A drill rod for assembly with other drill rods to form a drillstring used for fluid reverse circulation drilling comprising: an outer drill rod comprising a lightweight drill rod used in core drilling with a bore, an inner drill rod comprising a bore, a first coupling member removably coupled to one end of the inner drill rod, a second coupling member removably coupled to a second end of the inner drill rod, wherein the first and second coupling members centre the inner drill rod within the outer drill rod.

A drill rod for assembly with other drill rods to form a drillstring used for fluid reverse circulation drilling comprising: an outer drill rod comprising a lightweight drill rod used in core drilling with a bore, an inner drill rod comprising a bore, a first coupling member removably coupled to one end of the inner drill rod, a second coupling member removably coupled to a second end of the inner drill rod, wherein the first and second coupling members centre the inner drill rod within the outer drill rod.

The present application pertains to a swivel insertable into a casing ram. The swivel comprises an inner mandrel having an upper end section and a lower end section configured to be operably connectable and rotatable with an upper workstring section and a lower workstring section, the inner mandrel comprising a longitudinal passage forming a continuation of a passage in the workstring. An outer housing is configured to seal the inner mandrel inside the outer housing. The outer diameter of the outer housing and the length of the outer housing is configured to fit a casing ram. In contrast to prior art tools placed within annular blowout preventers which have limited differential pressure ranges, the instant device allows for differential pressure during operation as high as 10,000 psi or more. The instant devices also may allow for aggressive frac pack treatments and facilitate reverse out operations.

The present application pertains to a swivel insertable into a casing ram. The swivel comprises an inner mandrel having an upper end section and a lower end section configured to be operably connectable and rotatable with an upper workstring section and a lower workstring section, the inner mandrel comprising a longitudinal passage forming a continuation of a passage in the workstring. An outer housing is configured to seal the inner mandrel inside the outer housing. The outer diameter of the outer housing and the length of the outer housing is configured to fit a casing ram. In contrast to prior art tools placed within annular blowout preventers which have limited differential pressure ranges, the instant device allows for differential pressure during operation as high as 10,000 psi or more. The instant devices also may allow for aggressive frac pack treatments and facilitate reverse out operations.

A system includes an outer completion string, an inner service string configured to connect within the outer completion string, and an upper completion. The outer completion string includes at least one isolation packer, a sand control assembly and a gravel pack extension disposed uphole of a washdown shoe in a bottom-most well zone. In a top well zone, the outer completion string includes a latch profile, a female inductive coupler, a gravel pack packer, and a sand control assembly and a gravel pack extension disposed downhole of the gravel pack packer. The inner service string includes, among other components, an inner concentric string that is concentrically arranged within a workstring creating an inner-annulus between the workstring and the inner concentric string. The upper completion includes a male inductive coupler that is configured to connect with the female inductive coupler of the outer completion string.

A system includes an outer completion string, an inner service string configured to connect within the outer completion string, and an upper completion. The outer completion string includes at least one isolation packer, a sand control assembly and a gravel pack extension disposed uphole of a washdown shoe in a bottom-most well zone. In a top well zone, the outer completion string includes a latch profile, a female inductive coupler, a gravel pack packer, and a sand control assembly and a gravel pack extension disposed downhole of the gravel pack packer. The inner service string includes, among other components, an inner concentric string that is concentrically arranged within a workstring creating an inner-annulus between the workstring and the inner concentric string. The upper completion includes a male inductive coupler that is configured to connect with the female inductive coupler of the outer completion string.

A low-pressure natural gas harvesting system that injects motive fluid into a first well by a compressor, which flows into a motive manifold that utilizes the Coandă effect to introduce a reduced pressure effect. The reduced pressure effect draws natural gas into the system from natural gas reservoirs through one or more inflow ports that are part of inflow manifolds, which may connect to a motive manifold. The natural gas and motive fluid mix after the motive fluid flows over a Coandă effect surface and the mixture is subsequently directed to flow to a production well.

A low-pressure natural gas harvesting system that injects motive fluid into a first well by a compressor, which flows into a motive manifold that utilizes the Coandă effect to introduce a reduced pressure effect. The reduced pressure effect draws natural gas into the system from natural gas reservoirs through one or more inflow ports that are part of inflow manifolds, which may connect to a motive manifold. The natural gas and motive fluid mix after the motive fluid flows over a Coandă effect surface and the mixture is subsequently directed to flow to a production well.

A rod section of a ground drilling rod configured at its end to form at least one plug connection and having at one end (a) a connecting plug with an outer contour; or (b) a connecting socket with an inner contour, the outer contour or the inner contour being essentially sinusoidal in cross section.

A reamer includes a housing, a first reamer block, and a second reamer block. The first reamer block includes a leading wall. A second reamer block includes a trailing wall, the trailing wall including a recess. The leading wall is inserted into or nested in the recess to increase the coverage-to-exposure ratio.