Ｅ、抽油桿扶正器E, sucker rod centralizer抽油桿扶正器由心軸和扶正筒組成，它接在兩根抽油桿之間，被卡在兩個(gè)抽油桿接箍之間。心軸也就是一要極短的抽油桿短節(jié)。扶正筒是一個(gè)內(nèi)孔比心軸大１ＭＭ左右的空心塑料筒，外部有四個(gè)略比油管內(nèi)徑小的扶正翼，采取澆注成型。扶正筒可以圍繞心軸轉(zhuǎn)動(dòng)，防止抽油桿旋轉(zhuǎn)時(shí)與內(nèi)壁接觸而磨蝕油管，又可以讓流體通過。The sucker rod centralizer is comed of the heart shaft and the upright cylinder, which is connected between the two sucker rods and is stuck between the two sucker rod hoops. The axis of the heart is also an extremely short rod short section. The centering cylinder is a hollow plastic tube inner hole Bixin shaft around 1MM, external four slightly smaller than the diameter of the tubing centralizer wing, adopt casting. The centralizer can revolve around the axis to prevent the sucker rod from touching the inner wall when it rotates, and it can also let the fluid pass through.



Ｆ、抽油桿F, sucker rod所使用的抽油桿是常用的普通抽油桿、空心抽油桿和連續(xù)抽油桿，可根據(jù)油井確定。The sucker rod used is commonly used as a common 1sucker rod, hollow sucker rod and continuous sucker rod, which can be determined according to the oil well.Ｇ、定子扶正器G, stator centralizer定子扶正器為有一定彈性的籠形裝罩，每一對(duì)由兩半構(gòu)成，中間大、兩端小。作用是使定子居中和減小定子的擺動(dòng)。The stator centralizer is a cage shaped cover with a certain elasticity. Each pair is made up of two halves, large in the middle and small at both ends. The function is to make the stator middle and reduce the stator wobble.Ｈ、錨定裝置H, anchoring device對(duì)于沒有封隔器的井和泵掛深度淺的井，用于固定定子、消除擺動(dòng)和防止定子脫扣。采用普通的錨定裝置即可。For wells without packers and shallow wells with deep pumps, it is used to fix the stator, eliminate the swinging and prevent the tripping of the stator. A common anchoring device can be used.

　單螺桿泵有以下優(yōu)點(diǎn)：

　　1)因?yàn)楸脙?nèi)的回轉(zhuǎn)部件慣性力較低，故可使用很高的轉(zhuǎn)速;

　　2)結(jié)構(gòu)堅(jiān)實(shí)，安裝保養(yǎng)容易;

　　3)單螺桿泵的壓力和流量范圍寬闊。壓力約在3.4-340千克力/cm2，流量可達(dá)18600cm3/分;

　　4)單螺桿泵的吸入性能好，具有自吸能力;

　　5)與其它回轉(zhuǎn)泵相比，對(duì)進(jìn)入的氣體和污物不太敏感;

　　6)流量均勻連續(xù)，振動(dòng)小，噪音低;

　　7)單螺桿泵的運(yùn)送液體的種類和粘度范圍寬廣。

　　單螺桿泵的缺點(diǎn)是，螺桿的加工和裝配要求較高;泵的性能對(duì)液體的粘度變化比較敏感。