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US 5,314,209 AGranted
Blast joint for snubbing unit
AssigneeVermont American Corporation
InventorKarl F. Kuhne
Life of this patent
Estimating the term…
Abstract
A blast joint for use with a snubbing unit includes a casing around the protective rings and means for sealing around the bottom of the rings between the tubing and the casing.
Claims15
A blast joint for sealing a casing, comprising:
- at least one tubing member;
- a plurality of wear-resistant rings concentrically located around said tubing member, said rings abutting each other;
- an upper outer casing surrounding at least some of the rings;
- a lower outer casing surrounding at least some of the rings;
- and,
- a substantially cylindrical adapter for providing a seal between said upper and lower outer casings comprising:
- a) a collar member concentric with and removably attachable to said lower outer casing, said collar member having threads at its upper end and an inner shoulder;
- b) means for attaching said collar member to said lower outer casing;
- c) a compression member concentric with said upper outer casings, said compression member having and inner shoulder and threads at its lower end;
- d) a central member concentric with said upper and lower outer casings, said central member having outer threads for threadably engaging said collar member and said compression member;
- and
- means for sealing interposed between said inner shoulder of said collar member and the end of said central member, and interposed between the end of said central member and the inner shoulder of said compression member;
- whereby urging of said collar and said compression member into threaded engagement with said central member compresses said means for sealing interposed thereinbetween, forming an airtight and pressure tight seal between said lower casing and said upper casing.
10 more elements
A blast joint comprising:
- a tubing member;
- a plurality of wear-resistant rings concentrically positioned around said tubing member, said rings abutting each other;
- an outer casing surrounding at least some of said rings;
- and,
- means for sealing between said tube and said outer casing and for supporting said rings, said means for sealing between said tube and said outer casing and for supporting said rings including:
- a) a collar member concentric with and removably attachable to said tubing member, said collar member having threads at its upper end defining an inner shoulder;
- b) means for removably attaching said collar member to said tubing member;
- c) a compression member concentric with said outer casing, said compression member having an inner shoulder and threads at its lower end;
- d) a central member concentric with said tubing member, said central member defining a shoulder for supporting said rings and abutting said casing and having outer threads for threadably engaging said collar member and said compression member;
- and,
- e) means for sealing interposed between said inner shoulder of said collar member and said central member, and interposed between said central member and said inner shoulder of said compression member;
- whereby urging of said collar member and said compression member into threaded engagement with said central member compresses said means for sealing interposed thereinbetween, forming an airtight and pressure tight seal between said tubing member and said outer casing.
9 more elements
A blast joint for insertion through a snubbing unit comprising:
- a) at least one lower tubing member;
- b) at least one upper tubing member;
- c) a plurality of wear-resistant rings concentrically located around said upper tubing member, said rings abutting each other;
- d) an outer casing surrounding said rings, said outer casing defining inner threads at its upper end;
- e) a first sealing means for creating a pressure tight seal between said lower tubing member and said outer casing comprising a substantially cylindrical first adapter having a generally cylindrical shape, said adapter defining a threaded surface at its bottom end for sealably engaging said lower tubing member, defining inner threads and outer threads at its upper end, said inner threads sealingly engaging said upper tubing member, and said outer threads sealingly engaging said outer casing, said first adapter supporting said rings between said upper tubing member and said casing;
- and
- f) a second sealing means for creating a pressure tight seal between said upper tubing member and said outer casing, comprising:
- i) a second adapter concentric with said upper tubing member defining inner threads at its upper end, and inner shoulder, and outer threads at its lower end for threadably engaging said inner threads of said outer casing;
- ii) a compression member concentric with said upper tubing member defining outer threads for threadably engaging said inner threads of said second adapter;
- and
- iii) means for sealing interposed between said second adapter and said compression member, whereby urging of said second adapter into threaded engagement with said compression member compresses said means for sealing interposed thereinbetween forming an airtight and pressure tight seal.
8 more elements
Dependencies are inferred from the claim text.