CN101915069A - Sulfur-resistant oil and gas extraction wellhead device provided with structure for replacing No.1 main control valve - Google Patents
Sulfur-resistant oil and gas extraction wellhead device provided with structure for replacing No.1 main control valve Download PDFInfo
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- CN101915069A CN101915069A CN2010102367479A CN201010236747A CN101915069A CN 101915069 A CN101915069 A CN 101915069A CN 2010102367479 A CN2010102367479 A CN 2010102367479A CN 201010236747 A CN201010236747 A CN 201010236747A CN 101915069 A CN101915069 A CN 101915069A
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Abstract
The invention provides a sulfur-resistant oil and gas extraction wellhead device provided with a structure for replacing a No.1 main control valve. The device comprises a wellhead cut-off device and a pressure balancing device, wherein the wellhead cut-off device consisting of an operating rod and a movable sealing device is arranged on an oil gas well in an oil pipe hanger below the No.1 main control valve; the movable sealing device is arranged in the oil gas well in the oil pipe hanger and has a movable sealing surface corresponding to a flow passage cross section in an oil gas passage; one end of the operating rod is connected with a rotary sealing device while the other end passes through a wall of the oil pipe hanger and extends by a certain distance; and the pressure balancing device is a high-pressure gas passage of which one end is connected to the oil gas passage of a four-way casing valve of a tubing head below the No.1 main control valve while the other end is connected to the oil gas passage of a Christmas tree production valve above the No.1 main control valve. The device has the advantages of simple overall structure, accordance with the standard, scientific and reasonable design, convenient, rapid, safe and reliable use, no need of large-size special equipment and wide application range.
Description
Technical field
The invention belongs to oil recovery (gas) wellhead assembly.Especially a kind of sulfur-resistant oil and gas extraction wellhead device of changing No. 1 main control valve structure of providing for oneself.
Background technology
The structure of oil and gas extraction wellhead device is varied.Be roughly the double-vane wellhead assembly according to various functions, single-blade wellhead assembly, dual tubing wellhead, Monohole top device etc.Various wellhead assemblies can both be brought into play function separately, can both control the crude oil in the oil gas well, the pressure of natural gas, the flow direction of output and fluid media (medium).Since sulfur-resistant oil and gas extraction wellhead device in a single day be installed in produce hydrocarbons aboveground after, the total gate valve that No. 1 main control valve on the oil recovery gas tree is exactly a control well inner high voltage hydrocarbon fluids.It will directly control from the stratum hydrocarbon fluids, say that for the gas well that produces oil flatly it is vital.It just may make this loss of well control in case generation leakage or valve stem packing damage, and causes hardly imaginable serious consequence.
Before this, as shown in Figure 1, the oil and gas extraction wellhead device of designed production is by installing a counterbalance valve in the tubing hanger in the tubing head body 2 between production tree I and casing head III, thereby blocks the oil gas borehole fluid, again No. 1 master control gate valve 1 of operation replacing.This counterbalance valve tubing hanger is fixedly mounted in the tubing hanger, adopts screw thread to fix, still, because the screw thread of processing is subjected to the corrosion of high-pressure oil gas fluid scouring or fluid media (medium) for a long time in the tubing hanger, just might can't fixed counterbalance valve.Simultaneously, when needs are changed No. 1 master control gate valve 1, also to dismantle No. 4 gate valves 5 with top and a dedicated hydraulic instrument that reaches about 3～4 meters is installed counterbalance valve could be sent to permanent position in the tubing hanger, also will operate hydraulic stem simultaneously and tighten fixedly counterbalance valve by the workman.In case the screw thread in the tubing hanger is corroded or washes away, just at this moment fixing counterbalance valve just has only the kill-job of employing weighted mud to change main control valve No. 1, can spend great amount of manpower, financial resources like this.Spend up to a millionly at least, spend millions of RMB at most, also can damage or contaminated environment simultaneously the shaft bottom layer of oil gas production.
Summary of the invention
The objective of the invention is to solve the blank of prior art, a kind of safety is provided, provide the sulfur-resistant oil and gas extraction wellhead device of changing No. 1 main control valve structure reliably for oneself, satisfy the functional need in the oil gas well mining process.
