| 摘要 |
An adapter usable for interconnection of a pair of drill components according to the invention includes an elongated adapter body having a first end and a second end, wherein the first end includes one of (1) a tubular wall defining a socket that opens outwardly at one end of the adapter and having at least one transverse opening therethrough configured to receive a removable retainer for mechanically interlocking a projection in the socket, and (2) the projection which fits into the socket, which projection has at least one transverse opening therein to receive the removable retainer. The second end includes a connecting portion different from the projection and the tubular wall defining the socket, such as a threaded projection or recess. The adapter preferably has a lengthwise fluid passage through it suitable for passing lubricating drilling fluid through the adapter to a drill head or back reamer. The socket (1) of the first end preferably has a series of spaced splines arranged in an arcuate formation around the socket, which splines extend in a lengthwise direction of the adapter and can engage a series of grooves in an adjoining component in a manner effective to prevent relative rotation between the adapter and an adjoining component. If splines are used in this manner, complementary splines and grooves are also formed on the projection (2) if the first end is male. An adapter of this kind can be used to interconnect a component having a pinned, projection and socket connector with another type of connector that is less easy to couple and uncouple manually, such as an API threaded connection.
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