CN103147714B - Annulus safety device applied to electric submersible pump producing well - Google Patents
Annulus safety device applied to electric submersible pump producing well Download PDFInfo
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- CN103147714B CN103147714B CN201310070390.5A CN201310070390A CN103147714B CN 103147714 B CN103147714 B CN 103147714B CN 201310070390 A CN201310070390 A CN 201310070390A CN 103147714 B CN103147714 B CN 103147714B
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- metal seal
- annular space
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Abstract
The invention discloses an annulus safety device applied to an electric submersible pump producing well. The device comprises an inserting pipe sealing part, a hydraulic control part, a spring control part, a path control part and a self-balancing mechanism. Opening and closing of the annulus safety device can be remotely controlled by replacing a safety valve with a valve plate structure in a well, where other pipe columns are inserted into a production pipe column, and through control of a ground hydraulic system, so that the safety problems of an electric heating well and a same-well injection-extraction well are solved and the blowout accident is avoided. The annulus safety device has a pressure self-balancing function and solves the problem that the annulus safety device cannot be opened under overhigh downhole pressure caused when the well is closed for a long time.
Description
Technical field
The present invention relates to producing oil, gas, water, solubilized from well and maybe can melt the equipment of material or slurry of mineral, specifically, relate in electric submersible pumping flow string, for sealing the safety device inserting annular space between tubing string and flow string.
Background technology
When adopting electric submersible pumping, for security consideration, the flow string of some producing well is connected with safety valve, cable-passing packer and the vent valve with valve board structure, the open and close of safety valve and vent valve are controlled by the hydraulic pressure linked in the liquid controling pipe line on ground, wherein safety valve depth of setting is more shallow, at about 200m.When blowout appears in liquid generated underground, then need cut off pressure in liquid controling pipe line at ground level emergency, the valve plate of safety valve be closed, prevents blowout.
In electric motor drive oil pump system producing well, some oil well content of wax is high, and in flow string, easy wax deposition, causes production reduce or stop production, in addition in some heavy oil wells, because former oil viscosity is too high, exploit very difficult.In order to solve the problem, oil field usually can in oil pipe under enter to heat the laser heating cable of production fluid, because the safety valve that enters to make to have valve board structure under heating cable blocks because valve plate is inserted into tubing string and cannot cuts out, thus lost efficacy.
In the producing well of some application single-well injection-production techniques, in well, tubing string is made up of two-layer concentric tube column, skin is the oil pipe that external diameter is larger, internal layer is the oil pipe that external diameter is less, the annular space of large little oil pipe, as production oil recovery passage, usually enters to be divided into two steps under such bimetallic tube, enters outer tubing string under the first step, second step inserts internal layer tubing string, and the conventional security valve that the insertion due to internal layer tubing string makes outer tubing string connect lost efficacy because valve plate cannot be closed.
In addition, for the well needing the special process inserting other tubing string in some flow strings, conventional valve plate safety valve also can all lose efficacy because valve plate cannot be closed.
Summary of the invention
The present invention is to solve the technical problem that when needing in flow string to insert other tubing string, conventional security valve cannot use, provide a kind of for the annular space safety device in electric submersible pumping well, prevent gas blowout accident from occurring.
