Hauv kev lag luam drilling,laum dab tshosyog hnyav, tuab-walled, thiab nruj steel tubes uas tsim thawj feem ntawm lubHauv qab qhov sib dhos (BHA). Thaum lub laum yeeb nkab ua rau ntau qhov ntev ntawm lub qhov dej, lub laum dab tshos ua "hnyav nqa" hauv qab.
Los ntawm 3-1/8 "rau 9-1/2", peb muaj qhov hnyav koj xav tau.Tshawb xyuas peb lub sijhawm tiag tiag - lub sijhawm laum dab tshos cov khoom muag.
plaub qhov tseem ceeb ntawm kev siv laum dab tshos:
Muab Qhov hnyav ntawm ntsis (WOB)
Qhov no yog qhov tseem ceeb tshaj plaws ua haujlwm ntawm lub dab tshos laum. Txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau yog pob zeb, lub laum me ntsis yuav tsum tau muab tshem tawm.
Vim tias cov hlua tho qhov hnyav hnyav heev (ntau tons ntawm ib qho kev sib koom tes), lawv siv lub ntiajteb txawj nqus los thawb me ntsis rau hauv kev tsim.
Yog tsis muaj cov dab laum, lub nyias- cov yeeb nkab laum phab ntsa yuav yog lub teeb dhau los muab lub zog tsim nyog rau kev txiav me ntsis kom zoo, ua rau cov neeg pluag.Rate of Penetration (ROP).
Khaws lub Drill Pipe nyob rau hauv Tension
Txujlaum cevyog hloov tau yooj yim. Yog tias koj sim "them" ib txoj hlua ntev ntawm nyias cov yeeb nkab los ntawm sab saum toj, nws yuav buckle, khoov, thiab nws thiaj li snap (zoo ib yam li thawb ib daim ntub dej spaghetti).
Los ntawm qhov muab cov tho hnyav rau hauv qab, lub"Neutral Point"(qhov kev hloov ntawm compression thiab nro) yog khaws cia nyob rau hauv cov tuab-cov dab tshos.
Qhov no ua kom ntseeg tau tias tag nrho cov hlua ntawm cov yeeb nkab laum saum lub dab tshos yog ib txwm uarub (hauv nro), uas ua rau txoj hlua ncaj thiab tiv thaiv kev ua haujlwm tsis zoo.
Tswj Verticality thiab Stability (Lub Pendulum Effect)
Laum dab tshos yog nruj heev thiab tiv taus dabtsi yog khoov.
Lawv nruj ua raws li ib tugpib bob, pab lub laum me ntsis tswj txoj kev ncaj, ntsug.
Nyob rau hauv kev taw qhia drilling, lub rigidity ntawm dab tshos muab ib tug ruaj khov platform rau steering cuab yeej thiab xyuas kom meej lub wellbore tsis deviate unintentionally.
Dampening kev vibrations
Raws li lub laum me ntsis grinds los ntawm cov pob zeb sib txawv, nws tsim qhov tseem ceeb "sib tham" thiab siab - zaus vibrations.
Lub loj loj ntawm lub laum dab tshos ua raws li ib tugshock absorber, dampening cov kev vibrations ua ntej lawv tuaj yeem mus txog txoj hlua thiab ua rau cov khoom siv tho yeeb nkab ntau dua los yog cov khoom nto.
Cov ntawv thov tshwj xeeb
Nyob ntawm qhov chaw zoo, cov qauv sib txawv ntawm cov dab tshos yog siv:
Slick Drill Collars:Standard du cylinders siv nyob rau hauv feem ntau ntsug, tsis tshua muaj - qhov dej txaus ntshai.
Spiral Drill Collars:Cov no muaj helical grooves machined rau saum npoo. Lawv siv los tiv thaivDifferential Sticking(qhov twg cov yeeb nkab tau nqus tawm ntawm phab ntsa hauv qhov dej vim qhov sib txawv ntawm qhov sib txawv) los ntawm kev txo qhov chaw sib cuag.
Tsis yog -Magnetic Drill Collars:Ua los ntawm tshwj xeeb stainless hlau. Cov no yog siv rau hauv tsevMWD (Measurement while Drilling)cov cuab yeej, raws li lawv tsis cuam tshuam nrog cov magnetic sensors siv rau kev taw qhia lub qhov dej.
Summary Table: Vim li cas thiaj siv Drill Collar?
| Feature | Lub luag haujlwm ntawm Drill Collar |
| Downward Force | Muab lub ntiajteb txawj nqus-raws li qhov hnyav los tsoo pob zeb. |
| Kev tiv thaiv yeeb nkab | Khaws cov yeeb nkab nyias nyias los ntawm buckling hauv qab nws qhov hnyav. |
| Qhov tseeb | Nws rigidity ua kom lub qhov ncaj thiab txo wandering. |
| Durability | Absorbs zog thiab cua sov, tiv thaiv tus so ntawm txoj hlua xyaum. |
laum dab tshos Factory
laum dab tshos test equipments
laum dab tshos daim ntawv pov thawj
FAQ
Muaj pes tsawg hom laum dab tshos muaj?
Laum dab tshos feem ntau yog muab faib ua peb hom: cov khoom siv laum dab tshos, kauv tho dab tshos, thiab tsis yog- sib nqus laum dab tshos. Tsis tas li ntawd, muaj cov tshwj xeeb - hom phiaj xws li laum dab tshos nrog kelly saver subs, luv laum dab tshos, square drill dab tshos, thiab hnyav laum dab tshos.
Lub hom phiaj ntawm kev xyaum dab tshos yog dab tsi?
Lub luag haujlwm tseem ceeb ntawm cov dab tshos laum yog siv qhov hnyav ntawm me ntsis (WOB), ua kom qhov nruj ntawm txoj hlua xyaum, ua kom ruaj khov ntawm kev ua haujlwm drilling, thiab tswj qhov sib txawv ntawm qhov zoo. Nyob rau hauv qab ntawm txoj hlua laum nruab nrab ntawm lub laum yeeb nkab thiab lub ntsis, laum dab tshos, nrog lawv cov hnyav hnyav thiab rigidity siab, xyuas kom zoo pob zeb tawg thaum lub sij hawm drilling.
Lawv cov haujlwm tshwj xeeb suav nrog:
Thov WOB: Hloov axial quab yuam rau me ntsis los ntawm lawv tus kheej qhov hnyav, uas yog qhov tseem ceeb rau kev ua haujlwm zoo;
Txhim kho qhov tawv nqaij: txo qis txoj hlua tho kev khoov thiab kev co, tiv thaiv me ntsis deflection, thiab txhim kho qhov zoo ntawm borehole;
Stabilizing Directional Control : Pab tswj xyuas qhov xav tau ntawm lub qhov dej hauv qhov dej taw qhia thiab tsis txhob muaj qhov sib txawv ntau dhau;
Tiv thaiv Drilling Tools : Ua haujlwm tseem ceeb ntawm lub hauv qab qhov sib dhos (BHA), txo cov kev ntxhov siab thiab txuas ntxiv lub neej kev pab cuam ntawm ob qho tib si laum thiab laum kav.
