CN2163230Y - Dual-function sword-like back-pressure valve - Google Patents
Dual-function sword-like back-pressure valve Download PDFInfo
- Publication number
- CN2163230Y CN2163230Y CN 93238636 CN93238636U CN2163230Y CN 2163230 Y CN2163230 Y CN 2163230Y CN 93238636 CN93238636 CN 93238636 CN 93238636 U CN93238636 U CN 93238636U CN 2163230 Y CN2163230 Y CN 2163230Y
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- seal receptacle
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Abstract
The utility model relates to an arrow-shaped back-pressure valve, which is needed in the process of well drilling of petroleum and natural gas. The utility model solves the defect that at the time of drilling to a regional air layer, the lower end of a kelly saver sub is provided with a long cluster of joints, making the operation of well head safe, convenient and simple. On the basis of the existing arrow-shaped back-pressure valve, a cycle channel between a supporting base 9 and a seal seat 10 is added, and the channel is opened or closed according to the compression condition of the spring 13 of a seal seat. The utility model can both realize the function of a blowout, prevent the drilling tool of the arrow-shaped back-pressure valve and prevent stored mud in a kelly from being lost at the time of pulling out or connecting with a drill rod. The utility model saves the time of flushing the drilling tool and realizes the function of a mud valve.
Description
The utility model relates to a kind of flechette-type back-pressure valve required in oil, the gas drilling process.
At oil; in the gas drilling process; in order to prevent gas blowout accident; when creeping into regional gas-bearing formation; just must connect drilling tool inner blowout preventer---flechette-type back-pressure valve in the kelly saver sub lower end; in normal drilling well stacks and trip-out process; in order to prevent that the mud outflow in the kelly bar fire hose headband from slatterning; influence the sanitation and hygiene of drilling tool; connect mud valve with regard to requiring in the lower end of drilling tool inner blowout preventer; because drilling tool inner blowout preventer and mud valve respectively are a kind of instruments, their length is respectively more than 400 millimeter and more than 600 millimeter, is connected on the kelly saver sub lower end; it is exactly very long a string joint; when dismounting and stacks, it is very inconvenient to operate, and the more important thing is that every many places connect on the well head drilling tool; with regard to many weak places, how a dangerous.
The purpose of this utility model designs and produces a kind of difunctional flechette-type back-pressure valve exactly, it can play the drilling tool preventer, and the control well underflow stream sprays in drilling tool, in the time of or pulling out of hole at stacks again, do not allow the interior mud of kelly bar flow out and slattern, realize the function of mud valve.
The utility model comprises valve body 1, pressure cap 2, packing box 3, packing box " O " type packing 4, sealing mat 5, packing ring 6, sealing arrow 7, splicing sleeve 8, bearing 9, it is characterized in that also comprising seal receptacle 10, seal receptacle " O " type packing 11, sealed socket sleeve 12, seal receptacle spring 13, spring pressure cap 14, sealed socket sleeve " O " type packing 15.Form sealing surface between bearing 9 and the seal receptacle 10.Seal receptacle " O " type packing 11 is housed in the packing groove of seal receptacle 10, and seal receptacle 10 is contained on the seal receptacle spring 13, and the lower end of seal receptacle spring 13 and spring pressure cap 14 join, and spring pressure cap 14 installs on the internal thread of sealed socket sleeve 12.
Fig. 1 is a structure chart of the present utility model.
The utility model comprises valve body 1, pressure cap 2, packing box 3, packing box " O " type packing 4, sealing mat 5, packing ring 6, sealing arrow 7, splicing sleeve 8, bearing 9, also comprises seal receptacle 10, seal receptacle " O " type packing 11, sealed socket sleeve 12, seal receptacle spring 13, spring pressure cap 14, sealed socket sleeve " O " type packing 15.Pressure cap 2 is contained on the internal thread of valve body 1, compresses the top of packing box 3.Packing box " O " type packing 4 is contained in the packing groove of packing box 3, packing box 3 be contained in sealing mat 5 above, packing ring 6 is arranged below the sealing mat 5, packing ring 6 is contained in the upper end of splicing sleeve 8, bearing 9 is contained in the splicing sleeve 8, sealing arrow 7 is contained on the bearing 9, and the bottom of bearing 9 places on the seal receptacle 10, forms sealing surface between the contact surface of bearing 9 and seal receptacle 10.Sealed socket sleeve 12 is housed below the splicing sleeve 8.Seal receptacle 10 is contained in the sealed socket sleeve 12, seal receptacle " O " type packing 11 is housed in its packing groove, seal receptacle spring 13 is housed below it, the lower end of seal receptacle spring 13 and spring pressure cap 14 join, spring pressure cap 14 be contained in sealed socket sleeve 12 internal thread on, seal receptacle " O " type packing 15 is positioned at below the spring pressure cap 14.
Operating principle of the present utility model is: circulation canal adopts seal receptacle spring 13 roof pressure seal receptacles 10 to form closed condition, when drilling process middle-opening pump circulating mud, seal receptacle 10 pressurizeds move down, 13 compressions of seal receptacle spring, form passage between seal receptacle 10 and the bearing 9, drilling mud is gone into well by passage; During termination of pumping, the pressure cancellation under the reaction of seal receptacle spring 13, moves on the seal receptacle 10, and passage is closed automatically.When the down-hole has overflow to scurry in drilling tool, the down-hole oil pressure relief acts on the bottom of bearing 9, bearing 9 is moved up, open the sealing surface of bearing 9 and seal receptacle 10, overflow is by the four-way passage on bearing 9 again behind the sealing surface, and oil pressure relief acts directly on the bottom acting surface of sealing arrow 7, makes sealing arrow 7 move up, end up to being close to the hermetically closing overflow ducts, reach the purpose that automatic control well underflow stream sprays in the drilling tool with sealing mat 5.When the recovery pressure balance was eliminated in the down-hole overflow, sealing arrow 7 and bearing 9 moved down the circulation canal of closing between bearing 9 and the seal receptacle 10 automatically.
