screw pump, it includes rotor and stator 1 and the orientation spool being arranged on stator 1 bottom being set with and cooperating 4；Wherein:

Stator 1 is tube structure, and it is sleeved on outside described rotor and is machined with width on the inwall of described stator For _ _ more than 5__mm helical groove；The external diameter of stator 1 is 114.3mm, and side wall wall thickness is 8.5mm；

Rotor 2 is tube structure, and it includes the metal cylinder 201 being sleeved on inside described stator and overlays on described metal cylinder A layer thickness on external wall is the rubber bushing 202 of 20mm；The latus rectum of described rotor is 69mm, the side wall of metal cylinder 201 Wall thickness is 20mm, and rotating diameter is 87mm；

The spiral shell being capable of coupling cooperation with the helical groove on described stator inner wall is machined with described rotor outer wall Rotation shape is raised, and wherein, the length of stator 1 and rotor 2 is 7700mm, and on the inwall of stator and rotor, spiral spirals from top to bottom It is formed with multiple tracks spiral coil, often between circle helical groove and the helical raised cooperating, form annular space space capacity about 30 ～35ml, makes the discharge capacity of screw pump reach 500～1000l；

Described stator 1 top and bottom are threaded with top connection 5 and the lower contact 6 of tubular construction respectively；Connect on described Connection female thread for being connected with tubing round thread is formed with 5 inwalls；Be formed with described lower contact 6 outer wall for brill The threaded connection external screw thread of bar；

Orientation spool 4 is also tube structure, and it arranges and is fixed on stator 1 bottom, specifically, lower contact 6 upper inside wall Cave inward and be formed with ring-shaped step, orientation spool 4 top is provided with the annular flange flange cooperating with ring-shaped step, makes positioning short Section 4 is sleeved on inside lower contact and annular flange flange is limited on ring-shaped step；The internal diameter of orientation spool 4 is less than the external diameter of rotor, Make on the spacing top surface in orientation spool 4 in rotor bottom；Lower contact suit and threaded be fixed on stator 1 bottom, make positioning Pipe nipple 4 is fixed on stator 1 bottom；

Wherein, stator is made using silica gel；Rotor and orientation spool are made using n80 steel；

For realizing getting over pump heating, it is respectively provided with and is provided with conductive plug and electrically conductive socket in two ends of rotor, and conductive slotting Form electrical connection by being arranged on the energising cable of rotor internal cavity between head and electrically conductive socket；

As shown in figure 3, conductive plug includes conductive plug and including the first copper rod 801 and is arranged on the first copper rod top surface thin Copper rod 802；As shown in figure 4, electrically conductive socket includes the second copper rod 803；Cave inward from the second copper rod 803 bottom surface offer one with The axial socket 804 that thin copper bar size is adapted, offers one from thin copper bar top 802 end and thin copper bar top is divided into two lobes Axial deep trouth, is provided with a waveform reed 805 in axial deep trouth, after making thin copper bar 802 insert axial socket 804, thin copper bar The two-flap type structure on 802 tops expands outwardly under the elastic force effect of reed 805, remains with axial socket 804 inwall and connects Tactile state；The outer wall of the first copper rod 801 and the second copper rod 803 is covered with one layer or two-layer using polyethersulfone ketone make exhausted Edge layer 3, plays the effect of metal shell insulation of conductive plug and electrically conductive socket and rotor simultaneously, also makes conductive plug and conduction Socket is mounted and fixed on two ends of rotor.

When this full-bore air-core armature screw pump uses, it is completed stator instrumentation tubes string and working rotor pipe string first. Wherein, described stator 1 and orientation spool 4 are connected by lower contact 6, and stator 1 top is connected with top connection, by stator Top connection 5 and lower contact 6, in the oil pipe pipe string on stator top and the low side threaded corresponding length of difference, make to enter under test string Purpose depth of stratum in well；As shown in Fig. 5 (a) and Fig. 5 (b), described rotor 2 with can conduction transmission torque sucker rod, lead The quiet dynamic conversion attachment means of electricity and anti-sway deviation correcting device support the use and are assembled into working rotor pipe string；Specifically, this rotor work Make more piece first that pipe string is sequentially connected from top to bottom can conductive transmission torque sucker rod 7, full-bore hollow screw pump rotor 2, the Two can conductive transmission torque sucker rod 9, anti-sway deviation correcting device 10, conductive quiet dynamic conversion attachment means 11 and heater 12, above-mentioned Connect and be arranged at the conductive plug of each ends between each part by conductive cable or the mutual plug-in mounting of electrically conductive socket is formed Electrical connection, and by being arranged on the connection coupling threaded fixation successively of two part junctions.Wherein, conductive quiet dynamic conversion connects The concrete structure of connection device is disclosed in the patent of Application No. 2016107550567；The concrete structure of anti-sway deviation correcting device is public It is opened in the patent of Application No. 2016107531212；The concrete structure of conductive transmission torque sucker rod can be disclosed in application Number for 2016107531335 patent in；Can conductive transmission torque sucker rod be used for extending tool pipe string to suitable length；Heating Device is a heating rod with heating and function of temperature control.