In order to solve the problems of the technologies described above, the present invention is achieved by following technical scheme:
For the annular space safety device in electric submersible pumping well, it is characterized in that, this device is made up of Inserting Tube hermetic unit, hydraulic control part, spring control section, access controlling portions and self-balancing mechanism;
Inserting Tube hermetic unit comprises upper end and is horn mouth and its wall is provided with the guide head that flow channels, lower end and guide cylinder be tightly connected, the lower end of described guide cylinder is connected with the body upper port inner sealing of described access controlling portions, described guide cylinder inwall is inlaid with a multiple O type circle, seals for being formed with Inserting Tube post;
Hydraulic control portion divides the top connection comprising and be provided with sealing endoporus, is provided with piston rod packing assembly 2, and is connected to hydraulic control system by liquid controling pipe line in described sealing endoporus; Described piston rod packing assembly 2 comprises the piston rod that outer cover has hermetically-sealed construction, and described piston rod upper end is provided with the piston rod nut spacing to described hermetically-sealed construction;
Described top connection upper end is for connecting the oil pipe on annular space safety device top, lower port outside seal is connected with the adapter sleeve being arranged at spring control section outside, described adapter sleeve lower end is sealedly attached to the urceolus of described access controlling portions, and described adapter sleeve inwall is provided with boss;
Described spring control section comprises central tube, the upper end of described central tube is fixedly connected with upper joint sleeve, described central tube outer cover has the power spring after compression, described power spring one end is resisted against described central tube and described upper joint sleeve inner face, the other end by split ring and radial spacing ring spacing, described radial spacing ring is resisted against the boss on described adapter sleeve inwall; Described central tube bottom offers anti-indent, and is connected with the body assembly key of described access controlling portions;
Described access controlling portions comprises described body assembly, and described body assembly is made up of urceolus and the body welding being provided with passageway bridge, has the gap that described central tube lower end can be made to insert between described body and described urceolus; Described body upper port outside is connected with described top connection lower port inner sealing, and inside center can form matched in clearance with Inserting Tube post; Described urceolus upper end is outside to be tightly connected with described adapter sleeve, and lower end outside seal is connected with lower contact;
Described lower contact inside is provided with curved metal seal, the circumferential projection arranged by its inwall is located described curved metal seal radial, described curved metal seal has curved end, this curved end forms the sealing of metal to metal with described body and described urceolus lower end respectively, and described curved metal seal has the overcurrent endoporus being greater than and inserting tubing string external diameter; Curved metal seal outside is provided with returning spring, and described returning spring is spacing by stop collar, and described stop collar limits the axial stroke of arc metal seal simultaneously, and described stop collar is provided with multiple flow channels;
Described self-balancing mechanism is flush-mounted in described body assembly, described body is sealedly connected with balance valve seat, described balance valve seat inner bottom is provided with can the locating piece of overcurrent, the little outer spring and little inner spring that connect together is provided with above described locating piece, be provided with steel ball above described little outer spring and little inner spring, the taper smooth surface of described steel ball and described balance valve seat forms the sealing of metal to metal.
The hermetically-sealed construction of described piston rod outside comprises the piston rod center ring being arranged on centre, be provided with piston rod V dish to described piston rod center ring bilateral symmetry, described piston rod V dish outer end is disposed with piston rod support ring and piston rod pressure cap, the convex structure of described piston rod pressure cap and the groove fit of described piston rod support ring.
The sealing contact position of described curved metal seal, described body and described urceolus is provided with nickel cobalt (alloy).
The annular groove that cross section is right angle is provided with between two metal sealing positions, place of described curved metal seal.
Described stop collar selects metal antiscale material.
The invention has the beneficial effects as follows:
(1) annular space safety device of the present invention can need to insert in flow string in the well of other tubing string the safety valve replacing having valve board structure.
Insert under tubing string just carries out after connection tubing string of the present invention enters well, first will through importing tubing string and carrying out interior sealing with it, simultaneously also will through the body assembly of production control passage and curved metal seal, inserting tubing string does not affect the opening and closing that the present invention produces passage.When the present invention is in opening, produces liquid and enter the passageway bridge in body by curved metal seal and flow in the oil pipe that connects above the present invention.
Therefore the present invention can prevent the safety valve owing to entering to make to have valve board structure under heating cable to lose efficacy because valve plate cannot be closed, the conventional security valve that also can prevent the insertion due to internal layer tubing string from outer tubing string is connected lost efficacy because valve plate cannot be closed, thus solve electrical heating well and single-well injection-production, and other needs the safety problem inserting the special well of other tubing string in flow string, prevents the generation of gas blowout accident.
(2) annular space safety device of the present invention has pressure self-balancing function, the central tube of specifically spring control section is provided with anti-indent, anti-indent makes self-balance structure be in closed condition when the present invention closes, the effect of opening self-balancing part is played when the present invention needs to open, the prerequisite arc lower metal seal opened at self-balance structure is more easily pressed off, thus open production passage, solve the reasons such as long-time closing well and cause down-hole pressure too high and make the problem that annular space safety device cannot be opened.