The technical solution adopted in the present invention is:
A kind of sulfur-resistant oil and gas extraction wellhead device of changing No. 1 main control valve structure of providing for oneself comprises well head cutting device and pressure equaliser; The well head cutting device that is made of action bars and movable sealing device is arranged on No. 1 oil gas hoistway in the tubing hanger of main control valve below, the movable sealing device is installed in oil gas hoistway inside in the tubing hanger, the movable sealing device has the movable sealing face in traffic channel cross section in the corresponding gas channel, and action bars one end connects rotary sealing appts, the other end passes the oil pipe wall built-up and extends a segment distance; Pressure equaliser is a high pressure air flue, and the production tree on the gas channel of the tubing head four-way casing valve of this No. 1 main control valve below of high pressure air flue one end connection, above No. 1 main control valve of other end connection produces on the valve oil gas passage.
Be sealed and installed with tubing hanger in the described tubing head, rotary sealing appts is a rotary sealing appts, comprise rotatory sealing body, upper seal support, bottom sealing socket and turning cylinder, upper and lower seal receptacle is the cover tubular, symmetry is installed in the tubing hanger, the internal diameter size of upper and lower seal receptacle is consistent, constitutes traffic channel; The rotatory sealing body is arranged between the upper and lower seal receptacle, by turning cylinder and joystick shaft to being connected; The internal diameter size of the corresponding upper and lower seal receptacle in the cross section of rotatory sealing body, its both sides have and the corresponding structure of upper and lower seal receptacle end face.
The internal diameter of described upper and lower seal receptacle is Long Circle, the lower surface of upper seal support and the upper surface of bottom sealing socket have the spherical angle of symmetry, the upper and lower both sides of rotatory sealing body have the spherical structure corresponding with the spherical angle of upper and lower seal receptacle, distance between distance=upper and lower both sides of rotatory sealing body between the spherical angle of the corresponding bottom sealing socket in the upper seal support spherical angle bottom bottom, the length of long sides of spherical angle.
The junction of described rotatory sealing body and turning cylinder has groove on the rotatory sealing body, has the fixture block corresponding with this groove on the turning cylinder.
The junction of described rotary sealing appts and tubing hanger inner pipe wall has joint ring.
Described tubing head outside has a circular hole around the action bars, is furnished with the high pressure seal of action bars in the circular hole.
Described high pressure seal is one group of airtight and watertight padding and gland, and airtight and watertight padding is seated in circular hole inside, the filler pressure cap by with tubing head four-way body on screw-threaded engagement, coaxial installation and fixing operation bar.
Described high pressure air flue is a high-pressure hose, and an end is connected with casing valve on the tubing head four-way body, the other end is connected production tree and produces on the valve.
Described tubing hanger external Design has one to observe groove, the link position of respective operations bar and turning cylinder.
Advantage of the present invention and good effect are:
1. the sulfur-resistant oil and gas extraction wellhead device of changing No. 1 main control valve structure of providing for oneself of the present invention has the function of reliable control high-pressure oil gas producing well internal channel. as long as in this device working pressure range, just effectively control well inner high voltage fluid flows.
2. the function of providing the sulfur-resistant oil and gas extraction wellhead device of changing No. 1 main control valve structure for oneself of the present invention: fast, when reliably cutting off producing well inner high voltage hydrocarbon fluids, need not any special installation, with regard to No. 1 main control valve in the replaceable oil recovery gas tree.
4. the function of providing the sulfur-resistant oil and gas extraction wellhead device of changing No. 1 main control valve structure for oneself of the present invention: applied widely, adopt different materials processing control parts, just can satisfy the instructions for use under the varying environment, adaptive technique standard: PSL1, PSL2, PSL3, PSL3G, PSL4.
Adopt different processing technology and manufacture method, just can satisfy the performance requirement of sulfur-resistant oil and gas extraction wellhead device: PR1, PR2.
It is 5. of the present invention that to provide the sulfur-resistant oil and gas extraction wellhead device overall structure of changing No. 1 main control valve structure for oneself simple, compact being suitable for, design science is reasonable: when changing No. 1 main control valve in the oil recovery gas tree on producing well, do not need special installation or instrument, only need 3～4 people just can change No. 1 main control valve in the oil recovery gas tree effectively fast at short notice.This well just can be resumed production in 3～4 hours.
Be adapted to the pressure span scope: between 14MPa～105MPa;
The control pipe aperture is: 11/2in, 2 in, 21/2 in, 3 in;
It is a kind of brand-new sulfur-resistant oil and gas extraction wellhead device of providing No. 1 main control valve structure of replacing for oneself.
Description of drawings
Fig. 1 is the prior art constructions schematic diagram.
Fig. 2 is a structural representation of the present invention.
Fig. 3 is the partial enlarged drawing of well head cutting device IV among Fig. 2.
Number in the figure is represented: I-production tree, II-tubing head, III-casing head, 1-1 master control gate valve, 2-bolt, 3-tubing head four-way body, the 4-steel loop, 5-4 gate valve, IV-well head cutting device, the 6-high-pressure hose, 7-tubing hanger, 8-sealing ring, the big pendant collet of 9-, 10-hole spring lattice circle, the 11-annulus, the 12-action bars, 13-filler pressure cap, 14-airtight and watertight padding, the 15-switch block, 16-joint ring, 17-packing ring, the 18-bottom sealing socket, 19-wavy spring, 20-fixture block, 21-rotatory sealing body, the 22-turning cylinder, the little pendant collet of 23-, 24-upper seal support.
The specific embodiment
Below in conjunction with Fig. 2～Fig. 3, the specific embodiment of the present invention is further described, need to prove: present embodiment is descriptive, is not determinate, can not limit protection scope of the present invention with this.
The present invention is a kind of sulfur-resistant oil and gas extraction wellhead device of changing No. 1 master control gate valve 1 structure of providing for oneself, is arranged on the tubing head II between production tree I and the casing head III, comprises cutting device 9 and pressure equaliser in the well head.Fixedly tubing hanger 7 is in tubing head four-way body 3 inside by jackscrew in the tubing head II, and the bottom that is furnished with sealing ring 8, tubing hanger 7 between the inwall of tubing hanger 7 and tubing head four-way body 3 also is furnished with joint ring 16 and packing ring 17, plays more perfect sealing function.Cutting device 9 is arranged in your position of tubing head four-way body 3 of No. 1 master control gate valve 1 below in the well head, comprise action bars 12 and rotary sealing appts, rotary sealing appts is fixedly mounted on the inwall of tubing hanger 7 of No. 1 master control gate valve 1 below, action bars 12 is installed in the outside of tubing head four-way body 3, is used for controlling the rotatory sealing body and opens or closes.
Rotary sealing appts comprises rotatory sealing body 21, upper seal support 24, bottom sealing socket 18, sealing ring 29, switch block 15 and turning cylinder 22.Big pendant collet 9 and little pendant collet 23 are installed in tubing hanger 7 bodies.
Big pendant collet 9 is rotatory sealing body 21, upper seal support 24, bottom sealing socket 18 and sealing ring 29 fixedly, makes them form the integral body of a control gas stream passage, and little pendant collet 23 is switch block 15 and turning cylinder 22 fixedly, makes them form the master switch of a control fluid.Arrange porose spring spacer ring 14 and the annulus 11 used between big pendant collet 9 and the upper seal support 24, annulus 11 supports big pendant collet 9, and more stable reinforcing, the effect of sealing are played with playing spacer ring 14 further clamping ringss 11 in the hole.Both are furnished with wavy spring 19 between contacting bottom sealing socket 18 and tubing hanger 7, and bottom sealing socket 18 contacts with rotatory sealing body 21 all the time, reaches the effect of good seal.
Spherical in upper seal support 24 and bottom sealing socket 18 are, symmetry is installed on the inwall of tubing hanger 7, and the interior spherical size of upper seal support 24 and bottom sealing socket 18 is consistent, and oil gas flows by upper seal support 24 and bottom sealing socket 18 internal channels.Rotatory sealing body 21 is arranged between upper seal support 24 and the bottom sealing socket 18, and the internal diameter size of corresponding upper seal support 24 in cross section and bottom sealing socket 18 is identical, and its both sides have and upper seal support 24 and 18 corresponding structures of sphere of bottom sealing socket.Rotatory sealing body 21 constitutes the oil gas traffic channel with the internal diameter of upper seal support 24 and bottom sealing socket 18.
