CN201802373U - Anti-sand burying single rubber cylinder underground throttleer capable of throwing-in and pulling - Google Patents
Anti-sand burying single rubber cylinder underground throttleer capable of throwing-in and pulling Download PDFInfo
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- CN201802373U CN201802373U CN2010205423616U CN201020542361U CN201802373U CN 201802373 U CN201802373 U CN 201802373U CN 2010205423616 U CN2010205423616 U CN 2010205423616U CN 201020542361 U CN201020542361 U CN 201020542361U CN 201802373 U CN201802373 U CN 201802373U
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Abstract
The utility model relates to an anti-sand burying single rubber cylinder underground throttleer capable of throwing-in and pulling, which is applied in an oil-gas well for gas production. The top end of an upper central tube is inserted into a central hole at the lower end of a throwing-in joint; a long hole of a pulling head is opposite to and communicated with the long hole of a core shaft; and the long hole is arranged on the wall of the upper central tube. An annular step is arranged on the outer wall of the pulling head, and an annular auxiliary anti-sand rubber ring is sheathed on the annular step of the pulling head. The lower end of the core shaft is connected with a lower cylinder body through an external thread. A conical body is sheathed on the outer wall of the lower cylinder body. A regulating nut is arranged on the outer wall of the lower cylinder body; a spring is sheathed on the outer wall of the lower cylinder body; a guide head is connected on the outer wall at the lower end of the lower cylinder body through a thread; a gas nozzle is arranged on the upper end surface of a lower central tube; and a screw is fixed in a screw hole of the conical body and passes through the long hole on the wall of the lower cylinder body, and the lower central tube and the conical body are connected together through the screw. The anti-sand burying single rubber cylinder underground throttleer capable of throwing-in and pulling has the benefits of having the functions of anti-sand burying and anti-sand clamping and being convenient for pulling; and the external spring can lead the throttleer to work stably and reliably.
Description
Technical field
The utility model relates to oil field gas production technical field, particularly controls the underground throttle device that gas production is produced in the natural gas well, but is that a kind of sand control buries the single packing element underground throttle device of pulling.
Background technology
At present, underground throttle device is applied in the natural gas well that carries out gas production control.Chinese patent publication number CN2471929Y provides a kind of " downhole choke valve and throttling valve fishing tool thereof ".Comprise packing element, seat envelope instrument, central tube, valve cover, fishing head, slips, baffle ring, ceramic valve, piston rod, spring, spring base, upper skeleton packing element, packing element sliding sleeve, lower skeleton packing element, lower piston, cone, sand control inner cover and sand control outer cover.Need special-purpose fishing tool to salvage.Can realize natural gas well step-down throttling gas production, reach pressure, the output of control output oil gas; Downhole choke valve fishing tool can be finished the task of salvaging, deblocking and release in the steel wire working range.Wherein adopted by three slips, " outside is that pawl shape, internal diameter are that the conical surface, middle part are inner conical surface " of three slips, " slips is buckled in respectively in three keyways on central tube top, and baffle ring is threaded with central tube top, and slips can slide up and down along the central tube keyway ".Chinese patent publication number CN201437717U provides a kind of " down-hole sand control restriction choke ".Mainly form by top connection, last seating nipple and following seating nipple.Following seating nipple middle part outer wall thread is connected with the filter sand assembly; The following seating nipple lower end sand setting assembly that is threaded, sand setting assembly are mainly by sand sediment pipe and stifled composition of the end.Filter sand assembly mount pad centre bore and following seating nipple bulkhead through-hole UNICOM are fixed with obstruction throttling assembly on mount pad.Solve gas well throttling valve and dragged for a problem of top sand setting, improved the pulling success rate." drilling technology " is assorted, the 31st volume, and the 4th phase, publication has " novel underground throttle device is developed and used ".Novel underground throttle device comprises give up head (input joint), body, fishing head, slips, center-pole, brambles tooth, cartridge and pusher head.The article main contents comprise the technical indicator and the structure of restriction choke, and the slips structure that those skilled in the art are used always describes with slips is stressed to be analyzed.
At present, the restriction choke of control gas production has a variety of, the structure difference.Existing restriction choke still exists because gas well shakes out, and can bury fishing head after the accumulation of shaking out, and causes restriction choke to salvage; In addition, the long poorly sealed deficiencies such as unfreezing difficulty that cause of underground throttle device central tube.Simultaneously, two packing element dropping in and taking off type underground throttle devices exist that impulse stroke is long, turn over the deficiency that influences fishing on the packing element.
