Downhole Positive Displacement Motor (PDM Drill)

Chobowolera cha PDM (Positive Displacement Motor) ndi mota yosunthira pansi yomwe imagwiritsa ntchito madzi obowolera ngati mphamvu yosinthira mphamvu ya hydraulic kukhala mphamvu yamakina. Matope omwe amapopedwa ndi pampu yamatope akamayenda kudzera muvalavu yodutsaNdipo ikalowa mu injini, kusiyana kwa kuthamanga kumapangidwa pakati pa kulowa ndi kutuluka kwa injini. Izi zimakankhira rotor kuti izungulire mozungulira mzere wa stator, kutumiza liwiro ndi torque kudzera mu universal joint ndi drive shaft kupita ku drill bit, motero zimathandiza ntchito zobowola.

Zigawo Zoyambira

Bowola la PDM limakhala ndi magulu anayi akuluakulu: valavu yodutsa,mota yamatope, cholumikizira cha universal, ndi shaft yoyendetsera.

Mota yozungulira ndiye chinthu chachikulu chomwe chimagwiritsidwa ntchito. Malinga ndi machitidwe ndi kusanthula kwa chiphunzitso, kuti mota igwire bwino ntchito, kutsika kwa kuthamanga kwa mpweya pa gawo lililonse la mota sikuyenera kupitirira 0.8 MPa. Kupanda kutero, mota ikhoza kutuluka madzi, zomwe zimapangitsa kuti liwiro lichepe mofulumira kapena kuyima kwathunthu, zomwe zingawononge mota.

Chingwe chimodzi cha mota chimatanthauzidwa ngati gawo limodzi. Kuthamanga kwa matope komwe kumagwiritsidwa ntchito pamalopo kuyenera kukhala mkati mwa mulingo woyenera; apo ayi, kudzakhudza magwiridwe antchito a mota ndipo kungapangitse kuti kuwonongeka kuwonjezere. Magawo a magwiridwe antchito a mota ya screw ndi magawo akuluakulu a magwiridwe antchito a PDM drill.

Mphamvu yotulutsa mphamvu ya injini imafanana ndi kutsika kwa mphamvu ya mpweya, pomwe liwiro lotulutsa mphamvu limafanana ndi kuchuluka kwa madzi olowa. Pamene katundu akuwonjezeka, liwiro lozungulira la chida limachepa. Chifukwa chake, powongolera kuwerenga kwa mphamvu ya mpweya ndi kuchuluka kwa madzi otuluka pampopi pamwamba, mphamvu yotsika ndi liwiro lozungulira zimatha kuyendetsedwa.

Gawo la Valavu Yodutsa

Valavu yodutsa mpweya imapangidwa ndi thupi la valavu, chivundikiro cha valavu, chivundikiro cha valavu, kasupe, ndi zina. Pansi pa mphamvu ya kupanikizika, chivundikiro cha valavu chimatsetsereka mkati mwa chivundikiro cha valavu. Kuyenda kwa chivundikiro cha valavu kumasintha njira ya madzi oyenda, zomwe zimatha kuyika valavu yodutsa mpweya mu mkhalidwe wodutsa mpweya kapena wotsekedwa.

Mukalowa ndi kutuluka, njira zomwe zili mu valavu ndi thupi la valavu sizimatsekedwa, kotero valavu yodutsa imakhala mu mkhalidwe wa kupitirira. Izi zimalola matope ochokera ku chingwe chobowolera kudutsa mota ndikulowa mu annulus.

Pamene kuthamanga kwa matope ndi kuthamanga kwawo kufika pamlingo wokhazikika, valavu imatsika, kutseka madoko a valavu yodutsa. Kenako, matopewo amadutsa mu mota, n’kusintha mphamvu ya hydraulic kukhala mphamvu yamakina.

Ngati matope akuyenda pang'ono kwambiri kapena pampu yayimitsidwa, kasupe amakankhira valavu mmwamba, kutsegula madoko odutsa ndikuyika valavuyo mu mkhalidwe wa kudutsa.

Mota (Gawo la Mphamvu)

Motayo imakhala ndi stator ndi rotor. Stator imapangidwa mwa kupanga jekeseni ya rabara kukhala chubu chachitsulo. Bore yake yamkati ili ndi mawonekedwe ozungulira okhala ndi magawo enaake a geometric. Rotor ndi ndodo ya screw yokhala ndi malo olimba.

Rotor ndi stator zili ndi mauna awiriawiri. Kusiyana kwa ma lead awo kumapanga mabowo ozungulira otsekedwa, omwe amathandiza kusintha mphamvu.

Ma helikisi a rotor ya mota akhoza kukhala single-lobe kapena multi-lobe. Ma rotor lobes ochepa, liwiro limakwera komanso torque imatsika; ma lobes ambiri, liwiro limatsika ndipo torque imakwera.

Chigwirizano cha Padziko Lonse

Ntchito ya cholumikizira cha Universal ndikusintha kayendedwe ka dziko lapansi ka mota kukhala kuzungulira kokhazikika kwa shaft yoyendetsa ndikutumiza mphamvu ndi liwiro lopangidwa ndi mota kupita ku shaft yoyendetsa kenako ku drill bit. Mtundu wa shaft wosinthasintha wa cholumikizira cha Universal umagwiritsidwa ntchito kwambiri.

Shaft Yoyendetsa

Ntchito ya shaft yoyendetsera galimoto ndi kutumiza mphamvu yozungulira ya mota kupita ku drill bit pamene ikupirira katundu wa axial ndi radial wopangidwa ndi kulemera kwa shaft. Chifukwa chake, shaft yoyendetsera galimoto imafuna kuuma kwambiri, kukana kuwonongeka, komanso moyo wautali wa ntchito. Kuzimitsa kutentha kumatha kukulitsa kwambiri moyo wa ntchito ya shaft yoyendetsera galimoto.

Lumikizanani: Jessie Zhou

Foni yam'manja/Whatsapp:+0086-18109206861

Email: energy@landrilltools.com