(3) annular space safety device of the present invention can divide control its opening and closing by hydraulic control portion by ground hydraulic system, thus achieves the Long-distance Control of annular space safety device.
Accompanying drawing explanation
Fig. 1 is the structural representation of annular space safety device provided by the present invention;
Fig. 2 is the A-A sectional drawing of Fig. 1;
Fig. 3 is the structural representation of piston rod packing assembly;
Fig. 4 (a) is the part drawing of piston rod pressure cap; B () is the part drawing of piston rod V dish; C () is the part drawing of piston rod center ring; D () is the part drawing of piston rod support ring;
Fig. 5 is the structural representation of spring control section;
Fig. 6 is the first sectional drawing of central tube;
Fig. 7 is the second sectional drawing of central tube;
Fig. 8 is the blahk structure schematic diagram after the welding of body assembly;
Fig. 9 is the structural representation of body;
Figure 10 is the B-B sectional drawing of Fig. 9;
Figure 11 is the C-C sectional drawing of Fig. 9;
Figure 12 is the D-D sectional drawing of Fig. 9;
Figure 13 is the end view of stop collar;
Figure 14 is the cross section view of stop collar;
Figure 15 is the partial enlarged drawing of self-balancing mechanism;
Figure 16 is the schematic diagram forming same pressing system above the outside of self-balancing mechanism and this annular space safety device;
Figure 17 is the schematic diagram forming same pressing system below the inside of self-balancing mechanism and this annular space safety device;
Figure 18 is the oil recovery process schematic diagram of annular space safety device provided by the present invention.
In figure: 1-top connection; 2-piston rod packing assembly; 201-piston rod nut; 202-piston rod pressure cap; 203-piston rod V dish; 204-piston rod center ring; 205-piston rod support ring; 206-piston rod; 3-the 2nd O RunddichtringO; 4-the 4th O RunddichtringO; 5-body assembly; 501-urceolus; 502-body; 503-passageway bridge; 504-weld bond; 505-nickel cobalt (alloy); 506-bond structure;
6-adapter sleeve; 7-main assemblage of spring; 701-upper joint sleeve; 702-power spring; 703-split ring; The radial spacing ring of 704-; 705-central tube; The anti-indent of 706-; 707-keyway; 8-the 3rd O RunddichtringO; 9-the 5th O RunddichtringO; 10-curved metal seal; 11-stop collar; 12-returning spring; 13-lower contact; 14-locating piece; The little outer spring of 15-; The little inner spring of 16-; 17-steel ball; 18-balances valve seat; 19-the 6th O RunddichtringO; 20-the one O RunddichtringO; 21-imports tubing string; 22-introducting interface; 23-inserts tubing string.
Detailed description of the invention
For summary of the invention of the present invention, feature and effect can be understood further, hereby exemplify following examples, and coordinate accompanying drawing to be described in detail as follows:
Present embodiment discloses a kind of for the annular space safety device in electric submersible pumping well, the form of passing through inserting tubing string 23 does not affect the opening and closing of producing oil circuit.As depicted in figs. 1 and 2, this annular space safety device forms primarily of Inserting Tube hermetic unit, hydraulic control part, spring control section, access controlling portions and self-balancing mechanism.
The effect of Inserting Tube hermetic unit imports and seals the insertion tubing string 23 imported, and forms primarily of guide head 22 and guide cylinder 21.
Guide head 22 upper end flare, lower end is connected by common angular thread with guide cylinder 21, and is furnished with sealing ring formation sealing.The tubaeform port of guide head 22 extends to this annular space oil pipe that safety device connects, and contacts with its inwall; The horn mouth wall of guide head 22 is provided with multiple flow channels that production liquid can be made to pass through.
Guide cylinder 21 lower end is connected by common angular thread with the body 502 port inside in body assembly 5, and is furnished with sealing ring formation sealing.Guide cylinder 21 inwall is provided with many group O type ring recess equably, is inlaid with an O type circle 20 in O type ring recess.Guide head 22 and guide cylinder 21, for being imported by insertion tubing string 23, are sealed by an O type circle 20 between guide cylinder 21 and insertion tubing string 23.One O type circle 20 should meet the requirement of high-temperature wearable, and conventional material is polytetrafluoroethylene (PTFE).
Insert under tubing string 23 needs to carry out after the upper and lower oil pipe connecting this annular space safety device enters well, insert tubing string 23 successively through importing tubing string 21, body assembly 5 and curved metal seal 10, and carry out interior sealing with importing tubing string 21, the opening and closing that passage produced by this annular space safety device should not be affected simultaneously.
The effect of hydraulic control part is the opening and closing being controlled annular space safety device by the hydraulic control system on ground, forms primarily of top connection 1 and piston rod packing assembly 2.
The upper end of top connection 1 is for connecting upper oil pipe, and lower end is provided with the external screw thread for being connected with adapter sleeve 6, and is provided with the 2nd O RunddichtringO 3 between top connection 1 and adapter sleeve 6.Piston rod packing assembly 2 is installed on the sealing endoporus of top connection 1, forms hermetically-sealed construction in the form of piston.The NPT screw thread of top connection 1 inside is connected with liquid controling pipe line, and (liquid controling pipe line has various ways and model, specifically do not draw in accompanying drawing), pressure in liquid controling pipe line is controlled by ground hydraulic control system, and ground hydraulic control system carries out suppressing operation to piston rod packing assembly 2 by liquid controling pipe line.
As shown in Figure 3 and Figure 4, piston rod packing assembly 2 is made up of piston rod nut 201, piston rod pressure cap 202, piston rod V dish 203, piston rod center ring 204, piston rod support ring 205 and piston rod 206.Wherein, piston rod pressure cap 202, piston rod V dish 203, piston rod center ring 204 and piston rod support ring 205 select polytetrafluoroethylmaterial material usually, be enclosed within piston rod 206 outside and form hermetically-sealed construction symmetrically, sealing is reliable, piston rod nut 201 is connected by fine thread with piston rod 206, carries out spacing to above-mentioned hermetically-sealed construction.Piston rod V dish 203 plays main sealing function, and its V-shape itself also can produce certain elastic deformation; Piston rod center ring 204 both sides have the v-depression matched with piston rod V dish 203, play a supporting role to piston rod V dish 203 in centre; The convex structure of piston rod pressure cap 202 and the groove fit of piston rod support ring 205, be arranged on outside piston rod V dish 203 in the lump, support and spacing is carried out from outside to piston rod V dish 203, piston rod support ring 205 is by the male-female with piston rod V dish 203 profile simultaneously, ensure the dimensionally stable of piston rod V dish 203, good seal.
Adapter sleeve 6 is arranged at the outside of spring control section, and upper end is threaded with top connection 1, and lower end is connected with the threaded upper ends of the urceolus 501 of body assembly 5, and is provided with the 3rd O RunddichtringO 8 between adapter sleeve 6 and urceolus 501.The inwall of adapter sleeve 6 bottom is provided with boss, and this boss is used for positioning the radial spacing ring 704 of main assemblage of spring 7.
As shown in Figure 5, spring control section is made up of main assemblage of spring 7, comprises upper joint sleeve 701, power spring 702, split ring 703, radial spacing ring 704, central tube 705.It is outside that central tube 705 is arranged on body 502, and its lower end is inserted in the gap between body 502 and urceolus 501.Central tube 705 upper end is provided with upper joint sleeve 701, and upper joint sleeve 701 is connected by common angular thread with central tube 705, and the outer face of upper joint sleeve 701 can contact with piston rod 206 end of piston rod packing assembly 2.Power spring 702 is by being inserted in outside central tube 705 after compression, and one end is resisted against central tube 705 and upper joint sleeve 701 inner face, and the other end is undertaken spacing by split ring 703.Radial spacing ring 704 is inserted in outside split ring 703, and is resisted against the boss on adapter sleeve 6 inwall, carries out radial direction spacing to split ring 703.Spring control section is the power subject of whole annular space safety device, and the initial pretightning force size of power spring 702 determines the minimum opening pressure value of annular space safety device.
