| 摘要 |
<p>WELL TEST APPARATUS A well test apparatus in which a by-pass sleeve valve lands in a previously set packer. A lock mandrel assembly lands in the sleeve valve and carries a transducer fitting. A transducer is releasably carried in the fitting. Well conditions such as pressure may be sensed by the transducer and recorded or transmitted to the surface. By manipulation of casing pressure, the by-pass valve may be opened and closed to flow the well at high production rates with the transducer in place. This invention relates to apparatus for testing a petroleum well. During a well test program it is desirable to be able to determine at the bottom of the well certain well conditions such as pressure, temperature and the like, and the present state of the art provides this function with a transducer, which may be run into the well and record conditions adjacent the producing formation. See United States Patents to Kingelin, No. 4,051,897 and No. 4,134,452. It is also known to provide with a bottom hole pressure system provisions for flowing the well at high rates to provide further test data. These past systems have provided manipulation of the tubing, complex motors run on testing tools and the like. It is desirable in conjunction with a testing procedure to provide for shutting in the well adjacent to the producing formation to obtain information and it is also desirable to flow the well to obtain information and it is also desirable to flow the well to obtain additional information. For this latter purpose, a simple apparatus which may be provided as a part of the tubing string and controlled by varying annulus pressure is needed. The apparatus should provide for flow around the sensing device at the desired rates for test purposes and should provide a full open bore to permit the apparatus to be left in the well as a part of the tubing string after the test procedures have been carried out if the operator so desires. It is an object of this invention to provide a by-pass valve apparatus which may be run on a tubing string as a part thereof, which may sealingly engage a packer, which provides for landing of a transducer and shutting in of the well adjacent the packer to obtain well information such as pressures, together with the ability to by-pass the pressure sensing device to provide for flow from the well at high rates. Another object is to provide a by-pass valve having a seal area for sealingly receiving equipment to determine conditions in the bottom of the well and providing by-pass passageways around this seal area which are controlled by a valve responsive to changes in casing-tubing annulus pressure. Other objects, features and advantages of the invention will be apparent from the drawing, the specification and the claims.</p> |
