CN201627572U - Downhole choke - Google Patents
Downhole choke Download PDFInfo
- Publication number
- CN201627572U CN201627572U CN2010201195470U CN201020119547U CN201627572U CN 201627572 U CN201627572 U CN 201627572U CN 2010201195470 U CN2010201195470 U CN 2010201195470U CN 201020119547 U CN201020119547 U CN 201020119547U CN 201627572 U CN201627572 U CN 201627572U
- Authority
- CN
- China
- Prior art keywords
- pawl spring
- throttle device
- spring
- locking bar
- underground throttle
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Abstract
The utility model relates to a downhole chock, in particular to a special downhole chock applied to oilfield natural gas wells. A lower end surface base of a cylindrical guide joint with a center hole is arranged on a limiting step of an outer working barrel of the downhole chock. A cylindrical sealing short piece with a center hole is in threaded connection into the upper end of the guide joint. A throttling air nozzle is fixed at the upper end of the center hole of the sealing short piece. A pawl of a positioning pawl spring is flush with an opening groove of positioning pawl spring outer barrel. The positioning pawl spring outer barrel is sleeved on the outer wall of the positioning pawl spring, the upper end of the positioning pawl spring outer barrel is fixed with a lock rod through a lock rod catch assembly, and a lower end surface of the positioning pawl spring is pressed on the upper portion of a valving fixed joint. The downhole chock has the advantages that the downhole chock can be thrown accurately and reliably, simultaneously saves fishing time and reduces fishing cost without being jammed similar as a conventional downhole chock which is fished.
Description
Technical field
The utility model relates to oil field natural gas extraction technical field, and the underground throttle device that particularly a kind of natural gas well adopts is the special-purpose restriction choke in a kind of down-hole.
Background technology
In the recovery process of the natural gas well, more and more adopt the underground throttle device technology to prevent the generation of pit shaft hydrate in the gas well gas production process, through updating of on-the-spot application and technician, the underground throttle device technology is constantly improved.
At present, the input operation sequence of underground throttle device is: at first underground throttle device is connected with downhole tools such as weighted lever, bumper jars, then tool string is put into the well head lubricator, lubricator is installed on the well head, because lubricator is longer, need carry out the installation of lubricator with well testing truck.After lubricator installs, open head valve, with the test steel wire underground throttle device and tool string are lowered in the oil pipe, after arriving projected depth, suddenly stop, the resilience rapidly under the flexible effect of steel wire of underground throttle device this moment is under the effect of inertia force, the underground throttle device slips opens, underground throttle device tentatively is anchored on the tube inner wall,, makes bumper jar upwards produce a vibration power then with carrying steel wire on the well testing truck, under the effect of this jarring force, cut off the pin on the underground throttle device, after pin was cut off, underground throttle device was thrown off with the test steel wire, meanwhile, under the effect of underground throttle device contained spring, make the sealing cup spreading on the underground throttle device, steel wire is tripped out well head, lay down the lubricator on the well head, like this, just finished the input of underground throttle device.
The salvaging operation sequence of underground throttle device is: fishing tool is connected on the test steel wire of well testing truck, lubricator is installed, then in the lubricator with fishing tool string G.I.H, when arriving the position of underground throttle device, clash into underground throttle device at first downwards, the underground throttle device slips is unclamped, in the bump underground throttle device, finish docking of fisher and underground throttle device, carrying steel wire then on the well testing truck will mention on the underground throttle device in the lubricator, close tubing valve, lay down lubricator, finish the salvage of underground throttle device.
From top pulling process as can be seen, the pulling need of work wire rope G.I.H of underground throttle device, not only used vehicle is many, needs personnel many, the operation sequence complexity, and also duty cycle is long, and pulling expense height can not satisfy the low-cost needs of exploiting.
The utility model content
The purpose of this utility model is: a kind of underground throttle device is provided, can utilizes gas well output gas to open the underground throttle device that leather cup gives rise to ground, realize the salvaging of underground throttle device.Overcome the operation sequence complexity that present movable underground throttle device exists in the pulling process, and duty cycle is long, the deficiency that the pulling expense is high.