As shown in Figure 6 and Figure 7, offer three bathtub constructions central tube 705 lower end radial equipartition, wherein two be oppositely arranged for keyway 707, for coordinating with the bond structure 506 on body 502, rotate to prevent central tube 705; Another is anti-indent 706, and steel ball 17 can not be depressed by central tube 705 in the reset state.Certainly, in order to process with easy to assembly, anti-indent 706 also can be set to two.
Access controlling portions forms primarily of body assembly 5, curved metal seal 10, stop collar 11, returning spring 12 and lower contact 13.
As shown in Figure 8, body assembly 5 comprises urceolus 501 and body 502, urceolus 501 and body 502 are welded into entirety by the soldering opening 504 of body 502 bottom, and have gap between the urceolus 501 after welding and body 502, this gap can make the lower end of central tube 705 insert.Body 502 is threaded connection in top connection 1 lower port inner, and is provided with the 4th O RunddichtringO 4 formation sealing, and its inside center is axially extending bore, and insertion tubing string 23 can be made from wherein passing through.Urceolus 501 upper end is threaded with adapter sleeve 6, and is furnished with the 3rd O RunddichtringO 8, and lower end is threaded with lower contact 13, and is furnished with the 5th O RunddichtringO 9.
By high-precision processing, make the lower surface of body 502 and urceolus 501 and curved metal seal 10 formed two place's metal to metals be sealed and matched, wherein the inner and outer ring metal sealing of curved metal seal 10 should process simultaneously.The seal face of body 502 and urceolus 501 lower end, curved metal seal 10 can be inlaid with the softer nickel cobalt (alloy) of quality 505, see Fig. 9, to make sealing effectiveness better.
As shown in Fig. 9 to Figure 12, body 502 is in axial direction provided with passageway bridge 503, passageway bridge 503 can when this annular space safety device be in opening, make production liquid enter this passageway bridge 503 by curved metal seal 10, then flow into oil pipe above this annular space safety device until well head.Body 502 outside is also provided with one group of bond structure 506 symmetrically, and this bond structure 506 is for coordinating with group keyway of on central tube 705 707.
It is inner that curved metal seal 10 is arranged on lower contact 13, and lower contact 13 inwall is provided with circumferential projection, plays the centralizing function to curved metal seal 10 radial location.Curved metal seal 10 has curved end, curved end can form metal sealing respectively with body 502 and urceolus 501, curved face processing between two metal sealing position, places has a cross section to be the annular groove at right angle, this annular groove is convenient to the end good contact making curved metal seal 10 and central tube 705, thus makes central tube 705 steadily can reliably promote curved metal seal 10.The curved end axial centre of curved metal seal 10 has the endoporus of 3-5mm larger than insertion tubing string external diameter, pass through smoothly to enable insertion tubing string, and the part except curved end has the overcurrent endoporus being greater than and inserting tubing string 23, hole wall forms comparatively wide arc gap with insertion tubing string 23, and its effect makes the smooth overcurrent of production liquid.
Returning spring 12 is outside by being inserted in curved metal seal 10 after compression, and its upper end is resisted against the inner side of curved metal seal 10 curved end, and lower end is undertaken spacing by stop collar 11.
It is outside that stop collar 11 is set in curved metal seal 10, its lower end abutment is at the circumferential projection place of lower contact 13, upper end has inside and outside two spacing end faces, faced by the positive stop end of inner side, returning spring 12 is spacing, the spacing end face in outside is after curved metal seal 10 is pushed open by center-pole 705, certain position-limiting action is played to curved metal seal 10, prevents returning spring 12 transition from compressing.
As shown in Figure 13 and Figure 14, stop collar 11 is provided with flow channels, flow channels aperture is less, generally within the scope of 1-3mm, can filter the fine sand produced and be mixed in liquid, thus play the effect of sand control filtration.Stop collar 11 selects metal antiscale material simultaneously, can carry out scale control treatments to the well liquid of process, thus ensures that metal to metal seal place of curved metal seal 10 and body assembly 5 can not deposit sand and occur dirty sample.
