Apparatus for, and method of, landing items at a well location
View Patent ↗An apparatus for, and method of, lowering items from a drilling rig to a well located below it through the use of a landing string comprised of drill pipe having an enlarged diameter section with a shoulder, in combination with upper and lower holders having wedge members with shoulders that engage and support the drill pipe at the shoulder of the enlarged diameter section, the shoulder of the drill pipe and the shoulders of the wedge members being rotatable with respect to each other.
1. A method of landing items at a well location, comprising the steps of:
a) positioning a drilling rig above a well location, the drilling rig having a landing string that is comprised of a number of joints of drill pipe, and a holder that holds a joint of drill pipe in the landing string for supporting the landing string;
b) attaching an item to the lower end of the landing string and lowering the landing string such that it spans the distance between the drilling rig and the well location;
c) wherein the holder, and the joint of drill pipe that is held by the holder, are configured to support the tensile load of the landing string with correspondingly shaped shoulders that engage when the holder holds the joint of drill pipe;
d) wherein the shoulder of a plurality of the joints of drill pipe have an angle of taper greater than about 45 degrees, wherein the shoulders are rotatable with respect to each other regardless of the distance between said shoulders.
2. The method of claim 1 , wherein in step “d” the angle of taper is between about 47 and about 63 degrees.
3. The method of claim 1 , wherein in step “d” the angle of taper is between about 49 and about 61 degrees.
4. The method of claim 1 , wherein in step “d” the angle of taper is between about 51 and about 59 degrees.
5. The method of claim 1 , wherein in step “d” the angle of taper is between about 53 and about 57 degrees.
6. The method of claim 1 , wherein in step “d” the angle of taper is about 55 degrees.
7. A method of well casing placement comprising the steps of:
a) positioning a drilling rig above a well location, the drilling rig having a landing string that is comprised of a number of joints of drill pipe, and a holder that holds a joint of drill pipe in the landing string for supporting the landing string;
b) lowering a plurality of connected joints of casing to the well, said plurality of connected joints of casing defining a casing string, the casing string being supported by the landing string;
c) configuring the combination of landing string and casing string so that the overall combined length of the landing string and casing string spans the distance between the drilling rig and the well location;
d) wherein the holder, and the joint of drill pipe that is held by the holder, are configured to support the tensile load of step “c” with correspondingly shaped frustoconical shoulders that engage when the holder holds the joint of drill pipe, said shoulders having an angle of taper greater than about 45 degrees; and
e) wherein the joint of drill pipe that is held by the holder includes a plurality of separate drill pipes that are mated together end to end.
8. The method of claim 7 , wherein in step “d” the angle of taper is between about 47 and about 63 degrees.
9. The method of claim 7 , wherein in step “d” the angle of taper is between about 49 and about 61 degrees.
10. The method of claim 7 , wherein in step “d” the angle of taper is between about 51 and about 59 degrees.
11. The method of claim 7 , wherein in step “d” the angle of taper is between about 53 and about 57 degrees.
12. The method of claim 7 , wherein in step “d” the angle of taper is about 55 degrees.
13. A drilling rig, pipe and pipe handling apparatus, comprising:
a) a drilling rig with a floor;
b) a landing string comprised of a number of joints of pipe connected end to end at the floor, at least a plurality of the joints of pipe having an enlarged diameter section with a shoulder that is spaced apart from either end of the pipe;
c) first and second holders that provide support for the tensile loaded landing string;
d) wherein the first holder is a lower holder positioned near the rig floor that holds a joint of pipe of the landing string and supports the landing string during the addition or removal of a joint of pipe to or from the landing string, and the second holder is an upper holder that holds a joint of pipe in the landing string and supports the landing string after a joint of pipe has been added to or removed from the landing string;
e) each of the holders including a main body and a plurality of wedge members, the wedge members forming an interface between the body and the joint of pipe being held by the holder, each wedge member having a shoulder that corresponds in shape to and engages with the shoulder at the enlarged diameter section of the joint of pipe being held by one of the holders;
f) wherein the shoulders are rotatable with respect to each other, regardless of the distance between said shoulders; and
g) wherein the joint of pipe being held by one of the holders includes separate pipes mated together end to end, the mated ends of said separate pipes forming the enlarged diameter section of the joint of pipe being held; and
h) wherein the angle of taper of a plurality ofjoints of drill pipe is greater than about 45 degrees.
14. The method of claim 13 , wherein in step “d” the angle of taper is between about 47 and about 63 degrees.
15. The method of claim 13 , wherein in step “d” the angle of taper is between about 49 and about 61 degrees.
16. The method of claim 13 , wherein in step “d” the angle of taper is between about 51 and about 59 degrees.
17. The method of claim 13 , wherein in step “d” the angle of taper is between about 53 and about 57 degrees.
18. The method of claim 13 , wherein in step “d” the angle of taper is about 55 degrees.