The technical solution adopted in the utility model is: a kind of underground throttle device, mainly form by underground throttle device outer working tube, guide sub, packoff nipple, O RunddichtringO, throttling valve, valve pressure cap, distinguish anchor tip, locking bar, location pawl spring, location pawl spring urceolus, oil connection, locking bar lock assembly, fishing head.There is the external screw thread of the oil pipe of connection the lower end of underground throttle device outer working tube, can be connected with oil pipe; There is the external screw thread of the oil pipe of connection the upper end of underground throttle device outer working tube, can be connected with oil connection, and the oil connection upper end connects oil pipe, and the underground throttle device outer working tube is gone in the well.In the inwall lower end of underground throttle device outer working tube a limited step is arranged, the lower surface seat of cylindrical guide sub that has centre bore is on the limited step of underground throttle device outer working tube.Be connected with the cylindrical seal pipe nipple of being with centre bore at the upper end of guide sub internal thread, the O RunddichtringO is arranged on the outer wall of packoff nipple, make the outer wall of packoff nipple and the inner wall sealing of underground throttle device outer working tube.Be fixed with the throttling valve in packoff nipple centre bore upper end, the throttling valve is the cylinder that centre bore is arranged, and plays natural gas effect under the catchpit.The valve pressure cap is threaded with packoff nipple, and the lower surface of cylinder bodily form valve pressure cap is pressed on the upper surface of throttling valve.The valve pressure cap has centre bore.There is outer step valve pressure cap upper end, is pressed with the cylindrical locking bar of band centre bore outside valve pressure cap top on the step, and the screw top of locking bar is connected with fishing head.On the fishing head outer wall, be with the location pawl spring, and location pawl spring spring pawl aligns with the fluting place of location pawl spring urceolus.The location pawl spring has the radially equal angles distribution of three pawl springs, three pawl spring lower end oriented outer lug spring pawls, and the carrying inclined-plane is arranged at protruding spring pawl top, and guiding surface is arranged at protruding spring pawl bottom; Projection spring pawl can embed in the cannelure on the underground throttle device outer working tube inwall.Distinguish anchor tip lower end is threaded with packoff nipple, and the lower surface of location pawl spring is pressed in annular distinguish anchor tip top, and the lower surface of distinguish anchor tip is pressed on the outer step of throttling valve.On the outer wall of location pawl spring, be with location pawl spring urceolus; Fixedly locking bar of locking bar lock assembly is passed through in the upper end of location pawl spring urceolus.Locking bar can slide up and down in the pawl spring of location.The locking bar lock assembly is made up of steel ball, spring and plug wire, and the locking bar lock assembly is in the radial hole of pawl spring urceolus upper end, location, and steel ball slips in the cannelure on the locking bar outer wall.Cannelure on the locking bar outer wall has two, and following cannelure is used for preventing that locking bar glides automatically in the restriction choke distributing procedure, and top cannelure is used for preventing that the frictional force between the natural gas flow and locking bar makes the locking bar release in the normal productive process.The lower surface of location pawl spring urceolus is pressed in distinguish anchor tip top.
The operating principle of underground throttle device is: when descending the gas production tubing string, at first with the underground throttle device outer working tube, be connected on the oil pipe by oil connection, then the underground throttle device outer working tube arrived projected depth down with oil pipe, sit well head, close tubing valve.Underground throttle device is installed in the seizure throw in catcher, the seizure throw in catcher that underground throttle device will be housed then is installed on the well head, open tubing valve, the throw in catcher handle is caught in dextrorotation, underground throttle device is dropped in the well, when entering the oil pipe mouth, location pawl spring on the underground throttle device shrinks, descending under the effect of underground throttle device self gravitation, when arriving underground throttle device outer working tube position, the location pawl spring enters in the interior cannelure of underground throttle device outer working tube, and locate pawl spring and enter in the cannelure under the elastic reaction of self this moment, in the location open while of pawl spring, locking bar also enters lock-out state under the effect of descending impact force, the lock pawl of location pawl spring can not be shunk, with underground throttle device being locked in the overcoat cannelure tightly, both finished the input of underground throttle device this moment, and opened tubing valve and get final product ordinary production.Detailed elaboration has been done in the salvaging of underground throttle device in the operating principle of fisher, here repeat no more.
The beneficial effects of the utility model: the utility model underground throttle device, when not reducing the underground throttle device result of use, make the execute-in-place of underground throttle device convenient more, compare with use well testing truck pulling underground throttle device technology, it is simple to have pulling technology, and the advantage that execute-in-place is easy can not only be thrown in underground throttle device accurately and reliably, save the pulling time simultaneously, reduced the pulling expense.
Instrument of the present invention is simple, and is rational in infrastructure, and pulling is reliable, low to operating personnel's technical requirements, and the safe coefficient height can not occur being blocked phenomenon when conventional underground throttle device is salvaged.
Description of drawings
Fig. 1 is the utility model underground throttle device structural profile schematic diagram.
Among the figure, 17. underground throttle device outer working tubes, 18. guide subs, 19. packoff nipples, 20.0 RunddichtringOs, 21. the throttling valve, 22. valve pressure caps, 21. distinguish anchor tips, 24. locking bars, 25. location pawl springs, 26. location pawl spring urceolus, 27. oil connections, 28. locking bar lock assemblies, 29. fishing heads.