As shown in figure 15, self-balancing mechanism is inlaid on body assembly 5 as a module whole, specifically be installed on the position of the anti-indent 706 body 502 corresponding to central tube 705, anti-indent 706 section start of self-balancing mechanism and central tube 705 reserves the idle stroke being not less than 10mm.
Self-balancing mechanism is made up of locating piece 14, little outer spring 15, little inner spring 16, steel ball 17, the 6th O RunddichtringO 19 and balance valve seat 18.Balance valve seat 18 is connected by thin angular thread with body 502, and balance valve seat 18 outer wall is provided with O type ring recess, is embedded with the 6th O RunddichtringO 19 in O type ring recess.
Balance valve seat 18 has the endoporus that main body aperture is greater than steel ball 17 diameter, and endoporus the inner is provided with internal thread, and interior outer end of hole has the undergauge be included in by steel ball 17 in endoporus.Balance valve seat 18 top outer does not exceed body 502 outer wall, and inside top is taper smooth surface, and this taper smooth surface and steel ball 17 are processed to form metal sealing by high-precision.
Be provided with locating piece 14 bottom balance valve seat 18 endoporus, locating piece 14 is connected by fine thread with balance valve seat 18; Locating piece 14 center has the endoporus that can make production liquid overcurrent.
Little outer spring 15 is enclosed within that little inner spring 16 is outer to be loaded in the endoporus of balance valve seat 18 in the lump, is resisted against the end face of locating piece 14 bottom little outer spring 15 and little inner spring 16.Little outer spring 15 and little inner spring 16 are placed with steel ball 17 above, compress steel ball 17 by initial tension of spring, make steel ball 17 complete metal sealing with the taper slippery inner surface at balance valve seat 18 top.
As shown in Figure 16 and Figure 17, the outside (above accompanying drawing middle finger) of self-balancing mechanism is connected with the oil pipe be connected above of this annular space safety device, form same pressing system, the inside (below accompanying drawing middle finger) of self-balancing mechanism is connected with the oil pipe be connected below this annular space safety device, forms same pressing system.When annular space safety device is in cut out, and curved metal seal 10 times surface pressures higher time, first to be moved by center-pole 705, center-pole 705 inwall on its anti-indent 706 top is made first the steel ball 17 in balance portion to be pushed away the smooth conical surface of balance valve seat 18, produce liquid by entering into outside steel ball 17 inside steel ball 17, thus the oily overpressure making this annular space safety device connect above is by pressure communication in the oil pipe that is connected below with this annular space safety device, the two-way pressure of curved metal seal 10 tends to balance, be convenient to center-pole 705 continue move down.
As shown in figure 18, annular space safety device of the present invention, its course of work is as follows:
(1) oil circuit opening process:
This annular space safety device is connected with its top, bottom oil pipe, removes into producing well desired depth with oil pipe one, is entered for 23 times by insert continually tubing string and passes through this annular space safety device, and docking with supporting cable fixture.Apply hydraulic coupling by liquid controling pipe line to piston rod packing assembly 2 on the ground, when hydraulic coupling is greater than the pretightning force of power spring 702, power spring 702 will by continuation compression.
Because the pressure (pressure of the tubing string that this pressure is connected below with this annular space safety device belongs to same pressing system) under curved metal seal 10 may far above the pressure (pressure of the tubing string that this pressure is connected above with this annular space safety device belongs to same pressing system) on curved metal seal 10, now center-pole 705 is difficult to directly promote curved metal seal 10.In order to solve the problem, when the design of self-balancing system makes center-pole 705 move down, first push the steel ball 17 of self-balancing system open, curved metal seal 10 two-way pressure be balanced.