Carry out conventional discharge opeing operation using said stator instrumentation tubes and working rotor pipe string, specifically comprise the following steps that

The stator instrumentation tubes series winding connecting is connect and under test string (dst-tcp, apr-pct) combination, enters pre- depthkeeping Degree；

School depth simultaneously adjusts test string, makes perforation rob be aligned and should penetrate layer position perforation；

One open-one close operation；

Two open two pass operations observes liquid level change in well；

If stratum is unable to blowing or fails to reach design requirement, under enter working rotor pipe string carry out lift discharge opeing；

When meeting viscous crude or heated because heat leakage leads to crude oil flow freely not enter heating system at present；

When run into as temperature is relatively low cause under pump crude oil flow smooth or because of pump setting depth limited by etc. situation when pump under liquid Flowing freely can not enter down pump heating system (semisubmersible drilling platform carries out the heating of below mud face)；

After the actual Produced Fluid Property in stratum and capability prop-erties are implemented in discharge opeing:

If a can meet seeks product operating condition, complete to ask for production capacity to work and obtain high pressure property sample according to job design And measuring pressure recover etc. work；

B, otherwise, rise rotor can carry out being acidified, the well stimulation such as the row's of note operation；

Completion plays out stator and terminates after terminating.

From above-mentioned construction procedure it is apparent that can achieve one time by using this full-bore air-core armature screw pump Test string is capable of multinomial test function, eliminates in traditional recovery process, when needing test, sampling pressure, then Need to propose screw pump mining completion tubular column, enter down the operation of screw pump mining completion tubular column thereafter again, energy after the completion of test Enough directly carry out more pump heating, discharge opeing exploitation, do not affect to switch well operations, safety is relatively reliable, while reducing cost, Save for 40% time with respect to tradition exploitation.

Claims

1. a kind of full-bore air-core armature screw pump is it is characterised in that include stator, rotor and orientation spool；Described stator, institute State rotor and described orientation spool is tube structure；Wherein:

The side wall wall thickness of described stator is 8～8.7mm, the internal diameter of external diameter and pit shaft is adapted；The inwall of described stator adds Work has the helical groove that width is 276～298mm；

Described rotor includes the metal cylinder being sleeved on inside described stator and the thick layer overlaying on described metal cylinder outer wall Spend the rubber bushing for 5～30mm；Being machined with described rotor outer wall can with the helical groove on described stator inner wall Realize the helical raised of coupling cooperation, and each circle helical groove and the formation annular space space between helical raised that cooperates Capacity is between 25～55ml；Wherein, the side wall wall thickness of the metal cylinder of described rotor be 20～22mm, internal diameter be 50～ 69mm；

Described orientation spool is arranged on described stator bottom, and the internal diameter of described orientation spool is less than the external diameter of described rotor, makes Described rotor is limited on the upper surface of described orientation spool and ensure that all testing tools pass through described rotor and institute simultaneously The inner chamber stating orientation spool is transferred to down-hole.

2. full-bore air-core armature screw pump according to claim 1 is it is characterised in that described two ends of rotor is respectively mounted Have between conductive plug and electrically conductive socket, and described conductive plug and described electrically conductive socket by being arranged on described rotor internal cavity Energising cable forms electrical connection.

3. full-bore air-core armature screw pump according to claim 2 is it is characterised in that described conductive plug includes conduction Plug includes the first copper rod and is arranged on thin copper bar on the first copper rod top surface；Described electrically conductive socket includes the second copper rod；From described Second copper rod bottom surface is caved inward and offers an axial socket being adapted with described thin copper bar size, from described thin copper bar top Offer an axial deep trouth that described thin copper bar top is divided into two lobes, in described axial deep trouth, be provided with a waveform spring Piece, after making described thin copper bar insert described axial socket, the two-flap type structure on described thin copper bar top acts in the elastic force of reed Under expand outwardly, remain contact condition with axial socket inwall；Outer wall in described first copper rod and described second copper rod On be covered with insulating barrier.

4. full-bore air-core armature screw pump according to claim 1 is it is characterised in that described stator top and bottom are divided It is not threaded with top connection and lower contact；Described top connection is used for being connected with drilling rod or tubing round thread；Described lower contact is used for It is connected with drilling rod or tubing round thread.

5. full-bore air-core armature screw pump according to claim 4 is it is characterised in that described lower contact is tied for cylinder Structure, its upper inside wall caves inward and is formed with ring-shaped step；Described orientation spool top is provided with and described ring-shaped step phase interworking The annular flange flange closed, makes described orientation spool be sleeved on inside described lower contact and is limited on described ring-shaped step；Described fixed At the pipe nipple annular flange flange of position, external diameter is more than described stator outer diameter, makes described lower contact suit and threaded is fixed on described stator Bottom makes orientation spool be fixed on described stator bottom simultaneously.