The specific embodiment
Embodiment 1: with a underground throttle device is example, and the utility model is further described.
Consult Fig. 1.The utility model underground throttle device mainly is made up of underground throttle device outer working tube 17, guide sub 18, packoff nipple 19, O RunddichtringO 20, throttling valve 21, valve pressure cap 22, distinguish anchor tip 23, locking bar 24, location pawl spring 25, location pawl spring urceolus 26, oil connection 27, locking bar lock assembly 28, fishing head 29.There is the 2-9/16 of the oil pipe of connection the lower end of underground throttle device outer working tube 17, and " external screw thread can be connected with oil pipe; There is the 2-9/16 of the oil pipe of connection the upper end of underground throttle device outer working tube 17, and " external screw thread is connected with oil connection 27, and oil connection 27 upper ends connect oil pipe, can and be fixed in the well underground throttle device outer working tube 17 G.I.Hs.The limited step that a protrusion is arranged in the inwall lower end of underground throttle device outer working tube 17, the lower surface seat of cylindrical guide sub 18 that has centre bore is on the limited step of underground throttle device outer working tube 17.Being connected with a band diameter at the upper end of guide sub 18 internal thread is the cylindrical seal pipe nipple 19 of 6 millimeters centre bores, twice O RunddichtringO 20 is arranged on the outer wall of packoff nipple 19, make the outer wall of packoff nipple 19 and the inner wall sealing of underground throttle device outer working tube 17.
Be fixed with a throttling valve 21 in packoff nipple 19 centre bores upper end, throttling valve 21 is cylinders that centre bore is arranged, and center-hole diameter is 2.2 millimeters, plays natural gas effect under the catchpit.Valve pressure cap 22 is threaded with packoff nipple 19, and the lower surface of cylinder bodily form valve pressure cap 22 is pressed on the upper surface of throttling valve 21.Valve pressure cap 22 has 6 millimeters centre bores.There is outer step valve pressure cap 22 upper ends, are pressed with the cylindrical locking bar 24 of band centre bore outside valve pressure cap 22 tops on the step, and the screw top of locking bar 24 is connected with fishing head 29.On fishing head 29 outer walls, be with a location pawl spring 25, and location pawl spring 25 spring pawls align with the fluting place of location pawl spring urceolus 26.Location pawl spring 25 have three pawl springs radially equal angles distribute, three pawl spring lower end oriented outer lug spring pawls, protruding spring pawl top is gradient to be 45 ° carrying inclined-plane, protruding spring pawl bottom is gradient to be 13 ° guiding surface; Projection spring pawl can embed in the cannelure on underground throttle device outer working tube 17 inwalls.Distinguish anchor tip 23 lower ends are threaded with packoff nipple 19, and the lower surface of location pawl spring 25 is pressed in annular distinguish anchor tip 23 tops, and the lower surface of distinguish anchor tip 23 is pressed on the throttling valve 21 outer steps.On the outer wall of location pawl spring 25, be with location pawl spring urceolus 26; Fixedly locking bar 24 of three equally distributed locking bar lock assemblies 28 is passed through in the upper end of location pawl spring urceolus 26.Locking bar 24 can slide up and down in the pawl spring 25 of location.Locking bar lock assembly 28 is made up of steel ball, spring and plug wire, and locking bar lock assembly 28 is in the radial hole of pawl spring urceolus 26 upper ends, location, and steel ball slips in the cannelure on locking bar 24 outer walls.Cannelure on locking bar 24 outer walls has two, and following cannelure is used for preventing that locking bar glides automatically in the restriction choke distributing procedure, and top cannelure is used for preventing that the frictional force between the natural gas flow and locking bar makes the locking bar release in the normal productive process.The lower surface of location pawl spring urceolus 26 is pressed in distinguish anchor tip 23 tops.
