Sucker rod guide

1. A sucker rod guide for use in a well production tubing, the sucker rod guide comprising:

(a) a sleeve member, including a first material having a first wear characteristic and including:

(i) a passage therethrough for a sucker rod; and

ii) an outer surface; and

(b) a wear member overlaying the sleeve member and including a second material having a second wear characteristic, the wear member being fixed in position relative to the sleeve member by a first fixing means, the sleeve member including:

(i) an inner surface; and

(ii) an outer surface defining a flow path for a fluid, when in use, between the sucker rod guide and the well production tubing; and

wherein the sleeve member has a higher stiffness than the wear member.

2. The sucker rod guide according to claim 1 , wherein the first fixing means comprises a male member and a female member that are compatible insofar as they are adapted to form a friction fit or to otherwise lock together to prevent the relative movement of the wear member and the sleeve member.

3. The sucker rod guide according to claim 2 , wherein the male member projects from the outer surface of the sleeve member and the female member is formed on the inner surface of the wear member.

4. The sucker rod guide according to claim 3 , wherein the male member has a first end and a second end and extends lengthwise along the outer surface of the sleeve member between said ends to define a first path.

5. The sucker rod guide according to claim 4 , wherein the first path is a spiral or a helix.

6. The sucker rod guide according to claim 1 , wherein the first wear characteristic comprises a lower wear resistance than the wear member.

7. The sucker rod guide according to claim 1 , wherein the wear member is more wear resistant than the sleeve member.

8. The sucker rod guide according to claim 1 , wherein the wear member further comprises a fluid flow enhancer.

9. The sucker rod guide according to claim 1 , further comprising a retaining means for a performance monitor component.

10. The sucker rod guide according to claim 1 , further comprising a performance monitor component.

11. The sucker rod guide according to claim 10 , wherein the performance monitor component comprises a detectable material.

12. A method for manufacturing a sucker rod guide, the method comprising the steps of:

(a) providing a sleeve member, including a first material having a first wear characteristic and including a passage therethrough for a sucker rod and an outer surface; and

(b) forming a wear member over the sleeve member such that it is fixed in position relative to the sleeve member;

wherein the wear member comprises a second material having a second wear characteristic and the sleeve member has a higher stiffness than the wear member.

13. The method according to claim 12 , wherein the step of forming a wear member over the sleeve member comprises moulding.

14. A method for manufacturing a sucker rod guide, the method comprising the steps of:

(a) providing a sucker rod;

(b) fixing a sleeve member to the sucker rod wherein the sleeve member includes a first material having a first wear characteristic, a passage therethrough for the sucker rod and an outer surface; and

(c) forming a wear member over the sleeve member such that it is fixed in position relative to the sleeve member, wherein the wear member comprises a second material having a second wear characteristic, the sleeve member having a higher stiffness than the wear member, and wherein the sleeve member and the wear member together form a sucker rod guide.

15. The method according to claim 14 , wherein the step of fixing a sleeve member to the sucker rod comprises moulding.

16. The method according to claim 14 , further comprising the step of locating a retaining means for a performance monitor component on the sleeve member prior to the step of forming a wear member.

17. The sucker rod guide according to claim 11 , wherein the performance monitor component is configured to release the detectable material when wear of the sucker rod guide breaches a part of said retaining means and the detectable material is released therefrom or is otherwise detectable.

18. The sucker rod guide according to claim 11 , wherein the detectable material is selected from a group consisting of: a coloured material, a fluorescent material, a radioactive material, fluorescein, 1,3,6,8 pyrenetetrasulfonic acid, sodium salt, rhodamine, alexa, and eFlour.

19. The sucker rod guide according to claim 1 , wherein the sleeve member comprises a stiffness of at least 9-20, 10-15, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19 or 20 GPa.

20. A sucker rod comprising the sucker rod guide according to claim 1 .