公开(公告)号：US3802502A

公开(公告)日：1974-04-09

申请号：US36111173

申请日：1973-05-17

Applicant: WESTON INSTRUMENTS INC

Inventor： TANGUY D ,  KISHEL J

IPC: E21B21/08 ,  E21B49/00 ,  E21B27/00 ,  E21B47/00

CPC classification number: E21B47/10 ,  E21B21/08 ,  E21B49/005

Abstract: In the representative embodiments of the apparatus of the present invention disclosed herein, one or more unique sampling devices are arranged between the upper and lower telescoping members of a typical slip joint which is tandemly connected in the drill string preferably a short distance above the drill bit. Each of these fluid samplers includes telescoping piston and chamber members defining an enclosed sample chamber which is expanded in response to extension of the slip joint members. Valve means are cooperatively arranged with each of the sampling devices for admitting a predetermined volume of drilling mud into the sample chamber each time the slip joint is extended. By moving the drill string so as to expand the sampling chamber, the pressure of the entrapped sample is reduced to at least the saturation pressure of a gas-containing drilling mud at the borehole ambient temperature. By measuring the force required to expand the sampling chamber, the presence or absence of formation gas in the drilling fluid can be determined; and, if desired, these force measurements may be used to derive quantitative measurements which are representative of the percentage of gas entrained in the discrete sample.

Abstract translation: 在本文公开的本发明的装置的代表性实施例中，一个或多个独特的采样装置布置在典型的滑动接头的上部和下部伸缩构件之间，该滑动接头在钻柱中串联连接，优选地在钻头上方短距离 。 这些流体采样器中的每一个包括伸缩的活塞和室构件，其限定封闭的样品室，其响应于滑动接头构件的延伸而膨胀。 阀装置与每个采样装置配合布置，用于每当滑动接头延伸时，将预定体积的钻井泥浆进入样品室。 通过移动钻柱以使样品室膨胀，在钻孔环境温度下，夹带的样品的压力至少降低至含气体钻井泥浆的饱和压力。 通过测量膨胀采样室所需的力，可以确定钻井液中是否存在地层气体; 并且如果需要，这些力测量可以用于导出代表在离散样品中夹带的气体的百分比的定量测量。