Rotatory sealing body 21 axially is connected with action bars 12 by turning cylinder 22, and action bars 12-turning cylinder 22-rotatory sealing body 21 is connected as a single entity, and reaches the purpose of interlock, utilizes action bars 12 to block gas channel.Have groove on the end face of rotatory sealing body 21, an end of turning cylinder 22 has the fixture block corresponding with this groove 20, by being connected of the groove on fixture block 20 and the rotatory sealing body 21, makes the corresponding connection with the rotatory sealing body of turning cylinder 22.Action bars 12 is installed in the inside of turning cylinder 22, makes action bars 12 by turning cylinder 22, axially is connected with rotatory sealing body 21.Be furnished with switch block 15 on the gabarit of turning cylinder 22, turning cylinder 22 is played effect fixing, that support and cooperate its rotation.Between switch block 15 and the turning cylinder 22, between switch block 15 and the tubing hanger 7, sealing ring 8 is installed all, make it to reach better sealing, fixed effect.
The upper surface of the lower surface of upper seal support 24 and bottom sealing socket 18 has the spherical angle of symmetry, the upper and lower both sides of rotatory sealing body 21 have and the corresponding spherical structure of above-mentioned spherical angle, distance between distance=rotatory sealing body 21 upper and lower both sides between the corresponding bottom sealing socket 18 spherical angle bottoms, upper seal support 24 spherical angle bottoms, the length of long sides of the spherical angle=rotatory sealing body 21 upper and lower dual-side length of sides.When action bars 12 was original state, the both sides of rotatory sealing body 21 contacted with the spherical angle of upper seal support 24, bottom sealing socket 18, constituted the oil gas traffic channel of opening; When action bars 12 half-twists, the both sides of rotatory sealing body 21 contact with the sphere of upper seal support 24, bottom sealing socket 18, and the oil gas traffic channel is blocked.
There is a circular hole outside of tubing head four-way body 3 around the action bars 12, is furnished with the high pressure seal of action bars 12 in the circular hole.This high pressure seal is one group of airtight and watertight padding 14 and gland 17, and airtight and watertight padding 14 is seated in circular hole inside, filler pressure cap 13 by with tubing head four-way body 3 on screw-threaded engagement, coaxial installation is also fixing, seal operation bar 12.
Pressure equaliser comprises high-pressure hose and connector thereof.In the present embodiment, high-pressure hose 6 is by connector, and an end is connected on tubing head four-way body 3 casing valves, the other end is connected on the production valve of production tree I.Because in the present embodiment, the oil gas tree that high-pressure hose 6 is connected production tree I produces on the valve, therefore, need not reinstall valve on this, the valve of tubing pressure bascule is the valve of production tree I, the pressure of oil gas in the control high-pressure hose 6, flow.
Tubing hanger 7 peripheral hardwares are observed groove in respect of one.During on-the-spot the installation, be used to observe the situation of docking of turning cylinder 22 on action bars 12 and the tubing hanger 7 on the tubing head four-way body 3.
Cutting device 9 can satisfy the sulfur resistance requirement of different oil and gas extraction wellhead devices by adopting different processing technology and manufacture method in the well head.According to flow medium difference in the well, device can wholely use stainless steel or corrosion resistant alloy, and stainless steel divides 316 again, 316L, 304,304L; General also passable with alloy steel of flow sulfur-bearing requires the inlet device of general anti-sulphur to adopt the valve body forged steel in the well, its inner body with 304 or alloy can.Used anti-sulfur materials and process of surface treatment during fabrication, can make the sulfur-resistant oil and gas extraction wellhead device of changing No. 1 main control valve structure of providing for oneself of the present invention satisfy sulfur resistance class requirement: PR1, PR2 in the applications of sulfur-containing medium.Adopt different materials processing control parts, just can satisfy the instructions for use under the varying environment, adaptive technique standard: PSL1, PSL2, PSL3, PSL3G, PSL4.
Using method of the present invention is:
This sulfur-resistant oil and gas extraction wellhead device of providing No. 1 main control valve structure of replacing for oneself is a kind of innovation on the basis of common oil and gas extraction wellhead device, be the master switch of design and installation one control fluid in tubing hanger 7, this master switch is controlled opening or closing of traffic channel in the rotary sealing appts by being installed in action bars 12 on the tubing head four-way body 3.