Claims (1)
1. a underground throttle device mainly is made up of underground throttle device outer working tube (17), guide sub (18), packoff nipple (19), O RunddichtringO (20), throttling valve (21), valve pressure cap (22), distinguish anchor tip (23), locking bar (24), location pawl spring (25), location pawl spring urceolus (26), oil connection (27), locking bar lock assembly (28), fishing head (29); It is characterized in that: there is the external screw thread of the oil pipe of connection the lower end of underground throttle device outer working tube (17); The upper end of underground throttle device outer working tube (17) have connection oil pipe external screw thread and be connected with oil connection (27), in the inwall lower end of underground throttle device outer working tube (17) limited step is arranged, the lower surface seat of cylindrical guide sub (18) that has centre bore is on the limited step of underground throttle device outer working tube (17), be connected with the cylindrical seal pipe nipple (19) of band centre bore at the upper end internal thread of guide sub (18), O RunddichtringO (20) is arranged on the outer wall of packoff nipple (19), make the outer wall of packoff nipple (19) and the inner wall sealing of underground throttle device outer working tube (17), be fixed with throttling valve (21) in packoff nipple (19) centre bore upper end, throttling valve (21) is the cylinder that centre bore is arranged, valve pressure cap (22) is threaded with packoff nipple (19), the lower surface of cylinder bodily form valve pressure cap (22) is pressed on the upper surface of throttling valve (21), valve pressure cap (22) has centre bore, there is outer step valve pressure cap (22) upper end, outside valve pressure cap (22) top, be pressed with the cylindrical locking bar (24) of band centre bore on the step, the screw top of locking bar (24) is connected with fishing head (29), on fishing head (29) outer wall, be with location pawl spring (25), and location pawl spring (25) spring pawl aligns with the fluting place of location pawl spring urceolus (26), location pawl spring (25) has the radially equal angles distribution of three pawl springs, three pawl spring lower end oriented outer lug spring pawls, the carrying inclined-plane is arranged at projection spring pawl top, and guiding surface is arranged at protruding spring pawl bottom; Projection spring pawl can embed in the cannelure on underground throttle device outer working tube (17) inwall, distinguish anchor tip (23) lower end is threaded with packoff nipple (19), the lower surface of location pawl spring (25) is pressed in annular distinguish anchor tip (23) top, the lower surface of distinguish anchor tip (23) is pressed on the outer step of throttling valve (21), is with location pawl spring urceolus (26) on the outer wall of location pawl spring (25); Fixedly locking bar (24) of locking bar lock assembly (28) is passed through in the upper end of location pawl spring urceolus (26), locking bar (24) can slide up and down in location pawl spring (25), locking bar lock assembly (28) is made up of steel ball, spring and plug wire, locking bar lock assembly (28) is in the radial hole of location pawl spring urceolus (26) upper end, steel ball slips in the cannelure on locking bar (24) outer wall, cannelure on locking bar (24) outer wall has two, and the lower surface of location pawl spring urceolus (26) is pressed in distinguish anchor tip (23) top.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201195470U CN201627572U (en) | 2010-02-25 | 2010-02-25 | Downhole choke |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201195470U CN201627572U (en) | 2010-02-25 | 2010-02-25 | Downhole choke |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201627572U true CN201627572U (en) | 2010-11-10 |
Family
ID=43058966
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201195470U Expired - Lifetime CN201627572U (en) | 2010-02-25 | 2010-02-25 | Downhole choke |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201627572U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102383767A (en) * | 2011-10-10 | 2012-03-21 | 西南石油大学 | Mountable backing and sand prevention throttle used under well |
| CN103541698A (en) * | 2012-07-12 | 2014-01-29 | 中国石油天然气股份有限公司 | Gas well underground fixed yield throttling production device |
| CN103541697A (en) * | 2012-07-12 | 2014-01-29 | 中国石油天然气股份有限公司 | Anti-slide single-rubber-barrel downhole throttling device |
| CN105221095A (en) * | 2015-11-03 | 2016-01-06 | 江苏省金峰石油机械制造有限公司 | Gas well blocking device |
| CN109339751A (en) * | 2018-10-19 | 2019-02-15 | 中国石油天然气股份有限公司 | It is a kind of easily to bore formula composite throttling device and application method |
-
2010
- 2010-02-25 CN CN2010201195470U patent/CN201627572U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102383767A (en) * | 2011-10-10 | 2012-03-21 | 西南石油大学 | Mountable backing and sand prevention throttle used under well |
| CN103541698A (en) * | 2012-07-12 | 2014-01-29 | 中国石油天然气股份有限公司 | Gas well underground fixed yield throttling production device |
| CN103541697A (en) * | 2012-07-12 | 2014-01-29 | 中国石油天然气股份有限公司 | Anti-slide single-rubber-barrel downhole throttling device |
| CN103541697B (en) * | 2012-07-12 | 2016-01-20 | 中国石油天然气股份有限公司 | Anti-fall single packing element downhole choke device |
| CN103541698B (en) * | 2012-07-12 | 2016-01-20 | 中国石油天然气股份有限公司 | Gas well down-hole fixed output quota amount throttling process units |
| CN105221095A (en) * | 2015-11-03 | 2016-01-06 | 江苏省金峰石油机械制造有限公司 | Gas well blocking device |
| CN109339751A (en) * | 2018-10-19 | 2019-02-15 | 中国石油天然气股份有限公司 | It is a kind of easily to bore formula composite throttling device and application method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20101110 |
|
| CX01 | Expiry of patent term |