Summary of the invention
The purpose of this utility model is: but provide a kind of sand control to bury the single packing element underground throttle device of pulling, produce for the natural gas well throttling of shaking out on a small quantity and design, being implemented in the natural gas well has that the restriction choke fishing head can not buried by sand under the situation of shaking out on a small quantity.When needs are salvaged, can use fishing tool easily restriction choke to be salvaged.
The technical solution adopted in the utility model is: but sand control buries the single packing element underground throttle device of pulling, mainly by throw in joint, throw in cut off, mandrel, upper center tube, fishing head, nut, auxiliary sand control cushion rubber, slips, cartridge, cone, valve, screw, lower shell, spring, adjusting nut, guide head and lower center tube form.The mandrel upper end is enclosed within on the outer wall of throwing in the joint lower end and has to throw in to cut off the mandrel upper end is fixed on input joint lower end.Screw thread is fixed with fishing head on the outer wall of mandrel.In the fishing head bottom and the ring-shaped step of protrusion is arranged on the mandrel outer wall, be evenly distributed with three grooves (draw-in groove) on the ring-shaped step, the upper end of three slips is in groove, and slips is suspended on the ring-shaped step; Mandrel lower end outer wall is taper, and slips cooperates with mandrel lower end conical outer wall, slips is opened and is fixed on the tube inner wall.It is characterized in that: insert in the centre bore of throwing in the joint lower end on the top of upper center tube; On the wall of fishing head, slotted hole is arranged, on the wall of mandrel, slotted hole is arranged, the slotted hole of fishing head and UNICOM relative with the slotted hole of mandrel; On the wall of upper center tube, slotted hole is arranged, after upper center tube upwards slides, the slotted hole of upper center tube and UNICOM relative with the slotted hole of mandrel.On the described fishing head wall on slotted hole, the mandrel wall on slotted hole and the upper center tube wall longitudinal section of slotted hole (strip hole) be to be rectangle in the middle of there is semi arch at two ends, rectangular long limit is parallel with center line.After central tube moves up, the slotted hole on the fishing head, the slotted hole on the mandrel and the energy of the slotted hole on upper center tube UNICOM, sand setting can enter in the upper center tube by slotted hole, is taken out of well head with natural gas that rises and quilt.The preparation method of slotted hole (strip hole) is: get out circular hole earlier on tube wall, mill out slotted hole (strip hole) with cylindrical milling cutter then; Or adopting circular peripheral-mill to mill out slotted hole (strip hole), circular peripheral-mill is parallel with the center line of pipe.The technician should understand the structure of slotted hole (strip hole) and can finish making.On the outer wall of fishing head ring-shaped step is arranged, the auxiliary sand control cushion rubber of annular is arranged on the ring-shaped step of fishing head, nut will assist the sand control cushion rubber to be fixed on the ring-shaped step of fishing head.Auxiliary sand control cushion rubber and tube inner wall sealing can stop that the sand of sinking continues to fall.
External screw thread is connected with lower shell in the mandrel lower end, and lower shell is a cylindrical shape, and lower shell upper end outer wall has step, and cartridge is enclosed within lower shell step top, and cartridge lower end inwall has taper seat, and the internal conical surface of cartridge is downward.
On the outer wall of lower shell, be with cone.Cone be the hollow cylinder bodily form, the upper end outer wall of cone has taper seat, when cone upwards slide and cone on outer conical surface insert the cartridge internal conical surface after, cartridge is expanded.There is external screw thread lower end at lower shell, on the lower shell outer wall adjusting nut is arranged; On the lower shell outer wall, be with spring, and the position of spring is in the middle of cone and adjusting nut; The guide head that on the outer wall of lower shell lower end, has been threaded, guide head lower end outer wall has taper seat, and guide head has centre bore;
Lower center tube passes the guide head centre bore, and the upper end of lower center tube is in lower shell; A valve is arranged in the upper surface of lower center tube, and valve is in the centre bore of upper center tube bottom, valve has centre bore for the cylinder bodily form, and valve centre bore, lower center tube centre bore and upper center tube centre bore are on same straight line;
Slotted hole (strip hole) is arranged on the doffing body wall; In cone screw hole is arranged, cannelure is arranged on lower center tube, in the screw cone screw hole and pass slotted hole on the doffing body wall, the inner end of screw links together lower center tube and cone by screw in the cannelure of lower center tube.When upper center tube, valve and lower center tube moved up, screw slided in the lower shell slotted hole and drives cone and moves up along the outer wall of lower shell, and the outer conical surface of cone upper end can be inserted in the internal conical surface of lower end of cartridge.
