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4589 results about "Open hole" patented technology

Coiled tubing clamping device and injection head using same

A coiled tubing clamping mechanism comprises a saddle-shaped clamping block (1) and a clamping block seat (4). The saddle-shaped clamping block (1) is connected to the clamping block seat (4). Two sides of the saddle-shaped clamping block (1) are provided with a tongue platform (102). The tongue platform (102) is provided with an open hole (103). The back of the saddle-shaped clamping block (1) is provided with a groove (104). Two sides of the clamping block seat (4) are provided with a pair of bosses (406) respectively. The groove (104) of the saddle-shaped clamping block (1) is inserted in a holding slot (405) formed by the bosses (406) of the clamping block seat. A traverse gap is kept between the groove (104) and the holding slot (405). The clamping block seat (4) is provided with a positioning screw (2) for limiting the position of the saddle-shaped clamping block (1). Also disclosed is an injector head using the coiled tubing clamping mechanism, comprising a tubing clamping mechanism (11) and a drive chain (13). The tubing clamping mechanism (11) is mounted on the drive chain (13) through two pin holes (401) in the clamping block seat (4). The present invention can effectively prevent the tubing from being worn, is reliable in use, and makes it convenient to replace the clamping block.
Owner:YANTAI JEREH OILFIELD SERVICES GROUP +1

Measurement while drilling bi-directional pulser operating in a near laminar annular flow channel

A device, method, and system for creating a pressure pulse from drilling fluid within a drill string in a down hole drill collar for enabling measurement-while drilling. The device and system are designed such that primarily laminar flow exists in the area surrounding the pulser apparatus. The method associated with the reproducible and essentially noise-free pulses occurs when a pulser bell is manipulated in an upward and downward direction by a combination of the solenoid activation of a bi-directional poppet to redirect the fluid flow from the pressure reservoir to and from a sliding pressure chamber and associated upper and lower flow connecting channels. The pulse or non-pulse is converted into a digital signal uphole by a pressure transducer in conjunction with a decoding algorithm. It is then displayed to the driller and oilfield operators as useful directional and formation information that help the oilfield operator for uphole decision making regarding directional drilling. Additional pulsers can be added to the tool so that higher data bit rates can be accomplished. These higher data bit rates will provide for more comprehensive data collection thereby reducing drilling costs and optimizing oil field yields. The higher bit rate allows for more sensors that can send additional and improved information uphole without the use of open hole wire line logging which is impossible to accommodate while drilling horizontally.
Owner:TELEDRILL
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