The hydraulic coupling applied with landing ground continues to increase, and the decrement of power spring 702 increases, and then curved metal seal 10 is pushed away body when curved metal seal 10 two-way pressure balances by center-pole 705, opens oil recovery path.Production liquid under curved metal seal 10 upwards enters the passageway bridge 503 of body assembly 5, is finally entered in the oil pipe above annular space safety device by passageway bridge 503.
(2) oil circuit closing process:
Cut off pressure in liquid controling pipe line on the ground, power spring 702 starts to reset, and promotes curved metal seal 10 and move up together with center-pole 705.Curved metal seal 10 resets and seals and produces passage under the effect of returning spring 702.
Although be described the preferred embodiments of the present invention by reference to the accompanying drawings above; but the present invention is not limited to above-mentioned detailed description of the invention; above-mentioned detailed description of the invention is only schematic; be not restrictive; those of ordinary skill in the art is under enlightenment of the present invention; do not departing under the ambit that present inventive concept and claim protect, can also make the concrete conversion of a lot of form, these all belong within protection scope of the present invention.
Claims (5)
1., for the annular space safety device in electric submersible pumping well, this device comprises hydraulic control part and spring control section;
Described hydraulic control portion divides the top connection comprising and be provided with sealing endoporus, is provided with piston rod packing assembly, and is connected to hydraulic control system by liquid controling pipe line in described sealing endoporus; Described piston rod packing assembly comprises the piston rod that outer cover has hermetically-sealed construction, and described piston rod upper end is provided with the piston rod nut spacing to described hermetically-sealed construction;
Described spring control section comprises central tube, the upper end of described central tube is fixedly connected with upper joint sleeve, described central tube outer cover has the power spring after compression, described power spring one end is resisted against described central tube and described upper joint sleeve inner face, the other end by split ring and radial spacing ring spacing, described radial spacing ring is resisted against the boss on described adapter sleeve inwall; Described central tube bottom offers anti-indent, and is connected with the body assembly key of described access controlling portions;
It is characterized in that, this device also comprises Inserting Tube hermetic unit, access controlling portions and self-balancing mechanism;
Described Inserting Tube hermetic unit comprises upper end and is horn mouth and its wall is provided with the guide head that flow channels, lower end and guide cylinder be tightly connected, the lower end of described guide cylinder is connected with the body upper port inner sealing of described access controlling portions, described guide cylinder inwall is inlaid with a multiple O type circle, seals for being formed with Inserting Tube post;
Described top connection upper end is for connecting the oil pipe on annular space safety device top, lower port outside seal is connected with the adapter sleeve being arranged at spring control section outside, described adapter sleeve lower end is sealedly attached to the urceolus of described access controlling portions, and described adapter sleeve inwall is provided with boss;
Described access controlling portions comprises described body assembly, and described body assembly is made up of urceolus and the body welding being provided with passageway bridge, has the gap that described central tube lower end can be made to insert between described body and described urceolus; Described body upper port outside is connected with described top connection lower port inner sealing, and inside center can form matched in clearance with Inserting Tube post; Described urceolus upper end is outside to be tightly connected with described adapter sleeve, and lower end outside seal is connected with lower contact;
Described lower contact inside is provided with curved metal seal, the circumferential projection arranged by its inwall is located described curved metal seal radial, described curved metal seal has curved end, this curved end forms the sealing of metal to metal with described body and described urceolus lower end respectively, and described curved metal seal has the overcurrent endoporus being greater than and inserting tubing string external diameter; Curved metal seal outside is provided with returning spring, and described returning spring is spacing by stop collar, and described stop collar limits the axial stroke of arc metal seal simultaneously, and described stop collar is provided with multiple flow channels;
Described self-balancing mechanism is flush-mounted in described body assembly, described body is sealedly connected with balance valve seat, described balance valve seat inner bottom is provided with can the locating piece of overcurrent, the little outer spring and little inner spring that connect together is provided with above described locating piece, be provided with steel ball above described little outer spring and little inner spring, the taper smooth surface of described steel ball and described balance valve seat forms the sealing of metal to metal.