At first, tubing hanger 7 is seated on request the design position of tubing head four-way body 3 inside, parts such as rotatory sealing body 21, upper seal support 24, bottom sealing socket 18, sealing ring 29, switch block 15 and turning cylinder 22 are installed by tubing hanger 7, simultaneously, the action bars 12 that is installed on the tubing head four-way body 3 is linked to each other with turning cylinder 22 on the tubing hanger 7, action bars 12-turning cylinder 22-rotatory sealing body 21 is connected as a single entity, reaches the purpose of interlock.And on request above-mentioned parts are carried out water-stop, hermetic seal experiment, it is qualified to test, and is installed in the oil pipe hanging body again.
During on-the-spot the use:
When oil gas well ordinary production, providing the sulfur-resistant oil and gas extraction wellhead device of changing No. 1 main control valve structure for oneself is a fluid passage, and gas stream flows out by the gas stream passage between 11 in rotatory sealing body 21 and the oil pipe hanging body.
When in case leakage or valve stem packing damage take place in No. 1 master control gate valve 1 on the production tree I, field worker can be used general tool will be installed in the outer action bars 12 of tubing head four-way body 3 and turn clockwise 90 ° of action bars just, within 1 minute, rotatory sealing body 21 just can block 11 gas stream in the oil pipe hanging body.Because rotatory sealing body 21 is upper and lower all pressure, make the upper and lower pressure balance of rotatory sealing body 21, operation rotary manipulation bar 12, it is little to close moment, and this moment, one people just can close rotatory sealing body 21 by easy manipulation rotary manipulation bar 12, blocked 11 oil gas runners in the oil pipe hanging body.After closing the gas stream passage, bleed off the high-pressure fluid in the production tree I, both can be quick, safety is changed No. 1 master control gate valve 1, after having changed No. 1 master control gate valve 1, again the high-pressure hose 6 of pressure equaliser is correctly installed, one end is connected on the casing valve of tubing head four-way body 3, the other end is connected on the production valve of oil gas tree of production tree I, open the casing valve that is connected tubing head four-way body 3, sleeve pipe oil gas flows in the tubing head four-way body 3 are entered in the production tree I by high-pressure hose 6, make rotation seals 21 in the tubing hanger 7 on, at this moment pressure balance has been rotated counterclockwise 90 ° of action bars just, borehole fluid is entered in the production tree I by rotatory sealing body 21, close the casing valve that connects high-pressure hose 6 and produce valve, lay down high-pressure hose 6, this oil gas well just can resume production immediately.
Claims (9)
1. provide the sulfur-resistant oil and gas extraction wellhead device of changing No. 1 main control valve structure for oneself for one kind, it is characterized in that: comprise well head cutting device and pressure equaliser; The well head cutting device that is made of action bars and movable sealing device is arranged on No. 1 oil gas hoistway in the tubing hanger of main control valve below, the movable sealing device is installed in oil gas hoistway inside in the tubing hanger, the movable sealing device has the movable sealing face in traffic channel cross section in the corresponding gas channel, and action bars one end connects rotary sealing appts, the other end passes the oil pipe wall built-up and extends a segment distance; Pressure equaliser is a high pressure air flue, and the production tree on the gas channel of the tubing head four-way casing valve of this No. 1 main control valve below of high pressure air flue one end connection, above No. 1 main control valve of other end connection produces on the valve oil gas passage.
2. the sulfur-resistant oil and gas extraction wellhead device of changing No. 1 main control valve structure of providing for oneself according to claim 1, it is characterized in that: in the described tubing head four-way body tubing hanger is installed, the movable sealing device is a rotary sealing appts, comprise rotatory sealing body, upper seal support, bottom sealing socket and turning cylinder, upper and lower seal receptacle is the cover tubular, symmetry is installed in the tubing hanger, and the interior wide size of upper and lower seal receptacle is consistent, constitutes traffic channel; The rotatory sealing body is arranged between the upper and lower seal receptacle, by turning cylinder and joystick shaft to being connected; The interior latus rectum size of the corresponding upper and lower seal receptacle in the cross section of rotatory sealing body, its both sides have and the corresponding structure of upper and lower seal receptacle end face.