In order to seal, between valve upper surface and upper center tube, sealing ring is arranged.
In order to reduce the moment of torsion of spring, between top on the spring and cone, there is annular to unload torsion circle, unload torsion circle and can adopt plane bearing.In the outside of spring annular urceolus is arranged, annular urceolus and cone are structure as a whole.
Loosening in order to prevent adjusting nut, clamp nut is arranged on lower shell, clamp nut and adjusting nut are fixed on the lower shell external screw thread simultaneously.
In order to prevent that sand from entering the gap between mandrel and the upper center tube, the sand control sealing ring is arranged between mandrel and upper center tube, the sand control sealing ring is distributed in the two ends up and down of upper center tube slotted hole.
But the process that is lowered to, the course of work and salvaging process that summary the utility model sand control buries the single packing element underground throttle device of pulling help to understand the utility model.Consult Fig. 1 and Fig. 2.
1. be lowered to process: will throw in joint 1 and be connected and be lowered to the instrument lower end, and be lowered to the instrument upper end and connect steel wire, the steel wire other end is wrapped on the ground surface roller, is rotated by the ground installation index drum.At first, at the following fashionable well head blowout prevention box of opening, the utility model underground throttle device put into well head after, close well head blowout prevention box.Then, in well, slowly transfer underground throttle device, carry suddenly and put steel wire suddenly in being lowered to process, cutting under the mistake by the well head steel wire.After underground throttle device is run into desired depth, carry steel wire slowly, slips 10 outwards overhangs under the acting in conjunction of the gravity and the mandrel 3 lower end outer wall conical surfaces, the slip insert of slips 10 produces with tube inner wall and contacts, when upper lifting force reaches 2500～3000N, underground throttle device firmly fastening on tube inner wall; Slowly transfer steel wire, discharge bumper jar, produce upwards vibration power, guarantee underground throttle device fastening under the situation that bumper jar discharges, carry steel wire after on the oil pipe, rely on jarring force moment to cut off to throw in and cut off 2.Input cuts off 2 by after being cut off, and spring 17 discharges compression elasticities; Torsion circle 15, screw 14 and cone 12 are let out in promotion, drive on lower center tube 21, the valve 13 promotion upper center tubes 4 to move; And the upper end of cone 12 enters in the cartridge 11, and cartridge 11 realizes expanding under the effect of spring force and cone 12.Underground throttle device is thrown in, the work of seat envelope is finished.At last, trip out the input instrument.
2. the course of work: after wellhead assembly was opened operation, underground throttle device is ordinary production in the natural gas well.This underground throttle device is under the effect of valve 13 chock pressure differences, and cartridge 11 tops make cartridge 11 reexpand less than bottom pressure, realizes further sealing.This moment, slips 10 need bear because of the axial force as for mandrel 3 of coming due to the chock pressure difference.When operate as normal, auxiliary sand control cushion rubber 8 can prevent that sand from entering between the slips 10 of bottom and mandrel 3 conical surfaces and cause accumulation.Sand control sealing ring B1 can prevent that sand from entering the gap between upper center tube 4 and the mandrel 3, reduces the sand that occurs when restriction choke was salvaged in the later stage and buries and sand card phenomenon.What the utility model underground throttle device was the most outstanding is to prevent that sand from burying structure.Prevent that sand from burying structure and being: mandrel 3, upper center tube 4 and fishing head 5 walls are provided with clearance hole, are deposited on the sand on auxiliary sand control cushion rubber 8 tops, can enter at any time in the central tube 4, and sand and the natural gas that upwards flows are discharged well head together.Do not accumulate sand setting, fishing head 5 can not be buried by sand.