2. according to claim 1 a kind of for the annular space safety device in electric submersible pumping well, it is characterized in that, the hermetically-sealed construction of described piston rod outside comprises the piston rod center ring being arranged on centre, be provided with piston rod V dish to described piston rod center ring bilateral symmetry, described piston rod V dish outer end is disposed with piston rod support ring and piston rod pressure cap, the convex structure of described piston rod pressure cap and the groove fit of described piston rod support ring.
3. according to claim 1ly a kind ofly to it is characterized in that for the annular space safety device in electric submersible pumping well, the sealing contact position of described curved metal seal, described body and described urceolus is provided with nickel cobalt (alloy).
4. according to claim 1ly a kind ofly to it is characterized in that for the annular space safety device in electric submersible pumping well, between two metal sealing positions, place of described curved metal seal, be provided with the annular groove that cross section is right angle.
5. according to claim 1ly a kind ofly to it is characterized in that for the annular space safety device in electric submersible pumping well, described stop collar selects metal antiscale material.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310070390.5A CN103147714B (en) | 2013-03-05 | 2013-03-05 | Annulus safety device applied to electric submersible pump producing well |
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| CN201310070390.5A CN103147714B (en) | 2013-03-05 | 2013-03-05 | Annulus safety device applied to electric submersible pump producing well |
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| CN103147714B true CN103147714B (en) | 2015-06-17 |
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| US20150095100A1 (en) * | 2013-09-30 | 2015-04-02 | Ge Oil & Gas Esp, Inc. | System and Method for Integrated Risk and Health Management of Electric Submersible Pumping Systems |
| CN104004648B (en) * | 2014-04-14 | 2015-09-09 | 浙江大学 | A kind of Deep-Sea Microorganisms pressurize transfer sampler |
| CN105804693B (en) * | 2015-12-16 | 2017-07-25 | 中国石油化工股份有限公司 | A kind of annulus safety valve |
| CN106596276A (en) * | 2016-11-21 | 2017-04-26 | 扬中市阀门厂有限公司 | Pressure testing tool for large-calibre welded valve |
| CN107013179A (en) * | 2017-06-13 | 2017-08-04 | 山东威德福高原人工举升装备有限公司 | One kind has underground blow-out preventing device and method in rod recovering system oil pipe |
| CN109083618A (en) * | 2018-08-01 | 2018-12-25 | 东营市福利德石油科技开发有限责任公司 | Deep-well binary channels safety valve |
| CN114320218B (en) * | 2020-09-30 | 2023-08-22 | 中国石油天然气股份有限公司 | Drilling-plug-free well cementation device |
| CN113357140B (en) * | 2021-03-01 | 2022-11-08 | 中海油能源发展股份有限公司 | Double-seal check valve of electric submersible pump and sealing method thereof |
| CN113047807B (en) * | 2021-04-13 | 2022-12-13 | 濮阳市元亨利通石油机械有限公司 | Bridge plug for oil field |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1170982A (en) * | 1981-03-16 | 1984-07-17 | Gary A. Kohn | Well valve |
| US4420043A (en) * | 1981-06-25 | 1983-12-13 | Baker International Corporation | Valving apparatus for selectively sealing an annulus defined between a work string and the bore of an element of a production string of a subterranean well |
| US4538685A (en) * | 1983-10-07 | 1985-09-03 | Camco, Incorporated | Locking annulus safety valve |
| US4495998A (en) * | 1984-03-12 | 1985-01-29 | Camco, Incorporated | Tubing pressure balanced well safety valve |
| CN2360592Y (en) * | 1998-12-16 | 2000-01-26 | 胜利石油管理局采油工艺研究院 | Underground safety control device |
| CN201687435U (en) * | 2010-04-21 | 2010-12-29 | 中国石油化工股份有限公司 | Annular relief valve |
| CN101839117B (en) * | 2010-04-21 | 2014-04-02 | 中国石油化工股份有限公司 | Annulus safety valve |
| CN102337864B (en) * | 2011-09-09 | 2014-03-12 | 中国海洋石油总公司 | Safety valve in pipe |
-
2013
- 2013-03-05 CN CN201310070390.5A patent/CN103147714B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN103147714A (en) | 2013-06-12 |
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