3. the sulfur-resistant oil and gas extraction wellhead device of changing No. 1 main control valve structure of providing for oneself according to claim 2, it is characterized in that: the interior exterior feature of described upper and lower seal receptacle is spherical in shape, the lower surface of upper seal support and the upper surface of bottom sealing socket have the spherical angle of symmetry, the upper and lower both sides of rotatory sealing body have the spherical structure corresponding with the spherical angle of upper and lower seal receptacle, the distance between the distance=upper and lower both sides of rotatory sealing body between the spherical angle of the corresponding bottom sealing socket in the upper seal support spherical angle bottom bottom.
4. the sulfur-resistant oil and gas extraction wellhead device of changing No. 1 main control valve structure of providing for oneself according to claim 2 is characterized in that: the junction of described rotatory sealing body and turning cylinder, have groove on the rotatory sealing body, and have the fixture block corresponding on the turning cylinder with this groove.
5. the sulfur-resistant oil and gas extraction wellhead device of changing No. 1 main control valve structure of providing for oneself according to claim 1, it is characterized in that: the junction of described rotary sealing appts and tubing hanger inner pipe wall has joint ring.
6. the sulfur-resistant oil and gas extraction wellhead device of changing No. 1 main control valve structure of providing for oneself according to claim 1 is characterized in that: described tubing head outside, have a circular hole around the action bars, and be furnished with the high pressure seal of action bars in the circular hole.
7. the sulfur-resistant oil and gas extraction wellhead device of changing No. 1 main control valve structure of providing for oneself according to claim 6, it is characterized in that: described high pressure seal is one group of airtight and watertight padding and gland, airtight and watertight padding is seated in circular hole inside, the filler pressure cap by with tubing head four-way body on screw-threaded engagement, coaxial installation and fixing operation bar.
8. the sulfur-resistant oil and gas extraction wellhead device of changing No. 1 main control valve structure of providing for oneself according to claim 1, it is characterized in that: described high pressure air flue is a high-pressure hose, and an end is connected with casing valve on the tubing head four-way body, the other end is connected production tree and produces on the valve.
9. the sulfur-resistant oil and gas extraction wellhead device of changing No. 1 main control valve structure of providing for oneself according to claim 1 is characterized in that: described tubing hanger external Design has one to observe groove, the link position of respective operations bar and turning cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102367479A CN101915069A (en) | 2010-07-23 | 2010-07-23 | Sulfur-resistant oil and gas extraction wellhead device provided with structure for replacing No.1 main control valve |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102367479A CN101915069A (en) | 2010-07-23 | 2010-07-23 | Sulfur-resistant oil and gas extraction wellhead device provided with structure for replacing No.1 main control valve |
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| CN101915069A true CN101915069A (en) | 2010-12-15 |
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| CN2010102367479A Pending CN101915069A (en) | 2010-07-23 | 2010-07-23 | Sulfur-resistant oil and gas extraction wellhead device provided with structure for replacing No.1 main control valve |
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| CN102926693A (en) * | 2012-10-26 | 2013-02-13 | 中国石油化工股份有限公司 | Method for plugging and reloading wellhead by using oil pipe plugging device |
| CN111022017A (en) * | 2019-11-22 | 2020-04-17 | 中国石油天然气集团有限公司 | Manual fracturing and production wellhead device and using method thereof |
| CN111022016A (en) * | 2019-11-22 | 2020-04-17 | 中国石油天然气集团有限公司 | Hydraulic fracturing and production wellhead device and using method thereof |
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| CN102926693A (en) * | 2012-10-26 | 2013-02-13 | 中国石油化工股份有限公司 | Method for plugging and reloading wellhead by using oil pipe plugging device |
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| CN111022017A (en) * | 2019-11-22 | 2020-04-17 | 中国石油天然气集团有限公司 | Manual fracturing and production wellhead device and using method thereof |
| CN111022016A (en) * | 2019-11-22 | 2020-04-17 | 中国石油天然气集团有限公司 | Hydraulic fracturing and production wellhead device and using method thereof |
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Application publication date: 20101215 |