【正文】 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。在鉆井液不斷循環(huán)過(guò)程中，由于鉆井液本身的摩擦和鉆井液與 管壁、 rate. It is advised to choose the range according to the remended parameters. Otherwise, it may shorten the screw drill’s working efficiency and running life. Features of Drilling Fluid and Drilling Weight: When screw drill is in idle working condition, if keeping fluid flow rate unchanged, the pressure loss caused by both bit and screw drill shall be a constant value. This value changes with the difference of drill model and specification. As screw drill is running, fluid recycling pressure will gradually increase with gradual rise of drilling weight. The increment of pressure is proportional to the torque increment needed by drilling weight and stripping in. When it reaches the maximum remended value, optimum torque shall be produced. If drilling weight goes on rising, when the pressure loss of recycling fluid at both ends of motor is over maximum design value, leakage shall occur from the screw drill. In normal operation, the gauge pressure rises with the drilling weight up and down. If the gauge shows sudden rise of temperature to several Mpa, when the drilling weight goes on increasing, pump pressure shall no longer increase. This indicates there occurs some leakage from screw drill. The seal between stator and rotor may be changed, and fluid may be flowing out from bit nozzle while going through the damaged seal cavity. When it is sticking due to this problem, fluid is still recycling through screw drill since screw drill braking. Once screw drill brakes, it shall be quickly lifted away from the hole bottom to reduce drilling weight, since screw drill may be seriously damaged with fluid flowing through the idle motor for longer time. Additionally, the pressure loss at the bottom ends of screw drill shall be controlled within the remended range, to ensure screw drill in optimum working efficiency and running life. Early Hydraulic Calculation: In drilling operation, the pumped mud flows successively through riser, swivel, kelly into drill pipe, collar, nonmagic collar, motor ,bit nozzle and annular space, and upwards to the surface. During recycling, the loss caused from the friction of fluid its own and the friction of fluid onto the pipe wall, hole wall and/or partial flow will consume a certain energy. 上海奧森油田服務(wù)有限 公司 Shanghai Ocean Oilfield Service Co. Downhole Motor 11 井壁的摩擦及各局部流動(dòng)造成的損失，皆需消耗一定的能量。C, screw drill shall be working in optimum condition. When temperature is over 150176。在較長(zhǎng)周期的鉆井作業(yè)中，最重要的因素就是鉆頭與鉆具作為一個(gè) 整體，不要由于其中的哪一部分出了問(wèn)題，而造成不必要的起下鉆。 BH is Bo Hai 5. Application Notices Site drilling technical persons and drillers shall know well screw drill structure principle and technical parameters, correctly apply screw drill in accordance with requirements specified in this manual. Drilling engineer shall make operation program upon the whole hole, and select the model of screw drill and bit to be used , determine nozzle size and screw drill bination according to formation edge structure, hole size, depth and mechanical speed . The determined drilling program shall be strictly carried out accordingly on the location. Drilling Fluid Requirement: Screw drill motor shall be volumetric. The key factor to screw drill property is motor inlet flow rate, and the pressure loss functioning onto both ends. But it is not the kind of drilling fluid. Physical and chemical property of drilling fluid, except the individual damage to screw drill running life, normally does not affect its property. 上海奧森油田服務(wù)有限 公司 Shanghai Ocean Oilfield Service Co. Downhole Motor 8 工藝的需要。渤海啟明鉆具的瓣型萬(wàn)向軸采用線切割技術(shù)制成，切口平行度高，粗糙度可達(dá) 且不破壞金屬化學(xué)成分，因此使用壽命高、機(jī)械損失?。ㄈ鐖D 4）。壓降超過(guò)此值馬達(dá)就會(huì)產(chǎn)生泄漏，轉(zhuǎn)速很快下降，嚴(yán)重時(shí)會(huì)完全停止轉(zhuǎn)動(dòng)，甚至造成馬達(dá)損壞，用戶應(yīng)特別注意。泥漿泵泵出的泥漿液流經(jīng)旁通閥進(jìn)入馬達(dá)，在馬達(dá)進(jìn)出口處形成一定壓差推動(dòng)馬達(dá)的轉(zhuǎn)子旋轉(zhuǎn)，并將扭矩和轉(zhuǎn)速通過(guò)萬(wàn)向軸和傳動(dòng)軸傳遞給鉆頭。 轉(zhuǎn) 子與定子相互嚙合，是用兩者的導(dǎo)程差而形成的螺旋密封線，同時(shí)形成密封腔。鉆頭離開(kāi)井底，馬達(dá)負(fù)載近似為零，此時(shí)流經(jīng)轉(zhuǎn)子噴咀流量最小，而流經(jīng)馬達(dá)密封腔的流量最大。 5． 2 根據(jù)整個(gè)井眼的鉆井作業(yè)計(jì)劃，由鉆井工程師根據(jù)任務(wù)結(jié)合地層結(jié)構(gòu)、井眼孔徑、深度、機(jī)械轉(zhuǎn)速選定所用鉆頭與鉆具型號(hào)，決定水眼直徑和鉆具組合。 B：牙輪鉆頭：這類鉆頭在螺桿鉆具配合使用時(shí)，更實(shí)用于鉆井周期不長(zhǎng)的作業(yè)，如定向造斜、 側(cè)鉆等。 為使鉆具在較高的油基鉆井液下正常工作，可以采用分段下鉆，間歇循環(huán)，使用帶分流孔的空心轉(zhuǎn)子，以加速循環(huán)或改善鉆井液的散熱性及其它性能的方法。繼續(xù)增加鉆壓，當(dāng)循環(huán)鉆井液在馬達(dá)兩端產(chǎn)生的壓降超過(guò)最大設(shè)計(jì)值時(shí)，鉆具將發(fā)生泄漏。 6． 1． 4 檢查旁通閥：用錘柄或木棒向下壓旁通閥芯，從上部向旁通閥注滿水，此時(shí)旁通閥應(yīng)不漏，水面無(wú)明顯下降，然后挪走木棒，閥芯應(yīng)被彈簧彈 起復(fù)位，所注水應(yīng)從側(cè)面各孔均勻流出，即可認(rèn)為正常。 There should be no fluid flowing out of bypass hole. To do this is only for checking bit rotation. It should not last longer. In the operation, it should prevent the bit from touching wellhead blowout preventer and flow line. After pump stops, check bypass valve in open position or not, and fluid flowing out of bypass valve or not. Do not lift the valve over turntable until pump pletely stops as to protect the platform from pollution 6． Disassembly kelly and bine the screw drill in accordance with the program. Connect bent sub, nonmagic collar and stabilizer etc. separately . If you make deflection with muleshoe, before twisting bent sub into bypass valve, you should examine deflecting key to ensure muleshoe sitting in normal working 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 oppo