METHOD OF LOCATING HYDROPHONES
    92.
    发明专利

    公开(公告)号:CA2256964C

    公开(公告)日:2007-09-25

    申请号:CA2256964

    申请日:1998-12-23

    Abstract: A method of computing the location of air guns and hydrophones within a seismic spread utilizes a navigation network having a plurality of stations. The network provides a plurality of navigation observations. A number of the observations consist of magnetic bearings which are used to derive the hydrophone locations. The method includes the steps of: a) obtaining a set of observations from the network, each observation being obtained by using navigation devices whose origin system moves independent of the navigation reference point; and b) forming a design matrix wherein the magnetic bearings are modeled based on the equation (I). (see formula I)

    APPARATUS AND METHOD FOR PLANTING SEISMIC SENSORS

    公开(公告)号:CA2330456C

    公开(公告)日:2007-07-17

    申请号:CA2330456

    申请日:1999-04-28

    Inventor: CHIEN LORING

    Abstract: An apparatus and method are provided for ensuring good coupling and vertically planting (12) of seis-mic receivers while substantially reducing the need for interconnecting wires and costly surveys. The appara-tus includes an acquisition unit (AU) (20) for measuring seismic energy and a planting member (12) for engag-ing and planting the AU (20). An electronic surveying instrument (14) is coupled to the planting member (12) for determining the location of the AU (20). An installer (16) plants the AU (20) in the terrain (22) in near vertical alignment using the planting member (12). Once the AU (20) is planted in near vertical alignment, coordinates are downloaded from the electronic survey unit to locate the planted AU (20).

    97.
    发明专利
    未知

    公开(公告)号:DE69834449D1

    公开(公告)日:2006-06-14

    申请号:DE69834449

    申请日:1998-01-29

    Inventor: WOOD RICHARD G

    Abstract: A static seal assembly (10) comprises an underwater cable (12) having: (a) an outer jacket (14); (b) a metal housing (16) provided with annular grooves (26) containing O-rings (28) or similar seal members, encompassed by a rigid shell (30); and overmoulded by (c) a cover (34), which also has an integral shoulder (38) formed during moulding to fill an annular groove (36) provided in the metal housing (16) for that purpose. The rigid shell (30) is formed of glass-filled polyurethane having a flexural modulus of about 650,000 psi, a surface hardness of about 80 D, and a thickness of 0.15-0.20 inches. The material is self-bonding with the overmoulded cover (34), which is also composed of polyurethane, as is the outer jacket (14). Alternatively, the rigid shell (30), overmoulded cover (34), and cable jacket (14) are all formed of polyethylene or nylon.

    99.
    发明专利
    未知

    公开(公告)号:NO20044420L

    公开(公告)日:2004-10-19

    申请号:NO20044420

    申请日:2004-10-19

    Abstract: The present invention provides an adaptive filtering method for substantially eliminating ground roll noise encountered during seismic data acquisition. An apparatus for acquiring seismic data is provided that includes an adaptive filtering circuit coupled to a multi-axis sensor device.

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