The utility model is installed in the protection joint lower end of kelly bar bottom and goes into the well drilling well; when stacks or trip-out; this back-pressure valve is unloaded down from drill string with kelly bar; at this moment the mud pressure of storing in the kelly bar is not enough to open the circulation canal between bearing 9 and the seal receptacle 10; the interior mud of kelly bar is not flowed out slattern, realized the function of mud valve.
The utility model has the advantages that the function that integrates sword-like back-pressure valve and mud valve, overcome the shortcoming of the very long string joint in former kelly bar bottom, make well head easy and simple to handle, safe and reliable, the utility model is rational in infrastructure, and is easy to process, implements in applicant unit, effective, welcome by operating personnel.
Claims (1)
1, difunctional flechette-type back-pressure valve, comprise valve body (1), pressure cap (2), packing box (3), packing box " 0 " type packing (4), sealing mat (5), packing ring (6), sealing arrow (7), splicing sleeve (8), bearing (9), it is characterized in that also comprising seal receptacle (10), seal receptacle " 0 " type packing (11), sealed socket sleeve (12), seal receptacle spring (13), spring pressure cap (14), sealed socket sleeve " 0 " type packing (15); Pressure cap (2) is contained on the internal thread of valve body (1), compress the top of packing box (3), packing box " 0 " type packing (4) is contained in the packing groove of packing box (3), packing box (3) be contained in sealing mat (5) above, the following of sealing mat (5) is packing ring (6), packing ring (6) is contained in the upper end of splicing sleeve (8), bearing (9) is contained in the splicing sleeve (8), sealing arrow (7) is contained on the bearing (9), the bottom of bearing (9) places on the seal receptacle (10), form sealing surface between the contact surface of bearing (9) and seal receptacle (10), seal receptacle (12) is housed below the splicing sleeve (8), seal receptacle (10) is contained in the sealed socket sleeve (12), seal receptacle " 0 " type packing (11) is housed in its packing groove, seal receptacle spring (13) is housed below it, the lower end of seal receptacle spring (13) and spring pressure cap (14) join, spring pressure cap (14) is contained on the internal thread of sealed socket sleeve (12), seal receptacle " 0 " type packing (15) be positioned at spring pressure cap (14) below.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93238636 CN2163230Y (en) | 1993-04-29 | 1993-04-29 | Dual-function sword-like back-pressure valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93238636 CN2163230Y (en) | 1993-04-29 | 1993-04-29 | Dual-function sword-like back-pressure valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2163230Y true CN2163230Y (en) | 1994-04-27 |
Family
ID=33813323
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 93238636 Expired - Fee Related CN2163230Y (en) | 1993-04-29 | 1993-04-29 | Dual-function sword-like back-pressure valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2163230Y (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102561995A (en) * | 2012-01-17 | 2012-07-11 | 中国石油大学(华东) | Underground floating valve with high-temperature resistance, high-pressure resistance and corrosion resistance |
| CN104763364A (en) * | 2015-03-13 | 2015-07-08 | 成都大漠石油机械有限公司 | Oil well underground forward and reverse cleaning tube column |
| CN106401528A (en) * | 2016-12-15 | 2017-02-15 | 成都市卓新实业有限公司 | Grouting method for drilling rod |
| CN107503711A (en) * | 2017-08-23 | 2017-12-22 | 东营市友佳石油科技有限公司 | A kind of cased hole completion arrow type back-pressure valve and method |
| CN108150134A (en) * | 2017-12-06 | 2018-06-12 | 中石化石油工程技术服务有限公司 | Drilling well boring tool inside blow-out preventer and method |
| CN110439505A (en) * | 2019-08-13 | 2019-11-12 | 广汉川油井控装备有限公司 | A kind of novel cartridge type back-pressure valve |
-
1993
- 1993-04-29 CN CN 93238636 patent/CN2163230Y/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102561995A (en) * | 2012-01-17 | 2012-07-11 | 中国石油大学(华东) | Underground floating valve with high-temperature resistance, high-pressure resistance and corrosion resistance |
| CN102561995B (en) * | 2012-01-17 | 2015-06-24 | 中国石油大学(华东) | Underground floating valve with high-temperature resistance, high-pressure resistance and corrosion resistance |
| CN104763364A (en) * | 2015-03-13 | 2015-07-08 | 成都大漠石油机械有限公司 | Oil well underground forward and reverse cleaning tube column |
| CN106401528A (en) * | 2016-12-15 | 2017-02-15 | 成都市卓新实业有限公司 | Grouting method for drilling rod |
| CN106401528B (en) * | 2016-12-15 | 2019-05-21 | 成都市卓新实业有限公司 | A kind of drilling rod grouting method |
| CN107503711A (en) * | 2017-08-23 | 2017-12-22 | 东营市友佳石油科技有限公司 | A kind of cased hole completion arrow type back-pressure valve and method |
| CN108150134A (en) * | 2017-12-06 | 2018-06-12 | 中石化石油工程技术服务有限公司 | Drilling well boring tool inside blow-out preventer and method |
| CN110439505A (en) * | 2019-08-13 | 2019-11-12 | 广汉川油井控装备有限公司 | A kind of novel cartridge type back-pressure valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |