【正文】 king position, and align the scale line of connector and bent sub. During the period of screw drill bination and drill pipe connection, pay attention to avoiding thread gluing and alternation.In order to prevent thread from moving in the operation, it is advised to keep in mind: Rotary direction of bit sub opposite the shell is counter clockwise. If you rotate turntable or clamp motor with turntable in wrong direction, thread loosening and thread off will occur on parts inside the screw drill. This is caution for the customers. Trip in the bined screw drill into borehole: Even though the outside of screw drill looks simple and it has enough rigidity, it still needs controlling tripin speed ,when drillers are stripping in screw drill. Otherwise, the screw drill may be damaged by san bridge, hole shoulder or casing shoe in the hole. When this happens, it is usually required to start pump, slowly to extend the hole for its passing. If it is a bent sub or bent shell, it is easily for bit side to touch the hard rock status and casing shoe etc on the bore wall. So periodically rotate screw drill bination to eliminate the influence of lateral drilling.As to deep and hitemperature well, it is advised periodically to conduct middle way recycling while stripping in the screw drill. Thus, this can protect the bit from plugging or protect stator from damaging due to high temperature. 不應(yīng)有鉆井液從旁通孔流出，檢查的目的僅是看鉆頭是否旋轉(zhuǎn)，不必持續(xù)很長(zhǎng)時(shí)間，操作過(guò)程中應(yīng)避免鉆頭與井口防噴器、井口管線接觸、碰撞。停泵后注意觀察旁通閥是否再次打開，使鉆井液從旁通孔排出。泵未完全停止之前，不要把旁通閥提到轉(zhuǎn)盤以上，防止污染井臺(tái)。6．1．6卸下方鉆桿，按設(shè)計(jì)的鉆具組合，分別把彎接頭、無(wú)磁鉆鋌、穩(wěn)定器等接好。將彎接頭擰入旁通閥之前，如果用斜口管鞋座造斜，應(yīng)檢查造斜鍵，保證斜口管鞋座處于正常的工作位置，并保證與接頭的彎頭刻線對(duì)準(zhǔn)。在所有鉆具組合及鉆桿連接過(guò)程中，注意防止粘扣錯(cuò)扣。為防止操作中移扣，建議裝卸過(guò)程中應(yīng)牢記：鉆頭接頭相對(duì)于殼體的旋向?yàn)楦┮暦磿r(shí)針方向。違反此項(xiàng)規(guī)定，如反向轉(zhuǎn)動(dòng)轉(zhuǎn)盤或用轉(zhuǎn)盤旋緊馬達(dá)以上的扣等，就會(huì)造成鉆具內(nèi)部零件的松扣或脫扣，請(qǐng)用戶注意。6．2把鉆具及其組合下到井眼里：盡管鉆具本身外形簡(jiǎn)單，且有足夠的剛性，司鉆下放鉆具時(shí)，仍需控制下放速度，否則易被井眼中的沙橋、井眼臺(tái)肩、套管鞋所損壞。遇有這樣的井段，往往需開動(dòng)鉆井泵，慢慢地?cái)U(kuò)大井眼再通過(guò)。如果用彎接頭或彎殼體，鉆頭側(cè)面就更容易碰上井壁的硬巖層和套管鞋等，因此要周期性的轉(zhuǎn)動(dòng)鉆具組合，以消除側(cè)鉆的影響。對(duì)于深井和高溫井，下放鉆具時(shí)建議周期性地進(jìn)行中途循環(huán)，這樣可以防止鉆頭堵塞，或因高溫造成鉆具定子損壞。I In case the fluid can not rapidly flow through the holes of bypass valve in the borehole, the stripin speed should be slowed down or suspended regularly for mud filling. Again in stripping in, take care, there occurs no percussion or direct stripin. Start Screw Drill : If screw drill is located at the hole bottom, you must lift it for . Then start the pump and record the readings of riser pressure. As pared with the calculated pressure value, it is also normal if it is over the pressure of hydraulic calculation. This is caused from lateral drilling.Clear the hole bottom. In particular, for slant hole, the hole bottom must be very “clean” ,since the cuttings packed and deposited in the bottom affect the torque or deflection. It is best to clean it with normal recycling . While cleaning, slowly turn the screw drill or turn it by times(turning 30176。 40176。 each time), gradually to clean up the bottom. Then lift screw drill for , calibrate and record the pressure value. Gradually enhance drilling weight when tripping into the bottom again. Meanwhile, motor torque increase, riser pressure on gauge increases ,too. The pressure value should conform with the motor pressure loss specified for any type of screw drill. The increased value on the gauge indicates motor load is normal or not, and also shows the added weight is appropriate or not. Therefore, motor torque and drilling weight shall be kept stable only by limiting the riser gauge reading to the remended range. This makes drillers know screw drill operation timely.When the bit is not in the bottom , if recycling pressure is lower than the calculated value, it is possible that bypass valve locates in “open” position, or it is caused by drill pipe damage or well leakage etc.If recycling pressure is higher than the calculated value ,and the factor of pressure rise caused in reentry is eliminated, but it is still over the calculated value, possibly the bit nozzle is plugged or drive shaft is sticked .Now recycling pressure is much higher than the calculated value. Trip Out: Screw drill tripping out is similar to the conventional tripout. Bypass valve is in open在井內(nèi)，鉆井液若不能迅速通過(guò)旁通閥閥口，進(jìn)鉆柱中，應(yīng)減慢下井速度，或不時(shí)停下來(lái)充灌泥漿，下鉆時(shí)，注意不可墩鉆或?qū)@具直接放進(jìn)井底。6．3開動(dòng)鉆具：如果鉆具處于井底，開動(dòng)鉆井泵此時(shí)記下立桿壓力表讀數(shù)，與計(jì)算的壓力值對(duì)比一下，如果超過(guò)水力計(jì)算的壓力數(shù)值也是正常的，這是鉆頭側(cè)鉆引起的。清理井底，尤其是打斜井，井底必須足夠“干凈”，因?yàn)榫锥逊e或沉淀的巖屑影響轉(zhuǎn)速或造斜。最好用正常的鉆井液循環(huán)清理，清理時(shí)也可慢慢轉(zhuǎn)動(dòng)鉆具或鉆具分次轉(zhuǎn)動(dòng)（每次轉(zhuǎn)動(dòng)30~40），依次地把堆在井底的物體清理干凈。清理干凈后，，校對(duì)壓力值，記錄下來(lái)。從新下入井底并逐步加井壓，馬達(dá)扭矩增加，立桿壓力表壓值升高，這個(gè)升高的壓力值應(yīng)符合各型號(hào)鉆具規(guī)定的馬達(dá)壓降值，此壓力表增大的數(shù)值反映了馬達(dá)的負(fù)載是否正常，也反映鉆壓加的是否合適，因此保持馬達(dá)轉(zhuǎn)距基本穩(wěn)定，鉆壓基本穩(wěn)定，只要把立桿壓力表讀數(shù)限制在所選鉆具推浮范圍內(nèi)就可以了。它能使司鉆及時(shí)了解鉆具工作情況。鉆頭不在井底時(shí)，如果循環(huán)壓力低于計(jì)算值，可能是旁通閥處與“開位”或鉆桿損壞，井漏等造成的。如果循環(huán)壓力高于計(jì)算值，而且側(cè)鉆造成壓力升高的因素已排除，循環(huán)壓力仍高于計(jì)算值，則可能是鉆頭水眼被堵或轉(zhuǎn)動(dòng)軸被卡死，此時(shí)循環(huán)壓力要比計(jì)算壓力高得多。：鉆具起鉆過(guò)程類似常規(guī)操作。起鉆時(shí)，旁通閥處于開位，允許鉆柱中的鉆井液瀉入環(huán)空。但是鉆具本身不能排出鉆井液，通常在起鉆前在鉆柱上部注入一段加重鉆井液順利排出。，卸下旁通閥口上各部件，先用清水從旁通閥頂部進(jìn)行沖洗，然后使用木棒或錘柄等將閥芯按下、松開使其移動(dòng)無(wú)阻。清洗完畢，擰上提升短節(jié)，提出鉆具。6．4．2裝好鉆頭裝卸器，卡牢鉆具外殼，反轉(zhuǎn)鉆頭（俯視反旋）把馬達(dá)中殘存的泥漿從旁通閥排出，卸下鉆頭。6．4．3卸下鉆具，從傳動(dòng)軸孔中沖洗鉆頭，將轉(zhuǎn)動(dòng)軸水帽及軸承清洗干凈，然后平放鉆具，正常維護(hù)保養(yǎng)待用。若暫停使用或長(zhǎng)時(shí)間擱置不用，建議向鉆具內(nèi)注入少量礦物油防銹（注：不允許加入柴油）。6．5用鉆具井的故障分析： 如前所述，鉆井液循環(huán)壓力變化反映在立桿壓力表上，它可以幫助現(xiàn)場(chǎng)人員辯別井底發(fā)生的情況和問(wèn)題，事實(shí)證明：正確的判斷可以節(jié)省大量起下鉆所耗費(fèi)的時(shí)間和成本。綜合考慮鉆具使用過(guò)程中的各種因素，歸納為表2。供用戶參考。position in stripping out. The fluid in string is allowed to be drained into annular space. But screw drill can not rapidly discharge the fluid by itself. Usually a section of heavy fluid is added into the top of string before stripping out, to press the fluid in the pipe smoothly to drain. After screw drill is stripped out to the location of bypass valve, disassembly the parts on the top of valve holes. Firstly wash it from the valve top with clean water, and then press down the valve stem with hammer handle or wood stick, loosen it for free movement. As soon as cleaning is pleted, twist lifting nipple and trip out the screw drill. Install the bit assembly and disassembly device to clamp the