3. salvaging process: when needs are salvaged this underground throttle device, at first, be lowered to fishing tool, discharge bumper jar, compression upper center tube 4, spring 17, cone 12 is pushed back puts cartridge 11 retractions in place.This moment, fishing head 5 was not buried by sand, fishing tool is caught fishing head 5, jarring fishing head 5 makes progress, fishing head 5 drives slips 10 and slides in slips spacing ring 9, oil pipe loses gradually with 10 of slips and contacts, and moves into place up to fishing head 5, and underground throttle device loses the fastening effect, upwards propose package unit, finish fishing.
The beneficial effects of the utility model: but the utility model sand control buries the single packing element underground throttle device of pulling, 1, adopted and anti-ly buried the fishing head structure, realized preventing when the natural gas well shakes out on a small quantity that the sand accumulation from burying fishing head, make things convenient for salvage to carry out; 2, adopt the sand control sealing ring to prevent that sand from entering between central tube and the mandrel, prevented the excessive sand card that causes of resistance between central tube and the mandrel; 3, adopt the outer spring structure, increase the job stability of spring.But sand control buries the single packing element underground throttle device of pulling and is used for natural gas well underground work and carries out gas production and regulate, and can satisfy the natural gas well control of shaking out on a small quantity and produce needs, realizes the throttling step-down.
Description of drawings
But being sand control, Fig. 1 buries the single packing element underground throttle device of pulling the first half structural profile schematic diagram.
But being sand control, Fig. 2 buries the single packing element underground throttle device of pulling the first half structural profile schematic diagram.
Fig. 3 is the A-A sectional drawing of Fig. 1.The position relation of six slotted holes of six slotted holes, the mandrel 3 of expression fishing head 5 and six slotted holes of central tube 4.
Among the figure, 1. throw in joint, 2. input cuts off, 3. mandrel, 4. upper center tube, 5. fishing head, 6. nut, 7. pad, 8. auxiliary sand control cushion rubber, 9. slips spacing ring, 10. slips, 11. cartridge, 12. cone, 13. valves, 14. screws, 15. let out torsion circle, 16. lower shell, 17. springs, 18. adjusting nuts, 19. clamp nuts, 20. guide head, 21. lower center tubes, B1. sand control sealing ring, B2. end-face seal ring.
The specific embodiment
Embodiment 1: but bury the single packing element underground throttle device of pulling with a sand control is example, and the utility model is described in further detail.
Consult Fig. 1.But sand control buries the single packing element underground throttle device of pulling, and total length is 635.5mm.Mainly by throw in joint 1, throw in cut off 2, mandrel 3, upper center tube 4, fishing head 5, nut 6, auxiliary sand control cushion rubber 8, slips 10, cartridge 11, cone 12, valve 13, screw 14, lower shell 16, spring 17, adjusting nut 18, guide head 20 and lower center tube 21 form.Mandrel 3 upper ends are enclosed within on the outer wall of throwing in joint 1 lower end and have four inputs to cut off 2 and mandrel 3 upper ends are fixed on throw in joint 1 lower end.Screw thread is fixed with fishing head 5 on the outer wall of mandrel 3.In fishing head 5 bottoms and the ring-shaped step of a protrusion is arranged on mandrel 3 outer walls, be evenly distributed with three grooves (draw-in groove) on the ring-shaped step, the upper end of three slips 10 is in groove, and slips 10 is suspended on the ring-shaped step; The 9 restriction slips radial displacements of a slips spacing ring are arranged outside the slips 10.Mandrel 3 lower end outer walls are taper.
Insert in the centre bore of throwing in joint 1 lower end on the top of upper center tube 4; Six vertical slotted holes are arranged on the wall of fishing head 5, six vertical slotted holes are arranged on the wall of mandrel 3, consult Fig. 3.Relative and the UNICOM of the slotted hole of the slotted hole of fishing head 5 and mandrel 3.Consult Fig. 1.Six vertical slotted holes are arranged on the wall of upper center tube 4, after upper center tube 4 upwards slides, the relative also UNICOM of slotted hole of the slotted hole of upper center tube 4 and mandrel 3.On described fishing head 5 walls on slotted hole, mandrel 3 walls on slotted hole and upper center tube 4 walls longitudinal section of slotted hole (strip hole) be to be rectangle in the middle of there is semi arch at two ends, rectangular long limit is parallel with center line.Sand control sealing ring B1 is arranged between mandrel 3 and upper center tube 4, and sand control sealing ring B1 is distributed in the two ends up and down of upper center tube 4 slotted holes; The upper end of central tube 4 slotted holes has sand control sealing ring B1 one; There is twice sand control sealing ring B1 the lower end of central tube 4 slotted holes.The spline fitted that spline and upper center tube 4 are arranged in mandrel 3 lower inside.The ring-shaped step that a protrusion is arranged on the outer wall of fishing head 5 has an annular to assist sand control cushion rubber 8 on the ring-shaped step of fishing head 5, and nut 6 will assist sand control cushion rubber 8 to be fixed on the ring-shaped step of fishing head 5.Between nut 6 and auxiliary sand control cushion rubber 8, a pad 7 is arranged.
Consult Fig. 2.Be connected with lower shell 16 at mandrel 3 lower end external screw threads, lower shell 16 is a cylindrical shape, and lower shell 16 upper end outer walls have a step, and cartridge 11 is enclosed within lower shell 16 step tops, cartridge 11 lower end inwalls have taper seat, and the internal conical surface of cartridge 11 is downward.
On the outer wall of lower shell 16, be with cone 12.Cone 12 be the hollow cylinder bodily form, the upper end outer wall of cone 12 has taper seat.There is external screw thread lower end at lower shell 16, and an adjusting nut 18 is arranged on lower shell 16 outer walls; A clamp nut 19 is arranged on lower shell 16, and clamp nut 19 is fixed on lower shell 16 external screw threads simultaneously with adjusting nut 18.On lower shell 16 outer walls, be with a compression spring 17, and the position of spring 17 is middle with adjusting nut 18 in cone 12; Between top on the spring 17 and cone 12, there is annular to unload torsion circle 15, unloads torsion circle 15 and adopt plane bearing.In the outside of spring 17 annular urceolus is arranged, annular urceolus and cone 12 are structure as a whole.The guide head 20 that on lower shell 16 lower end outer walls, has been threaded, guide head 20 lower end outer walls have taper seat, and guide head 20 has centre bore;
Six vertical slotted holes (strip hole) are arranged on lower shell 16 walls; In cone 12 six screw holes are arranged, a cannelure is arranged on lower center tube 21, six screws 14 are respectively fixedly in cone 12 screw holes and pass slotted hole on lower shell 16 walls, the inner end of six screws 14 links together lower center tube 21 and cone 12 by six screws 14 in the cannelure of lower center tube 21.
Claims (6)
1. but a sand control buries the single packing element underground throttle device of pulling, mainly cuts off (2), mandrel (3), upper center tube (4), fishing head (5), nut (6), auxiliary sand control cushion rubber (8), slips (10), cartridge (11), cone (12), valve (13), screw (14), lower shell (16), spring (17), adjusting nut (18), guide head (20) and lower center tube (21) by input joint (1), input and forms; Mandrel (3) upper end is enclosed within on the outer wall of throwing in joint (1) lower end and has input to cut off (2) mandrel (3) upper end is fixed on input joint (1) lower end, screw thread is fixed with fishing head (5) on the outer wall of mandrel (3), in fishing head (5) bottom and the ring-shaped step of protrusion arranged on mandrel (3) outer wall, be evenly distributed with three grooves on the ring-shaped step, the upper end of three slips (10) is in groove, and slips (10) is suspended on the ring-shaped step; Mandrel (3) lower end outer wall is taper; It is characterized in that: insert in the centre bore of throwing in joint (1) lower end on the top of upper center tube (4); On the wall of fishing head (5), slotted hole is arranged, on the wall of mandrel (3), slotted hole is arranged, the relative and UNICOM of the slotted hole of the slotted hole of fishing head (5) and mandrel (3); On the wall of upper center tube (4), slotted hole is arranged, after upper center tube (4) upwards slides, relative and the UNICOM of the slotted hole of the slotted hole of upper center tube (4) and mandrel (3), on the outer wall of fishing head (5), ring-shaped step is arranged, the auxiliary sand control cushion rubber (8) of annular is arranged on the ring-shaped step of fishing head (5), and nut (6) will assist sand control cushion rubber (8) to be fixed on the ring-shaped step of fishing head (5);
External screw thread is connected with lower shell (16) in mandrel (3) lower end, lower shell (16) is a cylindrical shape, lower shell (16) upper end outer wall has step, cartridge (11) is enclosed within lower shell (16) step top, cartridge (11) lower end inwall has taper seat, and the internal conical surface of cartridge (11) is downward;
On the outer wall of lower shell (16), be with cone (12), cone (12) be the hollow cylinder bodily form, the upper end outer wall of cone (12) has taper seat, in the lower end of lower shell (16) external screw thread is arranged, and on lower shell (16) outer wall adjusting nut (18) is arranged; On lower shell (16) outer wall, be with spring (17), and the position of spring (17) is middle at cone (12) and adjusting nut (18); The guide head (20) that on the outer wall of lower shell (16) lower end, has been threaded, guide head (20) lower end outer wall has taper seat, and guide head (20) has centre bore;
Lower center tube (21) passes guide head (20) centre bore, and the upper end of lower center tube (21) is in lower shell (16); In the upper surface of lower center tube (21) valve (13) is arranged, and valve (13) is in the centre bore of upper center tube (4) bottom, valve (13) has centre bore for the cylinder bodily form, and valve (13) centre bore, lower center tube (21) centre bore and upper center tube (4) centre bore are on same straight line;
On lower shell (16) wall, slotted hole is arranged; In cone (12) screw hole is arranged, on lower center tube (21), cannelure is arranged, screw (14) is fixedly in cone (12) screw hole and pass slotted hole on lower shell (16) wall, the inner end of screw (14) links together lower center tube (21) and cone (12) by screw (14) in the cannelure of lower center tube (21).
2. but sand control according to claim 1 buries the single packing element underground throttle device of pulling, it is characterized in that between valve (13) upper surface and upper center tube (4) sealing ring (B2) being arranged.
3. but sand control according to claim 1 buries the single packing element underground throttle device of pulling, it is characterized in that: going up between top and the cone (12) at spring (17) has annular to unload torsion circle (15), there is annular urceolus outside at spring (17), and annular urceolus and cone (12) are structure as a whole.
4. but sand control according to claim 3 buries the single packing element underground throttle device of pulling, it is characterized in that: unload torsion circle (15) and adopt plane bearing.
5. but bury the single packing element underground throttle device of pulling according to claim 1,2,3 or 4 described sand controls, it is characterized in that: clamp nut (19) is arranged on lower shell (16), and clamp nut (19) is fixed on lower shell (16) external screw thread simultaneously with adjusting nut (18).
6. but bury the single packing element underground throttle device of pulling according to claim 1,2,3 or 4 described sand controls, it is characterized in that: between mandrel (3) and upper center tube (4) sand control sealing ring (B1) is arranged, sand control sealing ring (B1) is distributed in the two ends up and down of upper center tube (4) slotted hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205423616U CN201802373U (en) | 2010-09-21 | 2010-09-21 | Anti-sand burying single rubber cylinder underground throttleer capable of throwing-in and pulling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205423616U CN201802373U (en) | 2010-09-21 | 2010-09-21 | Anti-sand burying single rubber cylinder underground throttleer capable of throwing-in and pulling |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201802373U true CN201802373U (en) | 2011-04-20 |
Family
ID=43871878
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205423616U Expired - Lifetime CN201802373U (en) | 2010-09-21 | 2010-09-21 | Anti-sand burying single rubber cylinder underground throttleer capable of throwing-in and pulling |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201802373U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101967966A (en) * | 2010-09-21 | 2011-02-09 | 中国石油天然气股份有限公司 | Anti-sand burying salvaging single-rubber barrel downhole choke |
| CN105840154A (en) * | 2016-04-19 | 2016-08-10 | 陕西汇丰悦石油科技开发有限公司 | Novel slip-type downhole throttler |
-
2010
- 2010-09-21 CN CN2010205423616U patent/CN201802373U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101967966A (en) * | 2010-09-21 | 2011-02-09 | 中国石油天然气股份有限公司 | Anti-sand burying salvaging single-rubber barrel downhole choke |
| CN101967966B (en) * | 2010-09-21 | 2013-02-13 | 中国石油天然气股份有限公司 | Anti-sand burying salvaging single-rubber barrel downhole choke |
| CN105840154A (en) * | 2016-04-19 | 2016-08-10 | 陕西汇丰悦石油科技开发有限公司 | Novel slip-type downhole throttler |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20110420 Effective date of abandoning: 20130306 |
|
| RGAV | Abandon patent right to avoid regrant |